Pharmacology

COVID-19 vaccines are safe and effective for patients taking osteoporosis medications, according to joint guidance from six endocrine and osteoporosis societies and foundations.

They noted, though, that some timing modifications with certain medications should be considered to help distinguish between adverse events from the medication versus the vaccine.

The American Society for Bone and Mineral Research “is an international organization, so we brought together our sister societies that have a vested interested in bone health. Vaccination is happening worldwide, and we wanted to present a united front and united recommendations about how to handle osteoporosis medications appropriately during vaccination,” said Suzanne Jan De Beur, MD, who is president of ASBMR and an associate professor of medicine at Johns Hopkins University, Baltimore.

There has been quite a lot of concern from the community about vaccine and medications, from both physicians and patients wondering whether treatments and vaccines should occur in a certain order, and whether there should be a time gap between the two, said Dr. Jan De Beur. “There was a dearth of information about the best practices for osteoporosis treatment management during vaccination, and we didn’t want people missing their opportunity for a vaccine, and we also didn’t want them unnecessarily delaying their osteoporosis treatment.”

There is no evidence that osteoporosis therapies affect the risk or severity of COVID-19 disease, nor do they appear to change the disease course. Osteoporosis itself does not appear associated with increased risk of infection or severe outcomes, so patients with osteoporosis do not need to be prioritized for vaccination based on that condition alone.

There is no evidence that osteoporosis therapies affect the safety or efficacy of vaccination, but given that vaccine availability is currently inconsistent, patients may need to make temporary changes to their osteoporosis regimens to ensure they can receive vaccine when it is available, such as ensuring a delay between medication and vaccination injections.

A key reason for a delay between injectable or infusion medications and a vaccine is to distinguish between adverse events that could occur, so that an adverse reaction to vaccine isn’t mistaken for an adverse reaction to a drug. Nevertheless, the real world is messy. Dr. Jan De Beur noted a recent patient who arrived at her clinic for an injectable treatment who had just received a COVID-19 vaccination that morning. “We decided to put the injection in the other arm, rather than reschedule the person and put them through the risk of coming back. We could distinguish between injection-site reactions, at least,” she said.

copyright DesignPics/Thinkstock

No changes should be made to general bone health therapies, such as calcium and vitamin D supplementation, weight-bearing exercises, and maintenance of a balanced diet.

The guidance includes some recommendations for specific osteoporosis medications.

• Oral bisphosphonates: Alendronate, risedronate, and ibandronate should be continued.
• Intravenous bisphosphonates: a 7-day interval (4-day minimum) is recommended between intravenous bisphosphonate (zoledronic acid and ibandronate) infusion and COVID-19 vaccination in order to distinguish potential autoimmune or inflammatory reactions that could be attributable to either intravenous bisphosphonate or the vaccine.
• Denosumab: There should be a 4- to 7-day delay between denosumab infusion and COVID-19 vaccination to account for injection-site reactions. Another option is to have denosumab injected into the contralateral arm or another site like the abdomen or upper thigh, if spacing the injections is not possible. In any case, denosumab injections should be performed within 7 months of the previous dose.
• Teriparatide and abaloparatide should be continued.
• Romosozumab: There should be a 4- to 7-day delay between a romosozumab injection and COVID-19 vaccine, or romosozumab can be injected in the abdomen (with the exception of a 2-inch area around the naval) or thigh if spacing is not possible.
• Raloxifene should be continued in patients receiving COVID-19 vaccination.

Guidance signatories include ASBMR, the American Association of Clinical Endocrinology, the Endocrine Society, the European Calcified Tissue Society, the National Osteoporosis Foundation, and the International Osteoporosis Foundation.

Dr. Jan De Beur has no relevant financial disclosures.

COVID-19 vaccines are safe and effective for patients taking osteoporosis medications, according to joint guidance from six endocrine and osteoporosis societies and foundations.

They noted, though, that some timing modifications with certain medications should be considered to help distinguish between adverse events from the medication versus the vaccine.

The American Society for Bone and Mineral Research “is an international organization, so we brought together our sister societies that have a vested interested in bone health. Vaccination is happening worldwide, and we wanted to present a united front and united recommendations about how to handle osteoporosis medications appropriately during vaccination,” said Suzanne Jan De Beur, MD, who is president of ASBMR and an associate professor of medicine at Johns Hopkins University, Baltimore.

There has been quite a lot of concern from the community about vaccine and medications, from both physicians and patients wondering whether treatments and vaccines should occur in a certain order, and whether there should be a time gap between the two, said Dr. Jan De Beur. “There was a dearth of information about the best practices for osteoporosis treatment management during vaccination, and we didn’t want people missing their opportunity for a vaccine, and we also didn’t want them unnecessarily delaying their osteoporosis treatment.”

There is no evidence that osteoporosis therapies affect the risk or severity of COVID-19 disease, nor do they appear to change the disease course. Osteoporosis itself does not appear associated with increased risk of infection or severe outcomes, so patients with osteoporosis do not need to be prioritized for vaccination based on that condition alone.

There is no evidence that osteoporosis therapies affect the safety or efficacy of vaccination, but given that vaccine availability is currently inconsistent, patients may need to make temporary changes to their osteoporosis regimens to ensure they can receive vaccine when it is available, such as ensuring a delay between medication and vaccination injections.

A key reason for a delay between injectable or infusion medications and a vaccine is to distinguish between adverse events that could occur, so that an adverse reaction to vaccine isn’t mistaken for an adverse reaction to a drug. Nevertheless, the real world is messy. Dr. Jan De Beur noted a recent patient who arrived at her clinic for an injectable treatment who had just received a COVID-19 vaccination that morning. “We decided to put the injection in the other arm, rather than reschedule the person and put them through the risk of coming back. We could distinguish between injection-site reactions, at least,” she said.

copyright DesignPics/Thinkstock

No changes should be made to general bone health therapies, such as calcium and vitamin D supplementation, weight-bearing exercises, and maintenance of a balanced diet.

The guidance includes some recommendations for specific osteoporosis medications.

• Oral bisphosphonates: Alendronate, risedronate, and ibandronate should be continued.
• Intravenous bisphosphonates: a 7-day interval (4-day minimum) is recommended between intravenous bisphosphonate (zoledronic acid and ibandronate) infusion and COVID-19 vaccination in order to distinguish potential autoimmune or inflammatory reactions that could be attributable to either intravenous bisphosphonate or the vaccine.
• Denosumab: There should be a 4- to 7-day delay between denosumab infusion and COVID-19 vaccination to account for injection-site reactions. Another option is to have denosumab injected into the contralateral arm or another site like the abdomen or upper thigh, if spacing the injections is not possible. In any case, denosumab injections should be performed within 7 months of the previous dose.
• Teriparatide and abaloparatide should be continued.
• Romosozumab: There should be a 4- to 7-day delay between a romosozumab injection and COVID-19 vaccine, or romosozumab can be injected in the abdomen (with the exception of a 2-inch area around the naval) or thigh if spacing is not possible.
• Raloxifene should be continued in patients receiving COVID-19 vaccination.

Guidance signatories include ASBMR, the American Association of Clinical Endocrinology, the Endocrine Society, the European Calcified Tissue Society, the National Osteoporosis Foundation, and the International Osteoporosis Foundation.

Dr. Jan De Beur has no relevant financial disclosures.

COVID-19 vaccines are safe and effective for patients taking osteoporosis medications, according to joint guidance from six endocrine and osteoporosis societies and foundations.

They noted, though, that some timing modifications with certain medications should be considered to help distinguish between adverse events from the medication versus the vaccine.

The American Society for Bone and Mineral Research “is an international organization, so we brought together our sister societies that have a vested interested in bone health. Vaccination is happening worldwide, and we wanted to present a united front and united recommendations about how to handle osteoporosis medications appropriately during vaccination,” said Suzanne Jan De Beur, MD, who is president of ASBMR and an associate professor of medicine at Johns Hopkins University, Baltimore.

There has been quite a lot of concern from the community about vaccine and medications, from both physicians and patients wondering whether treatments and vaccines should occur in a certain order, and whether there should be a time gap between the two, said Dr. Jan De Beur. “There was a dearth of information about the best practices for osteoporosis treatment management during vaccination, and we didn’t want people missing their opportunity for a vaccine, and we also didn’t want them unnecessarily delaying their osteoporosis treatment.”

There is no evidence that osteoporosis therapies affect the risk or severity of COVID-19 disease, nor do they appear to change the disease course. Osteoporosis itself does not appear associated with increased risk of infection or severe outcomes, so patients with osteoporosis do not need to be prioritized for vaccination based on that condition alone.

There is no evidence that osteoporosis therapies affect the safety or efficacy of vaccination, but given that vaccine availability is currently inconsistent, patients may need to make temporary changes to their osteoporosis regimens to ensure they can receive vaccine when it is available, such as ensuring a delay between medication and vaccination injections.

A key reason for a delay between injectable or infusion medications and a vaccine is to distinguish between adverse events that could occur, so that an adverse reaction to vaccine isn’t mistaken for an adverse reaction to a drug. Nevertheless, the real world is messy. Dr. Jan De Beur noted a recent patient who arrived at her clinic for an injectable treatment who had just received a COVID-19 vaccination that morning. “We decided to put the injection in the other arm, rather than reschedule the person and put them through the risk of coming back. We could distinguish between injection-site reactions, at least,” she said.

copyright DesignPics/Thinkstock

No changes should be made to general bone health therapies, such as calcium and vitamin D supplementation, weight-bearing exercises, and maintenance of a balanced diet.

The guidance includes some recommendations for specific osteoporosis medications.

• Oral bisphosphonates: Alendronate, risedronate, and ibandronate should be continued.
• Intravenous bisphosphonates: a 7-day interval (4-day minimum) is recommended between intravenous bisphosphonate (zoledronic acid and ibandronate) infusion and COVID-19 vaccination in order to distinguish potential autoimmune or inflammatory reactions that could be attributable to either intravenous bisphosphonate or the vaccine.
• Denosumab: There should be a 4- to 7-day delay between denosumab infusion and COVID-19 vaccination to account for injection-site reactions. Another option is to have denosumab injected into the contralateral arm or another site like the abdomen or upper thigh, if spacing the injections is not possible. In any case, denosumab injections should be performed within 7 months of the previous dose.
• Teriparatide and abaloparatide should be continued.
• Romosozumab: There should be a 4- to 7-day delay between a romosozumab injection and COVID-19 vaccine, or romosozumab can be injected in the abdomen (with the exception of a 2-inch area around the naval) or thigh if spacing is not possible.
• Raloxifene should be continued in patients receiving COVID-19 vaccination.

Guidance signatories include ASBMR, the American Association of Clinical Endocrinology, the Endocrine Society, the European Calcified Tissue Society, the National Osteoporosis Foundation, and the International Osteoporosis Foundation.

Dr. Jan De Beur has no relevant financial disclosures.

Evaluation of oral antineoplastic agent (OAN) adherence patterns have identified correlations between nonadherence or over-adherence and poorer disease-related outcomes. Multiple studies have focused on imatinib use in chronic myeloid leukemia (CML) due to its continuous, long-term use. A study by Ganesan and colleagues found that nonadherence to imatinib showed a significant decrease in 5-year event-free survival between 76.7% of adherent participants compared with 59.8% of nonadherent participants.¹ This study found that 44% of patients who were adherent to imatinib achieved complete cytogenetic response vs only 26% of patients who were nonadherent. In another study of imatinib for CML, major molecular response (MMR) was strongly correlated with adherence and no patients with adherence < 80% were able to achieve MMR.² Similarly, in studies of tamoxifen for breast cancer, < 80% adherence resulted in a 10% decrease in survival when compared to those who were more adherent.^3,4

In addition to the clinical implications of nonadherence, there can be a significant cost associated with suboptimal use of these medications. The price of a single dose of OAN medication may cost as much as $440.⁵

The benefits of multidisciplinary care teams have been identified in many studies.^6,7 While studies are limited in oncology, pharmacists provide vital contributions to the oncology multidisciplinary team when managing OANs as these health care professionals have expert knowledge of the medications, potential adverse events (AEs), and necessary monitoring parameters.⁸ In one study, patients seen by the pharmacist-led oral chemotherapy management program experienced improved clinical outcomes and response to therapy when compared with preintervention patients (early molecular response, 88.9% vs 54.8%, P = .01; major molecular response, 83.3% vs 57.6%, P = .06).⁹ During the study, 318 AEs were reported, leading to 235 pharmacist interventions to ameliorate AEs and improve adherence.

The primary objective of this study was to measure the impact of a pharmacist-driven OAN renewal clinic on medication adherence. The secondary objective was to estimate cost-savings of this new service.

Methods

Prior to July 2014, several limitations were identified related to OAN prescribing and monitoring at the Richard L. Roudebush Veterans Affairs Medical Center in Indianapolis, Indiana (RLRVAMC). The prescription ordering process relied primarily on the patient to initiate refills, rather than the prescriber OAN prescriptions also lacked consistency for number of refills or quantities dispensed. Furthermore, ordering of antineoplastic products was not limited to hematology/oncology providers. Patients were identified with significant supply on hand at the time of medication discontinuation, creating concerns for medication waste, tolerability, and nonadherence.

As a result, opportunities were identified to improve the prescribing process, recommended monitoring, toxicity and tolerability evaluation, medication reconciliation, and medication adherence. In July of 2014, the RLRVAMC adopted a new chemotherapy order entry system capable of restricting prescriptions to hematology/oncology providers and limiting dispensed quantities and refill amounts. A comprehensive pharmacist driven OAN renewal clinic was implemented on September 1, 2014 with the goal of improving long-term adherence and tolerability, in addition to minimizing medication waste.

Study Design and Setting

This was a pre/post retrospective cohort, quality improvement study of patients enrolled in the RLRVAMC OAN pharmacist renewal clinic. The study was deemed exempt from institutional review board (IRB) by the US Department of Veterans Affairs (VA) Research and Development Department.

Study Population

Patients were included in the preimplementation group if they had received at least 2 prescriptions of an eligible OAN. Therapy for the preimplementation group was required to be a monthly duration > 21 days and between the dates of September 1, 2013 and August 31, 2014. Patients were included in the postimplementation group if they had received at least 2 prescriptions of the studied OANs between September 1, 2014 and January 31, 2015. Patients were excluded if they had filled < 2 prescriptions of OAN; were managed by a non-VA oncologist or hematologist; or received an OAN other than those listed in Table 1.

Data Collection

For all patients in both the pre- and postimplementation cohorts, a standardized data collection tool was used to collect the following via electronic health record review by a PGY2 oncology resident: age, race, gender, oral antineoplastic agent, refill dates, days’ supply, estimated unit cost per dose cancer diagnosis, distance from the RLRVAMC, copay status, presence of hospitalizations/ED visits/dosage reductions, discontinuation rates, reasons for discontinuation, and total number of current prescriptions. The presence or absence of dosage reductions were collected to identify concerns for tolerability, but only the original dose for the preimplementation group and dosage at time of clinic enrollment for the postimplementation group was included in the analysis.

Outcomes and Statistical Analyses

The primary outcome was medication adherence defined as the median medication possession ratio (MPR) before and after implementation of the clinic. Secondary outcomes included the proportion of patients who were adherent from before implementation to after and estimated cost-savings of this clinic after implementation. MPR was used to estimate medication adherence by taking the cumulative day supply of medication on hand divided by the number of days on therapy.¹² Number of days on therapy was determined by taking the difference on the start date of the new medication regimen and the discontinuation date of the same regimen. Patients were grouped by adherence into one of the following categories: < 0.8, 0.8 to 0.89, 0.9 to 1, and > 1.1. Patients were considered adherent if they reported taking ≥ 90% (MPR ≥ 0.9) of prescribed doses, adopted from the study by Anderson and colleagues.¹² A patient with an MPR > 1, likely due to filling prior to the anticipated refill date, was considered 100% adherent (MPR = 1). If a patient switched OAN during the study, both agents were included as separate entities.

A conservative estimate of cost-savings was made by multiplying the RLRVAMC cost per unit of medication at time of initial prescription fill by the number of units taken each day multiplied by the total days’ supply on hand at time of therapy discontinuation. Patients with an MPR < 1 at time of therapy discontinuation were assumed to have zero remaining units on hand and zero cost savings was estimated. Waste, for purposes of cost-savings, was calculated for all MPR values > 1. Additional supply anticipated to be on hand from dose reductions was not included in the estimated cost of unused medication.

Descriptive statistics compared demographic characteristics between the pre- and postimplementation groups. MPR data were not normally distributed, which required the use of nonparametric Mann-Whitney U tests to compare pre- and postMPRs. Pearson χ² compared the proportion of adherent patients between groups while descriptive statistics were used to estimate cost savings. Significance was determined based on a P value < .05. IBM SPSS Statistics software was used for all statistical analyses. As this was a complete sample of all eligible subjects, no sample size calculation was performed.

Results

In the preimplementation period, 246 patients received an OAN and 61 patients received an OAN in the postimplementation period (Figure 1). Of the 246 patients in the preimplementation period, 98 were eligible and included in the preimplementation group. Similarly, of the 61 patients in the postimplementation period, 35 patients met inclusion criteria for the postimplementation group. The study population was predominantly male with an average age of approximately 70 years in both groups (Table 3). More than 70% of the population in each group was White. No statistically significant differences between groups were identified. The most commonly prescribed OAN in the preimplementation group were abiraterone, imatinib, and enzalutamide (Table 3). In the postimplementation group, the most commonly prescribed agents were abiraterone, imatinib, pazopanib, and dasatinib. No significant differences were observed in prescribing of individual agents between the pre- and postimplementation groups or other characteristics that may affect adherence including patient copay status, number of concomitant medications, and driving distance from the RLRVAMC.

Thirty-six (36.7%) patients in the preimplementation group were considered nonadherent (MPR < 0.9) and 18 (18.4%) had an MPR < 0.8. Fifteen (15.3%) patients in the preimplementation clinic were considered overadherent (MPR > 1.1). Forty-seven (47.9%) patients in the preimplementation group were considered adherent (MPR 0.9 - 1.1) while all 35 (100%) patients in the postimplementation group were considered adherent (MPR 0.9 - 1.1). No non- or overadherent patients were identified in the postimplementation group (Figure 2). The median MPR for all patients in the preimplementation group was 0.94 compared with 1.06 (P < .001) in the postimplementation group.

Discussion

OANs are widely used therapies, with more than 25 million doses administered per year in the United States alone.¹² The use of these agents will continue to grow as more targeted agents become available and patients request more convenient treatment options. The role for hematology/oncology clinical pharmacy services must adapt to this increased usage of OANs, including increasing pharmacist involvement in medication education, adherence and tolerability assessments, and proactive drug interaction monitoring.However, additional research is needed to determine optimal management strategies.

Our study aimed to compare OAN adherence among patients at a tertiary care VA hospital before and after implementation of a renewal clinic. The preimplementation population had a median MPR of 0.94 compared with 1.06 in the postimplementation group (P < .001). Although an ideal MPR is 1.0, we aimed for a slightly higher MPR to allow a supply buffer in the event of prescription delivery delays, as more than 90% of prescriptions are mailed to patients from a regional mail-order pharmacy. Importantly, the median MPRs do not adequately convey the impact from this clinic. The proportion of patients who were considered adherent to OANs increased from 47.9% in the preimplementation to 100% in the postimplementation period. These finding suggest that the clinical pharmacist role to assess and encourage adherence through monitoring tolerability of these OANs improved the overall medication taking experience of these patients.

Upon initial evaluation of adherence pre- and postimplementation, median adherence rates in both groups appeared to be above goal at 0.94 and 1.06 respectively. Patients in the postimplementation group intentionally received a 5- to 7-day supply buffer to account for potential prescription delivery delays due to holidays and inclement weather. This would indicate that the patients in the postimplementation group would have 15% oversupply due to the 5-day supply buffer. After correcting for patients with confounding reasons for excess (dose reductions, breaks in treatment, etc.), the median MPR in the prerefill clinic group decreased to 0.9 and the MPR in the postrefill clinic group increased slightly to 1.08. Although the median adherence rate in both the pre- and postimplementation groups were above goal of 0.90, 36% of the patients in the preimplementation group were considered nonadherent (MPR < 0.9) compared with no patients in the postimplementation group. Therefore, our intervention to improve patient adherence appeared to be beneficial at our institution.

In addition to improving adherence, one of the goals of the renewal clinic was to minimize excess supply at the time of therapy discontinuation. This was accomplished by aligning medication fills with medical visits and objective monitoring, as well as limiting supply to no more than 30 days. Of the patients in the postimplementation group, only 1 patient had remaining medication at the time of therapy discontinuation compared with 14 patients in the preimplementation group. The estimated cost savings from excess supply was $36,335. Limiting the amount of unused supply not only saves money for the patient and the institution, but also decreases opportunity for improper hazardous waste disposal and unnecessary exposure of hazardous materials to others.

Our results show the pharmacist intervention in the coordination of renewals improved adherence, minimized medication waste, and saved money. The cost of pharmacist time participating in the refill clinic was not calculated. Each visit was completed in approximately 5 minutes, with subsequent documentation and coordination taking an additional 5 to 10 minutes. During the launch of this service, the oncology pharmacy resident provided all coverage of the clinic. Oversite of the resident was provided by hematology/oncology clinical pharmacy specialists. We have continued to utilize pharmacy resident coverage since that time to meet education needs and keep the estimated cost per visit low. Another option in the case that pharmacy residents are not available would be utilization of a pharmacy technician, intern, or professional student to conduct the adherence and tolerability phone assessments. Our escalation protocol allows intervention by clinical pharmacy specialist and/or other health care providers when necessary. Trainees have only required basic training on how to use the protocol.

Limitations

Due to this study’s retrospective design, an inherent limitation is dependence on prescriber and refill records for documentation of initiation and discontinuation dates. Therefore, only the association of impact of pharmacist intervention on medication adherence can be determined as opposed to causation. We did not take into account discrepancies in day supply secondary to ‘held’ therapies, dose reductions, or doses supplied during an inpatient admission, which may alter estimates of MPR and cost-savings data. Patients in the postimplementation group intentionally received a 5 to 7-day supply buffer to account for potential prescription delivery delays due to holidays and inclement weather. This would indicate that the patients in the postimplementation group would have 15% oversupply due to the 5-day supply buffer, thereby skewing MPR values. This study did not account for cost avoidance resulting from early identification and management of toxicity. Finally, the postimplementation data only spans 4 months and a longer duration of time is needed to more accurately determine sustainability of renewal clinic interventions and provide comprehensive evaluation of cost-avoidance.

Conclusion

Implementation of an OAN renewal clinic was associated with an increase in MPR, improved proportion of patients considered adherent, and an estimated $36,335 cost-savings. However, prospective evaluation and a longer study duration are needed to determine causality of improved adherence and cost-savings associated with a pharmacist-driven OAN renewal clinic.

Evaluation of oral antineoplastic agent (OAN) adherence patterns have identified correlations between nonadherence or over-adherence and poorer disease-related outcomes. Multiple studies have focused on imatinib use in chronic myeloid leukemia (CML) due to its continuous, long-term use. A study by Ganesan and colleagues found that nonadherence to imatinib showed a significant decrease in 5-year event-free survival between 76.7% of adherent participants compared with 59.8% of nonadherent participants.¹ This study found that 44% of patients who were adherent to imatinib achieved complete cytogenetic response vs only 26% of patients who were nonadherent. In another study of imatinib for CML, major molecular response (MMR) was strongly correlated with adherence and no patients with adherence < 80% were able to achieve MMR.² Similarly, in studies of tamoxifen for breast cancer, < 80% adherence resulted in a 10% decrease in survival when compared to those who were more adherent.^3,4

In addition to the clinical implications of nonadherence, there can be a significant cost associated with suboptimal use of these medications. The price of a single dose of OAN medication may cost as much as $440.⁵

The benefits of multidisciplinary care teams have been identified in many studies.^6,7 While studies are limited in oncology, pharmacists provide vital contributions to the oncology multidisciplinary team when managing OANs as these health care professionals have expert knowledge of the medications, potential adverse events (AEs), and necessary monitoring parameters.⁸ In one study, patients seen by the pharmacist-led oral chemotherapy management program experienced improved clinical outcomes and response to therapy when compared with preintervention patients (early molecular response, 88.9% vs 54.8%, P = .01; major molecular response, 83.3% vs 57.6%, P = .06).⁹ During the study, 318 AEs were reported, leading to 235 pharmacist interventions to ameliorate AEs and improve adherence.

The primary objective of this study was to measure the impact of a pharmacist-driven OAN renewal clinic on medication adherence. The secondary objective was to estimate cost-savings of this new service.

Methods

Prior to July 2014, several limitations were identified related to OAN prescribing and monitoring at the Richard L. Roudebush Veterans Affairs Medical Center in Indianapolis, Indiana (RLRVAMC). The prescription ordering process relied primarily on the patient to initiate refills, rather than the prescriber OAN prescriptions also lacked consistency for number of refills or quantities dispensed. Furthermore, ordering of antineoplastic products was not limited to hematology/oncology providers. Patients were identified with significant supply on hand at the time of medication discontinuation, creating concerns for medication waste, tolerability, and nonadherence.

As a result, opportunities were identified to improve the prescribing process, recommended monitoring, toxicity and tolerability evaluation, medication reconciliation, and medication adherence. In July of 2014, the RLRVAMC adopted a new chemotherapy order entry system capable of restricting prescriptions to hematology/oncology providers and limiting dispensed quantities and refill amounts. A comprehensive pharmacist driven OAN renewal clinic was implemented on September 1, 2014 with the goal of improving long-term adherence and tolerability, in addition to minimizing medication waste.

Study Design and Setting

This was a pre/post retrospective cohort, quality improvement study of patients enrolled in the RLRVAMC OAN pharmacist renewal clinic. The study was deemed exempt from institutional review board (IRB) by the US Department of Veterans Affairs (VA) Research and Development Department.

Study Population

Patients were included in the preimplementation group if they had received at least 2 prescriptions of an eligible OAN. Therapy for the preimplementation group was required to be a monthly duration > 21 days and between the dates of September 1, 2013 and August 31, 2014. Patients were included in the postimplementation group if they had received at least 2 prescriptions of the studied OANs between September 1, 2014 and January 31, 2015. Patients were excluded if they had filled < 2 prescriptions of OAN; were managed by a non-VA oncologist or hematologist; or received an OAN other than those listed in Table 1.

Data Collection

For all patients in both the pre- and postimplementation cohorts, a standardized data collection tool was used to collect the following via electronic health record review by a PGY2 oncology resident: age, race, gender, oral antineoplastic agent, refill dates, days’ supply, estimated unit cost per dose cancer diagnosis, distance from the RLRVAMC, copay status, presence of hospitalizations/ED visits/dosage reductions, discontinuation rates, reasons for discontinuation, and total number of current prescriptions. The presence or absence of dosage reductions were collected to identify concerns for tolerability, but only the original dose for the preimplementation group and dosage at time of clinic enrollment for the postimplementation group was included in the analysis.

Outcomes and Statistical Analyses

The primary outcome was medication adherence defined as the median medication possession ratio (MPR) before and after implementation of the clinic. Secondary outcomes included the proportion of patients who were adherent from before implementation to after and estimated cost-savings of this clinic after implementation. MPR was used to estimate medication adherence by taking the cumulative day supply of medication on hand divided by the number of days on therapy.¹² Number of days on therapy was determined by taking the difference on the start date of the new medication regimen and the discontinuation date of the same regimen. Patients were grouped by adherence into one of the following categories: < 0.8, 0.8 to 0.89, 0.9 to 1, and > 1.1. Patients were considered adherent if they reported taking ≥ 90% (MPR ≥ 0.9) of prescribed doses, adopted from the study by Anderson and colleagues.¹² A patient with an MPR > 1, likely due to filling prior to the anticipated refill date, was considered 100% adherent (MPR = 1). If a patient switched OAN during the study, both agents were included as separate entities.

A conservative estimate of cost-savings was made by multiplying the RLRVAMC cost per unit of medication at time of initial prescription fill by the number of units taken each day multiplied by the total days’ supply on hand at time of therapy discontinuation. Patients with an MPR < 1 at time of therapy discontinuation were assumed to have zero remaining units on hand and zero cost savings was estimated. Waste, for purposes of cost-savings, was calculated for all MPR values > 1. Additional supply anticipated to be on hand from dose reductions was not included in the estimated cost of unused medication.

Descriptive statistics compared demographic characteristics between the pre- and postimplementation groups. MPR data were not normally distributed, which required the use of nonparametric Mann-Whitney U tests to compare pre- and postMPRs. Pearson χ² compared the proportion of adherent patients between groups while descriptive statistics were used to estimate cost savings. Significance was determined based on a P value < .05. IBM SPSS Statistics software was used for all statistical analyses. As this was a complete sample of all eligible subjects, no sample size calculation was performed.

Results

In the preimplementation period, 246 patients received an OAN and 61 patients received an OAN in the postimplementation period (Figure 1). Of the 246 patients in the preimplementation period, 98 were eligible and included in the preimplementation group. Similarly, of the 61 patients in the postimplementation period, 35 patients met inclusion criteria for the postimplementation group. The study population was predominantly male with an average age of approximately 70 years in both groups (Table 3). More than 70% of the population in each group was White. No statistically significant differences between groups were identified. The most commonly prescribed OAN in the preimplementation group were abiraterone, imatinib, and enzalutamide (Table 3). In the postimplementation group, the most commonly prescribed agents were abiraterone, imatinib, pazopanib, and dasatinib. No significant differences were observed in prescribing of individual agents between the pre- and postimplementation groups or other characteristics that may affect adherence including patient copay status, number of concomitant medications, and driving distance from the RLRVAMC.

Thirty-six (36.7%) patients in the preimplementation group were considered nonadherent (MPR < 0.9) and 18 (18.4%) had an MPR < 0.8. Fifteen (15.3%) patients in the preimplementation clinic were considered overadherent (MPR > 1.1). Forty-seven (47.9%) patients in the preimplementation group were considered adherent (MPR 0.9 - 1.1) while all 35 (100%) patients in the postimplementation group were considered adherent (MPR 0.9 - 1.1). No non- or overadherent patients were identified in the postimplementation group (Figure 2). The median MPR for all patients in the preimplementation group was 0.94 compared with 1.06 (P < .001) in the postimplementation group.

Discussion

OANs are widely used therapies, with more than 25 million doses administered per year in the United States alone.¹² The use of these agents will continue to grow as more targeted agents become available and patients request more convenient treatment options. The role for hematology/oncology clinical pharmacy services must adapt to this increased usage of OANs, including increasing pharmacist involvement in medication education, adherence and tolerability assessments, and proactive drug interaction monitoring.However, additional research is needed to determine optimal management strategies.

Our study aimed to compare OAN adherence among patients at a tertiary care VA hospital before and after implementation of a renewal clinic. The preimplementation population had a median MPR of 0.94 compared with 1.06 in the postimplementation group (P < .001). Although an ideal MPR is 1.0, we aimed for a slightly higher MPR to allow a supply buffer in the event of prescription delivery delays, as more than 90% of prescriptions are mailed to patients from a regional mail-order pharmacy. Importantly, the median MPRs do not adequately convey the impact from this clinic. The proportion of patients who were considered adherent to OANs increased from 47.9% in the preimplementation to 100% in the postimplementation period. These finding suggest that the clinical pharmacist role to assess and encourage adherence through monitoring tolerability of these OANs improved the overall medication taking experience of these patients.

Upon initial evaluation of adherence pre- and postimplementation, median adherence rates in both groups appeared to be above goal at 0.94 and 1.06 respectively. Patients in the postimplementation group intentionally received a 5- to 7-day supply buffer to account for potential prescription delivery delays due to holidays and inclement weather. This would indicate that the patients in the postimplementation group would have 15% oversupply due to the 5-day supply buffer. After correcting for patients with confounding reasons for excess (dose reductions, breaks in treatment, etc.), the median MPR in the prerefill clinic group decreased to 0.9 and the MPR in the postrefill clinic group increased slightly to 1.08. Although the median adherence rate in both the pre- and postimplementation groups were above goal of 0.90, 36% of the patients in the preimplementation group were considered nonadherent (MPR < 0.9) compared with no patients in the postimplementation group. Therefore, our intervention to improve patient adherence appeared to be beneficial at our institution.

In addition to improving adherence, one of the goals of the renewal clinic was to minimize excess supply at the time of therapy discontinuation. This was accomplished by aligning medication fills with medical visits and objective monitoring, as well as limiting supply to no more than 30 days. Of the patients in the postimplementation group, only 1 patient had remaining medication at the time of therapy discontinuation compared with 14 patients in the preimplementation group. The estimated cost savings from excess supply was $36,335. Limiting the amount of unused supply not only saves money for the patient and the institution, but also decreases opportunity for improper hazardous waste disposal and unnecessary exposure of hazardous materials to others.

Our results show the pharmacist intervention in the coordination of renewals improved adherence, minimized medication waste, and saved money. The cost of pharmacist time participating in the refill clinic was not calculated. Each visit was completed in approximately 5 minutes, with subsequent documentation and coordination taking an additional 5 to 10 minutes. During the launch of this service, the oncology pharmacy resident provided all coverage of the clinic. Oversite of the resident was provided by hematology/oncology clinical pharmacy specialists. We have continued to utilize pharmacy resident coverage since that time to meet education needs and keep the estimated cost per visit low. Another option in the case that pharmacy residents are not available would be utilization of a pharmacy technician, intern, or professional student to conduct the adherence and tolerability phone assessments. Our escalation protocol allows intervention by clinical pharmacy specialist and/or other health care providers when necessary. Trainees have only required basic training on how to use the protocol.

Limitations

Due to this study’s retrospective design, an inherent limitation is dependence on prescriber and refill records for documentation of initiation and discontinuation dates. Therefore, only the association of impact of pharmacist intervention on medication adherence can be determined as opposed to causation. We did not take into account discrepancies in day supply secondary to ‘held’ therapies, dose reductions, or doses supplied during an inpatient admission, which may alter estimates of MPR and cost-savings data. Patients in the postimplementation group intentionally received a 5 to 7-day supply buffer to account for potential prescription delivery delays due to holidays and inclement weather. This would indicate that the patients in the postimplementation group would have 15% oversupply due to the 5-day supply buffer, thereby skewing MPR values. This study did not account for cost avoidance resulting from early identification and management of toxicity. Finally, the postimplementation data only spans 4 months and a longer duration of time is needed to more accurately determine sustainability of renewal clinic interventions and provide comprehensive evaluation of cost-avoidance.

Conclusion

Implementation of an OAN renewal clinic was associated with an increase in MPR, improved proportion of patients considered adherent, and an estimated $36,335 cost-savings. However, prospective evaluation and a longer study duration are needed to determine causality of improved adherence and cost-savings associated with a pharmacist-driven OAN renewal clinic.

Evaluation of oral antineoplastic agent (OAN) adherence patterns have identified correlations between nonadherence or over-adherence and poorer disease-related outcomes. Multiple studies have focused on imatinib use in chronic myeloid leukemia (CML) due to its continuous, long-term use. A study by Ganesan and colleagues found that nonadherence to imatinib showed a significant decrease in 5-year event-free survival between 76.7% of adherent participants compared with 59.8% of nonadherent participants.¹ This study found that 44% of patients who were adherent to imatinib achieved complete cytogenetic response vs only 26% of patients who were nonadherent. In another study of imatinib for CML, major molecular response (MMR) was strongly correlated with adherence and no patients with adherence < 80% were able to achieve MMR.² Similarly, in studies of tamoxifen for breast cancer, < 80% adherence resulted in a 10% decrease in survival when compared to those who were more adherent.^3,4

In addition to the clinical implications of nonadherence, there can be a significant cost associated with suboptimal use of these medications. The price of a single dose of OAN medication may cost as much as $440.⁵

The benefits of multidisciplinary care teams have been identified in many studies.^6,7 While studies are limited in oncology, pharmacists provide vital contributions to the oncology multidisciplinary team when managing OANs as these health care professionals have expert knowledge of the medications, potential adverse events (AEs), and necessary monitoring parameters.⁸ In one study, patients seen by the pharmacist-led oral chemotherapy management program experienced improved clinical outcomes and response to therapy when compared with preintervention patients (early molecular response, 88.9% vs 54.8%, P = .01; major molecular response, 83.3% vs 57.6%, P = .06).⁹ During the study, 318 AEs were reported, leading to 235 pharmacist interventions to ameliorate AEs and improve adherence.

The primary objective of this study was to measure the impact of a pharmacist-driven OAN renewal clinic on medication adherence. The secondary objective was to estimate cost-savings of this new service.

Methods

Prior to July 2014, several limitations were identified related to OAN prescribing and monitoring at the Richard L. Roudebush Veterans Affairs Medical Center in Indianapolis, Indiana (RLRVAMC). The prescription ordering process relied primarily on the patient to initiate refills, rather than the prescriber OAN prescriptions also lacked consistency for number of refills or quantities dispensed. Furthermore, ordering of antineoplastic products was not limited to hematology/oncology providers. Patients were identified with significant supply on hand at the time of medication discontinuation, creating concerns for medication waste, tolerability, and nonadherence.

As a result, opportunities were identified to improve the prescribing process, recommended monitoring, toxicity and tolerability evaluation, medication reconciliation, and medication adherence. In July of 2014, the RLRVAMC adopted a new chemotherapy order entry system capable of restricting prescriptions to hematology/oncology providers and limiting dispensed quantities and refill amounts. A comprehensive pharmacist driven OAN renewal clinic was implemented on September 1, 2014 with the goal of improving long-term adherence and tolerability, in addition to minimizing medication waste.

Study Design and Setting

This was a pre/post retrospective cohort, quality improvement study of patients enrolled in the RLRVAMC OAN pharmacist renewal clinic. The study was deemed exempt from institutional review board (IRB) by the US Department of Veterans Affairs (VA) Research and Development Department.

Study Population

Patients were included in the preimplementation group if they had received at least 2 prescriptions of an eligible OAN. Therapy for the preimplementation group was required to be a monthly duration > 21 days and between the dates of September 1, 2013 and August 31, 2014. Patients were included in the postimplementation group if they had received at least 2 prescriptions of the studied OANs between September 1, 2014 and January 31, 2015. Patients were excluded if they had filled < 2 prescriptions of OAN; were managed by a non-VA oncologist or hematologist; or received an OAN other than those listed in Table 1.

Data Collection

For all patients in both the pre- and postimplementation cohorts, a standardized data collection tool was used to collect the following via electronic health record review by a PGY2 oncology resident: age, race, gender, oral antineoplastic agent, refill dates, days’ supply, estimated unit cost per dose cancer diagnosis, distance from the RLRVAMC, copay status, presence of hospitalizations/ED visits/dosage reductions, discontinuation rates, reasons for discontinuation, and total number of current prescriptions. The presence or absence of dosage reductions were collected to identify concerns for tolerability, but only the original dose for the preimplementation group and dosage at time of clinic enrollment for the postimplementation group was included in the analysis.

Outcomes and Statistical Analyses

The primary outcome was medication adherence defined as the median medication possession ratio (MPR) before and after implementation of the clinic. Secondary outcomes included the proportion of patients who were adherent from before implementation to after and estimated cost-savings of this clinic after implementation. MPR was used to estimate medication adherence by taking the cumulative day supply of medication on hand divided by the number of days on therapy.¹² Number of days on therapy was determined by taking the difference on the start date of the new medication regimen and the discontinuation date of the same regimen. Patients were grouped by adherence into one of the following categories: < 0.8, 0.8 to 0.89, 0.9 to 1, and > 1.1. Patients were considered adherent if they reported taking ≥ 90% (MPR ≥ 0.9) of prescribed doses, adopted from the study by Anderson and colleagues.¹² A patient with an MPR > 1, likely due to filling prior to the anticipated refill date, was considered 100% adherent (MPR = 1). If a patient switched OAN during the study, both agents were included as separate entities.

A conservative estimate of cost-savings was made by multiplying the RLRVAMC cost per unit of medication at time of initial prescription fill by the number of units taken each day multiplied by the total days’ supply on hand at time of therapy discontinuation. Patients with an MPR < 1 at time of therapy discontinuation were assumed to have zero remaining units on hand and zero cost savings was estimated. Waste, for purposes of cost-savings, was calculated for all MPR values > 1. Additional supply anticipated to be on hand from dose reductions was not included in the estimated cost of unused medication.

Descriptive statistics compared demographic characteristics between the pre- and postimplementation groups. MPR data were not normally distributed, which required the use of nonparametric Mann-Whitney U tests to compare pre- and postMPRs. Pearson χ² compared the proportion of adherent patients between groups while descriptive statistics were used to estimate cost savings. Significance was determined based on a P value < .05. IBM SPSS Statistics software was used for all statistical analyses. As this was a complete sample of all eligible subjects, no sample size calculation was performed.

Results

In the preimplementation period, 246 patients received an OAN and 61 patients received an OAN in the postimplementation period (Figure 1). Of the 246 patients in the preimplementation period, 98 were eligible and included in the preimplementation group. Similarly, of the 61 patients in the postimplementation period, 35 patients met inclusion criteria for the postimplementation group. The study population was predominantly male with an average age of approximately 70 years in both groups (Table 3). More than 70% of the population in each group was White. No statistically significant differences between groups were identified. The most commonly prescribed OAN in the preimplementation group were abiraterone, imatinib, and enzalutamide (Table 3). In the postimplementation group, the most commonly prescribed agents were abiraterone, imatinib, pazopanib, and dasatinib. No significant differences were observed in prescribing of individual agents between the pre- and postimplementation groups or other characteristics that may affect adherence including patient copay status, number of concomitant medications, and driving distance from the RLRVAMC.

Thirty-six (36.7%) patients in the preimplementation group were considered nonadherent (MPR < 0.9) and 18 (18.4%) had an MPR < 0.8. Fifteen (15.3%) patients in the preimplementation clinic were considered overadherent (MPR > 1.1). Forty-seven (47.9%) patients in the preimplementation group were considered adherent (MPR 0.9 - 1.1) while all 35 (100%) patients in the postimplementation group were considered adherent (MPR 0.9 - 1.1). No non- or overadherent patients were identified in the postimplementation group (Figure 2). The median MPR for all patients in the preimplementation group was 0.94 compared with 1.06 (P < .001) in the postimplementation group.

Discussion

OANs are widely used therapies, with more than 25 million doses administered per year in the United States alone.¹² The use of these agents will continue to grow as more targeted agents become available and patients request more convenient treatment options. The role for hematology/oncology clinical pharmacy services must adapt to this increased usage of OANs, including increasing pharmacist involvement in medication education, adherence and tolerability assessments, and proactive drug interaction monitoring.However, additional research is needed to determine optimal management strategies.

Our study aimed to compare OAN adherence among patients at a tertiary care VA hospital before and after implementation of a renewal clinic. The preimplementation population had a median MPR of 0.94 compared with 1.06 in the postimplementation group (P < .001). Although an ideal MPR is 1.0, we aimed for a slightly higher MPR to allow a supply buffer in the event of prescription delivery delays, as more than 90% of prescriptions are mailed to patients from a regional mail-order pharmacy. Importantly, the median MPRs do not adequately convey the impact from this clinic. The proportion of patients who were considered adherent to OANs increased from 47.9% in the preimplementation to 100% in the postimplementation period. These finding suggest that the clinical pharmacist role to assess and encourage adherence through monitoring tolerability of these OANs improved the overall medication taking experience of these patients.

Upon initial evaluation of adherence pre- and postimplementation, median adherence rates in both groups appeared to be above goal at 0.94 and 1.06 respectively. Patients in the postimplementation group intentionally received a 5- to 7-day supply buffer to account for potential prescription delivery delays due to holidays and inclement weather. This would indicate that the patients in the postimplementation group would have 15% oversupply due to the 5-day supply buffer. After correcting for patients with confounding reasons for excess (dose reductions, breaks in treatment, etc.), the median MPR in the prerefill clinic group decreased to 0.9 and the MPR in the postrefill clinic group increased slightly to 1.08. Although the median adherence rate in both the pre- and postimplementation groups were above goal of 0.90, 36% of the patients in the preimplementation group were considered nonadherent (MPR < 0.9) compared with no patients in the postimplementation group. Therefore, our intervention to improve patient adherence appeared to be beneficial at our institution.

In addition to improving adherence, one of the goals of the renewal clinic was to minimize excess supply at the time of therapy discontinuation. This was accomplished by aligning medication fills with medical visits and objective monitoring, as well as limiting supply to no more than 30 days. Of the patients in the postimplementation group, only 1 patient had remaining medication at the time of therapy discontinuation compared with 14 patients in the preimplementation group. The estimated cost savings from excess supply was $36,335. Limiting the amount of unused supply not only saves money for the patient and the institution, but also decreases opportunity for improper hazardous waste disposal and unnecessary exposure of hazardous materials to others.

Our results show the pharmacist intervention in the coordination of renewals improved adherence, minimized medication waste, and saved money. The cost of pharmacist time participating in the refill clinic was not calculated. Each visit was completed in approximately 5 minutes, with subsequent documentation and coordination taking an additional 5 to 10 minutes. During the launch of this service, the oncology pharmacy resident provided all coverage of the clinic. Oversite of the resident was provided by hematology/oncology clinical pharmacy specialists. We have continued to utilize pharmacy resident coverage since that time to meet education needs and keep the estimated cost per visit low. Another option in the case that pharmacy residents are not available would be utilization of a pharmacy technician, intern, or professional student to conduct the adherence and tolerability phone assessments. Our escalation protocol allows intervention by clinical pharmacy specialist and/or other health care providers when necessary. Trainees have only required basic training on how to use the protocol.

Limitations

Due to this study’s retrospective design, an inherent limitation is dependence on prescriber and refill records for documentation of initiation and discontinuation dates. Therefore, only the association of impact of pharmacist intervention on medication adherence can be determined as opposed to causation. We did not take into account discrepancies in day supply secondary to ‘held’ therapies, dose reductions, or doses supplied during an inpatient admission, which may alter estimates of MPR and cost-savings data. Patients in the postimplementation group intentionally received a 5 to 7-day supply buffer to account for potential prescription delivery delays due to holidays and inclement weather. This would indicate that the patients in the postimplementation group would have 15% oversupply due to the 5-day supply buffer, thereby skewing MPR values. This study did not account for cost avoidance resulting from early identification and management of toxicity. Finally, the postimplementation data only spans 4 months and a longer duration of time is needed to more accurately determine sustainability of renewal clinic interventions and provide comprehensive evaluation of cost-avoidance.

Conclusion

Implementation of an OAN renewal clinic was associated with an increase in MPR, improved proportion of patients considered adherent, and an estimated $36,335 cost-savings. However, prospective evaluation and a longer study duration are needed to determine causality of improved adherence and cost-savings associated with a pharmacist-driven OAN renewal clinic.

More than 70% of Americans are overweight or obese and 1 in 10 has type 2 diabetes mellitus (T2DM). In the last 20 years, the prevalence of obesity and DM has each increased drastically according to the Centers for Disease Control and Prevention.^1,2 Thus, an increase in severe insulin-resistant DM is predicted. Severe insulin resistance occurs when insulin doses exceed 200 units per day or 2 units/kg per day.^3-5 Treating this condition demands large volumes of U-100 insulin and a high frequency of injections (usually 4-7 per day), which can lead to reduced patient adherence.^8-10 Likewise, large injected volumes are more painful and can lead to altered absorption.^3,9-11

U-500 insulin (500 units/mL) is 5 times more concentrated than U-100 insulin and has advantages in the management of severe insulin-resistant DM.^11-13 Its pharmacokinetic profile is unique, for the clinical effect can last for up to 24 hours.^4-6 U-500 can replace basal-bolus and other complex insulin regimens, offering convenient, effective glycemic control with 2 or 3 injections per day.^11,14-20 U-500 can also improve the quality of life and adherence compared with formulations that require more frequent injections.^7,14,21 Historically, only exceptional or “special” cases were treated with U-500, but demand for concentrated insulins has increased in the last decade as clinicians adjust their care for this growing patient population.¹⁷

The purpose of this study was to determine whether a population of subjects with severe insulin-resistant T2DM would benefit from the use of U-500 vs U-100 insulin regimens. The hypothesis was that this population would obtain equal or better glycemic control while achieving improved adherence. Other studies have demonstrated that U-500 yields improvements in glycemic control but also potentially increases hypoglycemic episodes.^15-18,22-24 To our knowledge, this study is the first to evaluate the clinical outcomes of subjects with severe insulin-resistant T2DM who changed from U-100 to U-500 vs subjects who remained on high-dose U-100 insulin.

Methods

This was a single-site, retrospective chart review of subjects with T2DM who attended the endocrinology specialty clinic at the James A. Haley Veterans’ Hospital (JAHVA) in Tampa, Florida, between July 2002 and June 2011. The study included a group of subjects using U-500 insulin and a comparison group using U-100 insulin. The study was approved by the JAHVA Research & Development Committee and by the University of South Florida Institutional Review Board.

Inclusion criteria included diagnosis of T2DM, body mass index (BMI) of more than 30, use of U-500 insulin, or > 200 units daily of U-100 insulin. Exclusion criteria included hypoglycemia unawareness, type 1 DM, and use of an insulin pump. A total of 142 subjects met the inclusion criteria (68 in the U-500 group and 74 in the U-100 group).

All study subjects had at least 1 DM education session. U-500 subjects used insulin vials and 1-mL volumetric hypodermal syringes. All U-500 prescriptions were issued electronically in units and volume (U-500 insulin was available exclusively in vials during the time frame from which data were collected). Subjects in the U-100 group used insulin vials or pen devices. Laboratory studies were processed in house by the institution using high-pressure liquid chromatography to determine hemoglobin A_1C (Hb A_1C) levels. All study subjects required at least 2 Hb A_1C measurements over the observed 12 months for inclusion.

Transition to U-500 Insulin

U-500 transition was considered routinely and presented as an option for patients requiring > 200 units of insulin daily. The transition criteria included adherence to medications, follow-up appointments, and glucose monitoring recommendations, and ability to learn and apply insulin self-adjustment instructions. All subjects were given an additional U-500 insulin education session before transition. The endocrinologist calculated all starting doses by reducing the total daily dose by 20%.

Data Collection

Data were collected using the automatic data mining tools within the JAHVA Computerized Patient Record System and confirmed individually by clinical staff. Demographic data included age, race, and sex. Other parameters were weight; BMI; Hb A_1C; estimated glomerular filtration rate (eGFR); duration of DM; use of metformin and other oral agents; total daily insulin dose; number of daily injections; prior history of atherosclerotic cardiovascular disease (ASCVD), including coronary artery disease (CAD), cerebrovascular accident (CVA), or peripheral vascular disease (PVD); occurrence of severe hypoglycemia (symptomatic hypoglycemia requiring treatment assistance from another individual) and of new cardiovascular events, classified as CAD, CVA, or PVD.

For the U-500 group, data were collected and analyzed for the 3 months before (baseline) and the 12 months after the initiation of concentrated insulin. For the U-100 group, data were collected and analyzed for the comparable 3 months before (baseline) and the 12 months after the first clinic visit in which the subject started using more than 200 units per day of U-100. Frequency of follow-up visits was individualized according to clinical needs.

Clinical Endpoints

Primary outcomes included changes in Hb A_1C from baseline to the following 12 months, and the occurrence of severe hypoglycemia. Secondary outcomes included the occurrence of new ASCVD events during the study, and changes in weight, BMI, and number of injections.

Statistical Analysis

A descriptive analysis was applied to the categorical variables using absolute and relative frequencies. For continuous variables, mean and SD, or median and interquartile range, according to the distribution were calculated. Differences in baseline characteristics between groups were determined using chi-square and t test.

The primary and secondary outcomes were assessed through univariate and multivariate general linear models. Multivariate models were used to compare differences in the variation of Hb A_1C over time. Data were incomplete for the Hb A_1C in 27 subjects, 6% of the dataset (Each subject had more than one variable or observation). Therefore, a multiple imputation was used to account for the incompleteness on Hb A_1C (value substitutions by the mean and by the prior Hb A_1C and models were balanced against the unaltered data). A P value of ≤ .05 was used to determine statistical significance. The statistical analyses were performed using IBM SPSS Statistics 21.

Results

Most patients were male (94%) of white race (86%), with a mean age of 57 years and comparable duration of DM (Table 1). Demographics were balanced between the groups, except for weight and BMI, both higher in the U-500 group (P < .001). Use of oral antidiabetic agents was not significantly different between groups, nor were comorbid conditions, with nearly 50% of subjects in each group affected by CKD and ASCVD, of which CAD was the most common (approximately 40% of both groups). Only about one-third of subjects used metformin and/or other oral agents, likely due to the high prevalence of CKD (contraindicating metformin) and high insulin requirements (due to correlation with β cell failure). A subgroup analysis of subjects on metformin did not demonstrate significant differences in risk of severe hypoglycemia or in Hb A_1C levels (data not shown).

Both groups had similar initial Hb A_1C baselines (> 9%) and both improved glycemic control during the study period. However, the Hb A_1C reduction was greater in the U-500 group (P= .034), 0.84% vs 0.56% for U-100 and the between-groups difference was 0.4%. (Figure 1, Tables 2 and 3).

The univariate general linear model shows a statistically significant difference in the levels of Hb A_1C within each treatment group, regardless of the imputation strategy. However, the differences were not significant when comparing postintervention Hb A_1C means between groups with unaltered data (P = .23), because the U-500 group Hb A_1C improvement gap narrowed at the end of study. In the multivariate analysis, irrespective of imputation method, the differences in Hb A_1C between group treated with U-100 and U-500 were statistically significant (Table 3).

Overall, more subjects in the U-500 group than in the U-100 group achieved Hb A_1C levels < 8.5% (56% vs 46%, respectively, P = .003) and the proportion of subjects achieving Hb A_1C levels < 7.5% doubled that of the U-100 group (26% vs 12%; Figure 2). Five subjects in the U-500 group experienced severe hypoglycemia, compared with 1 in the U-100 group (P = .08). The total daily insulin dose was significantly higher in the U-500 group (296 units daily) than in the U-100 group (209 units daily) (P < .001) (Table 2). Baseline weight and BMI differences were also significant for the U-500 and U-100 groups (P < .001). Weight gain of approximately 2 kg occurred in both groups, a change that was not statistically significant (P = .79)

Discussion

The purpose of the study was to compare subjects with obesity and T2DM using U-500 concentrated insulin with similarly matched subjects using U-100 insulin. Available studies using U-500 insulin, including prospective trials, have reported the experience after transitioning patients who “failed” U-100 regimens.^{13-16,18,21-24} This failure is a relative and transient condition that, in theory, could be improved with medical intervention and lifestyle changes. Such changes cannot be easily quantified in a clinical trial or retrospective study without a control group. This study was an attempt to fill this knowledge gap.

The U-500 intervention resulted in a 0.8% overall reduction in Hb A_1C and a significant 0.4% reduction compared to subjects using U-100. While both groups had improvement in Hb A_1C , U-500 was associated with superior reductions in Hb A_1C . This finding confirms prior assertions that U-500, compared with U-100, is associated with larger Hb A_1C improvement.^14-16

The preintervention and postintervention Hb A_1C means were > 8% in both groups. This finding suggests that lowering Hb A_1C is challenging, similar to published results demonstrating that Hb A_1C levels < 7% are achieved by fewer than one-third of U-500 users.^16-18 The explanation for this finding remains elusive, due to the methodologic limitations of a retrospective analysis. A possible explanation is the high prevalence of CKD and ASCVD among the study population, conditions which, according to guidelines justify less aggressive glycemic control efforts.²⁵ Multiple prior studies using retrospective data^8,13-16 and 2 prospective trials^18,22 demonstrated similar Hb A_1C reductions after failure of U-100 regimens.

In this study, U-500 resulted in a nominal increase in the risk of severe hypoglycemic episodes. A detailed review of the events found that most of these patients had preestablished CKD and ASCVD, and half of the subjects with sever hypoglycemic episodes had new vascular events during the study (Appendix). These findings suggest a possible correlation between CKD and ASCVD complications and the risk of severe hypoglycemic events. Pharmacokinetic profiles for U-500 have not been studied in subjects with CKD, but the clinical effect of CKD is likely prolonged by the expected reduction in insulin clearance. Similarly, the frailty associated with preexisting ASCVD, or the related polypharmacy, could be factors increasing the risk of hypoglycemia and deserve further study.

Most of the U-500 subjects used it twice daily in this study, which could have contributed to the higher hypoglycemia rate. In a prospective randomized trial Hood and colleagues reported a rate of symptomatic hypoglycemia exceeding 90% in the 2 study groups, and 8 subjects (of 325 total) had severe hypoglycemia during the 6-month observation. The group assigned to 2 daily injections had a significantly higher rate of hypoglycemic events compared with a group that had 3 injections per day.¹⁸ Additional studies are required to ascertain whether U-500, compared with specific U-100 regimens (basal-bolus vs premixed; human vs insulin analogs), results in a higher risk of severe hypoglycemia.

This study also investigated the incidence of new cardiovascular events, and no difference was found between the 2 groups. A longer observation would be required to better assess whether U-500 therapy can reduce the incidence of microvascular and macrovascular complications. The similar incidence of complications is further evidence of the similarity between the 2 studied groups. It was also reassuring to find that weight gains were small and nearly identical in both insulin groups.

Strengths and Limitations

This study has several limitations. Data about hospitalizations for congestive heart failure, amputations, progression of diabetic retinopathy, neuropathy, and nephropathy were not collected for this analysis. As both groups of subjects were relatively small, statistical power to assess outcomes is a concern. Retrospective chart reviews may also be affected by incomplete data collections and multiple biases. No data were available for other hypoglycemic episodes, especially to calculate the rate of the more common forms of hypoglycemia. The period of data analyzed spanned only about 15 months. A longer, longitudinal assessment of the differences between these 2 groups may yield more differences, and clearer results and conclusions. Moreover, the data set had aged before publication of this report; however, the authors think that the analysis and information remain highly clinically relevant. The uncommon use of U-500, and prominence as a “special case” insulin may also lead to a detection bias for severe hypoglycemia in the U-500 group. In contrast, lapses in documentation of hypoglycemia in subjects using U-100 could have occurred. Finally, the differences in total daily dose and body weight among groups were significant and may reflect on important physiologic differences between the 2 groups that may affect the reproducibility of our results.

Nevertheless, this study had notable strengths. Comparing U-500 insulin users with similar subjects using U-100 over a period of time provides head-to-head data with potentially important clinical utility. Also, we collected and analyzed a sizable number of clinically important variables, including cardiovascular risk factors, the occurrence of new cardiovascular events, and prevalence of renal disease. The use of linear regression and multivariate analysis using multiple models also strengthened the results. Previous studies compared the outcomes in subjects using U-500 insulin with only their historical selves.^{8,13-16,18,19,22-25} Therefore, these studies analyzed the data for preconversion and postconversion of U-500 only and consistently favored U-500. This design in a retrospective study cannot eliminate the selection and/or intervention biases, as the subjects of study had inevitably “failed” prior therapies. Similarly, there is no prospective clinical trial data comparing patients on U-500 with patients on high doses of U-100 insulin. Finally, the patients in our study had high rates of comorbidities, which may have increased the applicability of our results to those of “real-life” patients in the community. To our knowledge, no other study has attempted a similar study design approach either prospectively or retrospectively.

Conclusions

In this population of elderly veterans with severely insulin-resistant T2DM, with a high incidence of CKD and ASCVD, U-500 insulin was associated with significantly greater reductions in Hb A_1C than U-100 insulin-based regimens, while requiring fewer injections. No difference was noted in the incidence of new ASCVD events. More studies are needed to assess whether U-500 may increase the risk of severe hypoglycemic episodes.

Acknowledgments

The authors recognize the invaluable help provided by the editorial staff of University of South Florida IMpact, the Intramural Review to Support Research and Scientific Publication, and especially to Richard F. Lockey, MD, who has mentored us in this beautiful journey of scientific writing and for his editorial assistance. A portion of this study preliminary data was presented as an abstract at ENDO 2013, The Endocrine Society Annual meeting in San Francisco, CA, June 15-18, 2013.

Appendix. Severe Hypoglycemic Events

Subject 1: U-500 user, 61-year-old African American male. Hypoglycemia occurred during fasting and was associated with a seizure-like event 9 months after transition to concentrated insulin. He was taken by ambulance to a local hospital. No additional data were obtained. Hb A_1C was 8.2% in the month before the episode (lowest of the studied period) and increased to 9.1% in the last segment of the study.

Subject 2: U-500 user, 57-year-old white male. The severe hypoglycemic episode occurred approximately 8 months after transition. His Hb A_1C was 5.6% around the time of the event, the lowest of the studied period, and increased to 6.8% over the next 4 months. No other data were available.

Subject 3: U-500 user, 67-year-old white male. The event occurred at home in the morning while fasting, 3 months after transition. He was assisted by his family. Hb A_1C was 7.1% 10 weeks after the event and was 7% at the end of the studied period. He had a history of CKD and PVD.

Subject 4: U-500 user, 68-year-old white male. He presented with altered consciousness, hypoglycemia, and elevated troponin levels, which was later confirmed as a non-ST elevation myocardial infarction (NSTEMI), 7 months after transition. Hb A_1C during the events was 7.1% and was followed by a 9.3% level 9 weeks later. He had history of CKD and PVD.

Subject 5: U-500 user, 67-year-old white man. Hypoglycemia occurred 6 months after transition to U-500. Hb A_1C was 8.4% 2 months prior, and was followed by a 7% during the admission for severe hypoglycemia. 3 months later, his HbA1c rose to 8.2%. He had an extensive history of CAD and had a NSTEMI during the study period.

Subject 6: U-100 user, 65-year-old white man. He was found unconscious in the morning while fasting, 6 months after his first clinic visit. He had CKD and advanced ASCVD with prior CAD, PVD, and CVA. He had also had a recent CVA that had affected his movement and cognition.

More than 70% of Americans are overweight or obese and 1 in 10 has type 2 diabetes mellitus (T2DM). In the last 20 years, the prevalence of obesity and DM has each increased drastically according to the Centers for Disease Control and Prevention.^1,2 Thus, an increase in severe insulin-resistant DM is predicted. Severe insulin resistance occurs when insulin doses exceed 200 units per day or 2 units/kg per day.^3-5 Treating this condition demands large volumes of U-100 insulin and a high frequency of injections (usually 4-7 per day), which can lead to reduced patient adherence.^8-10 Likewise, large injected volumes are more painful and can lead to altered absorption.^3,9-11

U-500 insulin (500 units/mL) is 5 times more concentrated than U-100 insulin and has advantages in the management of severe insulin-resistant DM.^11-13 Its pharmacokinetic profile is unique, for the clinical effect can last for up to 24 hours.^4-6 U-500 can replace basal-bolus and other complex insulin regimens, offering convenient, effective glycemic control with 2 or 3 injections per day.^11,14-20 U-500 can also improve the quality of life and adherence compared with formulations that require more frequent injections.^7,14,21 Historically, only exceptional or “special” cases were treated with U-500, but demand for concentrated insulins has increased in the last decade as clinicians adjust their care for this growing patient population.¹⁷

The purpose of this study was to determine whether a population of subjects with severe insulin-resistant T2DM would benefit from the use of U-500 vs U-100 insulin regimens. The hypothesis was that this population would obtain equal or better glycemic control while achieving improved adherence. Other studies have demonstrated that U-500 yields improvements in glycemic control but also potentially increases hypoglycemic episodes.^15-18,22-24 To our knowledge, this study is the first to evaluate the clinical outcomes of subjects with severe insulin-resistant T2DM who changed from U-100 to U-500 vs subjects who remained on high-dose U-100 insulin.

Methods

This was a single-site, retrospective chart review of subjects with T2DM who attended the endocrinology specialty clinic at the James A. Haley Veterans’ Hospital (JAHVA) in Tampa, Florida, between July 2002 and June 2011. The study included a group of subjects using U-500 insulin and a comparison group using U-100 insulin. The study was approved by the JAHVA Research & Development Committee and by the University of South Florida Institutional Review Board.

Inclusion criteria included diagnosis of T2DM, body mass index (BMI) of more than 30, use of U-500 insulin, or > 200 units daily of U-100 insulin. Exclusion criteria included hypoglycemia unawareness, type 1 DM, and use of an insulin pump. A total of 142 subjects met the inclusion criteria (68 in the U-500 group and 74 in the U-100 group).

All study subjects had at least 1 DM education session. U-500 subjects used insulin vials and 1-mL volumetric hypodermal syringes. All U-500 prescriptions were issued electronically in units and volume (U-500 insulin was available exclusively in vials during the time frame from which data were collected). Subjects in the U-100 group used insulin vials or pen devices. Laboratory studies were processed in house by the institution using high-pressure liquid chromatography to determine hemoglobin A_1C (Hb A_1C) levels. All study subjects required at least 2 Hb A_1C measurements over the observed 12 months for inclusion.

Transition to U-500 Insulin

U-500 transition was considered routinely and presented as an option for patients requiring > 200 units of insulin daily. The transition criteria included adherence to medications, follow-up appointments, and glucose monitoring recommendations, and ability to learn and apply insulin self-adjustment instructions. All subjects were given an additional U-500 insulin education session before transition. The endocrinologist calculated all starting doses by reducing the total daily dose by 20%.

Data Collection

Data were collected using the automatic data mining tools within the JAHVA Computerized Patient Record System and confirmed individually by clinical staff. Demographic data included age, race, and sex. Other parameters were weight; BMI; Hb A_1C; estimated glomerular filtration rate (eGFR); duration of DM; use of metformin and other oral agents; total daily insulin dose; number of daily injections; prior history of atherosclerotic cardiovascular disease (ASCVD), including coronary artery disease (CAD), cerebrovascular accident (CVA), or peripheral vascular disease (PVD); occurrence of severe hypoglycemia (symptomatic hypoglycemia requiring treatment assistance from another individual) and of new cardiovascular events, classified as CAD, CVA, or PVD.

For the U-500 group, data were collected and analyzed for the 3 months before (baseline) and the 12 months after the initiation of concentrated insulin. For the U-100 group, data were collected and analyzed for the comparable 3 months before (baseline) and the 12 months after the first clinic visit in which the subject started using more than 200 units per day of U-100. Frequency of follow-up visits was individualized according to clinical needs.

Clinical Endpoints

Primary outcomes included changes in Hb A_1C from baseline to the following 12 months, and the occurrence of severe hypoglycemia. Secondary outcomes included the occurrence of new ASCVD events during the study, and changes in weight, BMI, and number of injections.

Statistical Analysis

A descriptive analysis was applied to the categorical variables using absolute and relative frequencies. For continuous variables, mean and SD, or median and interquartile range, according to the distribution were calculated. Differences in baseline characteristics between groups were determined using chi-square and t test.

The primary and secondary outcomes were assessed through univariate and multivariate general linear models. Multivariate models were used to compare differences in the variation of Hb A_1C over time. Data were incomplete for the Hb A_1C in 27 subjects, 6% of the dataset (Each subject had more than one variable or observation). Therefore, a multiple imputation was used to account for the incompleteness on Hb A_1C (value substitutions by the mean and by the prior Hb A_1C and models were balanced against the unaltered data). A P value of ≤ .05 was used to determine statistical significance. The statistical analyses were performed using IBM SPSS Statistics 21.

Results

Most patients were male (94%) of white race (86%), with a mean age of 57 years and comparable duration of DM (Table 1). Demographics were balanced between the groups, except for weight and BMI, both higher in the U-500 group (P < .001). Use of oral antidiabetic agents was not significantly different between groups, nor were comorbid conditions, with nearly 50% of subjects in each group affected by CKD and ASCVD, of which CAD was the most common (approximately 40% of both groups). Only about one-third of subjects used metformin and/or other oral agents, likely due to the high prevalence of CKD (contraindicating metformin) and high insulin requirements (due to correlation with β cell failure). A subgroup analysis of subjects on metformin did not demonstrate significant differences in risk of severe hypoglycemia or in Hb A_1C levels (data not shown).

Both groups had similar initial Hb A_1C baselines (> 9%) and both improved glycemic control during the study period. However, the Hb A_1C reduction was greater in the U-500 group (P= .034), 0.84% vs 0.56% for U-100 and the between-groups difference was 0.4%. (Figure 1, Tables 2 and 3).

The univariate general linear model shows a statistically significant difference in the levels of Hb A_1C within each treatment group, regardless of the imputation strategy. However, the differences were not significant when comparing postintervention Hb A_1C means between groups with unaltered data (P = .23), because the U-500 group Hb A_1C improvement gap narrowed at the end of study. In the multivariate analysis, irrespective of imputation method, the differences in Hb A_1C between group treated with U-100 and U-500 were statistically significant (Table 3).

Overall, more subjects in the U-500 group than in the U-100 group achieved Hb A_1C levels < 8.5% (56% vs 46%, respectively, P = .003) and the proportion of subjects achieving Hb A_1C levels < 7.5% doubled that of the U-100 group (26% vs 12%; Figure 2). Five subjects in the U-500 group experienced severe hypoglycemia, compared with 1 in the U-100 group (P = .08). The total daily insulin dose was significantly higher in the U-500 group (296 units daily) than in the U-100 group (209 units daily) (P < .001) (Table 2). Baseline weight and BMI differences were also significant for the U-500 and U-100 groups (P < .001). Weight gain of approximately 2 kg occurred in both groups, a change that was not statistically significant (P = .79)

Discussion

The purpose of the study was to compare subjects with obesity and T2DM using U-500 concentrated insulin with similarly matched subjects using U-100 insulin. Available studies using U-500 insulin, including prospective trials, have reported the experience after transitioning patients who “failed” U-100 regimens.^{13-16,18,21-24} This failure is a relative and transient condition that, in theory, could be improved with medical intervention and lifestyle changes. Such changes cannot be easily quantified in a clinical trial or retrospective study without a control group. This study was an attempt to fill this knowledge gap.

The U-500 intervention resulted in a 0.8% overall reduction in Hb A_1C and a significant 0.4% reduction compared to subjects using U-100. While both groups had improvement in Hb A_1C , U-500 was associated with superior reductions in Hb A_1C . This finding confirms prior assertions that U-500, compared with U-100, is associated with larger Hb A_1C improvement.^14-16

The preintervention and postintervention Hb A_1C means were > 8% in both groups. This finding suggests that lowering Hb A_1C is challenging, similar to published results demonstrating that Hb A_1C levels < 7% are achieved by fewer than one-third of U-500 users.^16-18 The explanation for this finding remains elusive, due to the methodologic limitations of a retrospective analysis. A possible explanation is the high prevalence of CKD and ASCVD among the study population, conditions which, according to guidelines justify less aggressive glycemic control efforts.²⁵ Multiple prior studies using retrospective data^8,13-16 and 2 prospective trials^18,22 demonstrated similar Hb A_1C reductions after failure of U-100 regimens.

In this study, U-500 resulted in a nominal increase in the risk of severe hypoglycemic episodes. A detailed review of the events found that most of these patients had preestablished CKD and ASCVD, and half of the subjects with sever hypoglycemic episodes had new vascular events during the study (Appendix). These findings suggest a possible correlation between CKD and ASCVD complications and the risk of severe hypoglycemic events. Pharmacokinetic profiles for U-500 have not been studied in subjects with CKD, but the clinical effect of CKD is likely prolonged by the expected reduction in insulin clearance. Similarly, the frailty associated with preexisting ASCVD, or the related polypharmacy, could be factors increasing the risk of hypoglycemia and deserve further study.

Most of the U-500 subjects used it twice daily in this study, which could have contributed to the higher hypoglycemia rate. In a prospective randomized trial Hood and colleagues reported a rate of symptomatic hypoglycemia exceeding 90% in the 2 study groups, and 8 subjects (of 325 total) had severe hypoglycemia during the 6-month observation. The group assigned to 2 daily injections had a significantly higher rate of hypoglycemic events compared with a group that had 3 injections per day.¹⁸ Additional studies are required to ascertain whether U-500, compared with specific U-100 regimens (basal-bolus vs premixed; human vs insulin analogs), results in a higher risk of severe hypoglycemia.

This study also investigated the incidence of new cardiovascular events, and no difference was found between the 2 groups. A longer observation would be required to better assess whether U-500 therapy can reduce the incidence of microvascular and macrovascular complications. The similar incidence of complications is further evidence of the similarity between the 2 studied groups. It was also reassuring to find that weight gains were small and nearly identical in both insulin groups.

Strengths and Limitations

This study has several limitations. Data about hospitalizations for congestive heart failure, amputations, progression of diabetic retinopathy, neuropathy, and nephropathy were not collected for this analysis. As both groups of subjects were relatively small, statistical power to assess outcomes is a concern. Retrospective chart reviews may also be affected by incomplete data collections and multiple biases. No data were available for other hypoglycemic episodes, especially to calculate the rate of the more common forms of hypoglycemia. The period of data analyzed spanned only about 15 months. A longer, longitudinal assessment of the differences between these 2 groups may yield more differences, and clearer results and conclusions. Moreover, the data set had aged before publication of this report; however, the authors think that the analysis and information remain highly clinically relevant. The uncommon use of U-500, and prominence as a “special case” insulin may also lead to a detection bias for severe hypoglycemia in the U-500 group. In contrast, lapses in documentation of hypoglycemia in subjects using U-100 could have occurred. Finally, the differences in total daily dose and body weight among groups were significant and may reflect on important physiologic differences between the 2 groups that may affect the reproducibility of our results.

Nevertheless, this study had notable strengths. Comparing U-500 insulin users with similar subjects using U-100 over a period of time provides head-to-head data with potentially important clinical utility. Also, we collected and analyzed a sizable number of clinically important variables, including cardiovascular risk factors, the occurrence of new cardiovascular events, and prevalence of renal disease. The use of linear regression and multivariate analysis using multiple models also strengthened the results. Previous studies compared the outcomes in subjects using U-500 insulin with only their historical selves.^{8,13-16,18,19,22-25} Therefore, these studies analyzed the data for preconversion and postconversion of U-500 only and consistently favored U-500. This design in a retrospective study cannot eliminate the selection and/or intervention biases, as the subjects of study had inevitably “failed” prior therapies. Similarly, there is no prospective clinical trial data comparing patients on U-500 with patients on high doses of U-100 insulin. Finally, the patients in our study had high rates of comorbidities, which may have increased the applicability of our results to those of “real-life” patients in the community. To our knowledge, no other study has attempted a similar study design approach either prospectively or retrospectively.

Conclusions

In this population of elderly veterans with severely insulin-resistant T2DM, with a high incidence of CKD and ASCVD, U-500 insulin was associated with significantly greater reductions in Hb A_1C than U-100 insulin-based regimens, while requiring fewer injections. No difference was noted in the incidence of new ASCVD events. More studies are needed to assess whether U-500 may increase the risk of severe hypoglycemic episodes.

Acknowledgments

The authors recognize the invaluable help provided by the editorial staff of University of South Florida IMpact, the Intramural Review to Support Research and Scientific Publication, and especially to Richard F. Lockey, MD, who has mentored us in this beautiful journey of scientific writing and for his editorial assistance. A portion of this study preliminary data was presented as an abstract at ENDO 2013, The Endocrine Society Annual meeting in San Francisco, CA, June 15-18, 2013.

Appendix. Severe Hypoglycemic Events

Subject 1: U-500 user, 61-year-old African American male. Hypoglycemia occurred during fasting and was associated with a seizure-like event 9 months after transition to concentrated insulin. He was taken by ambulance to a local hospital. No additional data were obtained. Hb A_1C was 8.2% in the month before the episode (lowest of the studied period) and increased to 9.1% in the last segment of the study.

Subject 2: U-500 user, 57-year-old white male. The severe hypoglycemic episode occurred approximately 8 months after transition. His Hb A_1C was 5.6% around the time of the event, the lowest of the studied period, and increased to 6.8% over the next 4 months. No other data were available.

Subject 3: U-500 user, 67-year-old white male. The event occurred at home in the morning while fasting, 3 months after transition. He was assisted by his family. Hb A_1C was 7.1% 10 weeks after the event and was 7% at the end of the studied period. He had a history of CKD and PVD.

Subject 4: U-500 user, 68-year-old white male. He presented with altered consciousness, hypoglycemia, and elevated troponin levels, which was later confirmed as a non-ST elevation myocardial infarction (NSTEMI), 7 months after transition. Hb A_1C during the events was 7.1% and was followed by a 9.3% level 9 weeks later. He had history of CKD and PVD.

Subject 5: U-500 user, 67-year-old white man. Hypoglycemia occurred 6 months after transition to U-500. Hb A_1C was 8.4% 2 months prior, and was followed by a 7% during the admission for severe hypoglycemia. 3 months later, his HbA1c rose to 8.2%. He had an extensive history of CAD and had a NSTEMI during the study period.

Subject 6: U-100 user, 65-year-old white man. He was found unconscious in the morning while fasting, 6 months after his first clinic visit. He had CKD and advanced ASCVD with prior CAD, PVD, and CVA. He had also had a recent CVA that had affected his movement and cognition.

More than 70% of Americans are overweight or obese and 1 in 10 has type 2 diabetes mellitus (T2DM). In the last 20 years, the prevalence of obesity and DM has each increased drastically according to the Centers for Disease Control and Prevention.^1,2 Thus, an increase in severe insulin-resistant DM is predicted. Severe insulin resistance occurs when insulin doses exceed 200 units per day or 2 units/kg per day.^3-5 Treating this condition demands large volumes of U-100 insulin and a high frequency of injections (usually 4-7 per day), which can lead to reduced patient adherence.^8-10 Likewise, large injected volumes are more painful and can lead to altered absorption.^3,9-11

U-500 insulin (500 units/mL) is 5 times more concentrated than U-100 insulin and has advantages in the management of severe insulin-resistant DM.^11-13 Its pharmacokinetic profile is unique, for the clinical effect can last for up to 24 hours.^4-6 U-500 can replace basal-bolus and other complex insulin regimens, offering convenient, effective glycemic control with 2 or 3 injections per day.^11,14-20 U-500 can also improve the quality of life and adherence compared with formulations that require more frequent injections.^7,14,21 Historically, only exceptional or “special” cases were treated with U-500, but demand for concentrated insulins has increased in the last decade as clinicians adjust their care for this growing patient population.¹⁷

The purpose of this study was to determine whether a population of subjects with severe insulin-resistant T2DM would benefit from the use of U-500 vs U-100 insulin regimens. The hypothesis was that this population would obtain equal or better glycemic control while achieving improved adherence. Other studies have demonstrated that U-500 yields improvements in glycemic control but also potentially increases hypoglycemic episodes.^15-18,22-24 To our knowledge, this study is the first to evaluate the clinical outcomes of subjects with severe insulin-resistant T2DM who changed from U-100 to U-500 vs subjects who remained on high-dose U-100 insulin.

Methods

This was a single-site, retrospective chart review of subjects with T2DM who attended the endocrinology specialty clinic at the James A. Haley Veterans’ Hospital (JAHVA) in Tampa, Florida, between July 2002 and June 2011. The study included a group of subjects using U-500 insulin and a comparison group using U-100 insulin. The study was approved by the JAHVA Research & Development Committee and by the University of South Florida Institutional Review Board.

Inclusion criteria included diagnosis of T2DM, body mass index (BMI) of more than 30, use of U-500 insulin, or > 200 units daily of U-100 insulin. Exclusion criteria included hypoglycemia unawareness, type 1 DM, and use of an insulin pump. A total of 142 subjects met the inclusion criteria (68 in the U-500 group and 74 in the U-100 group).

All study subjects had at least 1 DM education session. U-500 subjects used insulin vials and 1-mL volumetric hypodermal syringes. All U-500 prescriptions were issued electronically in units and volume (U-500 insulin was available exclusively in vials during the time frame from which data were collected). Subjects in the U-100 group used insulin vials or pen devices. Laboratory studies were processed in house by the institution using high-pressure liquid chromatography to determine hemoglobin A_1C (Hb A_1C) levels. All study subjects required at least 2 Hb A_1C measurements over the observed 12 months for inclusion.

Transition to U-500 Insulin

U-500 transition was considered routinely and presented as an option for patients requiring > 200 units of insulin daily. The transition criteria included adherence to medications, follow-up appointments, and glucose monitoring recommendations, and ability to learn and apply insulin self-adjustment instructions. All subjects were given an additional U-500 insulin education session before transition. The endocrinologist calculated all starting doses by reducing the total daily dose by 20%.

Data Collection

Data were collected using the automatic data mining tools within the JAHVA Computerized Patient Record System and confirmed individually by clinical staff. Demographic data included age, race, and sex. Other parameters were weight; BMI; Hb A_1C; estimated glomerular filtration rate (eGFR); duration of DM; use of metformin and other oral agents; total daily insulin dose; number of daily injections; prior history of atherosclerotic cardiovascular disease (ASCVD), including coronary artery disease (CAD), cerebrovascular accident (CVA), or peripheral vascular disease (PVD); occurrence of severe hypoglycemia (symptomatic hypoglycemia requiring treatment assistance from another individual) and of new cardiovascular events, classified as CAD, CVA, or PVD.

For the U-500 group, data were collected and analyzed for the 3 months before (baseline) and the 12 months after the initiation of concentrated insulin. For the U-100 group, data were collected and analyzed for the comparable 3 months before (baseline) and the 12 months after the first clinic visit in which the subject started using more than 200 units per day of U-100. Frequency of follow-up visits was individualized according to clinical needs.

Clinical Endpoints

Primary outcomes included changes in Hb A_1C from baseline to the following 12 months, and the occurrence of severe hypoglycemia. Secondary outcomes included the occurrence of new ASCVD events during the study, and changes in weight, BMI, and number of injections.

Statistical Analysis

A descriptive analysis was applied to the categorical variables using absolute and relative frequencies. For continuous variables, mean and SD, or median and interquartile range, according to the distribution were calculated. Differences in baseline characteristics between groups were determined using chi-square and t test.

The primary and secondary outcomes were assessed through univariate and multivariate general linear models. Multivariate models were used to compare differences in the variation of Hb A_1C over time. Data were incomplete for the Hb A_1C in 27 subjects, 6% of the dataset (Each subject had more than one variable or observation). Therefore, a multiple imputation was used to account for the incompleteness on Hb A_1C (value substitutions by the mean and by the prior Hb A_1C and models were balanced against the unaltered data). A P value of ≤ .05 was used to determine statistical significance. The statistical analyses were performed using IBM SPSS Statistics 21.

Results

Most patients were male (94%) of white race (86%), with a mean age of 57 years and comparable duration of DM (Table 1). Demographics were balanced between the groups, except for weight and BMI, both higher in the U-500 group (P < .001). Use of oral antidiabetic agents was not significantly different between groups, nor were comorbid conditions, with nearly 50% of subjects in each group affected by CKD and ASCVD, of which CAD was the most common (approximately 40% of both groups). Only about one-third of subjects used metformin and/or other oral agents, likely due to the high prevalence of CKD (contraindicating metformin) and high insulin requirements (due to correlation with β cell failure). A subgroup analysis of subjects on metformin did not demonstrate significant differences in risk of severe hypoglycemia or in Hb A_1C levels (data not shown).

Both groups had similar initial Hb A_1C baselines (> 9%) and both improved glycemic control during the study period. However, the Hb A_1C reduction was greater in the U-500 group (P= .034), 0.84% vs 0.56% for U-100 and the between-groups difference was 0.4%. (Figure 1, Tables 2 and 3).

The univariate general linear model shows a statistically significant difference in the levels of Hb A_1C within each treatment group, regardless of the imputation strategy. However, the differences were not significant when comparing postintervention Hb A_1C means between groups with unaltered data (P = .23), because the U-500 group Hb A_1C improvement gap narrowed at the end of study. In the multivariate analysis, irrespective of imputation method, the differences in Hb A_1C between group treated with U-100 and U-500 were statistically significant (Table 3).

Overall, more subjects in the U-500 group than in the U-100 group achieved Hb A_1C levels < 8.5% (56% vs 46%, respectively, P = .003) and the proportion of subjects achieving Hb A_1C levels < 7.5% doubled that of the U-100 group (26% vs 12%; Figure 2). Five subjects in the U-500 group experienced severe hypoglycemia, compared with 1 in the U-100 group (P = .08). The total daily insulin dose was significantly higher in the U-500 group (296 units daily) than in the U-100 group (209 units daily) (P < .001) (Table 2). Baseline weight and BMI differences were also significant for the U-500 and U-100 groups (P < .001). Weight gain of approximately 2 kg occurred in both groups, a change that was not statistically significant (P = .79)

Discussion

The purpose of the study was to compare subjects with obesity and T2DM using U-500 concentrated insulin with similarly matched subjects using U-100 insulin. Available studies using U-500 insulin, including prospective trials, have reported the experience after transitioning patients who “failed” U-100 regimens.^{13-16,18,21-24} This failure is a relative and transient condition that, in theory, could be improved with medical intervention and lifestyle changes. Such changes cannot be easily quantified in a clinical trial or retrospective study without a control group. This study was an attempt to fill this knowledge gap.

The U-500 intervention resulted in a 0.8% overall reduction in Hb A_1C and a significant 0.4% reduction compared to subjects using U-100. While both groups had improvement in Hb A_1C , U-500 was associated with superior reductions in Hb A_1C . This finding confirms prior assertions that U-500, compared with U-100, is associated with larger Hb A_1C improvement.^14-16

The preintervention and postintervention Hb A_1C means were > 8% in both groups. This finding suggests that lowering Hb A_1C is challenging, similar to published results demonstrating that Hb A_1C levels < 7% are achieved by fewer than one-third of U-500 users.^16-18 The explanation for this finding remains elusive, due to the methodologic limitations of a retrospective analysis. A possible explanation is the high prevalence of CKD and ASCVD among the study population, conditions which, according to guidelines justify less aggressive glycemic control efforts.²⁵ Multiple prior studies using retrospective data^8,13-16 and 2 prospective trials^18,22 demonstrated similar Hb A_1C reductions after failure of U-100 regimens.

In this study, U-500 resulted in a nominal increase in the risk of severe hypoglycemic episodes. A detailed review of the events found that most of these patients had preestablished CKD and ASCVD, and half of the subjects with sever hypoglycemic episodes had new vascular events during the study (Appendix). These findings suggest a possible correlation between CKD and ASCVD complications and the risk of severe hypoglycemic events. Pharmacokinetic profiles for U-500 have not been studied in subjects with CKD, but the clinical effect of CKD is likely prolonged by the expected reduction in insulin clearance. Similarly, the frailty associated with preexisting ASCVD, or the related polypharmacy, could be factors increasing the risk of hypoglycemia and deserve further study.

Most of the U-500 subjects used it twice daily in this study, which could have contributed to the higher hypoglycemia rate. In a prospective randomized trial Hood and colleagues reported a rate of symptomatic hypoglycemia exceeding 90% in the 2 study groups, and 8 subjects (of 325 total) had severe hypoglycemia during the 6-month observation. The group assigned to 2 daily injections had a significantly higher rate of hypoglycemic events compared with a group that had 3 injections per day.¹⁸ Additional studies are required to ascertain whether U-500, compared with specific U-100 regimens (basal-bolus vs premixed; human vs insulin analogs), results in a higher risk of severe hypoglycemia.

This study also investigated the incidence of new cardiovascular events, and no difference was found between the 2 groups. A longer observation would be required to better assess whether U-500 therapy can reduce the incidence of microvascular and macrovascular complications. The similar incidence of complications is further evidence of the similarity between the 2 studied groups. It was also reassuring to find that weight gains were small and nearly identical in both insulin groups.

Strengths and Limitations

This study has several limitations. Data about hospitalizations for congestive heart failure, amputations, progression of diabetic retinopathy, neuropathy, and nephropathy were not collected for this analysis. As both groups of subjects were relatively small, statistical power to assess outcomes is a concern. Retrospective chart reviews may also be affected by incomplete data collections and multiple biases. No data were available for other hypoglycemic episodes, especially to calculate the rate of the more common forms of hypoglycemia. The period of data analyzed spanned only about 15 months. A longer, longitudinal assessment of the differences between these 2 groups may yield more differences, and clearer results and conclusions. Moreover, the data set had aged before publication of this report; however, the authors think that the analysis and information remain highly clinically relevant. The uncommon use of U-500, and prominence as a “special case” insulin may also lead to a detection bias for severe hypoglycemia in the U-500 group. In contrast, lapses in documentation of hypoglycemia in subjects using U-100 could have occurred. Finally, the differences in total daily dose and body weight among groups were significant and may reflect on important physiologic differences between the 2 groups that may affect the reproducibility of our results.

Nevertheless, this study had notable strengths. Comparing U-500 insulin users with similar subjects using U-100 over a period of time provides head-to-head data with potentially important clinical utility. Also, we collected and analyzed a sizable number of clinically important variables, including cardiovascular risk factors, the occurrence of new cardiovascular events, and prevalence of renal disease. The use of linear regression and multivariate analysis using multiple models also strengthened the results. Previous studies compared the outcomes in subjects using U-500 insulin with only their historical selves.^{8,13-16,18,19,22-25} Therefore, these studies analyzed the data for preconversion and postconversion of U-500 only and consistently favored U-500. This design in a retrospective study cannot eliminate the selection and/or intervention biases, as the subjects of study had inevitably “failed” prior therapies. Similarly, there is no prospective clinical trial data comparing patients on U-500 with patients on high doses of U-100 insulin. Finally, the patients in our study had high rates of comorbidities, which may have increased the applicability of our results to those of “real-life” patients in the community. To our knowledge, no other study has attempted a similar study design approach either prospectively or retrospectively.

Conclusions

In this population of elderly veterans with severely insulin-resistant T2DM, with a high incidence of CKD and ASCVD, U-500 insulin was associated with significantly greater reductions in Hb A_1C than U-100 insulin-based regimens, while requiring fewer injections. No difference was noted in the incidence of new ASCVD events. More studies are needed to assess whether U-500 may increase the risk of severe hypoglycemic episodes.

Acknowledgments

The authors recognize the invaluable help provided by the editorial staff of University of South Florida IMpact, the Intramural Review to Support Research and Scientific Publication, and especially to Richard F. Lockey, MD, who has mentored us in this beautiful journey of scientific writing and for his editorial assistance. A portion of this study preliminary data was presented as an abstract at ENDO 2013, The Endocrine Society Annual meeting in San Francisco, CA, June 15-18, 2013.

Appendix. Severe Hypoglycemic Events

Subject 1: U-500 user, 61-year-old African American male. Hypoglycemia occurred during fasting and was associated with a seizure-like event 9 months after transition to concentrated insulin. He was taken by ambulance to a local hospital. No additional data were obtained. Hb A_1C was 8.2% in the month before the episode (lowest of the studied period) and increased to 9.1% in the last segment of the study.

Subject 2: U-500 user, 57-year-old white male. The severe hypoglycemic episode occurred approximately 8 months after transition. His Hb A_1C was 5.6% around the time of the event, the lowest of the studied period, and increased to 6.8% over the next 4 months. No other data were available.

Subject 3: U-500 user, 67-year-old white male. The event occurred at home in the morning while fasting, 3 months after transition. He was assisted by his family. Hb A_1C was 7.1% 10 weeks after the event and was 7% at the end of the studied period. He had a history of CKD and PVD.

Subject 4: U-500 user, 68-year-old white male. He presented with altered consciousness, hypoglycemia, and elevated troponin levels, which was later confirmed as a non-ST elevation myocardial infarction (NSTEMI), 7 months after transition. Hb A_1C during the events was 7.1% and was followed by a 9.3% level 9 weeks later. He had history of CKD and PVD.

Subject 5: U-500 user, 67-year-old white man. Hypoglycemia occurred 6 months after transition to U-500. Hb A_1C was 8.4% 2 months prior, and was followed by a 7% during the admission for severe hypoglycemia. 3 months later, his HbA1c rose to 8.2%. He had an extensive history of CAD and had a NSTEMI during the study period.

Subject 6: U-100 user, 65-year-old white man. He was found unconscious in the morning while fasting, 6 months after his first clinic visit. He had CKD and advanced ASCVD with prior CAD, PVD, and CVA. He had also had a recent CVA that had affected his movement and cognition.

A 2.4-mg weekly injection of the glucagon-like peptide-1 (GLP-1) receptor agonist semaglutide led to a clinically meaningful 5% loss in weight for roughly two-thirds of patients with both overweight/obesity and type 2 diabetes, researchers report.

These findings from the Semaglutide Treatment Effect in People With Obesity 2 (STEP 2) trial, one of four phase 3 trials of this drug, which is currently under regulatory review for weight loss, were published March 2 in The Lancet.

More than 1,000 patients (mean initial weight, 100 kg [220 pounds]) were randomly assigned to receive a lifestyle intervention plus a weekly injection of semaglutide 2.4 mg or semaglutide 1.0 mg or placebo. At 68 weeks, they had lost a mean of 9.6%, 7.0%, and 3.4%, respectively, of their starting weight.

In addition, 69% of patients who had received semaglutide 2.4 mg experienced a clinically meaningful 5% loss of weight, compared with 57% of patients who had received the lower dose and 29% of patients who had received placebo.

The higher dose of semaglutide was associated with a greater improvement in cardiometabolic risk factors. The safety profile was similar to that seen with other drugs in this class.
 

“By far the best results with any weight loss medicine in diabetes”

Importantly, “more than a quarter of participants lost over 15% of their body weight,” senior author Ildiko Lingvay, MD, stressed. This “is by far the best result we had with any weight loss medicine in patients with diabetes,” Dr. Lingvay, of the University of Texas, Dallas, said in a statement from the university.

Sara Freeman/MDedge News

“The drug works by suppressing appetite centers in the brain to reduce caloric intake,” she explained. “The medication continually tells the body that you just ate, you’re full.”

Similarly, lead author Melanie J. Davies, MD, said that the STEP 2 results “are exciting and represent a new era in weight management in people with type 2 diabetes.

Sara Freeman/MDedge News

One of four trials under review

More than 90% of people with type 2 diabetes are overweight or have obesity, and more than 20% of people with obesity have diabetes, wrote Dr. Davies and colleagues.

Semaglutide (Ozempic), administered subcutaneously at a dose of 0.5 mg to 1 mg weekly, is approved by the Food and Drug Administration for the treatment of type 2 diabetes. Dosing studies indicated that it is associated with weight loss.

As previously reported, four trials of the use of semaglutide for weight loss (STEP 1, 2, 3, and 4) have been completed. The combined data were submitted to the FDA on Dec. 4, 2020 (a decision is expected within 6 months) and to the European Medicines Agency on Dec. 18, 2020.

The STEP 1 and STEP 3 trials of semaglutide 2.4 mg vs. placebo were recently published. The STEP 1 trial involved 1,961 adults with obesity or overweight; the STEP 3 trial, 611 adults with obesity or overweight. In each of the trials, some patients also underwent an intensive lifestyle intervention, and some did not. In both trials, patients with type 2 diabetes were excluded.

Topline results from STEP 2 were reported in June 2020.
 

STEP 2 enrolled patients with type 2 diabetes

STEP 2 involved 1,210 adults in 149 outpatient clinics in 12 countries in Europe, North America, South America, the Middle East, South Africa, and Asia. All participants had type 2 diabetes.

For all patients, the body mass index was ≥27 kg/m², and the A1c concentration was 7%-10%. The mean BMI was 35.7 kg/m², and the mean A1c was 8.1%.

The mean age of the patients was 55 years, and 51% were women; 62% were White, 26% were Asian, 13% were Hispanic, 8% were Black, and 4% were of other ethnicity.

Participants were managed with diet and exercise alone or underwent treatment with a stable dose of up to three oral glucose-lowering agents (metformin, sulfonylureas, SGLT2 inhibitors, or thiazolidinediones) for at least 90 days. They were then randomly assigned in 1:1:1 ratio to receive semaglutide 2.4 mg, semaglutide 1.0 mg, or placebo.

The starting dose of semaglutide was 0.25 mg/wk; the dose was escalated every 4 weeks to reach the target dose.

All patients received monthly counseling from a dietitian about calories (the goal was a 500-calorie/day deficit) and activity (the goal was 150 minutes of walking or stair climbing per week).

The mean A1c dropped by 1.6% and 1.5% in the semaglutide groups and by 0.4% in the placebo group.

Adverse events were more frequent among the patients who received semaglutide (88% and 82%) than in the placebo group (77%).

Gastrointestinal events that were mainly mild to moderate in severity were reported by 64% of patients in the 2.4-mg semaglutide group, 58% in the 1.0-mg semaglutide group, and 34% in the placebo group.

Semaglutide (Rybelsus) is approved in the United States as a once-daily oral agent for use in type 2 diabetes in doses of 7 mg and 14 mg to improve glycemic control along with diet and exercise. It is the first GLP-1 agonist available in tablet form.

The study was supported by Novo Nordisk. The authors’ relevant financial relationships are listed in the original article.

A version of this article first appeared on Medscape.com.

A 2.4-mg weekly injection of the glucagon-like peptide-1 (GLP-1) receptor agonist semaglutide led to a clinically meaningful 5% loss in weight for roughly two-thirds of patients with both overweight/obesity and type 2 diabetes, researchers report.

These findings from the Semaglutide Treatment Effect in People With Obesity 2 (STEP 2) trial, one of four phase 3 trials of this drug, which is currently under regulatory review for weight loss, were published March 2 in The Lancet.

More than 1,000 patients (mean initial weight, 100 kg [220 pounds]) were randomly assigned to receive a lifestyle intervention plus a weekly injection of semaglutide 2.4 mg or semaglutide 1.0 mg or placebo. At 68 weeks, they had lost a mean of 9.6%, 7.0%, and 3.4%, respectively, of their starting weight.

In addition, 69% of patients who had received semaglutide 2.4 mg experienced a clinically meaningful 5% loss of weight, compared with 57% of patients who had received the lower dose and 29% of patients who had received placebo.

The higher dose of semaglutide was associated with a greater improvement in cardiometabolic risk factors. The safety profile was similar to that seen with other drugs in this class.
 

“By far the best results with any weight loss medicine in diabetes”

Importantly, “more than a quarter of participants lost over 15% of their body weight,” senior author Ildiko Lingvay, MD, stressed. This “is by far the best result we had with any weight loss medicine in patients with diabetes,” Dr. Lingvay, of the University of Texas, Dallas, said in a statement from the university.

Sara Freeman/MDedge News

“The drug works by suppressing appetite centers in the brain to reduce caloric intake,” she explained. “The medication continually tells the body that you just ate, you’re full.”

Similarly, lead author Melanie J. Davies, MD, said that the STEP 2 results “are exciting and represent a new era in weight management in people with type 2 diabetes.

Sara Freeman/MDedge News

One of four trials under review

More than 90% of people with type 2 diabetes are overweight or have obesity, and more than 20% of people with obesity have diabetes, wrote Dr. Davies and colleagues.

Semaglutide (Ozempic), administered subcutaneously at a dose of 0.5 mg to 1 mg weekly, is approved by the Food and Drug Administration for the treatment of type 2 diabetes. Dosing studies indicated that it is associated with weight loss.

As previously reported, four trials of the use of semaglutide for weight loss (STEP 1, 2, 3, and 4) have been completed. The combined data were submitted to the FDA on Dec. 4, 2020 (a decision is expected within 6 months) and to the European Medicines Agency on Dec. 18, 2020.

The STEP 1 and STEP 3 trials of semaglutide 2.4 mg vs. placebo were recently published. The STEP 1 trial involved 1,961 adults with obesity or overweight; the STEP 3 trial, 611 adults with obesity or overweight. In each of the trials, some patients also underwent an intensive lifestyle intervention, and some did not. In both trials, patients with type 2 diabetes were excluded.

Topline results from STEP 2 were reported in June 2020.
 

STEP 2 enrolled patients with type 2 diabetes

STEP 2 involved 1,210 adults in 149 outpatient clinics in 12 countries in Europe, North America, South America, the Middle East, South Africa, and Asia. All participants had type 2 diabetes.

For all patients, the body mass index was ≥27 kg/m², and the A1c concentration was 7%-10%. The mean BMI was 35.7 kg/m², and the mean A1c was 8.1%.

The mean age of the patients was 55 years, and 51% were women; 62% were White, 26% were Asian, 13% were Hispanic, 8% were Black, and 4% were of other ethnicity.

Participants were managed with diet and exercise alone or underwent treatment with a stable dose of up to three oral glucose-lowering agents (metformin, sulfonylureas, SGLT2 inhibitors, or thiazolidinediones) for at least 90 days. They were then randomly assigned in 1:1:1 ratio to receive semaglutide 2.4 mg, semaglutide 1.0 mg, or placebo.

The starting dose of semaglutide was 0.25 mg/wk; the dose was escalated every 4 weeks to reach the target dose.

All patients received monthly counseling from a dietitian about calories (the goal was a 500-calorie/day deficit) and activity (the goal was 150 minutes of walking or stair climbing per week).

The mean A1c dropped by 1.6% and 1.5% in the semaglutide groups and by 0.4% in the placebo group.

Adverse events were more frequent among the patients who received semaglutide (88% and 82%) than in the placebo group (77%).

Gastrointestinal events that were mainly mild to moderate in severity were reported by 64% of patients in the 2.4-mg semaglutide group, 58% in the 1.0-mg semaglutide group, and 34% in the placebo group.

Semaglutide (Rybelsus) is approved in the United States as a once-daily oral agent for use in type 2 diabetes in doses of 7 mg and 14 mg to improve glycemic control along with diet and exercise. It is the first GLP-1 agonist available in tablet form.

The study was supported by Novo Nordisk. The authors’ relevant financial relationships are listed in the original article.

A version of this article first appeared on Medscape.com.

A 2.4-mg weekly injection of the glucagon-like peptide-1 (GLP-1) receptor agonist semaglutide led to a clinically meaningful 5% loss in weight for roughly two-thirds of patients with both overweight/obesity and type 2 diabetes, researchers report.

These findings from the Semaglutide Treatment Effect in People With Obesity 2 (STEP 2) trial, one of four phase 3 trials of this drug, which is currently under regulatory review for weight loss, were published March 2 in The Lancet.

More than 1,000 patients (mean initial weight, 100 kg [220 pounds]) were randomly assigned to receive a lifestyle intervention plus a weekly injection of semaglutide 2.4 mg or semaglutide 1.0 mg or placebo. At 68 weeks, they had lost a mean of 9.6%, 7.0%, and 3.4%, respectively, of their starting weight.

In addition, 69% of patients who had received semaglutide 2.4 mg experienced a clinically meaningful 5% loss of weight, compared with 57% of patients who had received the lower dose and 29% of patients who had received placebo.

The higher dose of semaglutide was associated with a greater improvement in cardiometabolic risk factors. The safety profile was similar to that seen with other drugs in this class.
 

“By far the best results with any weight loss medicine in diabetes”

Importantly, “more than a quarter of participants lost over 15% of their body weight,” senior author Ildiko Lingvay, MD, stressed. This “is by far the best result we had with any weight loss medicine in patients with diabetes,” Dr. Lingvay, of the University of Texas, Dallas, said in a statement from the university.

Sara Freeman/MDedge News

“The drug works by suppressing appetite centers in the brain to reduce caloric intake,” she explained. “The medication continually tells the body that you just ate, you’re full.”

Similarly, lead author Melanie J. Davies, MD, said that the STEP 2 results “are exciting and represent a new era in weight management in people with type 2 diabetes.

Sara Freeman/MDedge News

One of four trials under review

More than 90% of people with type 2 diabetes are overweight or have obesity, and more than 20% of people with obesity have diabetes, wrote Dr. Davies and colleagues.

Semaglutide (Ozempic), administered subcutaneously at a dose of 0.5 mg to 1 mg weekly, is approved by the Food and Drug Administration for the treatment of type 2 diabetes. Dosing studies indicated that it is associated with weight loss.

As previously reported, four trials of the use of semaglutide for weight loss (STEP 1, 2, 3, and 4) have been completed. The combined data were submitted to the FDA on Dec. 4, 2020 (a decision is expected within 6 months) and to the European Medicines Agency on Dec. 18, 2020.

The STEP 1 and STEP 3 trials of semaglutide 2.4 mg vs. placebo were recently published. The STEP 1 trial involved 1,961 adults with obesity or overweight; the STEP 3 trial, 611 adults with obesity or overweight. In each of the trials, some patients also underwent an intensive lifestyle intervention, and some did not. In both trials, patients with type 2 diabetes were excluded.

Topline results from STEP 2 were reported in June 2020.
 

STEP 2 enrolled patients with type 2 diabetes

STEP 2 involved 1,210 adults in 149 outpatient clinics in 12 countries in Europe, North America, South America, the Middle East, South Africa, and Asia. All participants had type 2 diabetes.

For all patients, the body mass index was ≥27 kg/m², and the A1c concentration was 7%-10%. The mean BMI was 35.7 kg/m², and the mean A1c was 8.1%.

The mean age of the patients was 55 years, and 51% were women; 62% were White, 26% were Asian, 13% were Hispanic, 8% were Black, and 4% were of other ethnicity.

Participants were managed with diet and exercise alone or underwent treatment with a stable dose of up to three oral glucose-lowering agents (metformin, sulfonylureas, SGLT2 inhibitors, or thiazolidinediones) for at least 90 days. They were then randomly assigned in 1:1:1 ratio to receive semaglutide 2.4 mg, semaglutide 1.0 mg, or placebo.

The starting dose of semaglutide was 0.25 mg/wk; the dose was escalated every 4 weeks to reach the target dose.

All patients received monthly counseling from a dietitian about calories (the goal was a 500-calorie/day deficit) and activity (the goal was 150 minutes of walking or stair climbing per week).

The mean A1c dropped by 1.6% and 1.5% in the semaglutide groups and by 0.4% in the placebo group.

Adverse events were more frequent among the patients who received semaglutide (88% and 82%) than in the placebo group (77%).

Gastrointestinal events that were mainly mild to moderate in severity were reported by 64% of patients in the 2.4-mg semaglutide group, 58% in the 1.0-mg semaglutide group, and 34% in the placebo group.

Semaglutide (Rybelsus) is approved in the United States as a once-daily oral agent for use in type 2 diabetes in doses of 7 mg and 14 mg to improve glycemic control along with diet and exercise. It is the first GLP-1 agonist available in tablet form.

The study was supported by Novo Nordisk. The authors’ relevant financial relationships are listed in the original article.

A version of this article first appeared on Medscape.com.

Long-acting injectable (LAI) drug formulations represent a promising new strategy for the prevention and treatment of tuberculosis in women and children, according to an online presentation at the Conference on Retroviruses & Opportunistic Infections, held virtually.

“As a delivery strategy, LAIs hold the potential to unlock a vast chemical space of lipophilic compounds with very potent anti-TB activity that would otherwise not be developed due to poor predicted oral bioavailability,” explained presenter Eric Nuermberger, MD.

He summarized current preventive treatment options for TB and reviewed the potential impact of LAI formulations on TB therapy. In addition, he identified key challenges for future LAI development and proposed a new development path for clinical implementation.
 

Current TB preventive therapies

Despite widespread availability, the uptake of TB preventive therapy is poor and currently lags behind global targets. One key barrier to widespread uptake is the long duration of treatment, which may hinder patient adherence to therapy.

While shorter preventive regimens, such as 1 month of daily isoniazid plus rifapentine, show similar efficacy and higher completion rates, further shortening of therapy and reducing clinic visits are the most direct methods to increase adherence and treatment completion rates, Dr. Nuermberger said.
 

LAI drugs

LAI drug formulations allow for slow release of suitable drugs from a depot injected subcutaneously or intramuscularly.

The goal of LAI formulations is to free patients from the daily burden of oral administration. Other potential benefits include better adherence and efficacy, drug exposure, and the potential to overcome intrinsic poor oral bioavailability by bypassing the GI tract entirely.

Potential indications for LAIs include treatment of latent tuberculosis infection (LTBI), and as continuous therapy in people living with HIV in high-burden settings. There is also potential for treating younger children, such as household contacts, who have difficulty taking oral medications.

“We’ve already seen LAIs revolutionize other areas, such as psychiatry and contraception, and we appear to have another revolution in HIV prevention and treatment,” Dr. Nuermberger explained.

Not all existing TB drugs are suitable for LAI formulations, but drugs such as rifapentine, rifabutin, delamanid, and bedaquiline, show more promise than isoniazid or rifampin because of their physiochemical composition. Of all, bedaquiline may offer the best profile for LAI formulation, Dr. Nuermberger said.

Early proof-of-concept in vivo studies have shown potential use of LAI bedaquiline for TB prevention in both drug-sensitive and drug-resistant TB contacts. Translational PK modeling and simulation predicted that a 1-g intramuscular injection of LAI bedaquiline could maintain therapeutic plasma concentrations in humans for greater than 1 month.

Dr. Nuermberger noted that novel diarylquinoline-based therapies, currently in phase 1 studies, may be even better candidates for LAI-based TB preventive therapy. Early data suggests these compounds may be 10-20 times more potent and have a lower CV risk profile than that of bedaquiline.
 

Considerations for development and implementation

“Despite the promising potential of long-acting injectables for TB, we are still in the very early stages,” said Dr. Nuermberger.

Ensuring and optimizing acceptance of LAI formulations, especially in at-risk populations, will be very important, he explained. Early involvement of children and pregnant women in studies of who may benefit most from LAI drugs will also be essential.

Other important considerations include cost-effectiveness, particularly in at-risk and vulnerable populations. Furthermore, new dedicated research and development programs are needed to continue to develop more drug candidates suitable for LAI.

“Long-acting formulations hold enormous promise to be transformative for combating TB, through simplification of delivery and overcoming issues of adherence that can compromise success of current interventions,” said Andrew Owen, PhD, of the University of Liverpool (England).

“The ability to deliver an entire course of drug in a single visit promises to ensure missed doses don’t compromise outcomes or place unnecessary selective pressure in favor of drug resistance,” Dr. Owen said.

“Recent studies showing the value of one-month oral treatment regimens for LTBI make long-acting formulations seem more realistic and drugs such as long-acting bedaquiline put a one-shot regimen within reach,” Charles W. Flexner, MD, of Johns Hopkins University, Baltimore, said in an interview.

While no LAIs have been approved for TB, Dr. Nuermberger was optimistic that the recent success of LAI formulations for HIV treatment and prevention will catalyze further efforts in the TB landscape.

Dr. Nuermberger disclosed research support from Janssen Pharmaceuticals, TB Alliance, and the Gates Medical Research Institute. The presentation was sponsored by Janssen Pharmaceuticals, Johns Hopkins CFAR, NIH, Unitaid, and the TB Alliance.

Long-acting injectable (LAI) drug formulations represent a promising new strategy for the prevention and treatment of tuberculosis in women and children, according to an online presentation at the Conference on Retroviruses & Opportunistic Infections, held virtually.

“As a delivery strategy, LAIs hold the potential to unlock a vast chemical space of lipophilic compounds with very potent anti-TB activity that would otherwise not be developed due to poor predicted oral bioavailability,” explained presenter Eric Nuermberger, MD.

He summarized current preventive treatment options for TB and reviewed the potential impact of LAI formulations on TB therapy. In addition, he identified key challenges for future LAI development and proposed a new development path for clinical implementation.
 

Current TB preventive therapies

Despite widespread availability, the uptake of TB preventive therapy is poor and currently lags behind global targets. One key barrier to widespread uptake is the long duration of treatment, which may hinder patient adherence to therapy.

While shorter preventive regimens, such as 1 month of daily isoniazid plus rifapentine, show similar efficacy and higher completion rates, further shortening of therapy and reducing clinic visits are the most direct methods to increase adherence and treatment completion rates, Dr. Nuermberger said.
 

LAI drugs

LAI drug formulations allow for slow release of suitable drugs from a depot injected subcutaneously or intramuscularly.

The goal of LAI formulations is to free patients from the daily burden of oral administration. Other potential benefits include better adherence and efficacy, drug exposure, and the potential to overcome intrinsic poor oral bioavailability by bypassing the GI tract entirely.

Potential indications for LAIs include treatment of latent tuberculosis infection (LTBI), and as continuous therapy in people living with HIV in high-burden settings. There is also potential for treating younger children, such as household contacts, who have difficulty taking oral medications.

“We’ve already seen LAIs revolutionize other areas, such as psychiatry and contraception, and we appear to have another revolution in HIV prevention and treatment,” Dr. Nuermberger explained.

Not all existing TB drugs are suitable for LAI formulations, but drugs such as rifapentine, rifabutin, delamanid, and bedaquiline, show more promise than isoniazid or rifampin because of their physiochemical composition. Of all, bedaquiline may offer the best profile for LAI formulation, Dr. Nuermberger said.

Early proof-of-concept in vivo studies have shown potential use of LAI bedaquiline for TB prevention in both drug-sensitive and drug-resistant TB contacts. Translational PK modeling and simulation predicted that a 1-g intramuscular injection of LAI bedaquiline could maintain therapeutic plasma concentrations in humans for greater than 1 month.

Dr. Nuermberger noted that novel diarylquinoline-based therapies, currently in phase 1 studies, may be even better candidates for LAI-based TB preventive therapy. Early data suggests these compounds may be 10-20 times more potent and have a lower CV risk profile than that of bedaquiline.
 

Considerations for development and implementation

“Despite the promising potential of long-acting injectables for TB, we are still in the very early stages,” said Dr. Nuermberger.

Ensuring and optimizing acceptance of LAI formulations, especially in at-risk populations, will be very important, he explained. Early involvement of children and pregnant women in studies of who may benefit most from LAI drugs will also be essential.

Other important considerations include cost-effectiveness, particularly in at-risk and vulnerable populations. Furthermore, new dedicated research and development programs are needed to continue to develop more drug candidates suitable for LAI.

“Long-acting formulations hold enormous promise to be transformative for combating TB, through simplification of delivery and overcoming issues of adherence that can compromise success of current interventions,” said Andrew Owen, PhD, of the University of Liverpool (England).

“The ability to deliver an entire course of drug in a single visit promises to ensure missed doses don’t compromise outcomes or place unnecessary selective pressure in favor of drug resistance,” Dr. Owen said.

“Recent studies showing the value of one-month oral treatment regimens for LTBI make long-acting formulations seem more realistic and drugs such as long-acting bedaquiline put a one-shot regimen within reach,” Charles W. Flexner, MD, of Johns Hopkins University, Baltimore, said in an interview.

While no LAIs have been approved for TB, Dr. Nuermberger was optimistic that the recent success of LAI formulations for HIV treatment and prevention will catalyze further efforts in the TB landscape.

Dr. Nuermberger disclosed research support from Janssen Pharmaceuticals, TB Alliance, and the Gates Medical Research Institute. The presentation was sponsored by Janssen Pharmaceuticals, Johns Hopkins CFAR, NIH, Unitaid, and the TB Alliance.

Long-acting injectable (LAI) drug formulations represent a promising new strategy for the prevention and treatment of tuberculosis in women and children, according to an online presentation at the Conference on Retroviruses & Opportunistic Infections, held virtually.

“As a delivery strategy, LAIs hold the potential to unlock a vast chemical space of lipophilic compounds with very potent anti-TB activity that would otherwise not be developed due to poor predicted oral bioavailability,” explained presenter Eric Nuermberger, MD.

He summarized current preventive treatment options for TB and reviewed the potential impact of LAI formulations on TB therapy. In addition, he identified key challenges for future LAI development and proposed a new development path for clinical implementation.
 

Current TB preventive therapies

Despite widespread availability, the uptake of TB preventive therapy is poor and currently lags behind global targets. One key barrier to widespread uptake is the long duration of treatment, which may hinder patient adherence to therapy.

While shorter preventive regimens, such as 1 month of daily isoniazid plus rifapentine, show similar efficacy and higher completion rates, further shortening of therapy and reducing clinic visits are the most direct methods to increase adherence and treatment completion rates, Dr. Nuermberger said.
 

LAI drugs

LAI drug formulations allow for slow release of suitable drugs from a depot injected subcutaneously or intramuscularly.

The goal of LAI formulations is to free patients from the daily burden of oral administration. Other potential benefits include better adherence and efficacy, drug exposure, and the potential to overcome intrinsic poor oral bioavailability by bypassing the GI tract entirely.

Potential indications for LAIs include treatment of latent tuberculosis infection (LTBI), and as continuous therapy in people living with HIV in high-burden settings. There is also potential for treating younger children, such as household contacts, who have difficulty taking oral medications.

“We’ve already seen LAIs revolutionize other areas, such as psychiatry and contraception, and we appear to have another revolution in HIV prevention and treatment,” Dr. Nuermberger explained.

Not all existing TB drugs are suitable for LAI formulations, but drugs such as rifapentine, rifabutin, delamanid, and bedaquiline, show more promise than isoniazid or rifampin because of their physiochemical composition. Of all, bedaquiline may offer the best profile for LAI formulation, Dr. Nuermberger said.

Early proof-of-concept in vivo studies have shown potential use of LAI bedaquiline for TB prevention in both drug-sensitive and drug-resistant TB contacts. Translational PK modeling and simulation predicted that a 1-g intramuscular injection of LAI bedaquiline could maintain therapeutic plasma concentrations in humans for greater than 1 month.

Dr. Nuermberger noted that novel diarylquinoline-based therapies, currently in phase 1 studies, may be even better candidates for LAI-based TB preventive therapy. Early data suggests these compounds may be 10-20 times more potent and have a lower CV risk profile than that of bedaquiline.
 

Considerations for development and implementation

“Despite the promising potential of long-acting injectables for TB, we are still in the very early stages,” said Dr. Nuermberger.

Ensuring and optimizing acceptance of LAI formulations, especially in at-risk populations, will be very important, he explained. Early involvement of children and pregnant women in studies of who may benefit most from LAI drugs will also be essential.

Other important considerations include cost-effectiveness, particularly in at-risk and vulnerable populations. Furthermore, new dedicated research and development programs are needed to continue to develop more drug candidates suitable for LAI.

“Long-acting formulations hold enormous promise to be transformative for combating TB, through simplification of delivery and overcoming issues of adherence that can compromise success of current interventions,” said Andrew Owen, PhD, of the University of Liverpool (England).

“The ability to deliver an entire course of drug in a single visit promises to ensure missed doses don’t compromise outcomes or place unnecessary selective pressure in favor of drug resistance,” Dr. Owen said.

“Recent studies showing the value of one-month oral treatment regimens for LTBI make long-acting formulations seem more realistic and drugs such as long-acting bedaquiline put a one-shot regimen within reach,” Charles W. Flexner, MD, of Johns Hopkins University, Baltimore, said in an interview.

While no LAIs have been approved for TB, Dr. Nuermberger was optimistic that the recent success of LAI formulations for HIV treatment and prevention will catalyze further efforts in the TB landscape.

Dr. Nuermberger disclosed research support from Janssen Pharmaceuticals, TB Alliance, and the Gates Medical Research Institute. The presentation was sponsored by Janssen Pharmaceuticals, Johns Hopkins CFAR, NIH, Unitaid, and the TB Alliance.

Direct oral anticoagulants (DOACs) are used in about 1% of patients undergoing surgical mechanical aortic and mitral valve replacement, but in up to 6% of surgical bioprosthetic valve replacements, according to registry data presented at CRT 2021.

In an analysis of the Society of Thoracic Surgery (STS) registry during 2014-2017, DOAC use increased steadily among those undergoing surgical bioprosthetic valve replacement, reaching a number that is potentially clinically significant, according to Ankur Kalra, MD, an interventional cardiologist at Akron General Hospital who has an academic appointment at the Cleveland Clinic.

There was no increase in the use of DOACs observed among patients undergoing mechanical valve replacement, “but even if the number is 1%, they should probably not be used at all until we accrue more data,” Dr. Kalra said.
 

DOACs discouraged in patients with mechanical or bioprosthetic valves

In Food and Drug Administration labeling, DOACs are contraindicated or not recommended. This can be traced to the randomized RE-ALIGN trial, which was stopped prematurely due to evidence of harm from a DOAC, according to Dr. Kalra.

In RE-ALIGN, which enrolled patients undergoing mechanical aortic or mitral valve replacement, dabigatran was associated not only with more bleeding events than warfarin, but also more thromboembolic events.

There are no randomized data comparing the factor Xa inhibitors rivaroxaban or apixaban to warfarin in heart valve surgery, but Dr. Kalra noted cautionary language is found in the labeling of both, “perhaps due to the RE-ALIGN data.”
 

Registry shows trends in prescribing

In the STS registry data, 193 (1.1%) of the 18,142 patients undergoing mechanical aortic valve surgery, 139 (1.0%) of the 13,942 patients undergoing mechanical mitral valve surgery, 5,625 (4.7%) of the 116,203 patients undergoing aortic bioprosthetic aortic valve surgery, and 2,180 (5.9%) of the 39,243 patients undergoing bioprosthetic mitral valve surgery were on a DOAC at discharge.

Among those receiving a mechanical value and placed on a DOAC, about two-thirds were on a factor Xa inhibitor rather than dabigatran. For those receiving a bioprosthetic value, the proportion was greater than 80%. Dr. Kalra speculated that the RE-ALIGN trial might be the reason factor Xa inhibitors were favored.

In both types of valves, whether mechanical or bioprosthetic, more comorbidities predicted a greater likelihood of receiving a DOAC rather than warfarin. For those receiving mechanical values, the comorbidities with a significant association with greater DOAC use included hypertension (P = .003), dyslipidemia (P = .02), arrhythmia (P < .001), and peripheral arterial disease (P < 0.001).

The same factors were significant for predicting increased likelihood of a DOAC following bioprosthetic valve replacement, but there were additional factors, including atrial fibrillation independent of other types of arrhythmias (P < .001), a factor not significant for mechanical valves, as well as diabetes (P < .001), cerebrovascular disease (P < .001), dialysis (P < .001), and endocarditis (P < .001).

“This is probably intuitive, but patients who were on a factor Xa inhibitor before their valve replacement were also more likely to be discharged on a factor Xa inhibitor,” Dr. Kalra said at the virtual meeting, sponsored by MedStar Heart & Vascular Institute.

The year-to-year increase in DOAC use among those undergoing bioprosthetic valve replacement over the study period, which was a significant trend, was not observed among those undergoing mechanical valve replacement. Rather, the 1% proportion remained stable over the study period.

“We wanted to look at outcomes, but we found that the STS database, which only includes data out to 30 days, is not structured for this type of analysis,” Dr. Kalra said. He was also concerned about the limitations of a comparison in which 1% of the sample was being compared to 99%.
 

Expert: One percent is ‘very small number’

David J. Cohen, MD, commented on the 1% figure, which was so low that a moderator questioned whether it could be due mostly to coding errors.

“This is a very, very small number so at some level it is reassuring that it is so low in the mechanical valves,” Dr. Cohen said. However, he was more circumspect about the larger number in bioprosthetic valves.

“I have always thought it was a bit strange there was a warning against using them in bioprosthetic valves, especially in the aortic position,” he said.

Direct oral anticoagulants (DOACs) are used in about 1% of patients undergoing surgical mechanical aortic and mitral valve replacement, but in up to 6% of surgical bioprosthetic valve replacements, according to registry data presented at CRT 2021.

In an analysis of the Society of Thoracic Surgery (STS) registry during 2014-2017, DOAC use increased steadily among those undergoing surgical bioprosthetic valve replacement, reaching a number that is potentially clinically significant, according to Ankur Kalra, MD, an interventional cardiologist at Akron General Hospital who has an academic appointment at the Cleveland Clinic.

There was no increase in the use of DOACs observed among patients undergoing mechanical valve replacement, “but even if the number is 1%, they should probably not be used at all until we accrue more data,” Dr. Kalra said.
 

DOACs discouraged in patients with mechanical or bioprosthetic valves

In Food and Drug Administration labeling, DOACs are contraindicated or not recommended. This can be traced to the randomized RE-ALIGN trial, which was stopped prematurely due to evidence of harm from a DOAC, according to Dr. Kalra.

In RE-ALIGN, which enrolled patients undergoing mechanical aortic or mitral valve replacement, dabigatran was associated not only with more bleeding events than warfarin, but also more thromboembolic events.

There are no randomized data comparing the factor Xa inhibitors rivaroxaban or apixaban to warfarin in heart valve surgery, but Dr. Kalra noted cautionary language is found in the labeling of both, “perhaps due to the RE-ALIGN data.”
 

Registry shows trends in prescribing

In the STS registry data, 193 (1.1%) of the 18,142 patients undergoing mechanical aortic valve surgery, 139 (1.0%) of the 13,942 patients undergoing mechanical mitral valve surgery, 5,625 (4.7%) of the 116,203 patients undergoing aortic bioprosthetic aortic valve surgery, and 2,180 (5.9%) of the 39,243 patients undergoing bioprosthetic mitral valve surgery were on a DOAC at discharge.

Among those receiving a mechanical value and placed on a DOAC, about two-thirds were on a factor Xa inhibitor rather than dabigatran. For those receiving a bioprosthetic value, the proportion was greater than 80%. Dr. Kalra speculated that the RE-ALIGN trial might be the reason factor Xa inhibitors were favored.

In both types of valves, whether mechanical or bioprosthetic, more comorbidities predicted a greater likelihood of receiving a DOAC rather than warfarin. For those receiving mechanical values, the comorbidities with a significant association with greater DOAC use included hypertension (P = .003), dyslipidemia (P = .02), arrhythmia (P < .001), and peripheral arterial disease (P < 0.001).

The same factors were significant for predicting increased likelihood of a DOAC following bioprosthetic valve replacement, but there were additional factors, including atrial fibrillation independent of other types of arrhythmias (P < .001), a factor not significant for mechanical valves, as well as diabetes (P < .001), cerebrovascular disease (P < .001), dialysis (P < .001), and endocarditis (P < .001).

“This is probably intuitive, but patients who were on a factor Xa inhibitor before their valve replacement were also more likely to be discharged on a factor Xa inhibitor,” Dr. Kalra said at the virtual meeting, sponsored by MedStar Heart & Vascular Institute.

The year-to-year increase in DOAC use among those undergoing bioprosthetic valve replacement over the study period, which was a significant trend, was not observed among those undergoing mechanical valve replacement. Rather, the 1% proportion remained stable over the study period.

“We wanted to look at outcomes, but we found that the STS database, which only includes data out to 30 days, is not structured for this type of analysis,” Dr. Kalra said. He was also concerned about the limitations of a comparison in which 1% of the sample was being compared to 99%.
 

Expert: One percent is ‘very small number’

David J. Cohen, MD, commented on the 1% figure, which was so low that a moderator questioned whether it could be due mostly to coding errors.

“This is a very, very small number so at some level it is reassuring that it is so low in the mechanical valves,” Dr. Cohen said. However, he was more circumspect about the larger number in bioprosthetic valves.

“I have always thought it was a bit strange there was a warning against using them in bioprosthetic valves, especially in the aortic position,” he said.

Direct oral anticoagulants (DOACs) are used in about 1% of patients undergoing surgical mechanical aortic and mitral valve replacement, but in up to 6% of surgical bioprosthetic valve replacements, according to registry data presented at CRT 2021.

In an analysis of the Society of Thoracic Surgery (STS) registry during 2014-2017, DOAC use increased steadily among those undergoing surgical bioprosthetic valve replacement, reaching a number that is potentially clinically significant, according to Ankur Kalra, MD, an interventional cardiologist at Akron General Hospital who has an academic appointment at the Cleveland Clinic.

There was no increase in the use of DOACs observed among patients undergoing mechanical valve replacement, “but even if the number is 1%, they should probably not be used at all until we accrue more data,” Dr. Kalra said.
 

DOACs discouraged in patients with mechanical or bioprosthetic valves

In Food and Drug Administration labeling, DOACs are contraindicated or not recommended. This can be traced to the randomized RE-ALIGN trial, which was stopped prematurely due to evidence of harm from a DOAC, according to Dr. Kalra.

In RE-ALIGN, which enrolled patients undergoing mechanical aortic or mitral valve replacement, dabigatran was associated not only with more bleeding events than warfarin, but also more thromboembolic events.

There are no randomized data comparing the factor Xa inhibitors rivaroxaban or apixaban to warfarin in heart valve surgery, but Dr. Kalra noted cautionary language is found in the labeling of both, “perhaps due to the RE-ALIGN data.”
 

Registry shows trends in prescribing

In the STS registry data, 193 (1.1%) of the 18,142 patients undergoing mechanical aortic valve surgery, 139 (1.0%) of the 13,942 patients undergoing mechanical mitral valve surgery, 5,625 (4.7%) of the 116,203 patients undergoing aortic bioprosthetic aortic valve surgery, and 2,180 (5.9%) of the 39,243 patients undergoing bioprosthetic mitral valve surgery were on a DOAC at discharge.

Among those receiving a mechanical value and placed on a DOAC, about two-thirds were on a factor Xa inhibitor rather than dabigatran. For those receiving a bioprosthetic value, the proportion was greater than 80%. Dr. Kalra speculated that the RE-ALIGN trial might be the reason factor Xa inhibitors were favored.

In both types of valves, whether mechanical or bioprosthetic, more comorbidities predicted a greater likelihood of receiving a DOAC rather than warfarin. For those receiving mechanical values, the comorbidities with a significant association with greater DOAC use included hypertension (P = .003), dyslipidemia (P = .02), arrhythmia (P < .001), and peripheral arterial disease (P < 0.001).

The same factors were significant for predicting increased likelihood of a DOAC following bioprosthetic valve replacement, but there were additional factors, including atrial fibrillation independent of other types of arrhythmias (P < .001), a factor not significant for mechanical valves, as well as diabetes (P < .001), cerebrovascular disease (P < .001), dialysis (P < .001), and endocarditis (P < .001).

“This is probably intuitive, but patients who were on a factor Xa inhibitor before their valve replacement were also more likely to be discharged on a factor Xa inhibitor,” Dr. Kalra said at the virtual meeting, sponsored by MedStar Heart & Vascular Institute.

The year-to-year increase in DOAC use among those undergoing bioprosthetic valve replacement over the study period, which was a significant trend, was not observed among those undergoing mechanical valve replacement. Rather, the 1% proportion remained stable over the study period.

“We wanted to look at outcomes, but we found that the STS database, which only includes data out to 30 days, is not structured for this type of analysis,” Dr. Kalra said. He was also concerned about the limitations of a comparison in which 1% of the sample was being compared to 99%.
 

Expert: One percent is ‘very small number’

David J. Cohen, MD, commented on the 1% figure, which was so low that a moderator questioned whether it could be due mostly to coding errors.

“This is a very, very small number so at some level it is reassuring that it is so low in the mechanical valves,” Dr. Cohen said. However, he was more circumspect about the larger number in bioprosthetic valves.

“I have always thought it was a bit strange there was a warning against using them in bioprosthetic valves, especially in the aortic position,” he said.

A single pill of the investigational drug molnupiravir taken twice a day for 5 days eliminated SARS-CoV-2 from the nasopharynx of 49 participants.

That led Carlos del Rio, MD, distinguished professor of medicine at Emory University, Atlanta, to suggest a future in which a drug like molnupiravir could be taken in the first few days of symptoms to prevent severe disease, similar to Tamiflu for influenza.

“I think it’s critically important,” he said of the data. Emory University was involved in the trial of molnupiravir but Dr. del Rio was not part of that team. “This drug offers the first antiviral oral drug that then could be used in an outpatient setting.”

Still, Dr. del Rio said it’s too soon to call this particular drug the breakthrough clinicians need to keep people out of the ICU. “It has the potential to be practice changing; it’s not practice changing at the moment.”

Wendy Painter, MD, of Ridgeback Biotherapeutics, who presented the data at the Conference on Retroviruses and Opportunistic Infections, agreed. While the data are promising, “We will need to see if people get better from actual illness” to assess the real value of the drug in clinical care.

“That’s a phase 3 objective we’ll need to prove,” she said in an interview.

Phase 2/3 efficacy and safety studies of the drug are now underway in hospitalized and nonhospitalized patients.

In a brief prerecorded presentation of the data, Dr. Painter laid out what researchers know so far: Preclinical studies suggest that molnupiravir is effective against a number of viruses, including coronaviruses and specifically SARS-CoV-2. It prevents a virus from replicating by inducing viral error catastrophe (Proc Natl Acad Sci U S A. 2002 Oct 15;99[21]:13374-6) – essentially overloading the virus with replication and mutation until the virus burns itself out and can’t produce replicable copies.

In this phase 2a, randomized, double-blind, controlled trial, researchers recruited 202 adults who were treated at an outpatient clinic with fever or other symptoms of a respiratory virus and confirmed SARS-CoV-2 infection by day 4. Participants were randomly assigned to three different groups: 200 mg of molnupiravir, 400 mg, or 800 mg. The 200-mg arm was matched 1:1 with a placebo-controlled group, and the other two groups had three participants in the active group for every one control.

Participants took the pills twice daily for 5 days, and then were followed for a total of 28 days to monitor for complications or adverse events. At days 3, 5, 7, 14, and 28, researchers also took nasopharyngeal swabs for polymerase chain reaction tests, to sequence the virus, and to grow cultures of SARS-CoV-2 to see if the virus that’s present is actually capable of infecting others.

Notably, the pills do not have to be refrigerated at any point in the process, alleviating the cold-chain challenges that have plagued vaccines.

“There’s an urgent need for an easily produced, transported, stored, and administered antiviral drug against SARS-CoV-2,” Dr. Painter said.

Of the 202 people recruited, 182 had swabs that could be evaluated, of which 78 showed infection at baseline. The results are based on labs of those 78 participants.

By day 3, 28% of patients in the placebo arm had SARS-CoV-2 in their nasopharynx, compared with 20.4% of patients receiving any dose of molnupiravir. But by day 5, none of the participants receiving the active drug had evidence of SARS-CoV-2 in their nasopharynx. In comparison, 24% of people in the placebo arm still had detectable virus.

Halfway through the treatment course, differences in the presence of infectious virus were already evident. By day 3 of the 5-day course, 36.4% of participants in the 200-mg group had detectable virus in the nasopharynx, compared with 21% in the 400-mg group and just 12.5% in the 800-mg group. And although the reduction in SARS-CoV-2 was noticeable in the 200-mg and the 400-mg arms, it was only statistically significant in the 800-mg arm.

In contrast, by the end of the 5 days in the placebo groups, infectious virus varied from 18.2% in the 200-mg placebo group to 30% in the 800-mg group. This points out the variability of the disease course of SARS-CoV-2.

“You just don’t know” which infections will lead to serious disease, Dr. Painter said in an interview. “And don’t you wish we did?”

Seven participants discontinued treatment, though only four experienced adverse events. Three of those discontinued the trial because of adverse events. The study is still blinded, so it’s unclear what those events were, but Dr. Painter said that they were not thought to be related to the study drug.

The bottom line, said Dr. Painter, was that people treated with molnupiravir had starkly different outcomes in lab measures during the study.

“An average of 10 days after symptom onset, 24% of placebo patients remained culture positive” for SARS-CoV-2 – meaning there wasn’t just virus in the nasopharynx, but it was capable of replicating, Dr. Painter said. “In contrast, no infectious virus could be recovered at study day 5 in any molnupiravir-treated patients.”

A version of this article first appeared on Medscape.com.

A single pill of the investigational drug molnupiravir taken twice a day for 5 days eliminated SARS-CoV-2 from the nasopharynx of 49 participants.

That led Carlos del Rio, MD, distinguished professor of medicine at Emory University, Atlanta, to suggest a future in which a drug like molnupiravir could be taken in the first few days of symptoms to prevent severe disease, similar to Tamiflu for influenza.

“I think it’s critically important,” he said of the data. Emory University was involved in the trial of molnupiravir but Dr. del Rio was not part of that team. “This drug offers the first antiviral oral drug that then could be used in an outpatient setting.”

Still, Dr. del Rio said it’s too soon to call this particular drug the breakthrough clinicians need to keep people out of the ICU. “It has the potential to be practice changing; it’s not practice changing at the moment.”

Wendy Painter, MD, of Ridgeback Biotherapeutics, who presented the data at the Conference on Retroviruses and Opportunistic Infections, agreed. While the data are promising, “We will need to see if people get better from actual illness” to assess the real value of the drug in clinical care.

“That’s a phase 3 objective we’ll need to prove,” she said in an interview.

Phase 2/3 efficacy and safety studies of the drug are now underway in hospitalized and nonhospitalized patients.

In a brief prerecorded presentation of the data, Dr. Painter laid out what researchers know so far: Preclinical studies suggest that molnupiravir is effective against a number of viruses, including coronaviruses and specifically SARS-CoV-2. It prevents a virus from replicating by inducing viral error catastrophe (Proc Natl Acad Sci U S A. 2002 Oct 15;99[21]:13374-6) – essentially overloading the virus with replication and mutation until the virus burns itself out and can’t produce replicable copies.

In this phase 2a, randomized, double-blind, controlled trial, researchers recruited 202 adults who were treated at an outpatient clinic with fever or other symptoms of a respiratory virus and confirmed SARS-CoV-2 infection by day 4. Participants were randomly assigned to three different groups: 200 mg of molnupiravir, 400 mg, or 800 mg. The 200-mg arm was matched 1:1 with a placebo-controlled group, and the other two groups had three participants in the active group for every one control.

Participants took the pills twice daily for 5 days, and then were followed for a total of 28 days to monitor for complications or adverse events. At days 3, 5, 7, 14, and 28, researchers also took nasopharyngeal swabs for polymerase chain reaction tests, to sequence the virus, and to grow cultures of SARS-CoV-2 to see if the virus that’s present is actually capable of infecting others.

Notably, the pills do not have to be refrigerated at any point in the process, alleviating the cold-chain challenges that have plagued vaccines.

“There’s an urgent need for an easily produced, transported, stored, and administered antiviral drug against SARS-CoV-2,” Dr. Painter said.

Of the 202 people recruited, 182 had swabs that could be evaluated, of which 78 showed infection at baseline. The results are based on labs of those 78 participants.

By day 3, 28% of patients in the placebo arm had SARS-CoV-2 in their nasopharynx, compared with 20.4% of patients receiving any dose of molnupiravir. But by day 5, none of the participants receiving the active drug had evidence of SARS-CoV-2 in their nasopharynx. In comparison, 24% of people in the placebo arm still had detectable virus.

Halfway through the treatment course, differences in the presence of infectious virus were already evident. By day 3 of the 5-day course, 36.4% of participants in the 200-mg group had detectable virus in the nasopharynx, compared with 21% in the 400-mg group and just 12.5% in the 800-mg group. And although the reduction in SARS-CoV-2 was noticeable in the 200-mg and the 400-mg arms, it was only statistically significant in the 800-mg arm.

In contrast, by the end of the 5 days in the placebo groups, infectious virus varied from 18.2% in the 200-mg placebo group to 30% in the 800-mg group. This points out the variability of the disease course of SARS-CoV-2.

“You just don’t know” which infections will lead to serious disease, Dr. Painter said in an interview. “And don’t you wish we did?”

Seven participants discontinued treatment, though only four experienced adverse events. Three of those discontinued the trial because of adverse events. The study is still blinded, so it’s unclear what those events were, but Dr. Painter said that they were not thought to be related to the study drug.

The bottom line, said Dr. Painter, was that people treated with molnupiravir had starkly different outcomes in lab measures during the study.

“An average of 10 days after symptom onset, 24% of placebo patients remained culture positive” for SARS-CoV-2 – meaning there wasn’t just virus in the nasopharynx, but it was capable of replicating, Dr. Painter said. “In contrast, no infectious virus could be recovered at study day 5 in any molnupiravir-treated patients.”

A version of this article first appeared on Medscape.com.

A single pill of the investigational drug molnupiravir taken twice a day for 5 days eliminated SARS-CoV-2 from the nasopharynx of 49 participants.

That led Carlos del Rio, MD, distinguished professor of medicine at Emory University, Atlanta, to suggest a future in which a drug like molnupiravir could be taken in the first few days of symptoms to prevent severe disease, similar to Tamiflu for influenza.

“I think it’s critically important,” he said of the data. Emory University was involved in the trial of molnupiravir but Dr. del Rio was not part of that team. “This drug offers the first antiviral oral drug that then could be used in an outpatient setting.”

Still, Dr. del Rio said it’s too soon to call this particular drug the breakthrough clinicians need to keep people out of the ICU. “It has the potential to be practice changing; it’s not practice changing at the moment.”

Wendy Painter, MD, of Ridgeback Biotherapeutics, who presented the data at the Conference on Retroviruses and Opportunistic Infections, agreed. While the data are promising, “We will need to see if people get better from actual illness” to assess the real value of the drug in clinical care.

“That’s a phase 3 objective we’ll need to prove,” she said in an interview.

Phase 2/3 efficacy and safety studies of the drug are now underway in hospitalized and nonhospitalized patients.

In a brief prerecorded presentation of the data, Dr. Painter laid out what researchers know so far: Preclinical studies suggest that molnupiravir is effective against a number of viruses, including coronaviruses and specifically SARS-CoV-2. It prevents a virus from replicating by inducing viral error catastrophe (Proc Natl Acad Sci U S A. 2002 Oct 15;99[21]:13374-6) – essentially overloading the virus with replication and mutation until the virus burns itself out and can’t produce replicable copies.

In this phase 2a, randomized, double-blind, controlled trial, researchers recruited 202 adults who were treated at an outpatient clinic with fever or other symptoms of a respiratory virus and confirmed SARS-CoV-2 infection by day 4. Participants were randomly assigned to three different groups: 200 mg of molnupiravir, 400 mg, or 800 mg. The 200-mg arm was matched 1:1 with a placebo-controlled group, and the other two groups had three participants in the active group for every one control.

Participants took the pills twice daily for 5 days, and then were followed for a total of 28 days to monitor for complications or adverse events. At days 3, 5, 7, 14, and 28, researchers also took nasopharyngeal swabs for polymerase chain reaction tests, to sequence the virus, and to grow cultures of SARS-CoV-2 to see if the virus that’s present is actually capable of infecting others.

Notably, the pills do not have to be refrigerated at any point in the process, alleviating the cold-chain challenges that have plagued vaccines.

“There’s an urgent need for an easily produced, transported, stored, and administered antiviral drug against SARS-CoV-2,” Dr. Painter said.

Of the 202 people recruited, 182 had swabs that could be evaluated, of which 78 showed infection at baseline. The results are based on labs of those 78 participants.

By day 3, 28% of patients in the placebo arm had SARS-CoV-2 in their nasopharynx, compared with 20.4% of patients receiving any dose of molnupiravir. But by day 5, none of the participants receiving the active drug had evidence of SARS-CoV-2 in their nasopharynx. In comparison, 24% of people in the placebo arm still had detectable virus.

Halfway through the treatment course, differences in the presence of infectious virus were already evident. By day 3 of the 5-day course, 36.4% of participants in the 200-mg group had detectable virus in the nasopharynx, compared with 21% in the 400-mg group and just 12.5% in the 800-mg group. And although the reduction in SARS-CoV-2 was noticeable in the 200-mg and the 400-mg arms, it was only statistically significant in the 800-mg arm.

In contrast, by the end of the 5 days in the placebo groups, infectious virus varied from 18.2% in the 200-mg placebo group to 30% in the 800-mg group. This points out the variability of the disease course of SARS-CoV-2.

“You just don’t know” which infections will lead to serious disease, Dr. Painter said in an interview. “And don’t you wish we did?”

Seven participants discontinued treatment, though only four experienced adverse events. Three of those discontinued the trial because of adverse events. The study is still blinded, so it’s unclear what those events were, but Dr. Painter said that they were not thought to be related to the study drug.

The bottom line, said Dr. Painter, was that people treated with molnupiravir had starkly different outcomes in lab measures during the study.

“An average of 10 days after symptom onset, 24% of placebo patients remained culture positive” for SARS-CoV-2 – meaning there wasn’t just virus in the nasopharynx, but it was capable of replicating, Dr. Painter said. “In contrast, no infectious virus could be recovered at study day 5 in any molnupiravir-treated patients.”

A version of this article first appeared on Medscape.com.

Patients with multiple myeloma that has continued to progress despite many lines of therapy have shown deep and durable responses to a new chimeric antigen receptor (CAR) T-cell therapy, idecabtagene vicleucel (ide-cel, under development by Bristol-Myers Squibb and Bluebird Bio).

An expert not involved in the trial described the results as “phenomenal.”

Krina Patel, MD, an associate professor in the department of lymphoma/myeloma at the University of Texas MD Anderson Cancer Center, Houston, said that “the response rate of 73% in a patient population with a median of six lines of therapy, and with one-third of those patients achieving a deep response of complete response or better, is phenomenal.”

“We are very excited as a myeloma community for this study of idecabtagene vicleucel for relapsed/refractory patients,” Dr. Patel said.

The new data on ide-cell, from a trial in 128 patients, were published Feb. 25 in the New England Journal of Medicine.

Lead investigator of the study Nikhil Munshi, MD, of Dana-Farber Cancer Institute, Boston, said: “The results of this trial represent a true turning point in the treatment of this disease. In my 30 years of treating myeloma, I have not seen any other therapy as effective in this group of patients.”

Both experts highlighted the poor prognosis for this population of relapsed/refractory patients. Recent decades have seen a flurry of new agents for myeloma, and there are now three main classes of agents: immunomodulatory agents, proteasome inhibitors, and anti-CD38 antibodies. Nevertheless, in some patients, the disease continues to progress. For patients who have failed all three classes of drugs, the median progression-free survival is about 3-4 months, with a median overall survival of 8-9 months.
 

Product is awaiting approval

Ide-cel is currently awaiting FDA approval, with a decision date slated for March 27.

Several CAR T-cell products are already marketed for use in certain leukemias and lymphomas, and there is another for use in multiple myeloma, ciltacabtagene autoleucel (cilta-cel, under development by Janssen), that is awaiting approval in Europe.
 

Strong and sustained responses

The trial involved 128 patients treated with ide-cel infusions. At the time of data cutoff for this report (Jan. 14, 2020), 62 patients remained in the primary study. Of the 128 treated patients, the median age was 61 years and the median time since diagnosis was 6 years. About half (51%) had a high tumor burden (≥50% bone marrow plasma cells), 39% had extramedullary disease, 16% had stage III disease, and 35% had a high-risk cytogenetic abnormality, defined as del(17p), t(4;14), or t(14;16).

Patients in the cohort had received a median of six previous antimyeloma regimens (range, 3-16), and most of the patients (120, 94%) had undergone autologous hematopoietic stem cell transplants. In addition, the majority of patients (84%) had disease that was triple refractory (to an immunomodulatory agent, a proteasome inhibitor, and an anti-CD38 antibody), 60% had disease that was penta exposed (to bortezomib, carfilzomib, lenalidomide, pomalidomide, and daratumumab), and 26% had disease that was penta refractory.

At a median follow-up of 13.3 months, 94 of 128 patients (73%) showed a response to therapy (P < .001), with 42 (33%) showing a complete or stringent complete response, and 67 patients (52%) showing a “very good partial response or better.”

Overall median progression-free survival was 8.8 months at the 450×106 dose but more than double that (20.2 months) for patients who achieved a complete or stringent complete response. Estimated median overall survival was 19.4 months, with an overall survival of 78% at 12 months. The authors noted that overall survival data are not yet mature.

After experiencing disease progression, 28 patients were retreated with ide-cel, with 6 patients showing a second response. The durations of response ranged from 1.9 to 6.8 months.

All patients in the cohort experienced adverse events, primarily grade 3 or 4 events that occurred in 127 patients (99%). The most common events reported were hematologic toxicities, including neutropenia in 114 patients (89%), anemia in 77 (60%), and thrombocytopenia in 67 (52%), and were at least partially related to the lymphodepleting chemotherapy administered before ide-cel infusion, the authors note. Cytokine-release syndrome occurred in 107 patients (84%), primarily grade 1 or 2.

“Results of the KarMMa study support substantial antitumor activity for ide-cel across a target dose range of 150×106 to 450×106 CAR+ T cells,” the authors conclude. “The 450×106 dose appeared to be somewhat more effective than the other doses.”
 

New option?

“What this study further highlights is that higher cell dose tends to increase cell expansion, which correlates to improved response and duration of response,” said Dr. Patel.

Importantly, multiple vulnerable subgroups experienced impressive outcomes, such as those who are older or with high risk or extramedullary disease, she noted.

“My patients who have undergone this therapy, albeit on other clinical trials, all say that their quality of life during this time of remission is priceless,” Dr. Patel added. “The is the first therapy in the relapsed/refractory setting that allows patients to have a significant chemo-free period. We need to find more ways to do this for our patients.”

The study was supported by Bluebird Bio and Bristol-Myers Squibb. Dr. Patel has served on the advisory board for Janssen and Bristol-Myers Squibb. She also reports a speaking engagement with Oncopeptides. Dr. Munshi acts as a consultant for several pharmaceutical companies, and many coauthors also have relationships with industry, as listed in the original article.

A version of this article first appeared on Medscape.com.

Patients with multiple myeloma that has continued to progress despite many lines of therapy have shown deep and durable responses to a new chimeric antigen receptor (CAR) T-cell therapy, idecabtagene vicleucel (ide-cel, under development by Bristol-Myers Squibb and Bluebird Bio).

An expert not involved in the trial described the results as “phenomenal.”

Krina Patel, MD, an associate professor in the department of lymphoma/myeloma at the University of Texas MD Anderson Cancer Center, Houston, said that “the response rate of 73% in a patient population with a median of six lines of therapy, and with one-third of those patients achieving a deep response of complete response or better, is phenomenal.”

“We are very excited as a myeloma community for this study of idecabtagene vicleucel for relapsed/refractory patients,” Dr. Patel said.

The new data on ide-cell, from a trial in 128 patients, were published Feb. 25 in the New England Journal of Medicine.

Lead investigator of the study Nikhil Munshi, MD, of Dana-Farber Cancer Institute, Boston, said: “The results of this trial represent a true turning point in the treatment of this disease. In my 30 years of treating myeloma, I have not seen any other therapy as effective in this group of patients.”

Both experts highlighted the poor prognosis for this population of relapsed/refractory patients. Recent decades have seen a flurry of new agents for myeloma, and there are now three main classes of agents: immunomodulatory agents, proteasome inhibitors, and anti-CD38 antibodies. Nevertheless, in some patients, the disease continues to progress. For patients who have failed all three classes of drugs, the median progression-free survival is about 3-4 months, with a median overall survival of 8-9 months.
 

Product is awaiting approval

Ide-cel is currently awaiting FDA approval, with a decision date slated for March 27.

Several CAR T-cell products are already marketed for use in certain leukemias and lymphomas, and there is another for use in multiple myeloma, ciltacabtagene autoleucel (cilta-cel, under development by Janssen), that is awaiting approval in Europe.
 

Strong and sustained responses

The trial involved 128 patients treated with ide-cel infusions. At the time of data cutoff for this report (Jan. 14, 2020), 62 patients remained in the primary study. Of the 128 treated patients, the median age was 61 years and the median time since diagnosis was 6 years. About half (51%) had a high tumor burden (≥50% bone marrow plasma cells), 39% had extramedullary disease, 16% had stage III disease, and 35% had a high-risk cytogenetic abnormality, defined as del(17p), t(4;14), or t(14;16).

Patients in the cohort had received a median of six previous antimyeloma regimens (range, 3-16), and most of the patients (120, 94%) had undergone autologous hematopoietic stem cell transplants. In addition, the majority of patients (84%) had disease that was triple refractory (to an immunomodulatory agent, a proteasome inhibitor, and an anti-CD38 antibody), 60% had disease that was penta exposed (to bortezomib, carfilzomib, lenalidomide, pomalidomide, and daratumumab), and 26% had disease that was penta refractory.

At a median follow-up of 13.3 months, 94 of 128 patients (73%) showed a response to therapy (P < .001), with 42 (33%) showing a complete or stringent complete response, and 67 patients (52%) showing a “very good partial response or better.”

Overall median progression-free survival was 8.8 months at the 450×106 dose but more than double that (20.2 months) for patients who achieved a complete or stringent complete response. Estimated median overall survival was 19.4 months, with an overall survival of 78% at 12 months. The authors noted that overall survival data are not yet mature.

After experiencing disease progression, 28 patients were retreated with ide-cel, with 6 patients showing a second response. The durations of response ranged from 1.9 to 6.8 months.

All patients in the cohort experienced adverse events, primarily grade 3 or 4 events that occurred in 127 patients (99%). The most common events reported were hematologic toxicities, including neutropenia in 114 patients (89%), anemia in 77 (60%), and thrombocytopenia in 67 (52%), and were at least partially related to the lymphodepleting chemotherapy administered before ide-cel infusion, the authors note. Cytokine-release syndrome occurred in 107 patients (84%), primarily grade 1 or 2.

“Results of the KarMMa study support substantial antitumor activity for ide-cel across a target dose range of 150×106 to 450×106 CAR+ T cells,” the authors conclude. “The 450×106 dose appeared to be somewhat more effective than the other doses.”
 

New option?

“What this study further highlights is that higher cell dose tends to increase cell expansion, which correlates to improved response and duration of response,” said Dr. Patel.

Importantly, multiple vulnerable subgroups experienced impressive outcomes, such as those who are older or with high risk or extramedullary disease, she noted.

“My patients who have undergone this therapy, albeit on other clinical trials, all say that their quality of life during this time of remission is priceless,” Dr. Patel added. “The is the first therapy in the relapsed/refractory setting that allows patients to have a significant chemo-free period. We need to find more ways to do this for our patients.”

The study was supported by Bluebird Bio and Bristol-Myers Squibb. Dr. Patel has served on the advisory board for Janssen and Bristol-Myers Squibb. She also reports a speaking engagement with Oncopeptides. Dr. Munshi acts as a consultant for several pharmaceutical companies, and many coauthors also have relationships with industry, as listed in the original article.

A version of this article first appeared on Medscape.com.

Patients with multiple myeloma that has continued to progress despite many lines of therapy have shown deep and durable responses to a new chimeric antigen receptor (CAR) T-cell therapy, idecabtagene vicleucel (ide-cel, under development by Bristol-Myers Squibb and Bluebird Bio).

An expert not involved in the trial described the results as “phenomenal.”

Krina Patel, MD, an associate professor in the department of lymphoma/myeloma at the University of Texas MD Anderson Cancer Center, Houston, said that “the response rate of 73% in a patient population with a median of six lines of therapy, and with one-third of those patients achieving a deep response of complete response or better, is phenomenal.”

“We are very excited as a myeloma community for this study of idecabtagene vicleucel for relapsed/refractory patients,” Dr. Patel said.

The new data on ide-cell, from a trial in 128 patients, were published Feb. 25 in the New England Journal of Medicine.

Lead investigator of the study Nikhil Munshi, MD, of Dana-Farber Cancer Institute, Boston, said: “The results of this trial represent a true turning point in the treatment of this disease. In my 30 years of treating myeloma, I have not seen any other therapy as effective in this group of patients.”

Both experts highlighted the poor prognosis for this population of relapsed/refractory patients. Recent decades have seen a flurry of new agents for myeloma, and there are now three main classes of agents: immunomodulatory agents, proteasome inhibitors, and anti-CD38 antibodies. Nevertheless, in some patients, the disease continues to progress. For patients who have failed all three classes of drugs, the median progression-free survival is about 3-4 months, with a median overall survival of 8-9 months.
 

Product is awaiting approval

Ide-cel is currently awaiting FDA approval, with a decision date slated for March 27.

Several CAR T-cell products are already marketed for use in certain leukemias and lymphomas, and there is another for use in multiple myeloma, ciltacabtagene autoleucel (cilta-cel, under development by Janssen), that is awaiting approval in Europe.
 

Strong and sustained responses

The trial involved 128 patients treated with ide-cel infusions. At the time of data cutoff for this report (Jan. 14, 2020), 62 patients remained in the primary study. Of the 128 treated patients, the median age was 61 years and the median time since diagnosis was 6 years. About half (51%) had a high tumor burden (≥50% bone marrow plasma cells), 39% had extramedullary disease, 16% had stage III disease, and 35% had a high-risk cytogenetic abnormality, defined as del(17p), t(4;14), or t(14;16).

Patients in the cohort had received a median of six previous antimyeloma regimens (range, 3-16), and most of the patients (120, 94%) had undergone autologous hematopoietic stem cell transplants. In addition, the majority of patients (84%) had disease that was triple refractory (to an immunomodulatory agent, a proteasome inhibitor, and an anti-CD38 antibody), 60% had disease that was penta exposed (to bortezomib, carfilzomib, lenalidomide, pomalidomide, and daratumumab), and 26% had disease that was penta refractory.

At a median follow-up of 13.3 months, 94 of 128 patients (73%) showed a response to therapy (P < .001), with 42 (33%) showing a complete or stringent complete response, and 67 patients (52%) showing a “very good partial response or better.”

Overall median progression-free survival was 8.8 months at the 450×106 dose but more than double that (20.2 months) for patients who achieved a complete or stringent complete response. Estimated median overall survival was 19.4 months, with an overall survival of 78% at 12 months. The authors noted that overall survival data are not yet mature.

After experiencing disease progression, 28 patients were retreated with ide-cel, with 6 patients showing a second response. The durations of response ranged from 1.9 to 6.8 months.

All patients in the cohort experienced adverse events, primarily grade 3 or 4 events that occurred in 127 patients (99%). The most common events reported were hematologic toxicities, including neutropenia in 114 patients (89%), anemia in 77 (60%), and thrombocytopenia in 67 (52%), and were at least partially related to the lymphodepleting chemotherapy administered before ide-cel infusion, the authors note. Cytokine-release syndrome occurred in 107 patients (84%), primarily grade 1 or 2.

“Results of the KarMMa study support substantial antitumor activity for ide-cel across a target dose range of 150×106 to 450×106 CAR+ T cells,” the authors conclude. “The 450×106 dose appeared to be somewhat more effective than the other doses.”
 

New option?

“What this study further highlights is that higher cell dose tends to increase cell expansion, which correlates to improved response and duration of response,” said Dr. Patel.

Importantly, multiple vulnerable subgroups experienced impressive outcomes, such as those who are older or with high risk or extramedullary disease, she noted.

“My patients who have undergone this therapy, albeit on other clinical trials, all say that their quality of life during this time of remission is priceless,” Dr. Patel added. “The is the first therapy in the relapsed/refractory setting that allows patients to have a significant chemo-free period. We need to find more ways to do this for our patients.”

The study was supported by Bluebird Bio and Bristol-Myers Squibb. Dr. Patel has served on the advisory board for Janssen and Bristol-Myers Squibb. She also reports a speaking engagement with Oncopeptides. Dr. Munshi acts as a consultant for several pharmaceutical companies, and many coauthors also have relationships with industry, as listed in the original article.

A version of this article first appeared on Medscape.com.

Women living in rural areas were significantly more likely than were those in urban areas to receive inappropriate antibiotic prescriptions for urinary tract infections, based on data from an observational cohort study of more than 600,000 women.

Uncomplicated urinary tract infections (UTIs) are common among otherwise healthy women in the United States, and certain antibiotics are recommended as first-line therapy, wrote Abbye W. Clark, MD, of Washington University, St. Louis, and colleagues.

“However, the majority of antibiotic prescriptions for uncomplicated UTI are suboptimal because they are written for nonrecommended agents and durations,” they said.

Addressing rural health disparities has become a focus in the United States, and previous studies of respiratory tract infections have shown differences in antibiotic prescribing based on geographic region; “however, no large-scale studies have evaluated rural-urban differences in inappropriate outpatient prescribing for UTI,” they added.

In a study published in Infection Control & Hospital Epidemiology, the researchers identified 670,450 women aged 18-44 years who received oral antibiotics for uncomplicated UTIs between 2010 to 2015, using a commercial insurance database to determine diagnosis and antibiotic prescription information. Women were defined as urban if they lived in a metropolitan statistical area of at least 50,000 inhabitants (86.2%); all other women were defined as rural (13.8%). The median age was 30 years for both groups.

Overall, 46.7% of the women received prescriptions for inappropriate antibiotics, and 76.1% received antibiotics for inappropriate durations.

Antibiotics and durations were defined as appropriate or inappropriate based on current clinical guidelines. “We classified first-line agents (nitrofurantoin, TMP-SMX, fosfomycin) as appropriate and non–first-line agents (fluoroquinolones, beta-lactams) as inappropriate,” the researchers said.

The regimens classified as appropriate duration were “nitrofurantoin 5-day regimen, TMP-SMX (including TMP monotherapy) 3-day regimen, fosfomycin 1-day regimen, fluoroquinolones 3-day regimen, and beta-lactams 3- to 7-day regimen. All other regimens were classified as inappropriate duration,” they noted.
 

More rural women receive long-duration antibiotics

In a multivariate analysis, similar percentages of antibiotics for rural and urban women consisted of inappropriate agents (45.9% vs. 46.9%) including use of fluoroquinolones (41.0% vs. 41.7%) and beta-lactams (4.8% vs. 5.0%).

However, across all antibiotics, women in rural areas were more likely than were women in urban areas to receive prescriptions for inappropriately long durations (83.9% vs. 75.9%, adjusted risk ratio 1.10).

The percentage of women who received inappropriate antibiotic agents was not significantly different based on geographic region of the country.

From 2011 to 2015, the quarterly proportion of women overall who received inappropriate agents and antibiotics for inappropriate durations decreased slightly (48.5% to 43.7% and 78.3% to 73.4%, respectively), the researchers noted.

The study findings were limited by several factors including the potentially lenient definition of antibiotic duration, a study population that disproportionately oversampled from the South and undersampled from the West, use of ZIP codes to determine rural vs. urban status, lack of data on race and income, and lack of access to urine culture results, the researchers noted.

However, “our study identified rural-urban differences in antibiotic prescribing, including an actionable disparity in the duration of antibiotics that disproportionately affects women who live in rural locations,” they said.

“Given the large quantity of inappropriate prescriptions annually in the U.S., as well as the negative patient- and society-level consequences of unnecessary exposure to antibiotics, antimicrobial stewardship interventions are needed to improve outpatient UTI antibiotic prescribing, particularly in rural settings,” they concluded.
 

Data support need for education and stewardship

“This manuscript provides valuable information to all women’s health providers regarding the importance of antibiotic stewardship,” David M. Jaspan, DO, and Natasha Abdullah, MD, Einstein Medical Center, Philadelphia, said in an interview. Whether urban or rural, over 45% of the patients received inappropriate non–first-line treatment and 76% of the prescriptions were for an inappropriate duration (98.8% for longer than recommended), they emphasized.

“The potential negative impact of antibiotic resistance, coupled with the potential for increased side effects, should prompt providers to ensure that when treating uncomplicated UTIs in women, that the choice of treatment and the duration of treatment is tailored to the patient’s needs,” the Dr. Jaspan and Dr. Abdullah said.

To improve antibiotic prescribing, especially at the local and regional level, “We encourage providers to familiarize themselves with local information as it pertains to known resistance when prescribing empiric treatment regimens for uncomplicated UTIs,” they said.

The study was supported by the National Center for Advancing Translational Sciences at the National Institutes of Health. Lead author Dr. Clark, as well as Dr. Jaspan and Dr. Abdullah, had no financial conflicts to disclose.

Women living in rural areas were significantly more likely than were those in urban areas to receive inappropriate antibiotic prescriptions for urinary tract infections, based on data from an observational cohort study of more than 600,000 women.

Uncomplicated urinary tract infections (UTIs) are common among otherwise healthy women in the United States, and certain antibiotics are recommended as first-line therapy, wrote Abbye W. Clark, MD, of Washington University, St. Louis, and colleagues.

“However, the majority of antibiotic prescriptions for uncomplicated UTI are suboptimal because they are written for nonrecommended agents and durations,” they said.

Addressing rural health disparities has become a focus in the United States, and previous studies of respiratory tract infections have shown differences in antibiotic prescribing based on geographic region; “however, no large-scale studies have evaluated rural-urban differences in inappropriate outpatient prescribing for UTI,” they added.

In a study published in Infection Control & Hospital Epidemiology, the researchers identified 670,450 women aged 18-44 years who received oral antibiotics for uncomplicated UTIs between 2010 to 2015, using a commercial insurance database to determine diagnosis and antibiotic prescription information. Women were defined as urban if they lived in a metropolitan statistical area of at least 50,000 inhabitants (86.2%); all other women were defined as rural (13.8%). The median age was 30 years for both groups.

Overall, 46.7% of the women received prescriptions for inappropriate antibiotics, and 76.1% received antibiotics for inappropriate durations.

Antibiotics and durations were defined as appropriate or inappropriate based on current clinical guidelines. “We classified first-line agents (nitrofurantoin, TMP-SMX, fosfomycin) as appropriate and non–first-line agents (fluoroquinolones, beta-lactams) as inappropriate,” the researchers said.

The regimens classified as appropriate duration were “nitrofurantoin 5-day regimen, TMP-SMX (including TMP monotherapy) 3-day regimen, fosfomycin 1-day regimen, fluoroquinolones 3-day regimen, and beta-lactams 3- to 7-day regimen. All other regimens were classified as inappropriate duration,” they noted.
 

More rural women receive long-duration antibiotics

In a multivariate analysis, similar percentages of antibiotics for rural and urban women consisted of inappropriate agents (45.9% vs. 46.9%) including use of fluoroquinolones (41.0% vs. 41.7%) and beta-lactams (4.8% vs. 5.0%).

However, across all antibiotics, women in rural areas were more likely than were women in urban areas to receive prescriptions for inappropriately long durations (83.9% vs. 75.9%, adjusted risk ratio 1.10).

The percentage of women who received inappropriate antibiotic agents was not significantly different based on geographic region of the country.

From 2011 to 2015, the quarterly proportion of women overall who received inappropriate agents and antibiotics for inappropriate durations decreased slightly (48.5% to 43.7% and 78.3% to 73.4%, respectively), the researchers noted.

The study findings were limited by several factors including the potentially lenient definition of antibiotic duration, a study population that disproportionately oversampled from the South and undersampled from the West, use of ZIP codes to determine rural vs. urban status, lack of data on race and income, and lack of access to urine culture results, the researchers noted.

However, “our study identified rural-urban differences in antibiotic prescribing, including an actionable disparity in the duration of antibiotics that disproportionately affects women who live in rural locations,” they said.

“Given the large quantity of inappropriate prescriptions annually in the U.S., as well as the negative patient- and society-level consequences of unnecessary exposure to antibiotics, antimicrobial stewardship interventions are needed to improve outpatient UTI antibiotic prescribing, particularly in rural settings,” they concluded.
 

Data support need for education and stewardship

“This manuscript provides valuable information to all women’s health providers regarding the importance of antibiotic stewardship,” David M. Jaspan, DO, and Natasha Abdullah, MD, Einstein Medical Center, Philadelphia, said in an interview. Whether urban or rural, over 45% of the patients received inappropriate non–first-line treatment and 76% of the prescriptions were for an inappropriate duration (98.8% for longer than recommended), they emphasized.

“The potential negative impact of antibiotic resistance, coupled with the potential for increased side effects, should prompt providers to ensure that when treating uncomplicated UTIs in women, that the choice of treatment and the duration of treatment is tailored to the patient’s needs,” the Dr. Jaspan and Dr. Abdullah said.

To improve antibiotic prescribing, especially at the local and regional level, “We encourage providers to familiarize themselves with local information as it pertains to known resistance when prescribing empiric treatment regimens for uncomplicated UTIs,” they said.

The study was supported by the National Center for Advancing Translational Sciences at the National Institutes of Health. Lead author Dr. Clark, as well as Dr. Jaspan and Dr. Abdullah, had no financial conflicts to disclose.

Women living in rural areas were significantly more likely than were those in urban areas to receive inappropriate antibiotic prescriptions for urinary tract infections, based on data from an observational cohort study of more than 600,000 women.

Uncomplicated urinary tract infections (UTIs) are common among otherwise healthy women in the United States, and certain antibiotics are recommended as first-line therapy, wrote Abbye W. Clark, MD, of Washington University, St. Louis, and colleagues.

“However, the majority of antibiotic prescriptions for uncomplicated UTI are suboptimal because they are written for nonrecommended agents and durations,” they said.

Addressing rural health disparities has become a focus in the United States, and previous studies of respiratory tract infections have shown differences in antibiotic prescribing based on geographic region; “however, no large-scale studies have evaluated rural-urban differences in inappropriate outpatient prescribing for UTI,” they added.

In a study published in Infection Control & Hospital Epidemiology, the researchers identified 670,450 women aged 18-44 years who received oral antibiotics for uncomplicated UTIs between 2010 to 2015, using a commercial insurance database to determine diagnosis and antibiotic prescription information. Women were defined as urban if they lived in a metropolitan statistical area of at least 50,000 inhabitants (86.2%); all other women were defined as rural (13.8%). The median age was 30 years for both groups.

Overall, 46.7% of the women received prescriptions for inappropriate antibiotics, and 76.1% received antibiotics for inappropriate durations.

Antibiotics and durations were defined as appropriate or inappropriate based on current clinical guidelines. “We classified first-line agents (nitrofurantoin, TMP-SMX, fosfomycin) as appropriate and non–first-line agents (fluoroquinolones, beta-lactams) as inappropriate,” the researchers said.

The regimens classified as appropriate duration were “nitrofurantoin 5-day regimen, TMP-SMX (including TMP monotherapy) 3-day regimen, fosfomycin 1-day regimen, fluoroquinolones 3-day regimen, and beta-lactams 3- to 7-day regimen. All other regimens were classified as inappropriate duration,” they noted.
 

More rural women receive long-duration antibiotics

In a multivariate analysis, similar percentages of antibiotics for rural and urban women consisted of inappropriate agents (45.9% vs. 46.9%) including use of fluoroquinolones (41.0% vs. 41.7%) and beta-lactams (4.8% vs. 5.0%).

However, across all antibiotics, women in rural areas were more likely than were women in urban areas to receive prescriptions for inappropriately long durations (83.9% vs. 75.9%, adjusted risk ratio 1.10).

The percentage of women who received inappropriate antibiotic agents was not significantly different based on geographic region of the country.

From 2011 to 2015, the quarterly proportion of women overall who received inappropriate agents and antibiotics for inappropriate durations decreased slightly (48.5% to 43.7% and 78.3% to 73.4%, respectively), the researchers noted.

The study findings were limited by several factors including the potentially lenient definition of antibiotic duration, a study population that disproportionately oversampled from the South and undersampled from the West, use of ZIP codes to determine rural vs. urban status, lack of data on race and income, and lack of access to urine culture results, the researchers noted.

However, “our study identified rural-urban differences in antibiotic prescribing, including an actionable disparity in the duration of antibiotics that disproportionately affects women who live in rural locations,” they said.

“Given the large quantity of inappropriate prescriptions annually in the U.S., as well as the negative patient- and society-level consequences of unnecessary exposure to antibiotics, antimicrobial stewardship interventions are needed to improve outpatient UTI antibiotic prescribing, particularly in rural settings,” they concluded.
 

Data support need for education and stewardship

“This manuscript provides valuable information to all women’s health providers regarding the importance of antibiotic stewardship,” David M. Jaspan, DO, and Natasha Abdullah, MD, Einstein Medical Center, Philadelphia, said in an interview. Whether urban or rural, over 45% of the patients received inappropriate non–first-line treatment and 76% of the prescriptions were for an inappropriate duration (98.8% for longer than recommended), they emphasized.

“The potential negative impact of antibiotic resistance, coupled with the potential for increased side effects, should prompt providers to ensure that when treating uncomplicated UTIs in women, that the choice of treatment and the duration of treatment is tailored to the patient’s needs,” the Dr. Jaspan and Dr. Abdullah said.

To improve antibiotic prescribing, especially at the local and regional level, “We encourage providers to familiarize themselves with local information as it pertains to known resistance when prescribing empiric treatment regimens for uncomplicated UTIs,” they said.

The study was supported by the National Center for Advancing Translational Sciences at the National Institutes of Health. Lead author Dr. Clark, as well as Dr. Jaspan and Dr. Abdullah, had no financial conflicts to disclose.

Exercise training – but not testosterone therapy – improved vascular health in aging men with widening midsections and low to normal testosterone, new research suggests.

kali9/iStockphoto.com

“Previous studies have suggested that men with higher levels of testosterone, who were more physically active, might have better health outcomes,” Bu Beng Yeap, MBBS, PhD, University of Western Australia, Perth, said in an interview. “We formulated the hypothesis that the combination of testosterone treatment and exercise training would improve the health of arteries more than either alone.”

To test this hypothesis, the investigators randomly assigned 80 men, aged 50-70 years, to 12 weeks of 5% testosterone cream 2 mL applied daily or placebo plus a supervised exercise program that included machine-based resistance and aerobic (cycling) exercises two to three times a week or no additional exercise.

The men (mean age, 59 years) had low-normal testosterone (6-14 nmol/L), a waist circumference of at least 95 cm (37.4 inches), and no known cardiovascular disease (CVD), type 1 diabetes, or other clinically significant illnesses. Current smokers and men on testosterone or medications that would alter testosterone levels were also excluded.

High-resolution ultrasound of the brachial artery was used to assess flow-mediated dilation (FMD) and sublingual glyceryl trinitrate (GTN) responses. FMD has been shown to be predictive of CVD risk, with a 1% increase in FMD associated with a 9%-13% decrease in future CVD events.

Based on participants’ daily dairies, testosterone adherence was 97.6%. Exercise adherence was 96.5% for twice-weekly attendance and 80.0% for thrice-weekly attendance, with no between-group differences.

As reported Feb. 22, 2021, in Hypertension, testosterone levels increased, on average, 3.0 nmol/L in both testosterone groups by week 12 (P = .003). In all, 62% of these men had levels of the hormone exceeding 14 nmol/L, compared with 29% of those receiving placebo.

Testosterone levels improved with exercise training plus placebo by 0.9 nmol/L, but fell with no exercise and placebo by 0.9 nmol/L.

In terms of vascular function, exercise training increased FMD when expressed as both the delta change (mm; P = .004) and relative rise from baseline diameter (%; P = .033).

There was no effect of exercise on GTN%, which is generally in line with exercise literature indicating that shear-mediated adaptations in response to episodic exercise occur largely in endothelial cells, the authors noted.

Testosterone did not affect any measures of FMD nor was there an effect on GTN response, despite previous evidence that lower testosterone doses might enhance smooth muscle function.

“Our main finding was that testosterone – at this dose over this duration of treatment – did not have a beneficial effect on artery health, nor did it enhance the effect of exercise,” said Dr. Yeap, who is also president of the Endocrine Society of Australia. “For middle-aged and older men wanting to improve the health of their arteries, exercise is better than testosterone!”

Shalender Bhasin, MBBS, director of research programs in men’s health, aging, and metabolism at Brigham and Women’s Hospital and professor of medicine at Harvard Medical School, both in Boston, said the study is interesting from a mechanistic perspective and adds to the overall body of evidence on how testosterone affects performance, but was narrowly focused.

“They looked at very specific markers and what they’re showing is that this is not the mechanism by which testosterone improves performance,” he said. “That may be so, but it doesn’t negate the finding that testosterone improves endurance and has other vascular effects: it increases capillarity, increases blood flow to the tissues, and improves myocardial function.”

Although well done, the study doesn’t get at the larger question of whether testosterone increases cardiovascular risk, observed Dr. Bhasin. “None of the randomized studies have been large enough or long enough to determine the effect on cardiovascular events rates. There’s a lot of argument on both sides but we need some data to address that.”

The 6,000-patient TRAVERSE trial is specifically looking at long-term major cardiovascular events with topical testosterone, compared with placebo, in hypogonadal men aged 45-80 years age who have evidence of or are at increased risk for CVD. The study, which is set to be completed in April 2022, should also provide information on fracture risk in these men, said Dr. Bhasin, one of the trial’s principal investigators and lead author of the Endocrine Society’s 2018 clinical practice guideline on testosterone therapy for hypogonadism in men.

William Evans, MD, adjunct professor of human nutrition, University of California, Berkley, said in an interview that the positive effects of testosterone occur at much lower doses in men and women who are hypogonadal but, in this particular population, exercise is the key and the major recommendation.

“Testosterone has been overprescribed and overadvertised for essentially a lifetime of sedentary living, and it’s advertised as a way to get all that back without having to work for it,” he said. “Exercise has a profound and positive effect on control of blood pressure, function, and strength, and testosterone may only affect in people who are sick, people who have really low levels.”

The study was funded by the Heart Foundation of Australia. Lawley Pharmaceuticals provided the study medication and placebo. Dr. Yeap has received speaker honoraria and conference support from Bayer, Eli Lilly, and Besins Healthcare; research support from Bayer, Lily, and Lawley; and served as an adviser for Lily, Besins Healthcare, Ferring, and Lawley. Dr. Shalender reports consultation or advisement for GTx, Pfizer, and TAP; grant or other research support from Solvay and GlaxoSmithKline; and honoraria from Solvay and Auxilium. Dr. Evans reported having no relevant conflicts of interest.

A version of this article first appeared on Medscape.com.

Exercise training – but not testosterone therapy – improved vascular health in aging men with widening midsections and low to normal testosterone, new research suggests.

kali9/iStockphoto.com

“Previous studies have suggested that men with higher levels of testosterone, who were more physically active, might have better health outcomes,” Bu Beng Yeap, MBBS, PhD, University of Western Australia, Perth, said in an interview. “We formulated the hypothesis that the combination of testosterone treatment and exercise training would improve the health of arteries more than either alone.”

To test this hypothesis, the investigators randomly assigned 80 men, aged 50-70 years, to 12 weeks of 5% testosterone cream 2 mL applied daily or placebo plus a supervised exercise program that included machine-based resistance and aerobic (cycling) exercises two to three times a week or no additional exercise.

The men (mean age, 59 years) had low-normal testosterone (6-14 nmol/L), a waist circumference of at least 95 cm (37.4 inches), and no known cardiovascular disease (CVD), type 1 diabetes, or other clinically significant illnesses. Current smokers and men on testosterone or medications that would alter testosterone levels were also excluded.

High-resolution ultrasound of the brachial artery was used to assess flow-mediated dilation (FMD) and sublingual glyceryl trinitrate (GTN) responses. FMD has been shown to be predictive of CVD risk, with a 1% increase in FMD associated with a 9%-13% decrease in future CVD events.

Based on participants’ daily dairies, testosterone adherence was 97.6%. Exercise adherence was 96.5% for twice-weekly attendance and 80.0% for thrice-weekly attendance, with no between-group differences.

As reported Feb. 22, 2021, in Hypertension, testosterone levels increased, on average, 3.0 nmol/L in both testosterone groups by week 12 (P = .003). In all, 62% of these men had levels of the hormone exceeding 14 nmol/L, compared with 29% of those receiving placebo.

Testosterone levels improved with exercise training plus placebo by 0.9 nmol/L, but fell with no exercise and placebo by 0.9 nmol/L.

In terms of vascular function, exercise training increased FMD when expressed as both the delta change (mm; P = .004) and relative rise from baseline diameter (%; P = .033).

There was no effect of exercise on GTN%, which is generally in line with exercise literature indicating that shear-mediated adaptations in response to episodic exercise occur largely in endothelial cells, the authors noted.

Testosterone did not affect any measures of FMD nor was there an effect on GTN response, despite previous evidence that lower testosterone doses might enhance smooth muscle function.

“Our main finding was that testosterone – at this dose over this duration of treatment – did not have a beneficial effect on artery health, nor did it enhance the effect of exercise,” said Dr. Yeap, who is also president of the Endocrine Society of Australia. “For middle-aged and older men wanting to improve the health of their arteries, exercise is better than testosterone!”

Shalender Bhasin, MBBS, director of research programs in men’s health, aging, and metabolism at Brigham and Women’s Hospital and professor of medicine at Harvard Medical School, both in Boston, said the study is interesting from a mechanistic perspective and adds to the overall body of evidence on how testosterone affects performance, but was narrowly focused.

“They looked at very specific markers and what they’re showing is that this is not the mechanism by which testosterone improves performance,” he said. “That may be so, but it doesn’t negate the finding that testosterone improves endurance and has other vascular effects: it increases capillarity, increases blood flow to the tissues, and improves myocardial function.”

Although well done, the study doesn’t get at the larger question of whether testosterone increases cardiovascular risk, observed Dr. Bhasin. “None of the randomized studies have been large enough or long enough to determine the effect on cardiovascular events rates. There’s a lot of argument on both sides but we need some data to address that.”

The 6,000-patient TRAVERSE trial is specifically looking at long-term major cardiovascular events with topical testosterone, compared with placebo, in hypogonadal men aged 45-80 years age who have evidence of or are at increased risk for CVD. The study, which is set to be completed in April 2022, should also provide information on fracture risk in these men, said Dr. Bhasin, one of the trial’s principal investigators and lead author of the Endocrine Society’s 2018 clinical practice guideline on testosterone therapy for hypogonadism in men.

William Evans, MD, adjunct professor of human nutrition, University of California, Berkley, said in an interview that the positive effects of testosterone occur at much lower doses in men and women who are hypogonadal but, in this particular population, exercise is the key and the major recommendation.

“Testosterone has been overprescribed and overadvertised for essentially a lifetime of sedentary living, and it’s advertised as a way to get all that back without having to work for it,” he said. “Exercise has a profound and positive effect on control of blood pressure, function, and strength, and testosterone may only affect in people who are sick, people who have really low levels.”

The study was funded by the Heart Foundation of Australia. Lawley Pharmaceuticals provided the study medication and placebo. Dr. Yeap has received speaker honoraria and conference support from Bayer, Eli Lilly, and Besins Healthcare; research support from Bayer, Lily, and Lawley; and served as an adviser for Lily, Besins Healthcare, Ferring, and Lawley. Dr. Shalender reports consultation or advisement for GTx, Pfizer, and TAP; grant or other research support from Solvay and GlaxoSmithKline; and honoraria from Solvay and Auxilium. Dr. Evans reported having no relevant conflicts of interest.

A version of this article first appeared on Medscape.com.

Exercise training – but not testosterone therapy – improved vascular health in aging men with widening midsections and low to normal testosterone, new research suggests.

kali9/iStockphoto.com

“Previous studies have suggested that men with higher levels of testosterone, who were more physically active, might have better health outcomes,” Bu Beng Yeap, MBBS, PhD, University of Western Australia, Perth, said in an interview. “We formulated the hypothesis that the combination of testosterone treatment and exercise training would improve the health of arteries more than either alone.”

To test this hypothesis, the investigators randomly assigned 80 men, aged 50-70 years, to 12 weeks of 5% testosterone cream 2 mL applied daily or placebo plus a supervised exercise program that included machine-based resistance and aerobic (cycling) exercises two to three times a week or no additional exercise.

The men (mean age, 59 years) had low-normal testosterone (6-14 nmol/L), a waist circumference of at least 95 cm (37.4 inches), and no known cardiovascular disease (CVD), type 1 diabetes, or other clinically significant illnesses. Current smokers and men on testosterone or medications that would alter testosterone levels were also excluded.

High-resolution ultrasound of the brachial artery was used to assess flow-mediated dilation (FMD) and sublingual glyceryl trinitrate (GTN) responses. FMD has been shown to be predictive of CVD risk, with a 1% increase in FMD associated with a 9%-13% decrease in future CVD events.

Based on participants’ daily dairies, testosterone adherence was 97.6%. Exercise adherence was 96.5% for twice-weekly attendance and 80.0% for thrice-weekly attendance, with no between-group differences.

As reported Feb. 22, 2021, in Hypertension, testosterone levels increased, on average, 3.0 nmol/L in both testosterone groups by week 12 (P = .003). In all, 62% of these men had levels of the hormone exceeding 14 nmol/L, compared with 29% of those receiving placebo.

Testosterone levels improved with exercise training plus placebo by 0.9 nmol/L, but fell with no exercise and placebo by 0.9 nmol/L.

In terms of vascular function, exercise training increased FMD when expressed as both the delta change (mm; P = .004) and relative rise from baseline diameter (%; P = .033).

There was no effect of exercise on GTN%, which is generally in line with exercise literature indicating that shear-mediated adaptations in response to episodic exercise occur largely in endothelial cells, the authors noted.

Testosterone did not affect any measures of FMD nor was there an effect on GTN response, despite previous evidence that lower testosterone doses might enhance smooth muscle function.

“Our main finding was that testosterone – at this dose over this duration of treatment – did not have a beneficial effect on artery health, nor did it enhance the effect of exercise,” said Dr. Yeap, who is also president of the Endocrine Society of Australia. “For middle-aged and older men wanting to improve the health of their arteries, exercise is better than testosterone!”

Shalender Bhasin, MBBS, director of research programs in men’s health, aging, and metabolism at Brigham and Women’s Hospital and professor of medicine at Harvard Medical School, both in Boston, said the study is interesting from a mechanistic perspective and adds to the overall body of evidence on how testosterone affects performance, but was narrowly focused.

“They looked at very specific markers and what they’re showing is that this is not the mechanism by which testosterone improves performance,” he said. “That may be so, but it doesn’t negate the finding that testosterone improves endurance and has other vascular effects: it increases capillarity, increases blood flow to the tissues, and improves myocardial function.”

Although well done, the study doesn’t get at the larger question of whether testosterone increases cardiovascular risk, observed Dr. Bhasin. “None of the randomized studies have been large enough or long enough to determine the effect on cardiovascular events rates. There’s a lot of argument on both sides but we need some data to address that.”

The 6,000-patient TRAVERSE trial is specifically looking at long-term major cardiovascular events with topical testosterone, compared with placebo, in hypogonadal men aged 45-80 years age who have evidence of or are at increased risk for CVD. The study, which is set to be completed in April 2022, should also provide information on fracture risk in these men, said Dr. Bhasin, one of the trial’s principal investigators and lead author of the Endocrine Society’s 2018 clinical practice guideline on testosterone therapy for hypogonadism in men.

William Evans, MD, adjunct professor of human nutrition, University of California, Berkley, said in an interview that the positive effects of testosterone occur at much lower doses in men and women who are hypogonadal but, in this particular population, exercise is the key and the major recommendation.

“Testosterone has been overprescribed and overadvertised for essentially a lifetime of sedentary living, and it’s advertised as a way to get all that back without having to work for it,” he said. “Exercise has a profound and positive effect on control of blood pressure, function, and strength, and testosterone may only affect in people who are sick, people who have really low levels.”

The study was funded by the Heart Foundation of Australia. Lawley Pharmaceuticals provided the study medication and placebo. Dr. Yeap has received speaker honoraria and conference support from Bayer, Eli Lilly, and Besins Healthcare; research support from Bayer, Lily, and Lawley; and served as an adviser for Lily, Besins Healthcare, Ferring, and Lawley. Dr. Shalender reports consultation or advisement for GTx, Pfizer, and TAP; grant or other research support from Solvay and GlaxoSmithKline; and honoraria from Solvay and Auxilium. Dr. Evans reported having no relevant conflicts of interest.

A version of this article first appeared on Medscape.com.