Literature Review

Citing the strong overlap between heart disease, kidney disease, type 2 diabetes, and obesity, the American Heart Association has for the first time formally defined what they are calling cardiovascular-kidney-metabolic (CKM) syndrome.

“This work was prompted by the fact that CKM syndrome leads to premature morbidity and mortality, primarily because of a higher burden of CVD,” writing committee chair Chiadi Ndumele, MD, PhD, said in an interview.

“While CKM syndrome is a public health emergency, there is also great potential for improving CKM health in the population, with an increasing number of therapies that favorably impact metabolic risk factors, risk for adverse kidney events, or both, which also protect against CVD,” added Dr. Ndumele, director of obesity and cardiometabolic research in the division of cardiology at Johns Hopkins University, Baltimore.

The AHA presidential advisory and accompanying scientific statement, which provides a synopsis of evidence for the science and clinical management of CKM, were published online in the journal Circulation.
 

CKM syndrome staging

According to the AHA, one in three U.S. adults have three or more risk factors that contribute to CVD, metabolic disorders, and/or kidney disease.

In addition to defining CKM syndrome, the advisory provides a “staging construct, to be used in both adults and youth, that reflects the progressive pathophysiology and risk within CKM syndrome, with therapeutic guidance tied to CKM stages,” Dr. Ndumele told this news organization.

The AHA outlines four stages of CKM syndrome:

Stage 0: At this stage, no CKM risk factors are present, and the goal is to prevent CKM syndrome (particularly unhealthy weight gain) by achieving and maintaining ideal health based on the AHA’s Life’s Essential 8 recommendations. Adults in this stage should be screened every 3-5 years to assess lipids, blood pressure, and blood sugar.

Stage 1: At this stage, excess weight, abdominal obesity, or dysfunctional adipose tissue (clinically manifest as impaired glucose tolerance or prediabetes) is present without other metabolic risk factors or CVD. Management includes providing support for healthy lifestyle changes (healthy eating and regular physical activity), with a goal of at least 5% weight loss and addressing glucose intolerance if needed. Screening adults with stage 1 CKM every 2-3 years is advised to assess blood pressure, triglycerides, cholesterol, and blood sugar.

Stage 2: At this stage, metabolic risk factors (hypertriglyceridemia, hypertension, metabolic syndrome, diabetes) and kidney disease are present. The goal is to address risk factors to prevent progression to CVD and kidney failure. Screening for stage 2 CKM syndrome aligns with AHA/ACC guidelines, which include yearly assessment of blood pressure, triglycerides, cholesterol, blood sugar, and kidney function. More frequent kidney screening is recommended for individuals with increased risk of kidney failure based on kidney function assessments.

Stage 3: This stage describes individuals with subclinical CVD with metabolic risk factors or kidney disease or those at high predicted risk for CVD. The goal is to intensify efforts to prevent progression to symptomatic CVD and kidney failure. This may involve increasing or changing medications, and additional focus on lifestyle changes. Coronary artery calcium (CAC) measurement in some adults is recommended to assess narrowing of the arteries when treatment decisions are unclear.

Stage 4: Individuals with stage 4 CKM syndrome have symptomatic CVD, excess body fat, metabolic risk factors, or kidney disease. Stage 4 CKM syndrome is divided into two subcategories: (4a) no kidney failure and (4b) kidney failure. In this stage, patients may have already had a myocardial infarction (MI) or stroke or may already have heart failure. They also may have additional CV conditions such as peripheral artery disease or atrial fibrillation. The goal of care is individualized treatment for CVD with consideration for CKM syndrome conditions.

The advisory also describes CKM syndrome regression, “an important concept and public health message in which people making healthy lifestyle changes and achieving weight loss may regress to lower CKM syndrome stages and a better state of health,” the AHA says in a news release.

They note that a “critical” next step is to update the pooled cohort equation (PCE) risk prediction algorithm to include measures of kidney function, type 2 diabetes control, and social determinants of health for a more comprehensive risk estimate.

The advisory also recommends risk calculator updates be expanded to assess risk in people as young as age 30 and to calculate both 10- and 30-year CVD risk.

“Clearly defining the patient with CKM syndrome, and providing new approaches for CKM syndrome staging and risk prediction, will help health care professionals to identify these individuals earlier and to provide timely, holistic, and patient-centered care,” Dr. Ndumele said.

This presidential advisory was prepared by the volunteer writing group on behalf of the AHA . The authors have reported no relevant financial relationships.

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

Citing the strong overlap between heart disease, kidney disease, type 2 diabetes, and obesity, the American Heart Association has for the first time formally defined what they are calling cardiovascular-kidney-metabolic (CKM) syndrome.

“This work was prompted by the fact that CKM syndrome leads to premature morbidity and mortality, primarily because of a higher burden of CVD,” writing committee chair Chiadi Ndumele, MD, PhD, said in an interview.

“While CKM syndrome is a public health emergency, there is also great potential for improving CKM health in the population, with an increasing number of therapies that favorably impact metabolic risk factors, risk for adverse kidney events, or both, which also protect against CVD,” added Dr. Ndumele, director of obesity and cardiometabolic research in the division of cardiology at Johns Hopkins University, Baltimore.

The AHA presidential advisory and accompanying scientific statement, which provides a synopsis of evidence for the science and clinical management of CKM, were published online in the journal Circulation.
 

CKM syndrome staging

According to the AHA, one in three U.S. adults have three or more risk factors that contribute to CVD, metabolic disorders, and/or kidney disease.

In addition to defining CKM syndrome, the advisory provides a “staging construct, to be used in both adults and youth, that reflects the progressive pathophysiology and risk within CKM syndrome, with therapeutic guidance tied to CKM stages,” Dr. Ndumele told this news organization.

The AHA outlines four stages of CKM syndrome:

Stage 0: At this stage, no CKM risk factors are present, and the goal is to prevent CKM syndrome (particularly unhealthy weight gain) by achieving and maintaining ideal health based on the AHA’s Life’s Essential 8 recommendations. Adults in this stage should be screened every 3-5 years to assess lipids, blood pressure, and blood sugar.

Stage 1: At this stage, excess weight, abdominal obesity, or dysfunctional adipose tissue (clinically manifest as impaired glucose tolerance or prediabetes) is present without other metabolic risk factors or CVD. Management includes providing support for healthy lifestyle changes (healthy eating and regular physical activity), with a goal of at least 5% weight loss and addressing glucose intolerance if needed. Screening adults with stage 1 CKM every 2-3 years is advised to assess blood pressure, triglycerides, cholesterol, and blood sugar.

Stage 2: At this stage, metabolic risk factors (hypertriglyceridemia, hypertension, metabolic syndrome, diabetes) and kidney disease are present. The goal is to address risk factors to prevent progression to CVD and kidney failure. Screening for stage 2 CKM syndrome aligns with AHA/ACC guidelines, which include yearly assessment of blood pressure, triglycerides, cholesterol, blood sugar, and kidney function. More frequent kidney screening is recommended for individuals with increased risk of kidney failure based on kidney function assessments.

Stage 3: This stage describes individuals with subclinical CVD with metabolic risk factors or kidney disease or those at high predicted risk for CVD. The goal is to intensify efforts to prevent progression to symptomatic CVD and kidney failure. This may involve increasing or changing medications, and additional focus on lifestyle changes. Coronary artery calcium (CAC) measurement in some adults is recommended to assess narrowing of the arteries when treatment decisions are unclear.

Stage 4: Individuals with stage 4 CKM syndrome have symptomatic CVD, excess body fat, metabolic risk factors, or kidney disease. Stage 4 CKM syndrome is divided into two subcategories: (4a) no kidney failure and (4b) kidney failure. In this stage, patients may have already had a myocardial infarction (MI) or stroke or may already have heart failure. They also may have additional CV conditions such as peripheral artery disease or atrial fibrillation. The goal of care is individualized treatment for CVD with consideration for CKM syndrome conditions.

The advisory also describes CKM syndrome regression, “an important concept and public health message in which people making healthy lifestyle changes and achieving weight loss may regress to lower CKM syndrome stages and a better state of health,” the AHA says in a news release.

They note that a “critical” next step is to update the pooled cohort equation (PCE) risk prediction algorithm to include measures of kidney function, type 2 diabetes control, and social determinants of health for a more comprehensive risk estimate.

The advisory also recommends risk calculator updates be expanded to assess risk in people as young as age 30 and to calculate both 10- and 30-year CVD risk.

“Clearly defining the patient with CKM syndrome, and providing new approaches for CKM syndrome staging and risk prediction, will help health care professionals to identify these individuals earlier and to provide timely, holistic, and patient-centered care,” Dr. Ndumele said.

This presidential advisory was prepared by the volunteer writing group on behalf of the AHA . The authors have reported no relevant financial relationships.

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

Citing the strong overlap between heart disease, kidney disease, type 2 diabetes, and obesity, the American Heart Association has for the first time formally defined what they are calling cardiovascular-kidney-metabolic (CKM) syndrome.

“This work was prompted by the fact that CKM syndrome leads to premature morbidity and mortality, primarily because of a higher burden of CVD,” writing committee chair Chiadi Ndumele, MD, PhD, said in an interview.

“While CKM syndrome is a public health emergency, there is also great potential for improving CKM health in the population, with an increasing number of therapies that favorably impact metabolic risk factors, risk for adverse kidney events, or both, which also protect against CVD,” added Dr. Ndumele, director of obesity and cardiometabolic research in the division of cardiology at Johns Hopkins University, Baltimore.

The AHA presidential advisory and accompanying scientific statement, which provides a synopsis of evidence for the science and clinical management of CKM, were published online in the journal Circulation.
 

CKM syndrome staging

According to the AHA, one in three U.S. adults have three or more risk factors that contribute to CVD, metabolic disorders, and/or kidney disease.

In addition to defining CKM syndrome, the advisory provides a “staging construct, to be used in both adults and youth, that reflects the progressive pathophysiology and risk within CKM syndrome, with therapeutic guidance tied to CKM stages,” Dr. Ndumele told this news organization.

The AHA outlines four stages of CKM syndrome:

Stage 0: At this stage, no CKM risk factors are present, and the goal is to prevent CKM syndrome (particularly unhealthy weight gain) by achieving and maintaining ideal health based on the AHA’s Life’s Essential 8 recommendations. Adults in this stage should be screened every 3-5 years to assess lipids, blood pressure, and blood sugar.

Stage 1: At this stage, excess weight, abdominal obesity, or dysfunctional adipose tissue (clinically manifest as impaired glucose tolerance or prediabetes) is present without other metabolic risk factors or CVD. Management includes providing support for healthy lifestyle changes (healthy eating and regular physical activity), with a goal of at least 5% weight loss and addressing glucose intolerance if needed. Screening adults with stage 1 CKM every 2-3 years is advised to assess blood pressure, triglycerides, cholesterol, and blood sugar.

Stage 2: At this stage, metabolic risk factors (hypertriglyceridemia, hypertension, metabolic syndrome, diabetes) and kidney disease are present. The goal is to address risk factors to prevent progression to CVD and kidney failure. Screening for stage 2 CKM syndrome aligns with AHA/ACC guidelines, which include yearly assessment of blood pressure, triglycerides, cholesterol, blood sugar, and kidney function. More frequent kidney screening is recommended for individuals with increased risk of kidney failure based on kidney function assessments.

Stage 3: This stage describes individuals with subclinical CVD with metabolic risk factors or kidney disease or those at high predicted risk for CVD. The goal is to intensify efforts to prevent progression to symptomatic CVD and kidney failure. This may involve increasing or changing medications, and additional focus on lifestyle changes. Coronary artery calcium (CAC) measurement in some adults is recommended to assess narrowing of the arteries when treatment decisions are unclear.

Stage 4: Individuals with stage 4 CKM syndrome have symptomatic CVD, excess body fat, metabolic risk factors, or kidney disease. Stage 4 CKM syndrome is divided into two subcategories: (4a) no kidney failure and (4b) kidney failure. In this stage, patients may have already had a myocardial infarction (MI) or stroke or may already have heart failure. They also may have additional CV conditions such as peripheral artery disease or atrial fibrillation. The goal of care is individualized treatment for CVD with consideration for CKM syndrome conditions.

The advisory also describes CKM syndrome regression, “an important concept and public health message in which people making healthy lifestyle changes and achieving weight loss may regress to lower CKM syndrome stages and a better state of health,” the AHA says in a news release.

They note that a “critical” next step is to update the pooled cohort equation (PCE) risk prediction algorithm to include measures of kidney function, type 2 diabetes control, and social determinants of health for a more comprehensive risk estimate.

The advisory also recommends risk calculator updates be expanded to assess risk in people as young as age 30 and to calculate both 10- and 30-year CVD risk.

“Clearly defining the patient with CKM syndrome, and providing new approaches for CKM syndrome staging and risk prediction, will help health care professionals to identify these individuals earlier and to provide timely, holistic, and patient-centered care,” Dr. Ndumele said.

This presidential advisory was prepared by the volunteer writing group on behalf of the AHA . The authors have reported no relevant financial relationships.

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

TOPLINE:

Use of a novel clinical-decision support tool and shared decision-making in elderly patients with type 2 diabetes managed in a primary care practice and at high risk for hypoglycemic episodes led to a 46% decrease in the number of at-risk patients and discontinuation of hypoglycemic agents in 20% in a prospective, 6-month, single-arm study with 94 patients.

METHODOLOGY:

• The HypoPrevent study enrolled 94 people from a Pennsylvania primary care practice who were at least 65 years old with type 2 diabetes and at risk for hypoglycemia because of treatment with insulin or sulfonylureas, and having a hemoglobin A1c of less than 7.0%.
• Clinicians and patients used a newly devised hypoglycemia reduction clinical-decision support tool developed by the Endocrine Society and a health care consulting company to help guide shared decision-making for a goal A1c level, potential changes to treatment, and other steps to reduce the risk of hypoglycemia.
• Primary outcomes during 6-month follow-up were impact of the intervention on A1c, changes in use of insulin or sulfonylureas, change in the number of study patients at risk for hypoglycemia, and impact on the incidence of nonsevere hypoglycemic events (NSHEs) measured with the Treatment-Related Impact Measure–Non-severe Hypoglycemic Events (TRIM-HYPO) survey.

TAKEAWAY:

• Patients averaged 74 years old, 57% were women, 95% were White, 61% had diabetes for more than 10 years, 48% had chronic kidney disease, 51% were on insulin, 47% on a sulfonylurea, and 80 of the 94 enrolled patients completed all three study visits.
• Nineteen patients (20%) reduced their dose of or discontinued insulin or sulfonylurea.
• In patients with both baseline and follow-up A1c measures, A1c rose from 6.29% at baseline to 6.82%.
• Fifty patients set an A1c goal and had a timely follow-up A1c measurement, and in this subgroup the number of patients at risk for hypoglycemia decreased by 46%, a significant change.
• Patients who reported at least one NSHE at baseline had a significant reduction between the baseline survey and follow-up visits in both the total score as well as each of the five scored domains.

IN PRACTICE:

The HypoPrevent study results “show the potential of a decision support tool and shared decision making to reduce the risk of hypoglycemia in older persons with type 2 diabetes,” and that “the tested decision tool can be effectively used by a busy primary care practice with positive results,” concluded the researchers in their report.

SOURCE:

The HypoPrevent study was funded and organized by the Endocrine Society in collaboration with a multicenter team of researchers. The report appeared in the Journal of the American Geriatrics Society.

LIMITATIONS:

Lack of a control group makes it impossible to conclusively determine whether the intervention led to the observed increases in A1c levels, nor can the study exclude regression to the mean as the cause for lowered A1c levels.

DISCLOSURES:

The study received funding from Abbott, Lilly, Merck, Novo Nordisk, and Sanofi. Two coauthors had individual disclosures listed in the report; the other six coauthors had no disclosures.

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

TOPLINE:

Use of a novel clinical-decision support tool and shared decision-making in elderly patients with type 2 diabetes managed in a primary care practice and at high risk for hypoglycemic episodes led to a 46% decrease in the number of at-risk patients and discontinuation of hypoglycemic agents in 20% in a prospective, 6-month, single-arm study with 94 patients.

METHODOLOGY:

• The HypoPrevent study enrolled 94 people from a Pennsylvania primary care practice who were at least 65 years old with type 2 diabetes and at risk for hypoglycemia because of treatment with insulin or sulfonylureas, and having a hemoglobin A1c of less than 7.0%.
• Clinicians and patients used a newly devised hypoglycemia reduction clinical-decision support tool developed by the Endocrine Society and a health care consulting company to help guide shared decision-making for a goal A1c level, potential changes to treatment, and other steps to reduce the risk of hypoglycemia.
• Primary outcomes during 6-month follow-up were impact of the intervention on A1c, changes in use of insulin or sulfonylureas, change in the number of study patients at risk for hypoglycemia, and impact on the incidence of nonsevere hypoglycemic events (NSHEs) measured with the Treatment-Related Impact Measure–Non-severe Hypoglycemic Events (TRIM-HYPO) survey.

TAKEAWAY:

• Patients averaged 74 years old, 57% were women, 95% were White, 61% had diabetes for more than 10 years, 48% had chronic kidney disease, 51% were on insulin, 47% on a sulfonylurea, and 80 of the 94 enrolled patients completed all three study visits.
• Nineteen patients (20%) reduced their dose of or discontinued insulin or sulfonylurea.
• In patients with both baseline and follow-up A1c measures, A1c rose from 6.29% at baseline to 6.82%.
• Fifty patients set an A1c goal and had a timely follow-up A1c measurement, and in this subgroup the number of patients at risk for hypoglycemia decreased by 46%, a significant change.
• Patients who reported at least one NSHE at baseline had a significant reduction between the baseline survey and follow-up visits in both the total score as well as each of the five scored domains.

IN PRACTICE:

The HypoPrevent study results “show the potential of a decision support tool and shared decision making to reduce the risk of hypoglycemia in older persons with type 2 diabetes,” and that “the tested decision tool can be effectively used by a busy primary care practice with positive results,” concluded the researchers in their report.

SOURCE:

The HypoPrevent study was funded and organized by the Endocrine Society in collaboration with a multicenter team of researchers. The report appeared in the Journal of the American Geriatrics Society.

LIMITATIONS:

Lack of a control group makes it impossible to conclusively determine whether the intervention led to the observed increases in A1c levels, nor can the study exclude regression to the mean as the cause for lowered A1c levels.

DISCLOSURES:

The study received funding from Abbott, Lilly, Merck, Novo Nordisk, and Sanofi. Two coauthors had individual disclosures listed in the report; the other six coauthors had no disclosures.

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

TOPLINE:

Use of a novel clinical-decision support tool and shared decision-making in elderly patients with type 2 diabetes managed in a primary care practice and at high risk for hypoglycemic episodes led to a 46% decrease in the number of at-risk patients and discontinuation of hypoglycemic agents in 20% in a prospective, 6-month, single-arm study with 94 patients.

METHODOLOGY:

• The HypoPrevent study enrolled 94 people from a Pennsylvania primary care practice who were at least 65 years old with type 2 diabetes and at risk for hypoglycemia because of treatment with insulin or sulfonylureas, and having a hemoglobin A1c of less than 7.0%.
• Clinicians and patients used a newly devised hypoglycemia reduction clinical-decision support tool developed by the Endocrine Society and a health care consulting company to help guide shared decision-making for a goal A1c level, potential changes to treatment, and other steps to reduce the risk of hypoglycemia.
• Primary outcomes during 6-month follow-up were impact of the intervention on A1c, changes in use of insulin or sulfonylureas, change in the number of study patients at risk for hypoglycemia, and impact on the incidence of nonsevere hypoglycemic events (NSHEs) measured with the Treatment-Related Impact Measure–Non-severe Hypoglycemic Events (TRIM-HYPO) survey.

TAKEAWAY:

• Patients averaged 74 years old, 57% were women, 95% were White, 61% had diabetes for more than 10 years, 48% had chronic kidney disease, 51% were on insulin, 47% on a sulfonylurea, and 80 of the 94 enrolled patients completed all three study visits.
• Nineteen patients (20%) reduced their dose of or discontinued insulin or sulfonylurea.
• In patients with both baseline and follow-up A1c measures, A1c rose from 6.29% at baseline to 6.82%.
• Fifty patients set an A1c goal and had a timely follow-up A1c measurement, and in this subgroup the number of patients at risk for hypoglycemia decreased by 46%, a significant change.
• Patients who reported at least one NSHE at baseline had a significant reduction between the baseline survey and follow-up visits in both the total score as well as each of the five scored domains.

IN PRACTICE:

The HypoPrevent study results “show the potential of a decision support tool and shared decision making to reduce the risk of hypoglycemia in older persons with type 2 diabetes,” and that “the tested decision tool can be effectively used by a busy primary care practice with positive results,” concluded the researchers in their report.

SOURCE:

The HypoPrevent study was funded and organized by the Endocrine Society in collaboration with a multicenter team of researchers. The report appeared in the Journal of the American Geriatrics Society.

LIMITATIONS:

Lack of a control group makes it impossible to conclusively determine whether the intervention led to the observed increases in A1c levels, nor can the study exclude regression to the mean as the cause for lowered A1c levels.

DISCLOSURES:

The study received funding from Abbott, Lilly, Merck, Novo Nordisk, and Sanofi. Two coauthors had individual disclosures listed in the report; the other six coauthors had no disclosures.

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

For most symptomatic patients with atherosclerotic occlusion of the internal carotid artery (ICA) or middle cerebral artery (MCA), adding extracranial-intracranial (EC-IC) bypass surgery to medical therapy did not reduce stroke or death in comparison with medical therapy alone in the latest randomized trial comparing the two interventions.

However, subgroup analyses suggest a potential benefit of surgery for certain patients, such as those with MCA vs. ICA occlusion, mean transit time greater than 6 seconds, or regional blood flow of 0.8 or less.

“We were disappointed by the results,” Liqun Jiao, MD, of the National Center for Neurological Disorders in Beijing, told this news organization. “We were expecting to demonstrate a benefit from EC-IC bypass surgery over medical treatment alone in symptomatic patients with ICA or MCA occlusion and hemodynamic insufficiency, per our original hypothesis.”

Although the study showed improved efficacy and safety for the surgical procedure, he said, “The progress of medical treatment is even better.”

The study was published online in JAMA.
 

Subgroup analyses promising

Previous randomized clinical trials, including the EC/IC Bypass Study and the Carotid Occlusion Surgery Study (COSS), showed no benefit in stroke prevention for patients with atherosclerotic occlusion of the ICA or MCA.

However, in light of improvements over the years in surgical techniques and patient selection, the authors conducted the Carotid and Middle Cerebral Artery Occlusion Surgery Study (CMOSS), a multicenter, randomized, open-label trial comparing EC-IC bypass surgery plus medical therapy, consisting of antiplatelet therapy and control of stroke risk factors, with medical therapy alone in symptomatic patients with ICA or MCA occlusion and hemodynamic insufficiency, with refined patient and operator selection.

A total of 324 patients (median age, 52.7 years; 79% men) in 13 centers in China were included; 309 patients (95%) completed the study.

The primary outcome was a composite of stroke or death within 30 days or ipsilateral ischemic stroke beyond 30 days through 2 years after randomization.

Secondary outcomes included, among others, any stroke or death within 2 years and fatal stroke within 2 years.

No significant difference was found for the primary outcome between the surgical group (8.6%) and the medical group (12.3%).

The 30-day risk of stroke or death was 6.2% in the surgery group, versus 1.8% (3/163) for the medical group. The risk of ipsilateral ischemic stroke beyond 30 days through 2 years was 2%, versus 10.3% – nonsignificant differences.

Furthermore, none of the prespecified secondary endpoints showed a significant difference, including any stroke or death within 2 years (9.9% vs. 15.3%; hazard ratio, 0.69) and fatal stroke within 2 years (2% vs. none).

Despite the findings, “We are encouraged by the subgroup analysis and the trend of long-term outcomes,” Dr. Jiao said. “We will continue to finish 5-10 years of follow-up to see whether the benefit of bypass surgery can be identified.”

The team has also launched the CMOSS-2 trial with a refined study design based on the results of subgroup analysis of the CMOSS study.

CMOSS-2 is recruiting patients with symptomatic chronic occlusion of the MCA and severe hemodynamic insufficiency in 13 sites in China. The primary outcome is ischemic stroke in the territory of the target artery within 24 months after randomization.
 

Can’t exclude benefit

Thomas Jeerakathil, MD, a professor at the University of Alberta and Northern Stroke Lead, Cardiovascular and Stroke Strategic Clinical Network, Alberta Health Services, Edmonton, commented on the study for this news organization. Like the authors, he said, “I don’t consider this study to definitively exclude the benefit of EC/IC bypass. More studies are required.”

Dr. Jeerakathil would like to see a study of a higher-risk group based on both clinical and hemodynamic blood flow criteria. In the current study, he said, “The trial group overall may not have been at high enough stroke risk to justify the up-front risks of the EC-IC bypass procedure.”

In addition, “The analysis method of Cox proportional hazards regression for the primary outcome did not fit the data when the perioperative period was combined with the period beyond 30 days,” he noted. “The researchers were open about this and did pivot and included a post hoc relative risk-based analysis, but the validity of their primary analysis is questionable.”

Furthermore, the study was “somewhat underpowered with a relatively small sample size and had the potential to miss clinically significant differences between groups,” he said. “It would be good to see a longer follow-up period of at least 5 years added to this trial and used in future trials, rather than 2 years.”

“Lastly,” he said, “it’s difficult to ignore the reduction in recurrent stroke events over the 30-day to 2-year time period associated with EC-IC bypass (from 10.3% down to 2%). This reduction alone shows the procedure has some potential to prevent stroke and would argue for more trials.”

EC-IC could be considered for patients who have failed other medical therapies and have more substantial evidence of compromised blood flow to the brain than those in the CMOSS trial, he noted, as many of these patients have few other options. “In our center and many other centers, the approach to EC-IC bypass is probably much more selective than used in the trial.”

Dr. Jeerakathil concluded, “Clinicians should be cautious about offering the procedure to patients with just mildly delayed blood flow in the hemisphere affected by the occluded artery and those who have not yet failed maximal medical therapy.”

But Seemant Chaturvedi, MD, and J. Marc Simard, MD, PhD, both of the University of Maryland, Baltimore, are not as optimistic about the potential for EC-IC.

Writing in a related editorial, they conclude that the results with EC-IC bypass surgery in randomized trials “remain unimpressive. Until a better understanding of the unique hemodynamic features of the brain is achieved, it will be difficult for neurosurgeons to continue offering this procedure to patients with ICA or MCA occlusion. Intensive, multifaceted medical therapy remains the first-line treatment for [these] patients.”

The study was supported by a research grant from the National Health Commission of the People’s Republic of China. Dr. Jiao, Dr. Jeerakathil, Dr. Chaturvedi, and Dr. Simard reported no conflicts of interest.

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

For most symptomatic patients with atherosclerotic occlusion of the internal carotid artery (ICA) or middle cerebral artery (MCA), adding extracranial-intracranial (EC-IC) bypass surgery to medical therapy did not reduce stroke or death in comparison with medical therapy alone in the latest randomized trial comparing the two interventions.

However, subgroup analyses suggest a potential benefit of surgery for certain patients, such as those with MCA vs. ICA occlusion, mean transit time greater than 6 seconds, or regional blood flow of 0.8 or less.

“We were disappointed by the results,” Liqun Jiao, MD, of the National Center for Neurological Disorders in Beijing, told this news organization. “We were expecting to demonstrate a benefit from EC-IC bypass surgery over medical treatment alone in symptomatic patients with ICA or MCA occlusion and hemodynamic insufficiency, per our original hypothesis.”

Although the study showed improved efficacy and safety for the surgical procedure, he said, “The progress of medical treatment is even better.”

The study was published online in JAMA.
 

Subgroup analyses promising

Previous randomized clinical trials, including the EC/IC Bypass Study and the Carotid Occlusion Surgery Study (COSS), showed no benefit in stroke prevention for patients with atherosclerotic occlusion of the ICA or MCA.

However, in light of improvements over the years in surgical techniques and patient selection, the authors conducted the Carotid and Middle Cerebral Artery Occlusion Surgery Study (CMOSS), a multicenter, randomized, open-label trial comparing EC-IC bypass surgery plus medical therapy, consisting of antiplatelet therapy and control of stroke risk factors, with medical therapy alone in symptomatic patients with ICA or MCA occlusion and hemodynamic insufficiency, with refined patient and operator selection.

A total of 324 patients (median age, 52.7 years; 79% men) in 13 centers in China were included; 309 patients (95%) completed the study.

The primary outcome was a composite of stroke or death within 30 days or ipsilateral ischemic stroke beyond 30 days through 2 years after randomization.

Secondary outcomes included, among others, any stroke or death within 2 years and fatal stroke within 2 years.

No significant difference was found for the primary outcome between the surgical group (8.6%) and the medical group (12.3%).

The 30-day risk of stroke or death was 6.2% in the surgery group, versus 1.8% (3/163) for the medical group. The risk of ipsilateral ischemic stroke beyond 30 days through 2 years was 2%, versus 10.3% – nonsignificant differences.

Furthermore, none of the prespecified secondary endpoints showed a significant difference, including any stroke or death within 2 years (9.9% vs. 15.3%; hazard ratio, 0.69) and fatal stroke within 2 years (2% vs. none).

Despite the findings, “We are encouraged by the subgroup analysis and the trend of long-term outcomes,” Dr. Jiao said. “We will continue to finish 5-10 years of follow-up to see whether the benefit of bypass surgery can be identified.”

The team has also launched the CMOSS-2 trial with a refined study design based on the results of subgroup analysis of the CMOSS study.

CMOSS-2 is recruiting patients with symptomatic chronic occlusion of the MCA and severe hemodynamic insufficiency in 13 sites in China. The primary outcome is ischemic stroke in the territory of the target artery within 24 months after randomization.
 

Can’t exclude benefit

Thomas Jeerakathil, MD, a professor at the University of Alberta and Northern Stroke Lead, Cardiovascular and Stroke Strategic Clinical Network, Alberta Health Services, Edmonton, commented on the study for this news organization. Like the authors, he said, “I don’t consider this study to definitively exclude the benefit of EC/IC bypass. More studies are required.”

Dr. Jeerakathil would like to see a study of a higher-risk group based on both clinical and hemodynamic blood flow criteria. In the current study, he said, “The trial group overall may not have been at high enough stroke risk to justify the up-front risks of the EC-IC bypass procedure.”

In addition, “The analysis method of Cox proportional hazards regression for the primary outcome did not fit the data when the perioperative period was combined with the period beyond 30 days,” he noted. “The researchers were open about this and did pivot and included a post hoc relative risk-based analysis, but the validity of their primary analysis is questionable.”

Furthermore, the study was “somewhat underpowered with a relatively small sample size and had the potential to miss clinically significant differences between groups,” he said. “It would be good to see a longer follow-up period of at least 5 years added to this trial and used in future trials, rather than 2 years.”

“Lastly,” he said, “it’s difficult to ignore the reduction in recurrent stroke events over the 30-day to 2-year time period associated with EC-IC bypass (from 10.3% down to 2%). This reduction alone shows the procedure has some potential to prevent stroke and would argue for more trials.”

EC-IC could be considered for patients who have failed other medical therapies and have more substantial evidence of compromised blood flow to the brain than those in the CMOSS trial, he noted, as many of these patients have few other options. “In our center and many other centers, the approach to EC-IC bypass is probably much more selective than used in the trial.”

Dr. Jeerakathil concluded, “Clinicians should be cautious about offering the procedure to patients with just mildly delayed blood flow in the hemisphere affected by the occluded artery and those who have not yet failed maximal medical therapy.”

But Seemant Chaturvedi, MD, and J. Marc Simard, MD, PhD, both of the University of Maryland, Baltimore, are not as optimistic about the potential for EC-IC.

Writing in a related editorial, they conclude that the results with EC-IC bypass surgery in randomized trials “remain unimpressive. Until a better understanding of the unique hemodynamic features of the brain is achieved, it will be difficult for neurosurgeons to continue offering this procedure to patients with ICA or MCA occlusion. Intensive, multifaceted medical therapy remains the first-line treatment for [these] patients.”

The study was supported by a research grant from the National Health Commission of the People’s Republic of China. Dr. Jiao, Dr. Jeerakathil, Dr. Chaturvedi, and Dr. Simard reported no conflicts of interest.

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

For most symptomatic patients with atherosclerotic occlusion of the internal carotid artery (ICA) or middle cerebral artery (MCA), adding extracranial-intracranial (EC-IC) bypass surgery to medical therapy did not reduce stroke or death in comparison with medical therapy alone in the latest randomized trial comparing the two interventions.

However, subgroup analyses suggest a potential benefit of surgery for certain patients, such as those with MCA vs. ICA occlusion, mean transit time greater than 6 seconds, or regional blood flow of 0.8 or less.

“We were disappointed by the results,” Liqun Jiao, MD, of the National Center for Neurological Disorders in Beijing, told this news organization. “We were expecting to demonstrate a benefit from EC-IC bypass surgery over medical treatment alone in symptomatic patients with ICA or MCA occlusion and hemodynamic insufficiency, per our original hypothesis.”

Although the study showed improved efficacy and safety for the surgical procedure, he said, “The progress of medical treatment is even better.”

The study was published online in JAMA.
 

Subgroup analyses promising

Previous randomized clinical trials, including the EC/IC Bypass Study and the Carotid Occlusion Surgery Study (COSS), showed no benefit in stroke prevention for patients with atherosclerotic occlusion of the ICA or MCA.

However, in light of improvements over the years in surgical techniques and patient selection, the authors conducted the Carotid and Middle Cerebral Artery Occlusion Surgery Study (CMOSS), a multicenter, randomized, open-label trial comparing EC-IC bypass surgery plus medical therapy, consisting of antiplatelet therapy and control of stroke risk factors, with medical therapy alone in symptomatic patients with ICA or MCA occlusion and hemodynamic insufficiency, with refined patient and operator selection.

A total of 324 patients (median age, 52.7 years; 79% men) in 13 centers in China were included; 309 patients (95%) completed the study.

The primary outcome was a composite of stroke or death within 30 days or ipsilateral ischemic stroke beyond 30 days through 2 years after randomization.

Secondary outcomes included, among others, any stroke or death within 2 years and fatal stroke within 2 years.

No significant difference was found for the primary outcome between the surgical group (8.6%) and the medical group (12.3%).

The 30-day risk of stroke or death was 6.2% in the surgery group, versus 1.8% (3/163) for the medical group. The risk of ipsilateral ischemic stroke beyond 30 days through 2 years was 2%, versus 10.3% – nonsignificant differences.

Furthermore, none of the prespecified secondary endpoints showed a significant difference, including any stroke or death within 2 years (9.9% vs. 15.3%; hazard ratio, 0.69) and fatal stroke within 2 years (2% vs. none).

Despite the findings, “We are encouraged by the subgroup analysis and the trend of long-term outcomes,” Dr. Jiao said. “We will continue to finish 5-10 years of follow-up to see whether the benefit of bypass surgery can be identified.”

The team has also launched the CMOSS-2 trial with a refined study design based on the results of subgroup analysis of the CMOSS study.

CMOSS-2 is recruiting patients with symptomatic chronic occlusion of the MCA and severe hemodynamic insufficiency in 13 sites in China. The primary outcome is ischemic stroke in the territory of the target artery within 24 months after randomization.
 

Can’t exclude benefit

Thomas Jeerakathil, MD, a professor at the University of Alberta and Northern Stroke Lead, Cardiovascular and Stroke Strategic Clinical Network, Alberta Health Services, Edmonton, commented on the study for this news organization. Like the authors, he said, “I don’t consider this study to definitively exclude the benefit of EC/IC bypass. More studies are required.”

Dr. Jeerakathil would like to see a study of a higher-risk group based on both clinical and hemodynamic blood flow criteria. In the current study, he said, “The trial group overall may not have been at high enough stroke risk to justify the up-front risks of the EC-IC bypass procedure.”

In addition, “The analysis method of Cox proportional hazards regression for the primary outcome did not fit the data when the perioperative period was combined with the period beyond 30 days,” he noted. “The researchers were open about this and did pivot and included a post hoc relative risk-based analysis, but the validity of their primary analysis is questionable.”

Furthermore, the study was “somewhat underpowered with a relatively small sample size and had the potential to miss clinically significant differences between groups,” he said. “It would be good to see a longer follow-up period of at least 5 years added to this trial and used in future trials, rather than 2 years.”

“Lastly,” he said, “it’s difficult to ignore the reduction in recurrent stroke events over the 30-day to 2-year time period associated with EC-IC bypass (from 10.3% down to 2%). This reduction alone shows the procedure has some potential to prevent stroke and would argue for more trials.”

EC-IC could be considered for patients who have failed other medical therapies and have more substantial evidence of compromised blood flow to the brain than those in the CMOSS trial, he noted, as many of these patients have few other options. “In our center and many other centers, the approach to EC-IC bypass is probably much more selective than used in the trial.”

Dr. Jeerakathil concluded, “Clinicians should be cautious about offering the procedure to patients with just mildly delayed blood flow in the hemisphere affected by the occluded artery and those who have not yet failed maximal medical therapy.”

But Seemant Chaturvedi, MD, and J. Marc Simard, MD, PhD, both of the University of Maryland, Baltimore, are not as optimistic about the potential for EC-IC.

Writing in a related editorial, they conclude that the results with EC-IC bypass surgery in randomized trials “remain unimpressive. Until a better understanding of the unique hemodynamic features of the brain is achieved, it will be difficult for neurosurgeons to continue offering this procedure to patients with ICA or MCA occlusion. Intensive, multifaceted medical therapy remains the first-line treatment for [these] patients.”

The study was supported by a research grant from the National Health Commission of the People’s Republic of China. Dr. Jiao, Dr. Jeerakathil, Dr. Chaturvedi, and Dr. Simard reported no conflicts of interest.

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

Traumatic brain injury (TBI) that occurs in early adulthood is associated with cognitive decline in later life, results from a study of identical twins who served in World War II show.

The research, which included almost 9,000 individuals, showed that twins who had experienced a TBI were more likely to have lower cognitive function at age 70 versus their twin who did not experience a TBI, especially if they had lost consciousness or were older than age 24 at the time of injury. In addition, their cognitive decline occurred at a more rapid rate.

“We know that TBI increases the risk of developing Alzheimer’s disease and other dementias in later life, but we haven’t known about TBI’s effect on cognitive decline that does not quite meet the threshold for dementia,” study investigator Marianne Chanti-Ketterl, PhD, Duke University, Durham, N.C., said in an interview.

“We know that TBI increases the risk of dementia in later life, but we haven’t known if TBI affects cognitive function, causes cognitive decline that has not progressed to the point of severity with Alzheimer’s or dementia,” she added.

Being able to study the impact of TBI in monozygotic twins gives this study a unique strength, she noted.

“The important thing about this is that they are monozygotic twins, and we know they shared a lot of early life exposure, and almost 100% genetics,” Dr. Chanti-Ketterl said.

The study was published online in Neurology.

For the study, the investigators assessed 8,662 participants born between 1917 and 1927 who were part of the National Academy of Sciences National Research Council’s Twin Registry. The registry is composed of male veterans of World War II with a history of TBI, as reported by themselves or a caregiver.

The men were followed up for many years as part of the registry, but cognitive assessment only began in the 1990s. They were followed up at four different time points, at which time the Telephone Interview for Cognitive Status (TICS-m), an alternative to the Mini-Mental State Examination that must be given in person, was administered.

A total of 25% of participants had experienced concussion in their lifetime. Of this cohort, there were 589 pairs of monozygotic twins who were discordant (one twin had TBI and the other had not).

Among the monozygotic twin cohort, a history of any TBI and being older than age 24 at the time of TBI were associated with lower TICS-m scores.

A twin who experienced TBI after age 24 scored 0.59 points lower on the TICS-m at age 70 than his twin with no TBI, and cognitive function declined faster, by 0.05 points per year.
 

First study of its kind

Holly Elser, MD, PhD, MPH, an epidemiologist and resident physician in neurology at the University of Pennsylvania, Philadelphia, and coauthor of an accompanying editorial, said in an interview that the study’s twin design was a definite strength.

“There are lots of papers that have remarked on the apparent association between head injury and subsequent dementia or cognitive decline, but to my knowledge, this is one of the first, if not the first, to use a twin study design, which has the unique advantage of having better control over early life and genetic factors than would ever typically be possible in a dataset of unrelated adults,” said Dr. Elser.

She added that the study findings “strengthen our understanding of the relationship between TBI and later cognitive decline, so I think there is an etiologic value to the study.”

However, Dr. Elser noted that the composition of the study population may limit the extent to which the results apply to contemporary populations.

“This was a population of White male twins born between 1917 and 1927,” she noted. “However, does the experience of people who were in the military generalize to civilian populations? Are twins representative of the general population or are they unique in terms of their risk factors?”

It is always important to emphasize inclusivity in clinical research, and in dementia research in particular, Dr. Elser added.

“There are many examples of instances where racialized and otherwise economically marginalized groups have been excluded from analysis, which is problematic because there are already economically and socially marginalized groups who disproportionately bear the brunt of dementia.

“This is not a criticism of the authors’ work, that their data didn’t include a more diverse patient base, but I think it is an important reminder that we should always interpret study findings within the limitations of the data. It’s a reminder to be thoughtful about taking explicit steps to include more diverse groups in future research,” she said.

The study was funded by the National Institute on Aging/National Institutes of Health and the Department of Defense. Dr. Chanti-Ketterl and Dr. Elser have reported no relevant financial relationships.

A version of this article appeared on Medscape.com.

Traumatic brain injury (TBI) that occurs in early adulthood is associated with cognitive decline in later life, results from a study of identical twins who served in World War II show.

The research, which included almost 9,000 individuals, showed that twins who had experienced a TBI were more likely to have lower cognitive function at age 70 versus their twin who did not experience a TBI, especially if they had lost consciousness or were older than age 24 at the time of injury. In addition, their cognitive decline occurred at a more rapid rate.

“We know that TBI increases the risk of developing Alzheimer’s disease and other dementias in later life, but we haven’t known about TBI’s effect on cognitive decline that does not quite meet the threshold for dementia,” study investigator Marianne Chanti-Ketterl, PhD, Duke University, Durham, N.C., said in an interview.

“We know that TBI increases the risk of dementia in later life, but we haven’t known if TBI affects cognitive function, causes cognitive decline that has not progressed to the point of severity with Alzheimer’s or dementia,” she added.

Being able to study the impact of TBI in monozygotic twins gives this study a unique strength, she noted.

“The important thing about this is that they are monozygotic twins, and we know they shared a lot of early life exposure, and almost 100% genetics,” Dr. Chanti-Ketterl said.

The study was published online in Neurology.

For the study, the investigators assessed 8,662 participants born between 1917 and 1927 who were part of the National Academy of Sciences National Research Council’s Twin Registry. The registry is composed of male veterans of World War II with a history of TBI, as reported by themselves or a caregiver.

The men were followed up for many years as part of the registry, but cognitive assessment only began in the 1990s. They were followed up at four different time points, at which time the Telephone Interview for Cognitive Status (TICS-m), an alternative to the Mini-Mental State Examination that must be given in person, was administered.

A total of 25% of participants had experienced concussion in their lifetime. Of this cohort, there were 589 pairs of monozygotic twins who were discordant (one twin had TBI and the other had not).

Among the monozygotic twin cohort, a history of any TBI and being older than age 24 at the time of TBI were associated with lower TICS-m scores.

A twin who experienced TBI after age 24 scored 0.59 points lower on the TICS-m at age 70 than his twin with no TBI, and cognitive function declined faster, by 0.05 points per year.
 

First study of its kind

Holly Elser, MD, PhD, MPH, an epidemiologist and resident physician in neurology at the University of Pennsylvania, Philadelphia, and coauthor of an accompanying editorial, said in an interview that the study’s twin design was a definite strength.

“There are lots of papers that have remarked on the apparent association between head injury and subsequent dementia or cognitive decline, but to my knowledge, this is one of the first, if not the first, to use a twin study design, which has the unique advantage of having better control over early life and genetic factors than would ever typically be possible in a dataset of unrelated adults,” said Dr. Elser.

She added that the study findings “strengthen our understanding of the relationship between TBI and later cognitive decline, so I think there is an etiologic value to the study.”

However, Dr. Elser noted that the composition of the study population may limit the extent to which the results apply to contemporary populations.

“This was a population of White male twins born between 1917 and 1927,” she noted. “However, does the experience of people who were in the military generalize to civilian populations? Are twins representative of the general population or are they unique in terms of their risk factors?”

It is always important to emphasize inclusivity in clinical research, and in dementia research in particular, Dr. Elser added.

“There are many examples of instances where racialized and otherwise economically marginalized groups have been excluded from analysis, which is problematic because there are already economically and socially marginalized groups who disproportionately bear the brunt of dementia.

“This is not a criticism of the authors’ work, that their data didn’t include a more diverse patient base, but I think it is an important reminder that we should always interpret study findings within the limitations of the data. It’s a reminder to be thoughtful about taking explicit steps to include more diverse groups in future research,” she said.

The study was funded by the National Institute on Aging/National Institutes of Health and the Department of Defense. Dr. Chanti-Ketterl and Dr. Elser have reported no relevant financial relationships.

A version of this article appeared on Medscape.com.

Traumatic brain injury (TBI) that occurs in early adulthood is associated with cognitive decline in later life, results from a study of identical twins who served in World War II show.

The research, which included almost 9,000 individuals, showed that twins who had experienced a TBI were more likely to have lower cognitive function at age 70 versus their twin who did not experience a TBI, especially if they had lost consciousness or were older than age 24 at the time of injury. In addition, their cognitive decline occurred at a more rapid rate.

“We know that TBI increases the risk of developing Alzheimer’s disease and other dementias in later life, but we haven’t known about TBI’s effect on cognitive decline that does not quite meet the threshold for dementia,” study investigator Marianne Chanti-Ketterl, PhD, Duke University, Durham, N.C., said in an interview.

“We know that TBI increases the risk of dementia in later life, but we haven’t known if TBI affects cognitive function, causes cognitive decline that has not progressed to the point of severity with Alzheimer’s or dementia,” she added.

Being able to study the impact of TBI in monozygotic twins gives this study a unique strength, she noted.

“The important thing about this is that they are monozygotic twins, and we know they shared a lot of early life exposure, and almost 100% genetics,” Dr. Chanti-Ketterl said.

The study was published online in Neurology.

For the study, the investigators assessed 8,662 participants born between 1917 and 1927 who were part of the National Academy of Sciences National Research Council’s Twin Registry. The registry is composed of male veterans of World War II with a history of TBI, as reported by themselves or a caregiver.

The men were followed up for many years as part of the registry, but cognitive assessment only began in the 1990s. They were followed up at four different time points, at which time the Telephone Interview for Cognitive Status (TICS-m), an alternative to the Mini-Mental State Examination that must be given in person, was administered.

A total of 25% of participants had experienced concussion in their lifetime. Of this cohort, there were 589 pairs of monozygotic twins who were discordant (one twin had TBI and the other had not).

Among the monozygotic twin cohort, a history of any TBI and being older than age 24 at the time of TBI were associated with lower TICS-m scores.

A twin who experienced TBI after age 24 scored 0.59 points lower on the TICS-m at age 70 than his twin with no TBI, and cognitive function declined faster, by 0.05 points per year.
 

First study of its kind

Holly Elser, MD, PhD, MPH, an epidemiologist and resident physician in neurology at the University of Pennsylvania, Philadelphia, and coauthor of an accompanying editorial, said in an interview that the study’s twin design was a definite strength.

“There are lots of papers that have remarked on the apparent association between head injury and subsequent dementia or cognitive decline, but to my knowledge, this is one of the first, if not the first, to use a twin study design, which has the unique advantage of having better control over early life and genetic factors than would ever typically be possible in a dataset of unrelated adults,” said Dr. Elser.

She added that the study findings “strengthen our understanding of the relationship between TBI and later cognitive decline, so I think there is an etiologic value to the study.”

However, Dr. Elser noted that the composition of the study population may limit the extent to which the results apply to contemporary populations.

“This was a population of White male twins born between 1917 and 1927,” she noted. “However, does the experience of people who were in the military generalize to civilian populations? Are twins representative of the general population or are they unique in terms of their risk factors?”

It is always important to emphasize inclusivity in clinical research, and in dementia research in particular, Dr. Elser added.

“There are many examples of instances where racialized and otherwise economically marginalized groups have been excluded from analysis, which is problematic because there are already economically and socially marginalized groups who disproportionately bear the brunt of dementia.

“This is not a criticism of the authors’ work, that their data didn’t include a more diverse patient base, but I think it is an important reminder that we should always interpret study findings within the limitations of the data. It’s a reminder to be thoughtful about taking explicit steps to include more diverse groups in future research,” she said.

The study was funded by the National Institute on Aging/National Institutes of Health and the Department of Defense. Dr. Chanti-Ketterl and Dr. Elser have reported no relevant financial relationships.

A version of this article appeared on Medscape.com.

TOPLINE:

In insulin-naive people with type 2 diabetes, once-weekly icodec titrated with a dosing guide app was both noninferior and superior to daily basal analogs in reducing A1c levels, with improved treatment satisfaction and compliance scores and similarly low hypoglycemia rates.

METHODOLOGY:

• A 52-week, randomized, open-label, parallel-group, phase 3a trial with real-world elements was conducted at 176 sites in seven countries.
• A total of 1,085 insulin-naive patients with type 2 diabetes were randomly assigned to receive icodec with a dosing guide app or daily analogs (U100 glargine, U300 glargine, or icodec).

TAKEAWAY:

• A1c levels dropped from 8.96% at baseline to 7.24% at week 52 with icodec and from 8.88% to 7.61% with the daily analog, a treatment difference of 0.37 percentage point (P < .001 for noninferiority and P = .009 for superiority in favor of icodec plus the app).
• Patient-reported outcomes were more favorable with icodec plus the app vs. daily analogs, with estimated treatment differences that were significant for the Treatment Related Impact Measure for Diabetes (3.04) but not the Diabetes Treatment Satisfaction Questionnaire (0.78).
• Observed rates of combined clinically significant or severe hypoglycemia were low (0.19 event per patient-year of exposure for icodec plus the app vs. 0.14 for daily analogs; estimated rate ratio, 1.17).

IN PRACTICE:

“Once-weekly icodec with a dosing guide app could conceivably address several challenges seen in everyday practice, including inadequate dose titration and nonadherence to prescribed treatment regimens.”

SOURCE:

The study was conducted by Harpreet S. Bajaj, MD, MPH, of LMC Diabetes and Endocrinology, Brampton, Ontario, and colleagues. It was published online in Annals of Internal Medicine.

LIMITATIONS:

The research could not differentiate between the effects of icodec and those of the dosing guide app. The study had an open-label design. A 1-year duration is insufficient to assess long-term diabetes- and cardiovascular-related outcomes.

DISCLOSURES:

The study was funded by Novo Nordisk A/S.
 

A version of this article appeared on Medscape.com.

TOPLINE:

In insulin-naive people with type 2 diabetes, once-weekly icodec titrated with a dosing guide app was both noninferior and superior to daily basal analogs in reducing A1c levels, with improved treatment satisfaction and compliance scores and similarly low hypoglycemia rates.

METHODOLOGY:

• A 52-week, randomized, open-label, parallel-group, phase 3a trial with real-world elements was conducted at 176 sites in seven countries.
• A total of 1,085 insulin-naive patients with type 2 diabetes were randomly assigned to receive icodec with a dosing guide app or daily analogs (U100 glargine, U300 glargine, or icodec).

TAKEAWAY:

• A1c levels dropped from 8.96% at baseline to 7.24% at week 52 with icodec and from 8.88% to 7.61% with the daily analog, a treatment difference of 0.37 percentage point (P < .001 for noninferiority and P = .009 for superiority in favor of icodec plus the app).
• Patient-reported outcomes were more favorable with icodec plus the app vs. daily analogs, with estimated treatment differences that were significant for the Treatment Related Impact Measure for Diabetes (3.04) but not the Diabetes Treatment Satisfaction Questionnaire (0.78).
• Observed rates of combined clinically significant or severe hypoglycemia were low (0.19 event per patient-year of exposure for icodec plus the app vs. 0.14 for daily analogs; estimated rate ratio, 1.17).

IN PRACTICE:

“Once-weekly icodec with a dosing guide app could conceivably address several challenges seen in everyday practice, including inadequate dose titration and nonadherence to prescribed treatment regimens.”

SOURCE:

The study was conducted by Harpreet S. Bajaj, MD, MPH, of LMC Diabetes and Endocrinology, Brampton, Ontario, and colleagues. It was published online in Annals of Internal Medicine.

LIMITATIONS:

The research could not differentiate between the effects of icodec and those of the dosing guide app. The study had an open-label design. A 1-year duration is insufficient to assess long-term diabetes- and cardiovascular-related outcomes.

DISCLOSURES:

The study was funded by Novo Nordisk A/S.
 

A version of this article appeared on Medscape.com.

TOPLINE:

In insulin-naive people with type 2 diabetes, once-weekly icodec titrated with a dosing guide app was both noninferior and superior to daily basal analogs in reducing A1c levels, with improved treatment satisfaction and compliance scores and similarly low hypoglycemia rates.

METHODOLOGY:

• A 52-week, randomized, open-label, parallel-group, phase 3a trial with real-world elements was conducted at 176 sites in seven countries.
• A total of 1,085 insulin-naive patients with type 2 diabetes were randomly assigned to receive icodec with a dosing guide app or daily analogs (U100 glargine, U300 glargine, or icodec).

TAKEAWAY:

• A1c levels dropped from 8.96% at baseline to 7.24% at week 52 with icodec and from 8.88% to 7.61% with the daily analog, a treatment difference of 0.37 percentage point (P < .001 for noninferiority and P = .009 for superiority in favor of icodec plus the app).
• Patient-reported outcomes were more favorable with icodec plus the app vs. daily analogs, with estimated treatment differences that were significant for the Treatment Related Impact Measure for Diabetes (3.04) but not the Diabetes Treatment Satisfaction Questionnaire (0.78).
• Observed rates of combined clinically significant or severe hypoglycemia were low (0.19 event per patient-year of exposure for icodec plus the app vs. 0.14 for daily analogs; estimated rate ratio, 1.17).

IN PRACTICE:

“Once-weekly icodec with a dosing guide app could conceivably address several challenges seen in everyday practice, including inadequate dose titration and nonadherence to prescribed treatment regimens.”

SOURCE:

The study was conducted by Harpreet S. Bajaj, MD, MPH, of LMC Diabetes and Endocrinology, Brampton, Ontario, and colleagues. It was published online in Annals of Internal Medicine.

LIMITATIONS:

The research could not differentiate between the effects of icodec and those of the dosing guide app. The study had an open-label design. A 1-year duration is insufficient to assess long-term diabetes- and cardiovascular-related outcomes.

DISCLOSURES:

The study was funded by Novo Nordisk A/S.
 

A version of this article appeared on Medscape.com.

When they started the open biopsy, surgeons didn’t know what they were going to find, but they certainly didn’t expect this.

The stringlike worm was five-sixteenths of an inch long, was alive, and wiggled.

“It stunned everyone in that operating theater,” Sanjaya Senanayake, MBBS, an associate professor of infectious disease at Australian National University, Canberra, and senior author of the case report, said in an interview. “When you operate on a brain, you don’t expect to find anything alive.”

The parasitic worm was about half the width of a dime. Helminths like it can usually be seen with the naked eye but are often found in the intestines after being transmitted by soil and infecting the gastrointestinal tract. But this one made it into a woman’s brain in a first-of-its-kind case reported in the journal Emerging Infectious Diseases).

“We weren’t suspecting a worm at all,” Dr. Senanayake said. “There was something abnormal there. Was it going to be granulomatous lesion? Was it going to be cancer? Who knows, but it needed to be biopsied, and a worm was the last thing at the back of anyone’s mind,” he said.
 

A year of inexplicable symptoms

The 64-year-old woman was diagnosed with pneumonia and had a high white blood cell count, low hemoglobin, high platelets, and a very high C-reactive protein of 102 mg/L.

She hadn’t fully recovered from her illness when the abdominal pain and diarrhea started. And then she had a dry cough and night sweats.

After 3 weeks of discomfort, she was admitted to the hospital. She had a history of diabetes, hypothyroidism, and depression, and doctors began looking for answers to her acute illness.

They tested for autoimmune diseases and parasitic infections and prescribed prednisolone to help ease symptoms.

But 3 weeks later, her fever and cough persisted, and she was readmitted to the hospital. Doctors ordered more tests, and her eosinophils were still high, plus there were lesions on her liver, spleen, and lungs.

But tests were negative for bacterial, fungal, and mycobacterial cultures. Her stools showed no evidence of parasites.

She was prescribed mycophenolate and then ivermectin in case her tests for roundworm were a false negative. Doctors suspected Strongyloides, but lesions remained on her spleen even as the liver and lung lesions improved.

Reducing the prednisolone dose affected respiratory symptoms, so by January 2022, a year after initial symptoms began, the medical team added the monoclonal antibody mepolizumab. But her symptoms worsened, and she developed forgetfulness and more depression.

After a brain MRI revealed a right frontal lobe lesion, the team recommended an open biopsy and discovered the worm. The specimen was Ophidascaris robertsi, the intestinal roundworm typically of the carpet python. Never before seen in a human, the only other animals in its life cycle are small marsupials or mammals consumed by pythons.
 

A snake’s bug

Although this is the first case of an Ophidascaris infection in a human, other cases could occur, warn the doctors in their case report.

The best guess for how the patient contracted the infection was by inadvertently consuming larval eggs on wild vegetation that she collected near her home to eat. She lived near a lake known to be home to carpet pythons, so the eggs could have been on the plants she collected or on her hands or kitchen equipment.

“If you’re foraging or using native grasses or plants in recipes, it would be a good idea to cook those instead of having a salad,” Dr. Senanayake said. “That would make the chance of getting something really rare even less likely.”

It’s unclear how or why the worm, which usually stays in the gut, made its way into the patient’s brain, but her long course of immunosuppressing drugs may have played a role, the team points out. “If the normal immune barriers are reduced, then it’s easier for the parasite to move around between organ systems,” Dr. Senanayake said.

Doctors also wondered if she may have been getting re-infected when she went home between hospital admissions. After removing the worm, she received 4 weeks of treatment with albendazole to eliminate any other possible larvae in other organs, especially since Ophidascaris larvae have been known to survive for long periods – more than 4 years in laboratory rats. “The hope is that she’s been cured of this parasitic infection,” Dr. Senanayake said.

As people around the world contend with the global COVID pandemic, they might not realize that new infections are arising around the world every year, he explained.
 

Novel parasitic infections

“The reality is that 30 new infections appeared in the last 30 years, and three-quarters of them are zoonotic, animal infections spilling over into the human world,” Dr. Senanayake said.

Though some of that number is the result of improved surveillance and diagnostics, a real increase has been occurring as human settlements continue expanding.

“This is just a reflection of how burgeoning human populations are encroaching upon animal habitats, and we’re getting more interactions between humans and wild animals, domestic animals and wild animals, and humans and natural flora, which is increasing the risk of this type of infection being recognized,” he explained.

The Ophidascaris worm found in this instance is in other snake species in different continents around the world, too. “Awareness of this case will hopefully lead to the diagnosis and treatment of other cases,” Dr. Senanayake added.

Though it’s certainly surprising to find this particular parasite in a human, finding a zoonotic organism in a person isn’t that strange, according to Janet Foley, DVM, PhD, a professor of veterinary medicine at the University of California, Davis. This is especially true if the usual host is closely related to humans, like primates, or spends a lot of time around them, like rats.

“There are still a lot of parasites and diseases out there in wildlife that haven’t been discovered, and we don’t know the risk,” said Dr. Foley. “But still, the risk would have to be low, generally, or we would see more human cases.”

In the United States, the roundworm common in raccoon feces is Baylisascaris procyonis and can be dangerous for people. “There have been deaths in people exposed to these worms, which do seem to prefer to travel to a human brain,” Dr. Foley said.

A 2016 Centers for Disease Control and Prevention report described seven U.S. cases identified between May 2013 and December 2015, including six that caused central nervous system disease. Another case report in 2018 involved a toddler who had eaten dirt and animal feces in his backyard.

And this past June, an Emerging Infectious Diseases case report described a B. procyonis infection in a 7-year-old with autism spectrum disorder and a history of pica. He had put material in his mouth from the ground near a tree where epidemiologists later found raccoon feces.

Still, Dr. Senanayake cautions against people jumping to conclusions about parasitic infections when they experience symptoms that aren’t otherwise immediately explainable.

The typical person who develops forgetfulness, depression, and a fever probably doesn’t have a worm in their brain or need an immediate MRI, he pointed out. “There may be other cases out there, but common things happen commonly, and this is likely to be rare,” Dr. Senanayake said.

This case demonstrates the challenge in picking a course of treatment when the differential diagnoses for hypereosinophilic syndromes is so broad.
 

Tricky hypereosinophilic syndromes

One of those differentials for the syndromes is parasitic infections, for which treatment would be antiparasitic agents, but another differential is an autoimmune condition that would call for immunosuppression.

“Obviously, as with this case, you don’t want to give someone immunosuppressive treatment if they’ve got a parasite, so you want to look really hard for a parasite before you start them on immunosuppressive treatment for an immunological condition,” Dr. Senanayake said.

But all the blood tests for different antibodies came back negative for parasites, “and this parasite was simply difficult to find until they pulled it from her brain,” he said.

Infectious disease physicians are always looking for the unusual and exotic, Dr. Senanayake explained. But it’s important to exclude the common, easy things first, he added. It’s after exhausting all the likely culprits that “you have to start really thinking laterally and putting resources into unusual tests.”

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

When they started the open biopsy, surgeons didn’t know what they were going to find, but they certainly didn’t expect this.

The stringlike worm was five-sixteenths of an inch long, was alive, and wiggled.

“It stunned everyone in that operating theater,” Sanjaya Senanayake, MBBS, an associate professor of infectious disease at Australian National University, Canberra, and senior author of the case report, said in an interview. “When you operate on a brain, you don’t expect to find anything alive.”

The parasitic worm was about half the width of a dime. Helminths like it can usually be seen with the naked eye but are often found in the intestines after being transmitted by soil and infecting the gastrointestinal tract. But this one made it into a woman’s brain in a first-of-its-kind case reported in the journal Emerging Infectious Diseases).

“We weren’t suspecting a worm at all,” Dr. Senanayake said. “There was something abnormal there. Was it going to be granulomatous lesion? Was it going to be cancer? Who knows, but it needed to be biopsied, and a worm was the last thing at the back of anyone’s mind,” he said.
 

A year of inexplicable symptoms

The 64-year-old woman was diagnosed with pneumonia and had a high white blood cell count, low hemoglobin, high platelets, and a very high C-reactive protein of 102 mg/L.

She hadn’t fully recovered from her illness when the abdominal pain and diarrhea started. And then she had a dry cough and night sweats.

After 3 weeks of discomfort, she was admitted to the hospital. She had a history of diabetes, hypothyroidism, and depression, and doctors began looking for answers to her acute illness.

They tested for autoimmune diseases and parasitic infections and prescribed prednisolone to help ease symptoms.

But 3 weeks later, her fever and cough persisted, and she was readmitted to the hospital. Doctors ordered more tests, and her eosinophils were still high, plus there were lesions on her liver, spleen, and lungs.

But tests were negative for bacterial, fungal, and mycobacterial cultures. Her stools showed no evidence of parasites.

She was prescribed mycophenolate and then ivermectin in case her tests for roundworm were a false negative. Doctors suspected Strongyloides, but lesions remained on her spleen even as the liver and lung lesions improved.

Reducing the prednisolone dose affected respiratory symptoms, so by January 2022, a year after initial symptoms began, the medical team added the monoclonal antibody mepolizumab. But her symptoms worsened, and she developed forgetfulness and more depression.

After a brain MRI revealed a right frontal lobe lesion, the team recommended an open biopsy and discovered the worm. The specimen was Ophidascaris robertsi, the intestinal roundworm typically of the carpet python. Never before seen in a human, the only other animals in its life cycle are small marsupials or mammals consumed by pythons.
 

A snake’s bug

Although this is the first case of an Ophidascaris infection in a human, other cases could occur, warn the doctors in their case report.

The best guess for how the patient contracted the infection was by inadvertently consuming larval eggs on wild vegetation that she collected near her home to eat. She lived near a lake known to be home to carpet pythons, so the eggs could have been on the plants she collected or on her hands or kitchen equipment.

“If you’re foraging or using native grasses or plants in recipes, it would be a good idea to cook those instead of having a salad,” Dr. Senanayake said. “That would make the chance of getting something really rare even less likely.”

It’s unclear how or why the worm, which usually stays in the gut, made its way into the patient’s brain, but her long course of immunosuppressing drugs may have played a role, the team points out. “If the normal immune barriers are reduced, then it’s easier for the parasite to move around between organ systems,” Dr. Senanayake said.

Doctors also wondered if she may have been getting re-infected when she went home between hospital admissions. After removing the worm, she received 4 weeks of treatment with albendazole to eliminate any other possible larvae in other organs, especially since Ophidascaris larvae have been known to survive for long periods – more than 4 years in laboratory rats. “The hope is that she’s been cured of this parasitic infection,” Dr. Senanayake said.

As people around the world contend with the global COVID pandemic, they might not realize that new infections are arising around the world every year, he explained.
 

Novel parasitic infections

“The reality is that 30 new infections appeared in the last 30 years, and three-quarters of them are zoonotic, animal infections spilling over into the human world,” Dr. Senanayake said.

Though some of that number is the result of improved surveillance and diagnostics, a real increase has been occurring as human settlements continue expanding.

“This is just a reflection of how burgeoning human populations are encroaching upon animal habitats, and we’re getting more interactions between humans and wild animals, domestic animals and wild animals, and humans and natural flora, which is increasing the risk of this type of infection being recognized,” he explained.

The Ophidascaris worm found in this instance is in other snake species in different continents around the world, too. “Awareness of this case will hopefully lead to the diagnosis and treatment of other cases,” Dr. Senanayake added.

Though it’s certainly surprising to find this particular parasite in a human, finding a zoonotic organism in a person isn’t that strange, according to Janet Foley, DVM, PhD, a professor of veterinary medicine at the University of California, Davis. This is especially true if the usual host is closely related to humans, like primates, or spends a lot of time around them, like rats.

“There are still a lot of parasites and diseases out there in wildlife that haven’t been discovered, and we don’t know the risk,” said Dr. Foley. “But still, the risk would have to be low, generally, or we would see more human cases.”

In the United States, the roundworm common in raccoon feces is Baylisascaris procyonis and can be dangerous for people. “There have been deaths in people exposed to these worms, which do seem to prefer to travel to a human brain,” Dr. Foley said.

A 2016 Centers for Disease Control and Prevention report described seven U.S. cases identified between May 2013 and December 2015, including six that caused central nervous system disease. Another case report in 2018 involved a toddler who had eaten dirt and animal feces in his backyard.

And this past June, an Emerging Infectious Diseases case report described a B. procyonis infection in a 7-year-old with autism spectrum disorder and a history of pica. He had put material in his mouth from the ground near a tree where epidemiologists later found raccoon feces.

Still, Dr. Senanayake cautions against people jumping to conclusions about parasitic infections when they experience symptoms that aren’t otherwise immediately explainable.

The typical person who develops forgetfulness, depression, and a fever probably doesn’t have a worm in their brain or need an immediate MRI, he pointed out. “There may be other cases out there, but common things happen commonly, and this is likely to be rare,” Dr. Senanayake said.

This case demonstrates the challenge in picking a course of treatment when the differential diagnoses for hypereosinophilic syndromes is so broad.
 

Tricky hypereosinophilic syndromes

One of those differentials for the syndromes is parasitic infections, for which treatment would be antiparasitic agents, but another differential is an autoimmune condition that would call for immunosuppression.

“Obviously, as with this case, you don’t want to give someone immunosuppressive treatment if they’ve got a parasite, so you want to look really hard for a parasite before you start them on immunosuppressive treatment for an immunological condition,” Dr. Senanayake said.

But all the blood tests for different antibodies came back negative for parasites, “and this parasite was simply difficult to find until they pulled it from her brain,” he said.

Infectious disease physicians are always looking for the unusual and exotic, Dr. Senanayake explained. But it’s important to exclude the common, easy things first, he added. It’s after exhausting all the likely culprits that “you have to start really thinking laterally and putting resources into unusual tests.”

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

When they started the open biopsy, surgeons didn’t know what they were going to find, but they certainly didn’t expect this.

The stringlike worm was five-sixteenths of an inch long, was alive, and wiggled.

“It stunned everyone in that operating theater,” Sanjaya Senanayake, MBBS, an associate professor of infectious disease at Australian National University, Canberra, and senior author of the case report, said in an interview. “When you operate on a brain, you don’t expect to find anything alive.”

The parasitic worm was about half the width of a dime. Helminths like it can usually be seen with the naked eye but are often found in the intestines after being transmitted by soil and infecting the gastrointestinal tract. But this one made it into a woman’s brain in a first-of-its-kind case reported in the journal Emerging Infectious Diseases).

“We weren’t suspecting a worm at all,” Dr. Senanayake said. “There was something abnormal there. Was it going to be granulomatous lesion? Was it going to be cancer? Who knows, but it needed to be biopsied, and a worm was the last thing at the back of anyone’s mind,” he said.
 

A year of inexplicable symptoms

The 64-year-old woman was diagnosed with pneumonia and had a high white blood cell count, low hemoglobin, high platelets, and a very high C-reactive protein of 102 mg/L.

She hadn’t fully recovered from her illness when the abdominal pain and diarrhea started. And then she had a dry cough and night sweats.

After 3 weeks of discomfort, she was admitted to the hospital. She had a history of diabetes, hypothyroidism, and depression, and doctors began looking for answers to her acute illness.

They tested for autoimmune diseases and parasitic infections and prescribed prednisolone to help ease symptoms.

But 3 weeks later, her fever and cough persisted, and she was readmitted to the hospital. Doctors ordered more tests, and her eosinophils were still high, plus there were lesions on her liver, spleen, and lungs.

But tests were negative for bacterial, fungal, and mycobacterial cultures. Her stools showed no evidence of parasites.

She was prescribed mycophenolate and then ivermectin in case her tests for roundworm were a false negative. Doctors suspected Strongyloides, but lesions remained on her spleen even as the liver and lung lesions improved.

Reducing the prednisolone dose affected respiratory symptoms, so by January 2022, a year after initial symptoms began, the medical team added the monoclonal antibody mepolizumab. But her symptoms worsened, and she developed forgetfulness and more depression.

After a brain MRI revealed a right frontal lobe lesion, the team recommended an open biopsy and discovered the worm. The specimen was Ophidascaris robertsi, the intestinal roundworm typically of the carpet python. Never before seen in a human, the only other animals in its life cycle are small marsupials or mammals consumed by pythons.
 

A snake’s bug

Although this is the first case of an Ophidascaris infection in a human, other cases could occur, warn the doctors in their case report.

The best guess for how the patient contracted the infection was by inadvertently consuming larval eggs on wild vegetation that she collected near her home to eat. She lived near a lake known to be home to carpet pythons, so the eggs could have been on the plants she collected or on her hands or kitchen equipment.

“If you’re foraging or using native grasses or plants in recipes, it would be a good idea to cook those instead of having a salad,” Dr. Senanayake said. “That would make the chance of getting something really rare even less likely.”

It’s unclear how or why the worm, which usually stays in the gut, made its way into the patient’s brain, but her long course of immunosuppressing drugs may have played a role, the team points out. “If the normal immune barriers are reduced, then it’s easier for the parasite to move around between organ systems,” Dr. Senanayake said.

Doctors also wondered if she may have been getting re-infected when she went home between hospital admissions. After removing the worm, she received 4 weeks of treatment with albendazole to eliminate any other possible larvae in other organs, especially since Ophidascaris larvae have been known to survive for long periods – more than 4 years in laboratory rats. “The hope is that she’s been cured of this parasitic infection,” Dr. Senanayake said.

As people around the world contend with the global COVID pandemic, they might not realize that new infections are arising around the world every year, he explained.
 

Novel parasitic infections

“The reality is that 30 new infections appeared in the last 30 years, and three-quarters of them are zoonotic, animal infections spilling over into the human world,” Dr. Senanayake said.

Though some of that number is the result of improved surveillance and diagnostics, a real increase has been occurring as human settlements continue expanding.

“This is just a reflection of how burgeoning human populations are encroaching upon animal habitats, and we’re getting more interactions between humans and wild animals, domestic animals and wild animals, and humans and natural flora, which is increasing the risk of this type of infection being recognized,” he explained.

The Ophidascaris worm found in this instance is in other snake species in different continents around the world, too. “Awareness of this case will hopefully lead to the diagnosis and treatment of other cases,” Dr. Senanayake added.

Though it’s certainly surprising to find this particular parasite in a human, finding a zoonotic organism in a person isn’t that strange, according to Janet Foley, DVM, PhD, a professor of veterinary medicine at the University of California, Davis. This is especially true if the usual host is closely related to humans, like primates, or spends a lot of time around them, like rats.

“There are still a lot of parasites and diseases out there in wildlife that haven’t been discovered, and we don’t know the risk,” said Dr. Foley. “But still, the risk would have to be low, generally, or we would see more human cases.”

In the United States, the roundworm common in raccoon feces is Baylisascaris procyonis and can be dangerous for people. “There have been deaths in people exposed to these worms, which do seem to prefer to travel to a human brain,” Dr. Foley said.

A 2016 Centers for Disease Control and Prevention report described seven U.S. cases identified between May 2013 and December 2015, including six that caused central nervous system disease. Another case report in 2018 involved a toddler who had eaten dirt and animal feces in his backyard.

And this past June, an Emerging Infectious Diseases case report described a B. procyonis infection in a 7-year-old with autism spectrum disorder and a history of pica. He had put material in his mouth from the ground near a tree where epidemiologists later found raccoon feces.

Still, Dr. Senanayake cautions against people jumping to conclusions about parasitic infections when they experience symptoms that aren’t otherwise immediately explainable.

The typical person who develops forgetfulness, depression, and a fever probably doesn’t have a worm in their brain or need an immediate MRI, he pointed out. “There may be other cases out there, but common things happen commonly, and this is likely to be rare,” Dr. Senanayake said.

This case demonstrates the challenge in picking a course of treatment when the differential diagnoses for hypereosinophilic syndromes is so broad.
 

Tricky hypereosinophilic syndromes

One of those differentials for the syndromes is parasitic infections, for which treatment would be antiparasitic agents, but another differential is an autoimmune condition that would call for immunosuppression.

“Obviously, as with this case, you don’t want to give someone immunosuppressive treatment if they’ve got a parasite, so you want to look really hard for a parasite before you start them on immunosuppressive treatment for an immunological condition,” Dr. Senanayake said.

But all the blood tests for different antibodies came back negative for parasites, “and this parasite was simply difficult to find until they pulled it from her brain,” he said.

Infectious disease physicians are always looking for the unusual and exotic, Dr. Senanayake explained. But it’s important to exclude the common, easy things first, he added. It’s after exhausting all the likely culprits that “you have to start really thinking laterally and putting resources into unusual tests.”

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

Vitamin D deficiency appears to render people more vulnerable to canagliflozin’s adverse effects on bone health, whereas vitamin D3 supplementation appears protective of individuals with vitamin D deficiency.

Sodium-glucose cotransporter 2 (SGLT2) inhibitors are beneficial for treating type 2 diabetes and reducing cardiovascular and kidney disease risk. However, some, but not all, trial data have linked the SLGT2 inhibitor canagliflozin to increased fracture risk. That particular agent has been reported to accelerate loss of bone mineral density, which could contribute to fracture risk. Other drugs in the class have also been implicated in worsening markers of bone health.

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

Vitamin D deficiency appears to render people more vulnerable to canagliflozin’s adverse effects on bone health, whereas vitamin D3 supplementation appears protective of individuals with vitamin D deficiency.

Sodium-glucose cotransporter 2 (SGLT2) inhibitors are beneficial for treating type 2 diabetes and reducing cardiovascular and kidney disease risk. However, some, but not all, trial data have linked the SLGT2 inhibitor canagliflozin to increased fracture risk. That particular agent has been reported to accelerate loss of bone mineral density, which could contribute to fracture risk. Other drugs in the class have also been implicated in worsening markers of bone health.

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

Vitamin D deficiency appears to render people more vulnerable to canagliflozin’s adverse effects on bone health, whereas vitamin D3 supplementation appears protective of individuals with vitamin D deficiency.

Sodium-glucose cotransporter 2 (SGLT2) inhibitors are beneficial for treating type 2 diabetes and reducing cardiovascular and kidney disease risk. However, some, but not all, trial data have linked the SLGT2 inhibitor canagliflozin to increased fracture risk. That particular agent has been reported to accelerate loss of bone mineral density, which could contribute to fracture risk. Other drugs in the class have also been implicated in worsening markers of bone health.

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

The American Academy of Pediatrics recommends against low-carbohydrate diets for most children and adolescents with or at risk for diabetes, according to a new clinical report.

Citing a lack of high-quality data and potential for adverse effects with carbohydrate restriction among younger individuals, lead author Anna Neyman, MD, of Indiana University, Indianapolis, and colleagues suggested that pediatric patients with type 2 diabetes should focus on reducing nutrient-poor carbohydrate intake, while those with type 1 diabetes should only pursue broader carbohydrate restriction under close medical supervision.

“There are no guidelines for restricting dietary carbohydrate consumption to reduce risk for diabetes or improve diabetes outcomes in youth,” the investigators wrote in Pediatrics. “Thus, there is a need to provide practical recommendations for pediatricians regarding the use of low-carbohydrate diets in patients who elect to follow these diets, including those with type 1 diabetes and for patients with obesity, prediabetes, and type 2 diabetes.”

Their new report includes a summary of the various types of carbohydrate-restricted diets, a review of available evidence for these diets among pediatric patients with type 1 and type 2 diabetes, and several practical recommendations based on their findings.

Dr. Neyman and colleagues first noted a lack of standardization in describing the various tiers of carbohydrate restriction; however, they offered some rough guidelines. Compared with a typical, balanced diet, which includes 45%-65% of calories from carbohydrates, a moderately restrictive diet includes 26%-44% of calories from carbohydrates, while a low-carb diet includes less than 26% of calories from carbs. Further down the scale, very low-carb diets and ketogenic diets call for 20-50 g of carbs per day or less than 20 g of carbs per day, respectively.

“There is evidence from adult studies that these diets can be associated with significant weight loss, reduction in insulin levels or insulin requirements, and improvement in glucose control,” the investigators noted. “Nevertheless, there is a lack of long-term safety and efficacy outcomes in youth.”

They went on to cite a range of safety concerns, including “growth deceleration, nutritional deficiencies, poor bone health, nutritional ketosis that cannot be distinguished from ketosis resulting from insulin deficiency, and disordered eating behaviors.”

“Body dissatisfaction associated with restrictive dieting practices places children and adolescents at risk for inadequate dietary intake, excessive weight gain resulting from binge-eating after restricting food intake, and use of harmful weight-control strategies,” the investigators wrote. “Moreover, restrictive dieting practices may negatively impact mental health and self-concept and are directly associated with decreased mood and increased feelings of anxiety.”

Until more evidence is available, Dr. Neyman and colleagues advised adherence to a balanced diet, including increased dietary fiber and reduced consumption of ultra-processed carbohydrates.

“Eliminating sugary beverages and juices significantly improves blood glucose and weight management in children and adolescents,” they noted.

For pediatric patients with type 1 diabetes, the investigators suggested that low-carb and very low-carb diets should only be pursued “under close diabetes care team supervision utilizing safety guidelines.”
 

Lack of evidence is the problem

David Ludwig, MD, PhD, codirector of the New Balance Foundation Obesity Prevention Center, Boston Children’s Hospital, and professor of pediatrics at Harvard Medical School, also in Boston, said the review is “rather general” and “reiterates common, although not always fair, concerns about carbohydrate restriction.”

courtesy Boston Children&#039;s Hospital

“The main issue they highlight is the lack of evidence, especially from clinical trials, for a low-carbohydrate diet in children, as related to diabetes,” Dr. Ludwig said in a written comment, noting that this is indeed an issue. “However, what needs to be recognized is that a conventional high-carbohydrate diet has never been shown to be superior in adults or children for diabetes. Furthermore, whereas a poorly formulated low-carb diet may have adverse effects and risks (e.g., nutrient deficiencies), so can a high-carbohydrate diet – including an increase in triglycerides and other risk factors comprising metabolic syndrome.”

He said that the “main challenge in diabetes is to control blood glucose after eating,” and a high-carb makes this more difficult, as it requires more insulin after a meal than a low-carb meal would require, and increases risk of subsequent hypoglycemia.

For those interested in an alternative perspective to the AAP clinical report, Dr. Ludwig recommended two of his recent review articles, including one published in the Journal of Nutrition and another from the Journal of Clinical Investigation. In both, notes the long history of carbohydrate restriction for patients with diabetes, with usage dating back to the 1700s. Although the diet fell out of favor with the introduction of insulin, Dr. Ludwig believes that it needs to be reconsidered, and is more than a passing fad.

“Preliminary research suggests that this dietary approach might transform clinical management and perhaps normalize HbA1c for many people with diabetes, at substantially reduced treatment costs,” Dr. Ludwig and colleagues wrote in the JCI review. “High-quality randomized controlled trials, with intensive support for behavior changes, will be needed to address this possibility and assess long-term safety and sustainability. With total medical costs of diabetes in the United States approaching $1 billion a day, this research must assume high priority.”

This clinical report was commissioned by the AAP. Dr. Ludwig received royalties for books that recommend a carbohydrate-modified diet.

This article was updated 9/20/23.

The American Academy of Pediatrics recommends against low-carbohydrate diets for most children and adolescents with or at risk for diabetes, according to a new clinical report.

Citing a lack of high-quality data and potential for adverse effects with carbohydrate restriction among younger individuals, lead author Anna Neyman, MD, of Indiana University, Indianapolis, and colleagues suggested that pediatric patients with type 2 diabetes should focus on reducing nutrient-poor carbohydrate intake, while those with type 1 diabetes should only pursue broader carbohydrate restriction under close medical supervision.

“There are no guidelines for restricting dietary carbohydrate consumption to reduce risk for diabetes or improve diabetes outcomes in youth,” the investigators wrote in Pediatrics. “Thus, there is a need to provide practical recommendations for pediatricians regarding the use of low-carbohydrate diets in patients who elect to follow these diets, including those with type 1 diabetes and for patients with obesity, prediabetes, and type 2 diabetes.”

Their new report includes a summary of the various types of carbohydrate-restricted diets, a review of available evidence for these diets among pediatric patients with type 1 and type 2 diabetes, and several practical recommendations based on their findings.

Dr. Neyman and colleagues first noted a lack of standardization in describing the various tiers of carbohydrate restriction; however, they offered some rough guidelines. Compared with a typical, balanced diet, which includes 45%-65% of calories from carbohydrates, a moderately restrictive diet includes 26%-44% of calories from carbohydrates, while a low-carb diet includes less than 26% of calories from carbs. Further down the scale, very low-carb diets and ketogenic diets call for 20-50 g of carbs per day or less than 20 g of carbs per day, respectively.

“There is evidence from adult studies that these diets can be associated with significant weight loss, reduction in insulin levels or insulin requirements, and improvement in glucose control,” the investigators noted. “Nevertheless, there is a lack of long-term safety and efficacy outcomes in youth.”

They went on to cite a range of safety concerns, including “growth deceleration, nutritional deficiencies, poor bone health, nutritional ketosis that cannot be distinguished from ketosis resulting from insulin deficiency, and disordered eating behaviors.”

“Body dissatisfaction associated with restrictive dieting practices places children and adolescents at risk for inadequate dietary intake, excessive weight gain resulting from binge-eating after restricting food intake, and use of harmful weight-control strategies,” the investigators wrote. “Moreover, restrictive dieting practices may negatively impact mental health and self-concept and are directly associated with decreased mood and increased feelings of anxiety.”

Until more evidence is available, Dr. Neyman and colleagues advised adherence to a balanced diet, including increased dietary fiber and reduced consumption of ultra-processed carbohydrates.

“Eliminating sugary beverages and juices significantly improves blood glucose and weight management in children and adolescents,” they noted.

For pediatric patients with type 1 diabetes, the investigators suggested that low-carb and very low-carb diets should only be pursued “under close diabetes care team supervision utilizing safety guidelines.”
 

Lack of evidence is the problem

David Ludwig, MD, PhD, codirector of the New Balance Foundation Obesity Prevention Center, Boston Children’s Hospital, and professor of pediatrics at Harvard Medical School, also in Boston, said the review is “rather general” and “reiterates common, although not always fair, concerns about carbohydrate restriction.”

courtesy Boston Children&#039;s Hospital

“The main issue they highlight is the lack of evidence, especially from clinical trials, for a low-carbohydrate diet in children, as related to diabetes,” Dr. Ludwig said in a written comment, noting that this is indeed an issue. “However, what needs to be recognized is that a conventional high-carbohydrate diet has never been shown to be superior in adults or children for diabetes. Furthermore, whereas a poorly formulated low-carb diet may have adverse effects and risks (e.g., nutrient deficiencies), so can a high-carbohydrate diet – including an increase in triglycerides and other risk factors comprising metabolic syndrome.”

He said that the “main challenge in diabetes is to control blood glucose after eating,” and a high-carb makes this more difficult, as it requires more insulin after a meal than a low-carb meal would require, and increases risk of subsequent hypoglycemia.

For those interested in an alternative perspective to the AAP clinical report, Dr. Ludwig recommended two of his recent review articles, including one published in the Journal of Nutrition and another from the Journal of Clinical Investigation. In both, notes the long history of carbohydrate restriction for patients with diabetes, with usage dating back to the 1700s. Although the diet fell out of favor with the introduction of insulin, Dr. Ludwig believes that it needs to be reconsidered, and is more than a passing fad.

“Preliminary research suggests that this dietary approach might transform clinical management and perhaps normalize HbA1c for many people with diabetes, at substantially reduced treatment costs,” Dr. Ludwig and colleagues wrote in the JCI review. “High-quality randomized controlled trials, with intensive support for behavior changes, will be needed to address this possibility and assess long-term safety and sustainability. With total medical costs of diabetes in the United States approaching $1 billion a day, this research must assume high priority.”

This clinical report was commissioned by the AAP. Dr. Ludwig received royalties for books that recommend a carbohydrate-modified diet.

This article was updated 9/20/23.

The American Academy of Pediatrics recommends against low-carbohydrate diets for most children and adolescents with or at risk for diabetes, according to a new clinical report.

Citing a lack of high-quality data and potential for adverse effects with carbohydrate restriction among younger individuals, lead author Anna Neyman, MD, of Indiana University, Indianapolis, and colleagues suggested that pediatric patients with type 2 diabetes should focus on reducing nutrient-poor carbohydrate intake, while those with type 1 diabetes should only pursue broader carbohydrate restriction under close medical supervision.

“There are no guidelines for restricting dietary carbohydrate consumption to reduce risk for diabetes or improve diabetes outcomes in youth,” the investigators wrote in Pediatrics. “Thus, there is a need to provide practical recommendations for pediatricians regarding the use of low-carbohydrate diets in patients who elect to follow these diets, including those with type 1 diabetes and for patients with obesity, prediabetes, and type 2 diabetes.”

Their new report includes a summary of the various types of carbohydrate-restricted diets, a review of available evidence for these diets among pediatric patients with type 1 and type 2 diabetes, and several practical recommendations based on their findings.

Dr. Neyman and colleagues first noted a lack of standardization in describing the various tiers of carbohydrate restriction; however, they offered some rough guidelines. Compared with a typical, balanced diet, which includes 45%-65% of calories from carbohydrates, a moderately restrictive diet includes 26%-44% of calories from carbohydrates, while a low-carb diet includes less than 26% of calories from carbs. Further down the scale, very low-carb diets and ketogenic diets call for 20-50 g of carbs per day or less than 20 g of carbs per day, respectively.

“There is evidence from adult studies that these diets can be associated with significant weight loss, reduction in insulin levels or insulin requirements, and improvement in glucose control,” the investigators noted. “Nevertheless, there is a lack of long-term safety and efficacy outcomes in youth.”

They went on to cite a range of safety concerns, including “growth deceleration, nutritional deficiencies, poor bone health, nutritional ketosis that cannot be distinguished from ketosis resulting from insulin deficiency, and disordered eating behaviors.”

“Body dissatisfaction associated with restrictive dieting practices places children and adolescents at risk for inadequate dietary intake, excessive weight gain resulting from binge-eating after restricting food intake, and use of harmful weight-control strategies,” the investigators wrote. “Moreover, restrictive dieting practices may negatively impact mental health and self-concept and are directly associated with decreased mood and increased feelings of anxiety.”

Until more evidence is available, Dr. Neyman and colleagues advised adherence to a balanced diet, including increased dietary fiber and reduced consumption of ultra-processed carbohydrates.

“Eliminating sugary beverages and juices significantly improves blood glucose and weight management in children and adolescents,” they noted.

For pediatric patients with type 1 diabetes, the investigators suggested that low-carb and very low-carb diets should only be pursued “under close diabetes care team supervision utilizing safety guidelines.”
 

Lack of evidence is the problem

David Ludwig, MD, PhD, codirector of the New Balance Foundation Obesity Prevention Center, Boston Children’s Hospital, and professor of pediatrics at Harvard Medical School, also in Boston, said the review is “rather general” and “reiterates common, although not always fair, concerns about carbohydrate restriction.”

courtesy Boston Children&#039;s Hospital

“The main issue they highlight is the lack of evidence, especially from clinical trials, for a low-carbohydrate diet in children, as related to diabetes,” Dr. Ludwig said in a written comment, noting that this is indeed an issue. “However, what needs to be recognized is that a conventional high-carbohydrate diet has never been shown to be superior in adults or children for diabetes. Furthermore, whereas a poorly formulated low-carb diet may have adverse effects and risks (e.g., nutrient deficiencies), so can a high-carbohydrate diet – including an increase in triglycerides and other risk factors comprising metabolic syndrome.”

He said that the “main challenge in diabetes is to control blood glucose after eating,” and a high-carb makes this more difficult, as it requires more insulin after a meal than a low-carb meal would require, and increases risk of subsequent hypoglycemia.

For those interested in an alternative perspective to the AAP clinical report, Dr. Ludwig recommended two of his recent review articles, including one published in the Journal of Nutrition and another from the Journal of Clinical Investigation. In both, notes the long history of carbohydrate restriction for patients with diabetes, with usage dating back to the 1700s. Although the diet fell out of favor with the introduction of insulin, Dr. Ludwig believes that it needs to be reconsidered, and is more than a passing fad.

“Preliminary research suggests that this dietary approach might transform clinical management and perhaps normalize HbA1c for many people with diabetes, at substantially reduced treatment costs,” Dr. Ludwig and colleagues wrote in the JCI review. “High-quality randomized controlled trials, with intensive support for behavior changes, will be needed to address this possibility and assess long-term safety and sustainability. With total medical costs of diabetes in the United States approaching $1 billion a day, this research must assume high priority.”

This clinical report was commissioned by the AAP. Dr. Ludwig received royalties for books that recommend a carbohydrate-modified diet.

This article was updated 9/20/23.

Lecanemab (Lequembi, Esai), an amyloid-beta–directed antibody therapy, is approved by the Food and Drug Administration for the treatment of Alzheimer’s disease (AD). But exactly how the drug clears amyloid-beta wasn’t clear.

Now new research suggests the drug, which was approved by the FDA in January, targets a particular molecular cascade, the plasma contact system, which drives amyloid-beta toxicity.

The investigators tested the effectiveness of various forms of amyloid-beta in activating the plasma contact system and found that amyloid-beta protofibrils, known to be the most toxic form of amyloid-beta, promoted the activation of this molecular cascade and that lecanemab inhibited pathway activation.

“In our study, we looked at lecanemab and found it can block the activation of the contact system, which could be one of the reasons that it works so well for AD,” study coinvestigator Erin Norris, PhD, research associate professor, Rockefeller University, New York, said in an interview.

The study was published online in the Proceedings of the National Academy of Science.
 

Unknown mechanism

“Many years ago, we started looking at the involvement of vascular dysfunction in AD,” Dr. Norris said. “We wanted to see whether or not irregular blood clotting or problems with blood flow was problematic in Alzheimer’s patients.”

The researchers found that fibrin, a major component involved in blood clotting, can extravasate into the brain.

“The blood-brain barrier can break down in Alzheimer’s, so things from the blood can move into the brain and deposit there,” she added. Fibrin then interacts with amyloid-beta, the major pathogenic protein in AD.

Dr. Norris explained that fibrin clots can form in two different ways. One is through the normal process that occurs when there’s an injury and bleeding. The second is through intrinsic clotting, which takes place through the contact system.

“We started looking into this system and found that the plasma of Alzheimer’s patients showed irregular levels of these enzymes and proteins that are part of the intrinsic clotting system compared to those of normal controls,” said Dr. Norris.

“This paper was an extension of years studying this pathway and these mechanisms. It was also inspired by the approval of lecanemab and its release for use in Alzheimer’s patients,” she added.

In previous research, the same researchers found that amyloid-beta has different forms. “It’s normally soluble, and it’s a very tiny molecule,” Dr. Norris said. “But over time, and in different situations, it can start to aggregate, becoming bigger and bigger.”
 

Implications beyond Alzheimer’s

Postmortem tissue analysis has found fibrillar plaques that are “clumped together.” These are insoluble and hard to get rid of, she said. “Protofibrils are the step before amyloid-beta forms fibrils and are considered to be the most toxic form, although the mechanism behind why it’s so toxic is not understood.”

Previous research has already shown that amyloid-beta can activate the contact system. The contact system has two “arms,” the first of which is involved with clotting, and the second with inflammation, Dr. Norris said. In fact, it’s the plasma contact system that links vascular and inflammatory pathways.

The plasma contact system leads to the clotting of fibrin, Dr. Norris continued. It activates factor XII, which leads to blood clotting by binding to coagulation factor XI.

The contact system also causes inflammation – the second “arm.” Bradykinin, a potent inflammatory molecule, is released by binding to high-molecular-weight kininogen (HK). In addition to inflammation, bradykinin can cause edema and blood-brain barrier permeability.

Although it’s been known that amyloid-beta can activate the contact system, the particular form of amyloid-beta implicated in this cascade has not been identified. And so, the researchers incubated amyloid-beta42 with human plasma, testing various types of amyloid-beta – monomers, oligomers, protofibrils, and fibrils – to see which would activate the contact system.

Amyloid-beta protofibrils promoted the activation of the contact system, as evidenced by several reactions, including activation of factor XII, while other forms of amyloid-beta did not. HK also “bound tightly” to amyloid-beta protofibrils, with “weaker” binding to other amyloid-beta species, the authors reported, confirming that amyloid-beta protofibrils bind to HK and factor XII.

Bradykinin levels were increased by amyloid-beta protofibrils, which also induced faster clotting, compared with other forms of amyloid-beta.

The researchers introduced lecanemab into the picture and found it “dramatically inhibited” contact system activation induced by amyloid-beta protofibrils. For example, it blocked the binding of factor XII to amyloid-beta. By contrast, human IgG (which the researchers used as a control) had no effect.

Additionally, lecanemab also prevented accelerated intrinsic coagulation in normal human plasma mediated by amyloid-beta protofibril.

Senior author Sidney Strickland, PhD, the Zachary and Elizabeth M. Fisher professor in Alzheimer’s and neurodegenerative disease, Rockefeller University, said in an interview: “One of the strong motivators for conducting this study was the fact that this drug, which is effective in AD, targets this specific form of amyloid-beta; but no one knows why it›s more toxic. We thought we could see if we could tie it to what we›re working on, and we found it ties in beautifully.”

The findings have implications that go beyond AD, Dr. Strickland said. “The contact system is implicated in lots of different pathologies, including sickle cell anemia, sepsis, inflammatory bowel disease, and so on.” Blocking the contact system might be a helpful approach in these conditions too.
 

Innovative, plausible, but still preliminary

In a comment, Heather M. Snyder, PhD, vice president of medical and scientific relations at the Alzheimer’s Association, called the investigation “innovative,” with ideas that are “certainly plausible.” However, “at this time, the work is preliminary and not conclusive.”

The hypothesized mechanisms for why amyloid (lecanemab’s target) is toxic to the brain “does incorporate important AD-related brain changes that have been observed in other studies, including inflammatory/immune changes and vascular-related changes,” said Dr. Snyder, who was not involved with the current study.

However, “additional studies that look both in model systems and in humans are needed to further illuminate these relationships,” Dr. Snyder said.

The study was supported by grants from the National Institutes of Health as well as the Robertson Therapeutic Development Fund, Samuel Newhouse Foundation, John A. Herrmann, and the May and Samuel Rudin Family Foundation. Dr. Norris, Dr. Strickland, and Dr. Snyder declared no relevant financial relationships.

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

Lecanemab (Lequembi, Esai), an amyloid-beta–directed antibody therapy, is approved by the Food and Drug Administration for the treatment of Alzheimer’s disease (AD). But exactly how the drug clears amyloid-beta wasn’t clear.

Now new research suggests the drug, which was approved by the FDA in January, targets a particular molecular cascade, the plasma contact system, which drives amyloid-beta toxicity.

The investigators tested the effectiveness of various forms of amyloid-beta in activating the plasma contact system and found that amyloid-beta protofibrils, known to be the most toxic form of amyloid-beta, promoted the activation of this molecular cascade and that lecanemab inhibited pathway activation.

“In our study, we looked at lecanemab and found it can block the activation of the contact system, which could be one of the reasons that it works so well for AD,” study coinvestigator Erin Norris, PhD, research associate professor, Rockefeller University, New York, said in an interview.

The study was published online in the Proceedings of the National Academy of Science.
 

Unknown mechanism

“Many years ago, we started looking at the involvement of vascular dysfunction in AD,” Dr. Norris said. “We wanted to see whether or not irregular blood clotting or problems with blood flow was problematic in Alzheimer’s patients.”

The researchers found that fibrin, a major component involved in blood clotting, can extravasate into the brain.

“The blood-brain barrier can break down in Alzheimer’s, so things from the blood can move into the brain and deposit there,” she added. Fibrin then interacts with amyloid-beta, the major pathogenic protein in AD.

Dr. Norris explained that fibrin clots can form in two different ways. One is through the normal process that occurs when there’s an injury and bleeding. The second is through intrinsic clotting, which takes place through the contact system.

“We started looking into this system and found that the plasma of Alzheimer’s patients showed irregular levels of these enzymes and proteins that are part of the intrinsic clotting system compared to those of normal controls,” said Dr. Norris.

“This paper was an extension of years studying this pathway and these mechanisms. It was also inspired by the approval of lecanemab and its release for use in Alzheimer’s patients,” she added.

In previous research, the same researchers found that amyloid-beta has different forms. “It’s normally soluble, and it’s a very tiny molecule,” Dr. Norris said. “But over time, and in different situations, it can start to aggregate, becoming bigger and bigger.”
 

Implications beyond Alzheimer’s

Postmortem tissue analysis has found fibrillar plaques that are “clumped together.” These are insoluble and hard to get rid of, she said. “Protofibrils are the step before amyloid-beta forms fibrils and are considered to be the most toxic form, although the mechanism behind why it’s so toxic is not understood.”

Previous research has already shown that amyloid-beta can activate the contact system. The contact system has two “arms,” the first of which is involved with clotting, and the second with inflammation, Dr. Norris said. In fact, it’s the plasma contact system that links vascular and inflammatory pathways.

The plasma contact system leads to the clotting of fibrin, Dr. Norris continued. It activates factor XII, which leads to blood clotting by binding to coagulation factor XI.

The contact system also causes inflammation – the second “arm.” Bradykinin, a potent inflammatory molecule, is released by binding to high-molecular-weight kininogen (HK). In addition to inflammation, bradykinin can cause edema and blood-brain barrier permeability.

Although it’s been known that amyloid-beta can activate the contact system, the particular form of amyloid-beta implicated in this cascade has not been identified. And so, the researchers incubated amyloid-beta42 with human plasma, testing various types of amyloid-beta – monomers, oligomers, protofibrils, and fibrils – to see which would activate the contact system.

Amyloid-beta protofibrils promoted the activation of the contact system, as evidenced by several reactions, including activation of factor XII, while other forms of amyloid-beta did not. HK also “bound tightly” to amyloid-beta protofibrils, with “weaker” binding to other amyloid-beta species, the authors reported, confirming that amyloid-beta protofibrils bind to HK and factor XII.

Bradykinin levels were increased by amyloid-beta protofibrils, which also induced faster clotting, compared with other forms of amyloid-beta.

The researchers introduced lecanemab into the picture and found it “dramatically inhibited” contact system activation induced by amyloid-beta protofibrils. For example, it blocked the binding of factor XII to amyloid-beta. By contrast, human IgG (which the researchers used as a control) had no effect.

Additionally, lecanemab also prevented accelerated intrinsic coagulation in normal human plasma mediated by amyloid-beta protofibril.

Senior author Sidney Strickland, PhD, the Zachary and Elizabeth M. Fisher professor in Alzheimer’s and neurodegenerative disease, Rockefeller University, said in an interview: “One of the strong motivators for conducting this study was the fact that this drug, which is effective in AD, targets this specific form of amyloid-beta; but no one knows why it›s more toxic. We thought we could see if we could tie it to what we›re working on, and we found it ties in beautifully.”

The findings have implications that go beyond AD, Dr. Strickland said. “The contact system is implicated in lots of different pathologies, including sickle cell anemia, sepsis, inflammatory bowel disease, and so on.” Blocking the contact system might be a helpful approach in these conditions too.
 

Innovative, plausible, but still preliminary

In a comment, Heather M. Snyder, PhD, vice president of medical and scientific relations at the Alzheimer’s Association, called the investigation “innovative,” with ideas that are “certainly plausible.” However, “at this time, the work is preliminary and not conclusive.”

The hypothesized mechanisms for why amyloid (lecanemab’s target) is toxic to the brain “does incorporate important AD-related brain changes that have been observed in other studies, including inflammatory/immune changes and vascular-related changes,” said Dr. Snyder, who was not involved with the current study.

However, “additional studies that look both in model systems and in humans are needed to further illuminate these relationships,” Dr. Snyder said.

The study was supported by grants from the National Institutes of Health as well as the Robertson Therapeutic Development Fund, Samuel Newhouse Foundation, John A. Herrmann, and the May and Samuel Rudin Family Foundation. Dr. Norris, Dr. Strickland, and Dr. Snyder declared no relevant financial relationships.

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

Lecanemab (Lequembi, Esai), an amyloid-beta–directed antibody therapy, is approved by the Food and Drug Administration for the treatment of Alzheimer’s disease (AD). But exactly how the drug clears amyloid-beta wasn’t clear.

Now new research suggests the drug, which was approved by the FDA in January, targets a particular molecular cascade, the plasma contact system, which drives amyloid-beta toxicity.

The investigators tested the effectiveness of various forms of amyloid-beta in activating the plasma contact system and found that amyloid-beta protofibrils, known to be the most toxic form of amyloid-beta, promoted the activation of this molecular cascade and that lecanemab inhibited pathway activation.

“In our study, we looked at lecanemab and found it can block the activation of the contact system, which could be one of the reasons that it works so well for AD,” study coinvestigator Erin Norris, PhD, research associate professor, Rockefeller University, New York, said in an interview.

The study was published online in the Proceedings of the National Academy of Science.
 

Unknown mechanism

“Many years ago, we started looking at the involvement of vascular dysfunction in AD,” Dr. Norris said. “We wanted to see whether or not irregular blood clotting or problems with blood flow was problematic in Alzheimer’s patients.”

The researchers found that fibrin, a major component involved in blood clotting, can extravasate into the brain.

“The blood-brain barrier can break down in Alzheimer’s, so things from the blood can move into the brain and deposit there,” she added. Fibrin then interacts with amyloid-beta, the major pathogenic protein in AD.

Dr. Norris explained that fibrin clots can form in two different ways. One is through the normal process that occurs when there’s an injury and bleeding. The second is through intrinsic clotting, which takes place through the contact system.

“We started looking into this system and found that the plasma of Alzheimer’s patients showed irregular levels of these enzymes and proteins that are part of the intrinsic clotting system compared to those of normal controls,” said Dr. Norris.

“This paper was an extension of years studying this pathway and these mechanisms. It was also inspired by the approval of lecanemab and its release for use in Alzheimer’s patients,” she added.

In previous research, the same researchers found that amyloid-beta has different forms. “It’s normally soluble, and it’s a very tiny molecule,” Dr. Norris said. “But over time, and in different situations, it can start to aggregate, becoming bigger and bigger.”
 

Implications beyond Alzheimer’s

Postmortem tissue analysis has found fibrillar plaques that are “clumped together.” These are insoluble and hard to get rid of, she said. “Protofibrils are the step before amyloid-beta forms fibrils and are considered to be the most toxic form, although the mechanism behind why it’s so toxic is not understood.”

Previous research has already shown that amyloid-beta can activate the contact system. The contact system has two “arms,” the first of which is involved with clotting, and the second with inflammation, Dr. Norris said. In fact, it’s the plasma contact system that links vascular and inflammatory pathways.

The plasma contact system leads to the clotting of fibrin, Dr. Norris continued. It activates factor XII, which leads to blood clotting by binding to coagulation factor XI.

The contact system also causes inflammation – the second “arm.” Bradykinin, a potent inflammatory molecule, is released by binding to high-molecular-weight kininogen (HK). In addition to inflammation, bradykinin can cause edema and blood-brain barrier permeability.

Although it’s been known that amyloid-beta can activate the contact system, the particular form of amyloid-beta implicated in this cascade has not been identified. And so, the researchers incubated amyloid-beta42 with human plasma, testing various types of amyloid-beta – monomers, oligomers, protofibrils, and fibrils – to see which would activate the contact system.

Amyloid-beta protofibrils promoted the activation of the contact system, as evidenced by several reactions, including activation of factor XII, while other forms of amyloid-beta did not. HK also “bound tightly” to amyloid-beta protofibrils, with “weaker” binding to other amyloid-beta species, the authors reported, confirming that amyloid-beta protofibrils bind to HK and factor XII.

Bradykinin levels were increased by amyloid-beta protofibrils, which also induced faster clotting, compared with other forms of amyloid-beta.

The researchers introduced lecanemab into the picture and found it “dramatically inhibited” contact system activation induced by amyloid-beta protofibrils. For example, it blocked the binding of factor XII to amyloid-beta. By contrast, human IgG (which the researchers used as a control) had no effect.

Additionally, lecanemab also prevented accelerated intrinsic coagulation in normal human plasma mediated by amyloid-beta protofibril.

Senior author Sidney Strickland, PhD, the Zachary and Elizabeth M. Fisher professor in Alzheimer’s and neurodegenerative disease, Rockefeller University, said in an interview: “One of the strong motivators for conducting this study was the fact that this drug, which is effective in AD, targets this specific form of amyloid-beta; but no one knows why it›s more toxic. We thought we could see if we could tie it to what we›re working on, and we found it ties in beautifully.”

The findings have implications that go beyond AD, Dr. Strickland said. “The contact system is implicated in lots of different pathologies, including sickle cell anemia, sepsis, inflammatory bowel disease, and so on.” Blocking the contact system might be a helpful approach in these conditions too.
 

Innovative, plausible, but still preliminary

In a comment, Heather M. Snyder, PhD, vice president of medical and scientific relations at the Alzheimer’s Association, called the investigation “innovative,” with ideas that are “certainly plausible.” However, “at this time, the work is preliminary and not conclusive.”

The hypothesized mechanisms for why amyloid (lecanemab’s target) is toxic to the brain “does incorporate important AD-related brain changes that have been observed in other studies, including inflammatory/immune changes and vascular-related changes,” said Dr. Snyder, who was not involved with the current study.

However, “additional studies that look both in model systems and in humans are needed to further illuminate these relationships,” Dr. Snyder said.

The study was supported by grants from the National Institutes of Health as well as the Robertson Therapeutic Development Fund, Samuel Newhouse Foundation, John A. Herrmann, and the May and Samuel Rudin Family Foundation. Dr. Norris, Dr. Strickland, and Dr. Snyder declared no relevant financial relationships.

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

TOPLINE:

The disease-modifying treatment (DMT) delays conversion to clinical multiple sclerosis (MS) for patients with radiologically isolated syndrome (RIS) and has a reassuring long-term safety profile, new research shows.

METHODOLOGY:

Early use of DMTs is typically recommended for patients with established MS, but mounting evidence, including the ARISE trial, which assessed Tecfidera, suggests these agents benefit patients with RIS, the earliest detectable preclinical MS stage.

The new study, known as Teriflunomide in Radiologically Isolated Syndrome (TERIS), included 89 adult patients with RIS (mean age, 37.8 years) from centers in France, Switzerland, and Turkey. Participants were randomly assigned to receive placebo or teriflunomide 14 mg daily. Teriflunomide is an oral immunomodulator approved for treating relapsing remitting MS.

Investigators performed MRI at baseline and at weeks 48, 96, and 144 and at any time during the study if warranted.

Researchers adjusted for potential confounders, including sex, age at RIS diagnosis, MS family history, brain T2-weighted hyperintense lesion volume, and presence of Gd+/− lesions.

The primary outcome was time to a first acute or progressive neurologic event resulting from central nervous system demyelination, expressed as a rate of conversion to clinical MS.
 

TAKEAWAY:

Eighteen participants – nine in each group – discontinued the study, resulting in a dropout rate of 20%.

The risk of a first clinical event was significantly reduced in the teriflunomide arm (mean time to event, 128.2 weeks) with 8 clinical events (6 acute, 2 progressive) in comparison with the placebo arm (mean time to event, 109.6 weeks) with 20 clinical events (18 acute, 2 progressive) and an adjusted hazard ratio of 0.28 (95% CI, 0.11-0.71; P = .007).

All secondary MRI measures, including the cumulative number of new and/or newly enlarging T2 lesions and the cumulative number of Gd+ lesions, did not reach statistical significance, although these were numerically lower in the teriflunomide arm, possibly because participants with early events switched to the treatment arm.

The most common adverse events that occurred more often in patients treated with teriflunomide were gastrointestinal disorders (11.4%), dysmenorrhea (9.1%), benign respiratory infections (6.8%), general disorders/conditions (6.8%), and transient increase of transaminases (4.5%).
 

IN PRACTICE:

“These results suggest that for the first time, we may have an opportunity to better identify those at risk for a primary progressive clinical course at this preclinical stage and prevent or delay clinical progression from the onset, which is a clear unmet need in MS clinical practice,” wrote the authors.

SOURCE:

The study was carried out by Christine Lebrun-Frénay MD, PhD, head of the inflammatory neurological disorders clinical research unit and MS center at the University of Nice (France). It was published online in JAMA Neurology.

LIMITATIONS:

The investigators could not stratify at-risk subgroups according to risk factors for developing MS, mainly because of power issues. The study was prematurely discontinued by its financial sponsor (Sanofi), owing primarily to slow enrollment that resulted from national regulations on activating recruitment sites and the impact of the COVID-19 pandemic. Another challenge for the study was that some individuals with RIS had already been exposed to a DMT or hesitated to participate in a clinical trial. The financial sponsor, which provided the study drug and placebo tablets, terminated their availability, given the anticipated release of generic teriflunomide.

DISCLOSURES:

The study was supported by Sanofi, the University Hospital of Nice, University Cote d’Azur, and the Radiologically Isolated Syndrome Consortium. Lebrun-Frénay has no relevant conflicts of interest.

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

TOPLINE:

The disease-modifying treatment (DMT) delays conversion to clinical multiple sclerosis (MS) for patients with radiologically isolated syndrome (RIS) and has a reassuring long-term safety profile, new research shows.

METHODOLOGY:

Early use of DMTs is typically recommended for patients with established MS, but mounting evidence, including the ARISE trial, which assessed Tecfidera, suggests these agents benefit patients with RIS, the earliest detectable preclinical MS stage.

The new study, known as Teriflunomide in Radiologically Isolated Syndrome (TERIS), included 89 adult patients with RIS (mean age, 37.8 years) from centers in France, Switzerland, and Turkey. Participants were randomly assigned to receive placebo or teriflunomide 14 mg daily. Teriflunomide is an oral immunomodulator approved for treating relapsing remitting MS.

Investigators performed MRI at baseline and at weeks 48, 96, and 144 and at any time during the study if warranted.

Researchers adjusted for potential confounders, including sex, age at RIS diagnosis, MS family history, brain T2-weighted hyperintense lesion volume, and presence of Gd+/− lesions.

The primary outcome was time to a first acute or progressive neurologic event resulting from central nervous system demyelination, expressed as a rate of conversion to clinical MS.
 

TAKEAWAY:

Eighteen participants – nine in each group – discontinued the study, resulting in a dropout rate of 20%.

The risk of a first clinical event was significantly reduced in the teriflunomide arm (mean time to event, 128.2 weeks) with 8 clinical events (6 acute, 2 progressive) in comparison with the placebo arm (mean time to event, 109.6 weeks) with 20 clinical events (18 acute, 2 progressive) and an adjusted hazard ratio of 0.28 (95% CI, 0.11-0.71; P = .007).

All secondary MRI measures, including the cumulative number of new and/or newly enlarging T2 lesions and the cumulative number of Gd+ lesions, did not reach statistical significance, although these were numerically lower in the teriflunomide arm, possibly because participants with early events switched to the treatment arm.

The most common adverse events that occurred more often in patients treated with teriflunomide were gastrointestinal disorders (11.4%), dysmenorrhea (9.1%), benign respiratory infections (6.8%), general disorders/conditions (6.8%), and transient increase of transaminases (4.5%).
 

IN PRACTICE:

“These results suggest that for the first time, we may have an opportunity to better identify those at risk for a primary progressive clinical course at this preclinical stage and prevent or delay clinical progression from the onset, which is a clear unmet need in MS clinical practice,” wrote the authors.

SOURCE:

The study was carried out by Christine Lebrun-Frénay MD, PhD, head of the inflammatory neurological disorders clinical research unit and MS center at the University of Nice (France). It was published online in JAMA Neurology.

LIMITATIONS:

The investigators could not stratify at-risk subgroups according to risk factors for developing MS, mainly because of power issues. The study was prematurely discontinued by its financial sponsor (Sanofi), owing primarily to slow enrollment that resulted from national regulations on activating recruitment sites and the impact of the COVID-19 pandemic. Another challenge for the study was that some individuals with RIS had already been exposed to a DMT or hesitated to participate in a clinical trial. The financial sponsor, which provided the study drug and placebo tablets, terminated their availability, given the anticipated release of generic teriflunomide.

DISCLOSURES:

The study was supported by Sanofi, the University Hospital of Nice, University Cote d’Azur, and the Radiologically Isolated Syndrome Consortium. Lebrun-Frénay has no relevant conflicts of interest.

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

TOPLINE:

The disease-modifying treatment (DMT) delays conversion to clinical multiple sclerosis (MS) for patients with radiologically isolated syndrome (RIS) and has a reassuring long-term safety profile, new research shows.

METHODOLOGY:

Early use of DMTs is typically recommended for patients with established MS, but mounting evidence, including the ARISE trial, which assessed Tecfidera, suggests these agents benefit patients with RIS, the earliest detectable preclinical MS stage.

The new study, known as Teriflunomide in Radiologically Isolated Syndrome (TERIS), included 89 adult patients with RIS (mean age, 37.8 years) from centers in France, Switzerland, and Turkey. Participants were randomly assigned to receive placebo or teriflunomide 14 mg daily. Teriflunomide is an oral immunomodulator approved for treating relapsing remitting MS.

Investigators performed MRI at baseline and at weeks 48, 96, and 144 and at any time during the study if warranted.

Researchers adjusted for potential confounders, including sex, age at RIS diagnosis, MS family history, brain T2-weighted hyperintense lesion volume, and presence of Gd+/− lesions.

The primary outcome was time to a first acute or progressive neurologic event resulting from central nervous system demyelination, expressed as a rate of conversion to clinical MS.
 

TAKEAWAY:

Eighteen participants – nine in each group – discontinued the study, resulting in a dropout rate of 20%.

The risk of a first clinical event was significantly reduced in the teriflunomide arm (mean time to event, 128.2 weeks) with 8 clinical events (6 acute, 2 progressive) in comparison with the placebo arm (mean time to event, 109.6 weeks) with 20 clinical events (18 acute, 2 progressive) and an adjusted hazard ratio of 0.28 (95% CI, 0.11-0.71; P = .007).

All secondary MRI measures, including the cumulative number of new and/or newly enlarging T2 lesions and the cumulative number of Gd+ lesions, did not reach statistical significance, although these were numerically lower in the teriflunomide arm, possibly because participants with early events switched to the treatment arm.

The most common adverse events that occurred more often in patients treated with teriflunomide were gastrointestinal disorders (11.4%), dysmenorrhea (9.1%), benign respiratory infections (6.8%), general disorders/conditions (6.8%), and transient increase of transaminases (4.5%).
 

IN PRACTICE:

“These results suggest that for the first time, we may have an opportunity to better identify those at risk for a primary progressive clinical course at this preclinical stage and prevent or delay clinical progression from the onset, which is a clear unmet need in MS clinical practice,” wrote the authors.

SOURCE:

The study was carried out by Christine Lebrun-Frénay MD, PhD, head of the inflammatory neurological disorders clinical research unit and MS center at the University of Nice (France). It was published online in JAMA Neurology.

LIMITATIONS:

The investigators could not stratify at-risk subgroups according to risk factors for developing MS, mainly because of power issues. The study was prematurely discontinued by its financial sponsor (Sanofi), owing primarily to slow enrollment that resulted from national regulations on activating recruitment sites and the impact of the COVID-19 pandemic. Another challenge for the study was that some individuals with RIS had already been exposed to a DMT or hesitated to participate in a clinical trial. The financial sponsor, which provided the study drug and placebo tablets, terminated their availability, given the anticipated release of generic teriflunomide.

DISCLOSURES:

The study was supported by Sanofi, the University Hospital of Nice, University Cote d’Azur, and the Radiologically Isolated Syndrome Consortium. Lebrun-Frénay has no relevant conflicts of interest.

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