Study 1 Overview (Menon et al)

Objective: To determine whether a 0.25 mg/kg dose of intravenous tenecteplase is noninferior to intravenous alteplase 0.9 mg/kg for patients with acute ischemic stroke eligible for thrombolytic therapy.

Design: Multicenter, parallel-group, open-label randomized controlled trial.

Setting and participants: The trial was conducted at 22 primary and comprehensive stroke centers across Canada. A primary stroke center was defined as a hospital capable of offering intravenous thrombolysis to patients with acute ischemic stroke, while a comprehensive stroke center was able to offer thrombectomy services in addition. The involved centers also participated in Canadian quality improvement registries (either Quality Improvement and Clinical Research [QuiCR] or Optimizing Patient Treatment in Major Ischemic Stroke with EVT [OPTIMISE]) that track patient outcomes. Patients were eligible for inclusion if they were aged 18 years or older, had a diagnosis of acute ischemic stroke, presented within 4.5 hours of symptom onset, and were eligible for thrombolysis according to Canadian guidelines.

Patients were randomized in a 1:1 fashion to either intravenous tenecteplase (0.25 mg/kg single dose, maximum of 25 mg) or intravenous alteplase (0.9 mg/kg total dose to a maximum of 90 mg, delivered as a bolus followed by a continuous infusion). A total of 1600 patients were enrolled, with 816 randomly assigned to the tenecteplase arm and 784 to the alteplase arm; 1577 patients were included in the intention-to-treat (ITT) analysis (n = 806 tenecteplase; n = 771 alteplase). The median age of enrollees was 74 years, and 52.1% of the ITT population were men.

Main outcome measures: In the ITT population, the primary outcome measure was a modified Rankin score (mRS) of 0 or 1 at 90 to 120 days post treatment. Safety outcomes included symptomatic intracerebral hemorrhage, orolingual angioedema, extracranial bleeding that required blood transfusion (all within 24 hours of thrombolytic administration), and all-cause mortality at 90 days. The noninferiority threshold for intravenous tenecteplase was set as the lower 95% CI of the difference between the tenecteplase and alteplase groups in the proportion of patients who met the primary outcome exceeding –5%.

Main results: The primary outcome of mRS of either 0 or 1 at 90 to 120 days of treatment occurred in 296 (36.9%) of the 802 patients assigned to tenecteplase and 266 (34.8%) of the 765 patients assigned to alteplase (unadjusted risk difference, 2.1%; 95% CI, –2.6 to 6.9). The prespecified noninferiority threshold was met. There were no significant differences between the groups in rates of intracerebral hemorrhage at 24 hours or 90-day all-cause mortality.

Conclusion: Intravenous tenecteplase is a reasonable alternative to alteplase for patients eligible for thrombolytic therapy.

Study 2 Overview (Wang et al)

Objective: To determine whether tenecteplase (dose 0.25 mg/kg) is noninferior to alteplase in patients with acute ischemic stroke who are within 4.5 hours of symptom onset and eligible for thrombolytic therapy but either refused or were ineligible for endovascular thrombectomy.

Design: Multicenter, prospective, open-label, randomized, controlled noninferiority trial.

Setting and participants: This trial was conducted at 53 centers across China and included patients 18 years of age or older who were within 4.5 hours of symptom onset and were thrombolytic eligible, had a mRS ≤ 1 at enrollment, and had a National Institutes of Health Stroke Scale score between 5 and 25. Eligible participants were randomized 1:1 to either tenecteplase 0.25 mg/kg (maximum dose 25 mg) or alteplase 0.9 mg/kg (maximum dose 90 mg, administered as a bolus followed by infusion). During the enrollment period (June 12, 2021, to May 29, 2022), a total of 1430 participants were enrolled, and, of those, 716 were randomly assigned to tenecteplase and 714 to alteplase. Six patients assigned to tenecteplase and 7 assigned to alteplase did not receive drugs. At 90 days, 5 in the tenecteplase group and 11 in the alteplase group were lost to follow up.

Main outcome measures: The primary efficacy outcome was a mRS of 0 or 1 at 90 days. The primary safety outcome was intracranial hemorrhage within 36 hours. Safety outcomes included parenchymal hematoma 2, as defined by the European Cooperative Acute Stroke Study III; any intracranial or significant hemorrhage, as defined by the Global Utilization of Streptokinase and Tissue Plasminogen Activator for Occluded Coronary Arteries criteria; and death from all causes at 90 days. Noninferiority for tenecteplase would be declared if the lower 97.5% 1-sided CI for the relative risk (RR) for the primary outcome did not cross 0.937.

Main results: In the modified ITT population, the primary outcome occurred in 439 (62%) of the tenecteplase group and 405 (68%) of the alteplase group (RR, 1.07; 95% CI, 0.98-1.16). This met the prespecified margin for noninferiority. Intracranial hemorrhage within 36 hours was experienced by 15 (2%) patients in the tenecteplase group and 13 (2%) in the alteplase group (RR, 1.18; 95% CI, 0.56-2.50). Death at 90 days occurred in 46 (7%) patients in the tenecteplase group and 35 (5%) in the alteplase group (RR, 1.31; 95% CI, 0.86-2.01).

Conclusion: Tenecteplase was noninferior to alteplase in patients with acute ischemic stroke who met criteria for thrombolysis and either refused or were ineligible for endovascular thrombectomy.

Commentary

Alteplase has been FDA-approved for managing acute ischemic stroke since 1996 and has demonstrated positive effects on functional outcomes. Drawbacks of alteplase therapy, however, include bleeding risk as well as cumbersome administration of a bolus dose followed by a 60-minute infusion. In recent years, the question of whether or not tenecteplase could replace alteplase as the preferred thrombolytic for acute ischemic stroke has garnered much attention. Several features of tenecteplase make it an attractive option, including increased fibrin specificity, a longer half-life, and ease of administration as a single, rapid bolus dose. In phase 2 trials that compared tenecteplase 0.25 mg/kg with alteplase, findings suggested the potential for early neurological improvement as well as improved outcomes at 90 days. While the role of tenecteplase in acute myocardial infarction has been well established due to ease of use and a favorable adverse-effect profile,¹ there is much less evidence from phase 3 randomized controlled clinical trials to secure the role of tenecteplase in acute ischemic stroke.²

Menon et al attempted to close this gap in the literature by conducting a randomized controlled clinical trial (AcT) comparing tenecteplase to alteplase in a Canadian patient population. The trial's patient population mirrors that of real-world data from global registries in terms of age, sex, and baseline stroke severity. In addition, the eligibility window of 4.5 hours from symptom onset as well as the inclusion and exclusion criteria for therapy are common to those utilized in other countries, making the findings generalizable. There were some limitations to the study, however, including the impact of COVID-19 on recruitment efforts as well as limitations of research infrastructure and staffing, which may have limited enrollment efforts at primary stroke centers. Nonetheless, the authors concluded that their results provide evidence that tenecteplase is comparable to alteplase, with similar functional and safety outcomes.

TRACE-2 focused on an Asian patient population and provided follow up to the dose-ranging TRACE-1 phase 2 trial. TRACE-1 showed that tenecteplase 0.25 mg/kg had a similar safety profile to alteplase 0.9 mg/kg in Chinese patients presenting with acute ischemic stroke. TRACE-2 sought to establish noninferiority of tenecteplase and excluded patients who were ineligible for or refused thrombectomy. Interestingly, the tenecteplase arm, as the authors point out, had numerically greater mortality as well as intracranial hemorrhage, but these differences were not statistically significant between the treatment groups at 90 days. The TRACE-2 results parallel those of AcT, and although there were differences in ethnicity between the 2 trials, the authors cite this as evidence that the results are consistent and provide evidence for the role of tenecteplase in the management of acute ischemic stroke. Limitations of this trial include potential bias from its open-label design, as well as exclusion of patients with more severe strokes eligible for thrombectomy, which may limit generalizability to patients with more disabling strokes who could have a higher risk of intracranial hemorrhage.

Application for Clinical Practice and System Implementation

Across the country, many organizations have adopted the off-label use of tenecteplase for managing fibrinolytic-eligible acute ischemic stroke patients. In most cases, the impetus for change is the ease of dosing and administration of tenecteplase compared to alteplase, while the inclusion and exclusion criteria and overall management remain the same. Timely administration of therapy in stroke is critical. This, along with other time constraints in stroke workflows, the weight-based calculation of alteplase doses, and alteplase’s administration method may lead to medication errors when using this agent to treat patients with acute stroke. The rapid, single-dose administration of tenecteplase removes many barriers that hospitals face when patients may need to be treated and then transferred to another site for further care. Without the worry to “drip and ship,” the completion of administration may allow for timely patient transfer and eliminate the need for monitoring of an infusion during transfer. For some organizations, there may be a potential for drug cost-savings as well as improved metrics, such as door-to-needle time, but the overall effects of switching from alteplase to tenecteplase remain to be seen. Currently, tenecteplase is included in stroke guidelines as a “reasonable choice,” though with a low level of evidence.³ However, these 2 studies support the role of tenecteplase in acute ischemic stroke treatment and may provide a foundation for further studies to establish the role of tenecteplase in the acute ischemic stroke population.

Practice Points

• Tenecteplase may be considered as an alternative to alteplase for acute ischemic stroke for patients who meet eligibility criteria for thrombolytics; this recommendation is included in the most recent stroke guidelines, although tenecteplase has not been demonstrated to be superior to alteplase.
• The ease of administration of tenecteplase as a single intravenous bolus dose represents a benefit compared to alteplase; it is an off-label use, however, and further studies are needed to establish the superiority of tenecteplase in terms of functional and safety outcomes.

– Carol Heunisch, PharmD, BCPS, BCCP
Pharmacy Department, NorthShore–Edward-Elmhurst Health, Evanston, IL

Study 1 Overview (Menon et al)

Objective: To determine whether a 0.25 mg/kg dose of intravenous tenecteplase is noninferior to intravenous alteplase 0.9 mg/kg for patients with acute ischemic stroke eligible for thrombolytic therapy.

Design: Multicenter, parallel-group, open-label randomized controlled trial.

Setting and participants: The trial was conducted at 22 primary and comprehensive stroke centers across Canada. A primary stroke center was defined as a hospital capable of offering intravenous thrombolysis to patients with acute ischemic stroke, while a comprehensive stroke center was able to offer thrombectomy services in addition. The involved centers also participated in Canadian quality improvement registries (either Quality Improvement and Clinical Research [QuiCR] or Optimizing Patient Treatment in Major Ischemic Stroke with EVT [OPTIMISE]) that track patient outcomes. Patients were eligible for inclusion if they were aged 18 years or older, had a diagnosis of acute ischemic stroke, presented within 4.5 hours of symptom onset, and were eligible for thrombolysis according to Canadian guidelines.

Patients were randomized in a 1:1 fashion to either intravenous tenecteplase (0.25 mg/kg single dose, maximum of 25 mg) or intravenous alteplase (0.9 mg/kg total dose to a maximum of 90 mg, delivered as a bolus followed by a continuous infusion). A total of 1600 patients were enrolled, with 816 randomly assigned to the tenecteplase arm and 784 to the alteplase arm; 1577 patients were included in the intention-to-treat (ITT) analysis (n = 806 tenecteplase; n = 771 alteplase). The median age of enrollees was 74 years, and 52.1% of the ITT population were men.

Main outcome measures: In the ITT population, the primary outcome measure was a modified Rankin score (mRS) of 0 or 1 at 90 to 120 days post treatment. Safety outcomes included symptomatic intracerebral hemorrhage, orolingual angioedema, extracranial bleeding that required blood transfusion (all within 24 hours of thrombolytic administration), and all-cause mortality at 90 days. The noninferiority threshold for intravenous tenecteplase was set as the lower 95% CI of the difference between the tenecteplase and alteplase groups in the proportion of patients who met the primary outcome exceeding –5%.

Main results: The primary outcome of mRS of either 0 or 1 at 90 to 120 days of treatment occurred in 296 (36.9%) of the 802 patients assigned to tenecteplase and 266 (34.8%) of the 765 patients assigned to alteplase (unadjusted risk difference, 2.1%; 95% CI, –2.6 to 6.9). The prespecified noninferiority threshold was met. There were no significant differences between the groups in rates of intracerebral hemorrhage at 24 hours or 90-day all-cause mortality.

Conclusion: Intravenous tenecteplase is a reasonable alternative to alteplase for patients eligible for thrombolytic therapy.

Study 2 Overview (Wang et al)

Objective: To determine whether tenecteplase (dose 0.25 mg/kg) is noninferior to alteplase in patients with acute ischemic stroke who are within 4.5 hours of symptom onset and eligible for thrombolytic therapy but either refused or were ineligible for endovascular thrombectomy.

Design: Multicenter, prospective, open-label, randomized, controlled noninferiority trial.

Setting and participants: This trial was conducted at 53 centers across China and included patients 18 years of age or older who were within 4.5 hours of symptom onset and were thrombolytic eligible, had a mRS ≤ 1 at enrollment, and had a National Institutes of Health Stroke Scale score between 5 and 25. Eligible participants were randomized 1:1 to either tenecteplase 0.25 mg/kg (maximum dose 25 mg) or alteplase 0.9 mg/kg (maximum dose 90 mg, administered as a bolus followed by infusion). During the enrollment period (June 12, 2021, to May 29, 2022), a total of 1430 participants were enrolled, and, of those, 716 were randomly assigned to tenecteplase and 714 to alteplase. Six patients assigned to tenecteplase and 7 assigned to alteplase did not receive drugs. At 90 days, 5 in the tenecteplase group and 11 in the alteplase group were lost to follow up.

Main outcome measures: The primary efficacy outcome was a mRS of 0 or 1 at 90 days. The primary safety outcome was intracranial hemorrhage within 36 hours. Safety outcomes included parenchymal hematoma 2, as defined by the European Cooperative Acute Stroke Study III; any intracranial or significant hemorrhage, as defined by the Global Utilization of Streptokinase and Tissue Plasminogen Activator for Occluded Coronary Arteries criteria; and death from all causes at 90 days. Noninferiority for tenecteplase would be declared if the lower 97.5% 1-sided CI for the relative risk (RR) for the primary outcome did not cross 0.937.

Main results: In the modified ITT population, the primary outcome occurred in 439 (62%) of the tenecteplase group and 405 (68%) of the alteplase group (RR, 1.07; 95% CI, 0.98-1.16). This met the prespecified margin for noninferiority. Intracranial hemorrhage within 36 hours was experienced by 15 (2%) patients in the tenecteplase group and 13 (2%) in the alteplase group (RR, 1.18; 95% CI, 0.56-2.50). Death at 90 days occurred in 46 (7%) patients in the tenecteplase group and 35 (5%) in the alteplase group (RR, 1.31; 95% CI, 0.86-2.01).

Conclusion: Tenecteplase was noninferior to alteplase in patients with acute ischemic stroke who met criteria for thrombolysis and either refused or were ineligible for endovascular thrombectomy.

Commentary

Alteplase has been FDA-approved for managing acute ischemic stroke since 1996 and has demonstrated positive effects on functional outcomes. Drawbacks of alteplase therapy, however, include bleeding risk as well as cumbersome administration of a bolus dose followed by a 60-minute infusion. In recent years, the question of whether or not tenecteplase could replace alteplase as the preferred thrombolytic for acute ischemic stroke has garnered much attention. Several features of tenecteplase make it an attractive option, including increased fibrin specificity, a longer half-life, and ease of administration as a single, rapid bolus dose. In phase 2 trials that compared tenecteplase 0.25 mg/kg with alteplase, findings suggested the potential for early neurological improvement as well as improved outcomes at 90 days. While the role of tenecteplase in acute myocardial infarction has been well established due to ease of use and a favorable adverse-effect profile,¹ there is much less evidence from phase 3 randomized controlled clinical trials to secure the role of tenecteplase in acute ischemic stroke.²

Menon et al attempted to close this gap in the literature by conducting a randomized controlled clinical trial (AcT) comparing tenecteplase to alteplase in a Canadian patient population. The trial's patient population mirrors that of real-world data from global registries in terms of age, sex, and baseline stroke severity. In addition, the eligibility window of 4.5 hours from symptom onset as well as the inclusion and exclusion criteria for therapy are common to those utilized in other countries, making the findings generalizable. There were some limitations to the study, however, including the impact of COVID-19 on recruitment efforts as well as limitations of research infrastructure and staffing, which may have limited enrollment efforts at primary stroke centers. Nonetheless, the authors concluded that their results provide evidence that tenecteplase is comparable to alteplase, with similar functional and safety outcomes.

TRACE-2 focused on an Asian patient population and provided follow up to the dose-ranging TRACE-1 phase 2 trial. TRACE-1 showed that tenecteplase 0.25 mg/kg had a similar safety profile to alteplase 0.9 mg/kg in Chinese patients presenting with acute ischemic stroke. TRACE-2 sought to establish noninferiority of tenecteplase and excluded patients who were ineligible for or refused thrombectomy. Interestingly, the tenecteplase arm, as the authors point out, had numerically greater mortality as well as intracranial hemorrhage, but these differences were not statistically significant between the treatment groups at 90 days. The TRACE-2 results parallel those of AcT, and although there were differences in ethnicity between the 2 trials, the authors cite this as evidence that the results are consistent and provide evidence for the role of tenecteplase in the management of acute ischemic stroke. Limitations of this trial include potential bias from its open-label design, as well as exclusion of patients with more severe strokes eligible for thrombectomy, which may limit generalizability to patients with more disabling strokes who could have a higher risk of intracranial hemorrhage.

Application for Clinical Practice and System Implementation

Across the country, many organizations have adopted the off-label use of tenecteplase for managing fibrinolytic-eligible acute ischemic stroke patients. In most cases, the impetus for change is the ease of dosing and administration of tenecteplase compared to alteplase, while the inclusion and exclusion criteria and overall management remain the same. Timely administration of therapy in stroke is critical. This, along with other time constraints in stroke workflows, the weight-based calculation of alteplase doses, and alteplase’s administration method may lead to medication errors when using this agent to treat patients with acute stroke. The rapid, single-dose administration of tenecteplase removes many barriers that hospitals face when patients may need to be treated and then transferred to another site for further care. Without the worry to “drip and ship,” the completion of administration may allow for timely patient transfer and eliminate the need for monitoring of an infusion during transfer. For some organizations, there may be a potential for drug cost-savings as well as improved metrics, such as door-to-needle time, but the overall effects of switching from alteplase to tenecteplase remain to be seen. Currently, tenecteplase is included in stroke guidelines as a “reasonable choice,” though with a low level of evidence.³ However, these 2 studies support the role of tenecteplase in acute ischemic stroke treatment and may provide a foundation for further studies to establish the role of tenecteplase in the acute ischemic stroke population.

Practice Points

• Tenecteplase may be considered as an alternative to alteplase for acute ischemic stroke for patients who meet eligibility criteria for thrombolytics; this recommendation is included in the most recent stroke guidelines, although tenecteplase has not been demonstrated to be superior to alteplase.
• The ease of administration of tenecteplase as a single intravenous bolus dose represents a benefit compared to alteplase; it is an off-label use, however, and further studies are needed to establish the superiority of tenecteplase in terms of functional and safety outcomes.

– Carol Heunisch, PharmD, BCPS, BCCP
Pharmacy Department, NorthShore–Edward-Elmhurst Health, Evanston, IL

Study 1 Overview (Menon et al)

Objective: To determine whether a 0.25 mg/kg dose of intravenous tenecteplase is noninferior to intravenous alteplase 0.9 mg/kg for patients with acute ischemic stroke eligible for thrombolytic therapy.

Design: Multicenter, parallel-group, open-label randomized controlled trial.

Setting and participants: The trial was conducted at 22 primary and comprehensive stroke centers across Canada. A primary stroke center was defined as a hospital capable of offering intravenous thrombolysis to patients with acute ischemic stroke, while a comprehensive stroke center was able to offer thrombectomy services in addition. The involved centers also participated in Canadian quality improvement registries (either Quality Improvement and Clinical Research [QuiCR] or Optimizing Patient Treatment in Major Ischemic Stroke with EVT [OPTIMISE]) that track patient outcomes. Patients were eligible for inclusion if they were aged 18 years or older, had a diagnosis of acute ischemic stroke, presented within 4.5 hours of symptom onset, and were eligible for thrombolysis according to Canadian guidelines.

Patients were randomized in a 1:1 fashion to either intravenous tenecteplase (0.25 mg/kg single dose, maximum of 25 mg) or intravenous alteplase (0.9 mg/kg total dose to a maximum of 90 mg, delivered as a bolus followed by a continuous infusion). A total of 1600 patients were enrolled, with 816 randomly assigned to the tenecteplase arm and 784 to the alteplase arm; 1577 patients were included in the intention-to-treat (ITT) analysis (n = 806 tenecteplase; n = 771 alteplase). The median age of enrollees was 74 years, and 52.1% of the ITT population were men.

Main outcome measures: In the ITT population, the primary outcome measure was a modified Rankin score (mRS) of 0 or 1 at 90 to 120 days post treatment. Safety outcomes included symptomatic intracerebral hemorrhage, orolingual angioedema, extracranial bleeding that required blood transfusion (all within 24 hours of thrombolytic administration), and all-cause mortality at 90 days. The noninferiority threshold for intravenous tenecteplase was set as the lower 95% CI of the difference between the tenecteplase and alteplase groups in the proportion of patients who met the primary outcome exceeding –5%.

Main results: The primary outcome of mRS of either 0 or 1 at 90 to 120 days of treatment occurred in 296 (36.9%) of the 802 patients assigned to tenecteplase and 266 (34.8%) of the 765 patients assigned to alteplase (unadjusted risk difference, 2.1%; 95% CI, –2.6 to 6.9). The prespecified noninferiority threshold was met. There were no significant differences between the groups in rates of intracerebral hemorrhage at 24 hours or 90-day all-cause mortality.

Conclusion: Intravenous tenecteplase is a reasonable alternative to alteplase for patients eligible for thrombolytic therapy.

Study 2 Overview (Wang et al)

Objective: To determine whether tenecteplase (dose 0.25 mg/kg) is noninferior to alteplase in patients with acute ischemic stroke who are within 4.5 hours of symptom onset and eligible for thrombolytic therapy but either refused or were ineligible for endovascular thrombectomy.

Design: Multicenter, prospective, open-label, randomized, controlled noninferiority trial.

Setting and participants: This trial was conducted at 53 centers across China and included patients 18 years of age or older who were within 4.5 hours of symptom onset and were thrombolytic eligible, had a mRS ≤ 1 at enrollment, and had a National Institutes of Health Stroke Scale score between 5 and 25. Eligible participants were randomized 1:1 to either tenecteplase 0.25 mg/kg (maximum dose 25 mg) or alteplase 0.9 mg/kg (maximum dose 90 mg, administered as a bolus followed by infusion). During the enrollment period (June 12, 2021, to May 29, 2022), a total of 1430 participants were enrolled, and, of those, 716 were randomly assigned to tenecteplase and 714 to alteplase. Six patients assigned to tenecteplase and 7 assigned to alteplase did not receive drugs. At 90 days, 5 in the tenecteplase group and 11 in the alteplase group were lost to follow up.

Main outcome measures: The primary efficacy outcome was a mRS of 0 or 1 at 90 days. The primary safety outcome was intracranial hemorrhage within 36 hours. Safety outcomes included parenchymal hematoma 2, as defined by the European Cooperative Acute Stroke Study III; any intracranial or significant hemorrhage, as defined by the Global Utilization of Streptokinase and Tissue Plasminogen Activator for Occluded Coronary Arteries criteria; and death from all causes at 90 days. Noninferiority for tenecteplase would be declared if the lower 97.5% 1-sided CI for the relative risk (RR) for the primary outcome did not cross 0.937.

Main results: In the modified ITT population, the primary outcome occurred in 439 (62%) of the tenecteplase group and 405 (68%) of the alteplase group (RR, 1.07; 95% CI, 0.98-1.16). This met the prespecified margin for noninferiority. Intracranial hemorrhage within 36 hours was experienced by 15 (2%) patients in the tenecteplase group and 13 (2%) in the alteplase group (RR, 1.18; 95% CI, 0.56-2.50). Death at 90 days occurred in 46 (7%) patients in the tenecteplase group and 35 (5%) in the alteplase group (RR, 1.31; 95% CI, 0.86-2.01).

Conclusion: Tenecteplase was noninferior to alteplase in patients with acute ischemic stroke who met criteria for thrombolysis and either refused or were ineligible for endovascular thrombectomy.

Commentary

Alteplase has been FDA-approved for managing acute ischemic stroke since 1996 and has demonstrated positive effects on functional outcomes. Drawbacks of alteplase therapy, however, include bleeding risk as well as cumbersome administration of a bolus dose followed by a 60-minute infusion. In recent years, the question of whether or not tenecteplase could replace alteplase as the preferred thrombolytic for acute ischemic stroke has garnered much attention. Several features of tenecteplase make it an attractive option, including increased fibrin specificity, a longer half-life, and ease of administration as a single, rapid bolus dose. In phase 2 trials that compared tenecteplase 0.25 mg/kg with alteplase, findings suggested the potential for early neurological improvement as well as improved outcomes at 90 days. While the role of tenecteplase in acute myocardial infarction has been well established due to ease of use and a favorable adverse-effect profile,¹ there is much less evidence from phase 3 randomized controlled clinical trials to secure the role of tenecteplase in acute ischemic stroke.²

Menon et al attempted to close this gap in the literature by conducting a randomized controlled clinical trial (AcT) comparing tenecteplase to alteplase in a Canadian patient population. The trial's patient population mirrors that of real-world data from global registries in terms of age, sex, and baseline stroke severity. In addition, the eligibility window of 4.5 hours from symptom onset as well as the inclusion and exclusion criteria for therapy are common to those utilized in other countries, making the findings generalizable. There were some limitations to the study, however, including the impact of COVID-19 on recruitment efforts as well as limitations of research infrastructure and staffing, which may have limited enrollment efforts at primary stroke centers. Nonetheless, the authors concluded that their results provide evidence that tenecteplase is comparable to alteplase, with similar functional and safety outcomes.

TRACE-2 focused on an Asian patient population and provided follow up to the dose-ranging TRACE-1 phase 2 trial. TRACE-1 showed that tenecteplase 0.25 mg/kg had a similar safety profile to alteplase 0.9 mg/kg in Chinese patients presenting with acute ischemic stroke. TRACE-2 sought to establish noninferiority of tenecteplase and excluded patients who were ineligible for or refused thrombectomy. Interestingly, the tenecteplase arm, as the authors point out, had numerically greater mortality as well as intracranial hemorrhage, but these differences were not statistically significant between the treatment groups at 90 days. The TRACE-2 results parallel those of AcT, and although there were differences in ethnicity between the 2 trials, the authors cite this as evidence that the results are consistent and provide evidence for the role of tenecteplase in the management of acute ischemic stroke. Limitations of this trial include potential bias from its open-label design, as well as exclusion of patients with more severe strokes eligible for thrombectomy, which may limit generalizability to patients with more disabling strokes who could have a higher risk of intracranial hemorrhage.

Application for Clinical Practice and System Implementation

Across the country, many organizations have adopted the off-label use of tenecteplase for managing fibrinolytic-eligible acute ischemic stroke patients. In most cases, the impetus for change is the ease of dosing and administration of tenecteplase compared to alteplase, while the inclusion and exclusion criteria and overall management remain the same. Timely administration of therapy in stroke is critical. This, along with other time constraints in stroke workflows, the weight-based calculation of alteplase doses, and alteplase’s administration method may lead to medication errors when using this agent to treat patients with acute stroke. The rapid, single-dose administration of tenecteplase removes many barriers that hospitals face when patients may need to be treated and then transferred to another site for further care. Without the worry to “drip and ship,” the completion of administration may allow for timely patient transfer and eliminate the need for monitoring of an infusion during transfer. For some organizations, there may be a potential for drug cost-savings as well as improved metrics, such as door-to-needle time, but the overall effects of switching from alteplase to tenecteplase remain to be seen. Currently, tenecteplase is included in stroke guidelines as a “reasonable choice,” though with a low level of evidence.³ However, these 2 studies support the role of tenecteplase in acute ischemic stroke treatment and may provide a foundation for further studies to establish the role of tenecteplase in the acute ischemic stroke population.

Practice Points

• Tenecteplase may be considered as an alternative to alteplase for acute ischemic stroke for patients who meet eligibility criteria for thrombolytics; this recommendation is included in the most recent stroke guidelines, although tenecteplase has not been demonstrated to be superior to alteplase.
• The ease of administration of tenecteplase as a single intravenous bolus dose represents a benefit compared to alteplase; it is an off-label use, however, and further studies are needed to establish the superiority of tenecteplase in terms of functional and safety outcomes.

– Carol Heunisch, PharmD, BCPS, BCCP
Pharmacy Department, NorthShore–Edward-Elmhurst Health, Evanston, IL

Even after endorsement in updated guidelines, hydroxyurea is substantially underused in youth with sickle cell anemia (SCA), new research indicates.

SCA can lead to pain crises, stroke, and early death. Hydroxyurea, an oral disease-modifying medication, can reduce the complications.

In 2014, the National Heart, Lung, and Blood Institute published revised guidelines that hydroxyurea should be offered as the primary therapy to all patients who were at least 9 months old and living with SCA, regardless of disease severity.
 

Low uptake even after guideline revision

Yet, a research team led by Sarah L. Reeves, PhD, MPH, with the Child Health Evaluation and Research Center at University of Michigan, Ann Arbor, found in their study of use in two sample states – Michigan and New York – that hydroxyurea use was low in children and adolescents enrolled in Medicaid and increased only slightly in Michigan and not at all in New York after the guideline revision.

After the guidelines were updated, the researchers observed that, on average, children and adolescents were getting the medication less than a third of the days in a year (32% maximum in the year with the highest uptake). The data were gathered from a study population that included 4,302 youths aged 1-17 years with SCA.

Findings were published online in JAMA Network Open.
 

‘A national issue’

Russell Ware, MD, PhD, chair of hematology translational research at Cincinnati Children’s Hospital, who was not part of the research, says that though data were gathered from Michigan and New York, “this is a national issue.”

Dr. Ware says the main problem is the way the health system describes the importance of hydroxyurea.

“There needs to be a realization that hydroxyurea is the standard of care for children with sickle cell anemia. It’s not just something they should take when they’re sick,” Dr. Ware said.

He added, “If you have diabetes, should you only take insulin if you’re really sick and hospitalized with a diabetic coma? Of course not.”

He said often providers aren’t giving a clear and consistent message to families.

“They’re not all sure they want to recommend it. They might offer it,” Dr. Ware said, which jeopardizes uptake. “Providers need to be more committed to it. They need to know how to dose it.”
 

Bad rap from past indications

Dr. Ware says hydroxyurea also gets a bad rap from use decades ago as a chemotherapeutic agent for cancer and then as an anti-HIV medication.

Now it’s used in a completely different way with SCA, but the fear of the association lingers.

“This label as a chemotherapeutic agent has really dogged hydroxyurea,” he said. “It’s a completely different mechanism. It’s a different dose. It’s a different purpose.”

The message to families should be more direct, he says: “Your child has sickle cell anemia and needs to be on disease-modifying therapy because this is a life-threatening disease.”

The underuse of this drug is particularly ironic, he says, as each capsule, taken daily, “costs about fifty cents.”
 

Medicaid support critical

Authors conclude that multifaceted interventions may be necessary to increase the number of filled prescriptions and use. They also point out that the interventions rely on states’ Medicaid support regarding hydroxyurea use. From 70% to 90% of young people with SCA are covered by Medicaid at some point, the researchers write.

“Variation may exist across states, as well as within states, in the coverage of hydroxyurea, outpatient visits, and associated lab monitoring,” they note.

The authors point to interventions in clinical trials that have had some success in hydroxyurea use.

Creary et al., for example, found that electronic directly observed therapy was associated with high adherence. That involved sending daily texts to patients to take hydroxyurea and patients recording and sending daily videos that show they took the medication.

The authors add that incorporating clinical pharmacists into the care team to provide education and support for families has been shown to be associated with successful outcomes for other chronic conditions – this approach may be particularly well suited to hydroxyurea given that this medication requires significant dosage monitoring.

Dr. Ware, however, says that solutions should focus on the health system more clearly communicating that hydroxyurea is the standard of care for all kids with SCA.

“We need to dispel these myths and these labels that are unfairly attributed to it. Then we’d probably do a lot better,” he said.

He added that children with SCA, “are a marginalized, neglected population of patients historically,” and addressing social determinants of health is also important in getting better uptake.

“Our pharmacy, for example, ships the drug to the families if they’re just getting a refill rather than making them drive all the way in,” Dr. Ware says.

Dr. Ware said given the interruption in doctor/patient relationships in the pandemic, the poor uptake of hydroxyurea could be even worse now.

The work was funded by the Agency for Healthcare Research and Quality and National Heart, Lung, and Blood Institute. Coauthor Dr. Green was the principal investigator of an NIH-funded trial of hydroxyurea in Uganda with a study drug provided by Siklos. No other author disclosures were reported. In addition to receiving research funding from the National Institutes of Health, Dr. Ware receives research donations from Bristol Myers Squibb, Addmedica, and Hemex Health. He is a medical adviser for Nova Laboratories and Octapharma, and serves on Data Safety Monitoring Boards for Novartis and Editas.
 

Even after endorsement in updated guidelines, hydroxyurea is substantially underused in youth with sickle cell anemia (SCA), new research indicates.

SCA can lead to pain crises, stroke, and early death. Hydroxyurea, an oral disease-modifying medication, can reduce the complications.

In 2014, the National Heart, Lung, and Blood Institute published revised guidelines that hydroxyurea should be offered as the primary therapy to all patients who were at least 9 months old and living with SCA, regardless of disease severity.
 

Low uptake even after guideline revision

Yet, a research team led by Sarah L. Reeves, PhD, MPH, with the Child Health Evaluation and Research Center at University of Michigan, Ann Arbor, found in their study of use in two sample states – Michigan and New York – that hydroxyurea use was low in children and adolescents enrolled in Medicaid and increased only slightly in Michigan and not at all in New York after the guideline revision.

After the guidelines were updated, the researchers observed that, on average, children and adolescents were getting the medication less than a third of the days in a year (32% maximum in the year with the highest uptake). The data were gathered from a study population that included 4,302 youths aged 1-17 years with SCA.

Findings were published online in JAMA Network Open.
 

‘A national issue’

Russell Ware, MD, PhD, chair of hematology translational research at Cincinnati Children’s Hospital, who was not part of the research, says that though data were gathered from Michigan and New York, “this is a national issue.”

Dr. Ware says the main problem is the way the health system describes the importance of hydroxyurea.

“There needs to be a realization that hydroxyurea is the standard of care for children with sickle cell anemia. It’s not just something they should take when they’re sick,” Dr. Ware said.

He added, “If you have diabetes, should you only take insulin if you’re really sick and hospitalized with a diabetic coma? Of course not.”

He said often providers aren’t giving a clear and consistent message to families.

“They’re not all sure they want to recommend it. They might offer it,” Dr. Ware said, which jeopardizes uptake. “Providers need to be more committed to it. They need to know how to dose it.”
 

Bad rap from past indications

Dr. Ware says hydroxyurea also gets a bad rap from use decades ago as a chemotherapeutic agent for cancer and then as an anti-HIV medication.

Now it’s used in a completely different way with SCA, but the fear of the association lingers.

“This label as a chemotherapeutic agent has really dogged hydroxyurea,” he said. “It’s a completely different mechanism. It’s a different dose. It’s a different purpose.”

The message to families should be more direct, he says: “Your child has sickle cell anemia and needs to be on disease-modifying therapy because this is a life-threatening disease.”

The underuse of this drug is particularly ironic, he says, as each capsule, taken daily, “costs about fifty cents.”
 

Medicaid support critical

Authors conclude that multifaceted interventions may be necessary to increase the number of filled prescriptions and use. They also point out that the interventions rely on states’ Medicaid support regarding hydroxyurea use. From 70% to 90% of young people with SCA are covered by Medicaid at some point, the researchers write.

“Variation may exist across states, as well as within states, in the coverage of hydroxyurea, outpatient visits, and associated lab monitoring,” they note.

The authors point to interventions in clinical trials that have had some success in hydroxyurea use.

Creary et al., for example, found that electronic directly observed therapy was associated with high adherence. That involved sending daily texts to patients to take hydroxyurea and patients recording and sending daily videos that show they took the medication.

The authors add that incorporating clinical pharmacists into the care team to provide education and support for families has been shown to be associated with successful outcomes for other chronic conditions – this approach may be particularly well suited to hydroxyurea given that this medication requires significant dosage monitoring.

Dr. Ware, however, says that solutions should focus on the health system more clearly communicating that hydroxyurea is the standard of care for all kids with SCA.

“We need to dispel these myths and these labels that are unfairly attributed to it. Then we’d probably do a lot better,” he said.

He added that children with SCA, “are a marginalized, neglected population of patients historically,” and addressing social determinants of health is also important in getting better uptake.

“Our pharmacy, for example, ships the drug to the families if they’re just getting a refill rather than making them drive all the way in,” Dr. Ware says.

Dr. Ware said given the interruption in doctor/patient relationships in the pandemic, the poor uptake of hydroxyurea could be even worse now.

The work was funded by the Agency for Healthcare Research and Quality and National Heart, Lung, and Blood Institute. Coauthor Dr. Green was the principal investigator of an NIH-funded trial of hydroxyurea in Uganda with a study drug provided by Siklos. No other author disclosures were reported. In addition to receiving research funding from the National Institutes of Health, Dr. Ware receives research donations from Bristol Myers Squibb, Addmedica, and Hemex Health. He is a medical adviser for Nova Laboratories and Octapharma, and serves on Data Safety Monitoring Boards for Novartis and Editas.
 

Even after endorsement in updated guidelines, hydroxyurea is substantially underused in youth with sickle cell anemia (SCA), new research indicates.

SCA can lead to pain crises, stroke, and early death. Hydroxyurea, an oral disease-modifying medication, can reduce the complications.

In 2014, the National Heart, Lung, and Blood Institute published revised guidelines that hydroxyurea should be offered as the primary therapy to all patients who were at least 9 months old and living with SCA, regardless of disease severity.
 

Low uptake even after guideline revision

Yet, a research team led by Sarah L. Reeves, PhD, MPH, with the Child Health Evaluation and Research Center at University of Michigan, Ann Arbor, found in their study of use in two sample states – Michigan and New York – that hydroxyurea use was low in children and adolescents enrolled in Medicaid and increased only slightly in Michigan and not at all in New York after the guideline revision.

After the guidelines were updated, the researchers observed that, on average, children and adolescents were getting the medication less than a third of the days in a year (32% maximum in the year with the highest uptake). The data were gathered from a study population that included 4,302 youths aged 1-17 years with SCA.

Findings were published online in JAMA Network Open.
 

‘A national issue’

Russell Ware, MD, PhD, chair of hematology translational research at Cincinnati Children’s Hospital, who was not part of the research, says that though data were gathered from Michigan and New York, “this is a national issue.”

Dr. Ware says the main problem is the way the health system describes the importance of hydroxyurea.

“There needs to be a realization that hydroxyurea is the standard of care for children with sickle cell anemia. It’s not just something they should take when they’re sick,” Dr. Ware said.

He added, “If you have diabetes, should you only take insulin if you’re really sick and hospitalized with a diabetic coma? Of course not.”

He said often providers aren’t giving a clear and consistent message to families.

“They’re not all sure they want to recommend it. They might offer it,” Dr. Ware said, which jeopardizes uptake. “Providers need to be more committed to it. They need to know how to dose it.”
 

Bad rap from past indications

Dr. Ware says hydroxyurea also gets a bad rap from use decades ago as a chemotherapeutic agent for cancer and then as an anti-HIV medication.

Now it’s used in a completely different way with SCA, but the fear of the association lingers.

“This label as a chemotherapeutic agent has really dogged hydroxyurea,” he said. “It’s a completely different mechanism. It’s a different dose. It’s a different purpose.”

The message to families should be more direct, he says: “Your child has sickle cell anemia and needs to be on disease-modifying therapy because this is a life-threatening disease.”

The underuse of this drug is particularly ironic, he says, as each capsule, taken daily, “costs about fifty cents.”
 

Medicaid support critical

Authors conclude that multifaceted interventions may be necessary to increase the number of filled prescriptions and use. They also point out that the interventions rely on states’ Medicaid support regarding hydroxyurea use. From 70% to 90% of young people with SCA are covered by Medicaid at some point, the researchers write.

“Variation may exist across states, as well as within states, in the coverage of hydroxyurea, outpatient visits, and associated lab monitoring,” they note.

The authors point to interventions in clinical trials that have had some success in hydroxyurea use.

Creary et al., for example, found that electronic directly observed therapy was associated with high adherence. That involved sending daily texts to patients to take hydroxyurea and patients recording and sending daily videos that show they took the medication.

The authors add that incorporating clinical pharmacists into the care team to provide education and support for families has been shown to be associated with successful outcomes for other chronic conditions – this approach may be particularly well suited to hydroxyurea given that this medication requires significant dosage monitoring.

Dr. Ware, however, says that solutions should focus on the health system more clearly communicating that hydroxyurea is the standard of care for all kids with SCA.

“We need to dispel these myths and these labels that are unfairly attributed to it. Then we’d probably do a lot better,” he said.

He added that children with SCA, “are a marginalized, neglected population of patients historically,” and addressing social determinants of health is also important in getting better uptake.

“Our pharmacy, for example, ships the drug to the families if they’re just getting a refill rather than making them drive all the way in,” Dr. Ware says.

Dr. Ware said given the interruption in doctor/patient relationships in the pandemic, the poor uptake of hydroxyurea could be even worse now.

The work was funded by the Agency for Healthcare Research and Quality and National Heart, Lung, and Blood Institute. Coauthor Dr. Green was the principal investigator of an NIH-funded trial of hydroxyurea in Uganda with a study drug provided by Siklos. No other author disclosures were reported. In addition to receiving research funding from the National Institutes of Health, Dr. Ware receives research donations from Bristol Myers Squibb, Addmedica, and Hemex Health. He is a medical adviser for Nova Laboratories and Octapharma, and serves on Data Safety Monitoring Boards for Novartis and Editas.
 

What is your outlook on the role of upfront autologous stem cell transplant (ASCT) for patients with mantle cell lymphoma (MCL)?

Dr. Barrientos: Most of the data that we have for upfront ASCT for young patients in frontline therapy come from the era when we did not use rituximab, and the data have not kept up with the pace of all the recent advances. Rituximab has changed the way we approach maintenance therapy after induction therapy. No randomized controlled trial data (in regimens that incorporate rituximab and cytarabine) have demonstrated a benefit in overall survival (OS) with ASCT in the modern era.

There is a lot to consider for every patient with MCL before we start therapy or discuss upfront transplant. MCL is one of these non-Hodgkin lymphomas that unfortunately can be aggressive in some patients depending on their prognostic markers and particular clinical features of the disease. Some patients have a more indolent form, whereas others have a more aggressive presentation at the time of diagnosis. The disease is heterogeneous and will respond differently to certain regimens. For example, patients with MCL who have a high proliferation rate, blastoid morphology, multiple chromosomal aberrations, complex karyotype, and/or the presence of tumor suppressor protein P53 (TP53) mutation will likely have a more aggressive course. Fitness for transplant is also an important consideration regardless of age; that is, a patient with comorbid end-stage chronic kidney or liver disease will not be able to tolerate a transplant.

Even with optimal therapy that incorporates rituximab and cytarabine, pursuing a transplant does not necessarily benefit survival in patients with a known TP53 mutation, as these patients typically experience increased toxicity without improved OS. We know they will not respond well, and we should discuss the available data so that the patients can make a sound decision and consider participation in a clinical trial that incorporates novel agents. Another type of mutation—cyclin-dependent kinase inhibitor 2A (CDKN2A)—also has lower OS. Concurrent deletion of CDKN2A and TP53 aberration (deletion and/or mutation) are known to be associated with lower OS given their chemoresistant nature. Patients with these genetic mutations should not be offered standard ASCT, but rather they should be identified early on and prioritized to participate in clinical trials.

Importantly, the role of upfront ASCT is changing right now, based on a recent trial that was presented at the latest American Society of Hematology meeting in 2022. The TRIANGLE trial demonstrated the addition of ibrutinib (a first-generation Bruton tyrosine kinase [BTK] inhibitor) to standard chemoimmunotherapy induction and 2 years of ibrutinib maintenance can improve outcomes vs standard chemoimmunotherapy induction and ASCT alone for younger patients with MCL. However, longer follow-up is needed to fully elucidate the role of ASCT in the era of BTK inhibitors when incorporated early on into the treatment paradigm.

The TRIANGLE trial was an international, randomized 3-arm phase 3 trial (EudraCT-no. 2014-001363-12) for young (up to 65 years) fit patients with histologically confirmed, untreated, advanced stage II-IV MCL. In the control arm A, patients received an alternating R-CHOP/R-DHAP induction followed by myeloablative consolidation (ASCT). In arm A+I, ibrutinib was added to the R-CHOP cycles (560 mg day 1-19) and was applied as maintenance (continuous dosing) for 2 years. In arm I, the same induction and maintenance was applied but high-dose consolidation and ASCT was skipped. A rituximab maintenance (single doses every 2 months for up to 3 years) was allowed to be added in all study arms according to national clinical routine.

The study showed that failure-free survival at 3 years was 72% with chemotherapy alone, 86% with ibrutinib alone, and 88% with ibrutinib plus ASCT. However, the ibrutinib plus ASCT group seemed to have much more toxicity, comorbidities, and other complications from the transplant. The OS data are not mature yet, but looking at the available data, ibrutinib alone might be more beneficial to our patients— not only in terms of efficacy, but also in tolerability and response, with less toxicity over time.

To put things in perspective, we did not have good salvage therapies a decade ago. At the time ASCT was incorporated, it was a good option that allowed numerous patients to achieve a deep response with durable remission duration. Before ibrutinib was approved, the overall response rate for the best salvage therapies was not as encouraging as the initial therapy and, with each relapse, the duration of response shortened. When ibrutinib came along, the overall response rate improved significantly. But again, these patients had relapsed/refractory disease. Researchers have been investigating what would happen if we used such a drug in earlier lines of therapy. Can we get better outcomes? Can we get patients in remission longer, similar to what we have seen with ASCT, but without the ASCT?

There has never been a single modern trial that has demonstrated that transplant improves survival. Transplantation can improve progression-free survival, but not OS. For a disease for which we do not have a cure, if we can keep patients in remission with a good salvage therapy and give them a better quality of life, without subjecting them to an ASCT, then I might choose that. New targeted agents and novel therapies are in clinical development all the time, so the future is bright for patients with this diagnosis. Given the novel salvage therapies in the pipeline, we may be able to no longer recommend ASCT upfront for most patients soon.

Can you share more about the potential benefits of using salvage therapies over ASCT, and particularly any promising newer agents in the salvage therapy setting?

Dr. Barrientos: Recently we had the FDA approval of pirtobrutinib—a noncovalently bound BTK inhibitor—for patients with relapsed/refractory MCL in whom at least 2 lines of systemic therapy had failed, including another BTK inhibitor. In the trial that led to the accelerated approval, pirtobrutinib-treated patients showed an overall response rate of 50% in those who received the drug at 200 mg daily (n = 120); most of the responses were partial responses. The efficacy of other novel drugs are being studied in patients with MCL. For example, ROR1 (receptor tyrosine kinase–like orphan receptor 1) inhibitors and BTK degraders are currently in clinical trials. Chimeric antigen receptor (CAR) T-cell therapy targeting CD19 has been approved for the treatment of adult patients with relapsed or refractory MCL, and this may be an option for some patients.

Multiple novel agents might be able to salvage our patients without subjecting them to an upfront transplant. My hope is to get away from using the intense chemotherapy regimens that might cause myelosuppression, infection risk, or other toxicities, and try to stay with the novel agents. We need to do better for our patients.

Based on the data we now have, until there is a trial that demonstrates a higher OS rate with ASCT, it is hard for me to tell a patient to blindly pursue ASCT without learning more about all the available options. If you have access to a good salvage therapy, especially with all these new promising agents, a patient might be able to stay in remission without having ASCT, which can still have an increased risk of morbidity.

Are there certain patient groups that should never be considered for ASCT?

Dr. Barrientos: Younger patients with the CDKN2A gene—which represents about 22% of patients—and those who have a TP53 mutation should not be considered for a standard transplant because they have a worse outcome independent of the treatment. I would also include complex karyotype patients because of the same nature of the chromosomal aberrations. The more genetic aberrations that a patient has, the more likelihood that any chemotherapy will damage the DNA further and create a more aggressive clone. Instead, I would recommend that young patients in this category participate in a clinical trial with novel agents.

With novel therapies in the pipeline, the availability of CAR T, and now the bispecific antibodies such as blinatumomab and HexAbs coming along, the number of patients who may opt out of ASCT may increase. I have a long discussion with my patients. The more educated they are, the better it is for the patient. At the end of the day, the most important thing for me, with any therapy, is: how does the patient feel? Because if we cannot cure a patient or provide a survival advantage, I do not want to give that patient something that will decrease their quality of life. I would rather keep the patient in some sort of stable disease remission, comfortable, and having a good quality of life. That is my goal for anyone who cannot be cured. Now if it is a curable disease, like a diffuse large cell lymphoma or a Burkitt’s lymphoma, then it is a different story. But for people with MCL, a disease that you cannot cure, or chronic lymphocytic leukemia or follicular lymphoma, then it becomes a different discussion. Undetectable minimal residual disease correlates with longer remission durations, but sometimes trying to achieve that, you can actually do a lot of harm to some patients.

Are there any other conversations you have with your patients in day-to-day practice?

Dr. Barrientos: I always tell my patients to be on top of the age-appropriate cancer screening recommendations. For example, they should see a dermatologist once a year. Men should make sure that their prostate is checked. I recommend women get breast mammograms, Pap smears, and most importantly to avoid smoking—and that includes vaping. It is important to lead a healthy life to minimize the risk of secondary malignancies.

For risk of infections, I recommend to all my patients to be up to date on their vaccinations, such as pneumonia if they are older than 65, Shingrix for prevention of reactivation of varicella or chickenpox, and the flu shot once a year. I also recommend the COVID-19 vaccine even now, as our patients with blood disorders might have a harder time fighting COVID-19 infection. I always tell my patients to please reach out to us because we can discuss the use of antivirals such as Paxlovid (nirmatrelvir/ritonavir), and if they are sick, then they can get remdesivir in the hospital.

I want to touch on health literacy and disparities for a moment. I have some younger patients who are Latin or Black with uncontrolled hypertension or diabetes, even at a young age, and do not realize that I can treat their cancer into remission, but if their blood glucose is in the 500 range, they could die from their diabetes. So talking with patients about their overall health is important. Survivorship issues are important, especially if patients are diagnosed at a young age. We have known for a long time that chemotherapy can create cardiac events, arrhythmias, and heart disease. Therefore, I always tell patients with metabolic syndrome to try to exercise and eat healthy. Patients should get an electrocardiogram and see an internist at least once a year to make sure their cholesterol is well controlled. I think now we are being more cognizant that many complications can happen even 10 years after cancer treatment.

What is your outlook on the role of upfront autologous stem cell transplant (ASCT) for patients with mantle cell lymphoma (MCL)?

Dr. Barrientos: Most of the data that we have for upfront ASCT for young patients in frontline therapy come from the era when we did not use rituximab, and the data have not kept up with the pace of all the recent advances. Rituximab has changed the way we approach maintenance therapy after induction therapy. No randomized controlled trial data (in regimens that incorporate rituximab and cytarabine) have demonstrated a benefit in overall survival (OS) with ASCT in the modern era.

There is a lot to consider for every patient with MCL before we start therapy or discuss upfront transplant. MCL is one of these non-Hodgkin lymphomas that unfortunately can be aggressive in some patients depending on their prognostic markers and particular clinical features of the disease. Some patients have a more indolent form, whereas others have a more aggressive presentation at the time of diagnosis. The disease is heterogeneous and will respond differently to certain regimens. For example, patients with MCL who have a high proliferation rate, blastoid morphology, multiple chromosomal aberrations, complex karyotype, and/or the presence of tumor suppressor protein P53 (TP53) mutation will likely have a more aggressive course. Fitness for transplant is also an important consideration regardless of age; that is, a patient with comorbid end-stage chronic kidney or liver disease will not be able to tolerate a transplant.

Even with optimal therapy that incorporates rituximab and cytarabine, pursuing a transplant does not necessarily benefit survival in patients with a known TP53 mutation, as these patients typically experience increased toxicity without improved OS. We know they will not respond well, and we should discuss the available data so that the patients can make a sound decision and consider participation in a clinical trial that incorporates novel agents. Another type of mutation—cyclin-dependent kinase inhibitor 2A (CDKN2A)—also has lower OS. Concurrent deletion of CDKN2A and TP53 aberration (deletion and/or mutation) are known to be associated with lower OS given their chemoresistant nature. Patients with these genetic mutations should not be offered standard ASCT, but rather they should be identified early on and prioritized to participate in clinical trials.

Importantly, the role of upfront ASCT is changing right now, based on a recent trial that was presented at the latest American Society of Hematology meeting in 2022. The TRIANGLE trial demonstrated the addition of ibrutinib (a first-generation Bruton tyrosine kinase [BTK] inhibitor) to standard chemoimmunotherapy induction and 2 years of ibrutinib maintenance can improve outcomes vs standard chemoimmunotherapy induction and ASCT alone for younger patients with MCL. However, longer follow-up is needed to fully elucidate the role of ASCT in the era of BTK inhibitors when incorporated early on into the treatment paradigm.

The TRIANGLE trial was an international, randomized 3-arm phase 3 trial (EudraCT-no. 2014-001363-12) for young (up to 65 years) fit patients with histologically confirmed, untreated, advanced stage II-IV MCL. In the control arm A, patients received an alternating R-CHOP/R-DHAP induction followed by myeloablative consolidation (ASCT). In arm A+I, ibrutinib was added to the R-CHOP cycles (560 mg day 1-19) and was applied as maintenance (continuous dosing) for 2 years. In arm I, the same induction and maintenance was applied but high-dose consolidation and ASCT was skipped. A rituximab maintenance (single doses every 2 months for up to 3 years) was allowed to be added in all study arms according to national clinical routine.

The study showed that failure-free survival at 3 years was 72% with chemotherapy alone, 86% with ibrutinib alone, and 88% with ibrutinib plus ASCT. However, the ibrutinib plus ASCT group seemed to have much more toxicity, comorbidities, and other complications from the transplant. The OS data are not mature yet, but looking at the available data, ibrutinib alone might be more beneficial to our patients— not only in terms of efficacy, but also in tolerability and response, with less toxicity over time.

To put things in perspective, we did not have good salvage therapies a decade ago. At the time ASCT was incorporated, it was a good option that allowed numerous patients to achieve a deep response with durable remission duration. Before ibrutinib was approved, the overall response rate for the best salvage therapies was not as encouraging as the initial therapy and, with each relapse, the duration of response shortened. When ibrutinib came along, the overall response rate improved significantly. But again, these patients had relapsed/refractory disease. Researchers have been investigating what would happen if we used such a drug in earlier lines of therapy. Can we get better outcomes? Can we get patients in remission longer, similar to what we have seen with ASCT, but without the ASCT?

There has never been a single modern trial that has demonstrated that transplant improves survival. Transplantation can improve progression-free survival, but not OS. For a disease for which we do not have a cure, if we can keep patients in remission with a good salvage therapy and give them a better quality of life, without subjecting them to an ASCT, then I might choose that. New targeted agents and novel therapies are in clinical development all the time, so the future is bright for patients with this diagnosis. Given the novel salvage therapies in the pipeline, we may be able to no longer recommend ASCT upfront for most patients soon.

Can you share more about the potential benefits of using salvage therapies over ASCT, and particularly any promising newer agents in the salvage therapy setting?

Dr. Barrientos: Recently we had the FDA approval of pirtobrutinib—a noncovalently bound BTK inhibitor—for patients with relapsed/refractory MCL in whom at least 2 lines of systemic therapy had failed, including another BTK inhibitor. In the trial that led to the accelerated approval, pirtobrutinib-treated patients showed an overall response rate of 50% in those who received the drug at 200 mg daily (n = 120); most of the responses were partial responses. The efficacy of other novel drugs are being studied in patients with MCL. For example, ROR1 (receptor tyrosine kinase–like orphan receptor 1) inhibitors and BTK degraders are currently in clinical trials. Chimeric antigen receptor (CAR) T-cell therapy targeting CD19 has been approved for the treatment of adult patients with relapsed or refractory MCL, and this may be an option for some patients.

Multiple novel agents might be able to salvage our patients without subjecting them to an upfront transplant. My hope is to get away from using the intense chemotherapy regimens that might cause myelosuppression, infection risk, or other toxicities, and try to stay with the novel agents. We need to do better for our patients.

Based on the data we now have, until there is a trial that demonstrates a higher OS rate with ASCT, it is hard for me to tell a patient to blindly pursue ASCT without learning more about all the available options. If you have access to a good salvage therapy, especially with all these new promising agents, a patient might be able to stay in remission without having ASCT, which can still have an increased risk of morbidity.

Are there certain patient groups that should never be considered for ASCT?

Dr. Barrientos: Younger patients with the CDKN2A gene—which represents about 22% of patients—and those who have a TP53 mutation should not be considered for a standard transplant because they have a worse outcome independent of the treatment. I would also include complex karyotype patients because of the same nature of the chromosomal aberrations. The more genetic aberrations that a patient has, the more likelihood that any chemotherapy will damage the DNA further and create a more aggressive clone. Instead, I would recommend that young patients in this category participate in a clinical trial with novel agents.

With novel therapies in the pipeline, the availability of CAR T, and now the bispecific antibodies such as blinatumomab and HexAbs coming along, the number of patients who may opt out of ASCT may increase. I have a long discussion with my patients. The more educated they are, the better it is for the patient. At the end of the day, the most important thing for me, with any therapy, is: how does the patient feel? Because if we cannot cure a patient or provide a survival advantage, I do not want to give that patient something that will decrease their quality of life. I would rather keep the patient in some sort of stable disease remission, comfortable, and having a good quality of life. That is my goal for anyone who cannot be cured. Now if it is a curable disease, like a diffuse large cell lymphoma or a Burkitt’s lymphoma, then it is a different story. But for people with MCL, a disease that you cannot cure, or chronic lymphocytic leukemia or follicular lymphoma, then it becomes a different discussion. Undetectable minimal residual disease correlates with longer remission durations, but sometimes trying to achieve that, you can actually do a lot of harm to some patients.

Are there any other conversations you have with your patients in day-to-day practice?

Dr. Barrientos: I always tell my patients to be on top of the age-appropriate cancer screening recommendations. For example, they should see a dermatologist once a year. Men should make sure that their prostate is checked. I recommend women get breast mammograms, Pap smears, and most importantly to avoid smoking—and that includes vaping. It is important to lead a healthy life to minimize the risk of secondary malignancies.

For risk of infections, I recommend to all my patients to be up to date on their vaccinations, such as pneumonia if they are older than 65, Shingrix for prevention of reactivation of varicella or chickenpox, and the flu shot once a year. I also recommend the COVID-19 vaccine even now, as our patients with blood disorders might have a harder time fighting COVID-19 infection. I always tell my patients to please reach out to us because we can discuss the use of antivirals such as Paxlovid (nirmatrelvir/ritonavir), and if they are sick, then they can get remdesivir in the hospital.

I want to touch on health literacy and disparities for a moment. I have some younger patients who are Latin or Black with uncontrolled hypertension or diabetes, even at a young age, and do not realize that I can treat their cancer into remission, but if their blood glucose is in the 500 range, they could die from their diabetes. So talking with patients about their overall health is important. Survivorship issues are important, especially if patients are diagnosed at a young age. We have known for a long time that chemotherapy can create cardiac events, arrhythmias, and heart disease. Therefore, I always tell patients with metabolic syndrome to try to exercise and eat healthy. Patients should get an electrocardiogram and see an internist at least once a year to make sure their cholesterol is well controlled. I think now we are being more cognizant that many complications can happen even 10 years after cancer treatment.

What is your outlook on the role of upfront autologous stem cell transplant (ASCT) for patients with mantle cell lymphoma (MCL)?

Dr. Barrientos: Most of the data that we have for upfront ASCT for young patients in frontline therapy come from the era when we did not use rituximab, and the data have not kept up with the pace of all the recent advances. Rituximab has changed the way we approach maintenance therapy after induction therapy. No randomized controlled trial data (in regimens that incorporate rituximab and cytarabine) have demonstrated a benefit in overall survival (OS) with ASCT in the modern era.

There is a lot to consider for every patient with MCL before we start therapy or discuss upfront transplant. MCL is one of these non-Hodgkin lymphomas that unfortunately can be aggressive in some patients depending on their prognostic markers and particular clinical features of the disease. Some patients have a more indolent form, whereas others have a more aggressive presentation at the time of diagnosis. The disease is heterogeneous and will respond differently to certain regimens. For example, patients with MCL who have a high proliferation rate, blastoid morphology, multiple chromosomal aberrations, complex karyotype, and/or the presence of tumor suppressor protein P53 (TP53) mutation will likely have a more aggressive course. Fitness for transplant is also an important consideration regardless of age; that is, a patient with comorbid end-stage chronic kidney or liver disease will not be able to tolerate a transplant.

Even with optimal therapy that incorporates rituximab and cytarabine, pursuing a transplant does not necessarily benefit survival in patients with a known TP53 mutation, as these patients typically experience increased toxicity without improved OS. We know they will not respond well, and we should discuss the available data so that the patients can make a sound decision and consider participation in a clinical trial that incorporates novel agents. Another type of mutation—cyclin-dependent kinase inhibitor 2A (CDKN2A)—also has lower OS. Concurrent deletion of CDKN2A and TP53 aberration (deletion and/or mutation) are known to be associated with lower OS given their chemoresistant nature. Patients with these genetic mutations should not be offered standard ASCT, but rather they should be identified early on and prioritized to participate in clinical trials.

Importantly, the role of upfront ASCT is changing right now, based on a recent trial that was presented at the latest American Society of Hematology meeting in 2022. The TRIANGLE trial demonstrated the addition of ibrutinib (a first-generation Bruton tyrosine kinase [BTK] inhibitor) to standard chemoimmunotherapy induction and 2 years of ibrutinib maintenance can improve outcomes vs standard chemoimmunotherapy induction and ASCT alone for younger patients with MCL. However, longer follow-up is needed to fully elucidate the role of ASCT in the era of BTK inhibitors when incorporated early on into the treatment paradigm.

The TRIANGLE trial was an international, randomized 3-arm phase 3 trial (EudraCT-no. 2014-001363-12) for young (up to 65 years) fit patients with histologically confirmed, untreated, advanced stage II-IV MCL. In the control arm A, patients received an alternating R-CHOP/R-DHAP induction followed by myeloablative consolidation (ASCT). In arm A+I, ibrutinib was added to the R-CHOP cycles (560 mg day 1-19) and was applied as maintenance (continuous dosing) for 2 years. In arm I, the same induction and maintenance was applied but high-dose consolidation and ASCT was skipped. A rituximab maintenance (single doses every 2 months for up to 3 years) was allowed to be added in all study arms according to national clinical routine.

The study showed that failure-free survival at 3 years was 72% with chemotherapy alone, 86% with ibrutinib alone, and 88% with ibrutinib plus ASCT. However, the ibrutinib plus ASCT group seemed to have much more toxicity, comorbidities, and other complications from the transplant. The OS data are not mature yet, but looking at the available data, ibrutinib alone might be more beneficial to our patients— not only in terms of efficacy, but also in tolerability and response, with less toxicity over time.

To put things in perspective, we did not have good salvage therapies a decade ago. At the time ASCT was incorporated, it was a good option that allowed numerous patients to achieve a deep response with durable remission duration. Before ibrutinib was approved, the overall response rate for the best salvage therapies was not as encouraging as the initial therapy and, with each relapse, the duration of response shortened. When ibrutinib came along, the overall response rate improved significantly. But again, these patients had relapsed/refractory disease. Researchers have been investigating what would happen if we used such a drug in earlier lines of therapy. Can we get better outcomes? Can we get patients in remission longer, similar to what we have seen with ASCT, but without the ASCT?

There has never been a single modern trial that has demonstrated that transplant improves survival. Transplantation can improve progression-free survival, but not OS. For a disease for which we do not have a cure, if we can keep patients in remission with a good salvage therapy and give them a better quality of life, without subjecting them to an ASCT, then I might choose that. New targeted agents and novel therapies are in clinical development all the time, so the future is bright for patients with this diagnosis. Given the novel salvage therapies in the pipeline, we may be able to no longer recommend ASCT upfront for most patients soon.

Can you share more about the potential benefits of using salvage therapies over ASCT, and particularly any promising newer agents in the salvage therapy setting?

Dr. Barrientos: Recently we had the FDA approval of pirtobrutinib—a noncovalently bound BTK inhibitor—for patients with relapsed/refractory MCL in whom at least 2 lines of systemic therapy had failed, including another BTK inhibitor. In the trial that led to the accelerated approval, pirtobrutinib-treated patients showed an overall response rate of 50% in those who received the drug at 200 mg daily (n = 120); most of the responses were partial responses. The efficacy of other novel drugs are being studied in patients with MCL. For example, ROR1 (receptor tyrosine kinase–like orphan receptor 1) inhibitors and BTK degraders are currently in clinical trials. Chimeric antigen receptor (CAR) T-cell therapy targeting CD19 has been approved for the treatment of adult patients with relapsed or refractory MCL, and this may be an option for some patients.

Multiple novel agents might be able to salvage our patients without subjecting them to an upfront transplant. My hope is to get away from using the intense chemotherapy regimens that might cause myelosuppression, infection risk, or other toxicities, and try to stay with the novel agents. We need to do better for our patients.

Based on the data we now have, until there is a trial that demonstrates a higher OS rate with ASCT, it is hard for me to tell a patient to blindly pursue ASCT without learning more about all the available options. If you have access to a good salvage therapy, especially with all these new promising agents, a patient might be able to stay in remission without having ASCT, which can still have an increased risk of morbidity.

Are there certain patient groups that should never be considered for ASCT?

Dr. Barrientos: Younger patients with the CDKN2A gene—which represents about 22% of patients—and those who have a TP53 mutation should not be considered for a standard transplant because they have a worse outcome independent of the treatment. I would also include complex karyotype patients because of the same nature of the chromosomal aberrations. The more genetic aberrations that a patient has, the more likelihood that any chemotherapy will damage the DNA further and create a more aggressive clone. Instead, I would recommend that young patients in this category participate in a clinical trial with novel agents.

With novel therapies in the pipeline, the availability of CAR T, and now the bispecific antibodies such as blinatumomab and HexAbs coming along, the number of patients who may opt out of ASCT may increase. I have a long discussion with my patients. The more educated they are, the better it is for the patient. At the end of the day, the most important thing for me, with any therapy, is: how does the patient feel? Because if we cannot cure a patient or provide a survival advantage, I do not want to give that patient something that will decrease their quality of life. I would rather keep the patient in some sort of stable disease remission, comfortable, and having a good quality of life. That is my goal for anyone who cannot be cured. Now if it is a curable disease, like a diffuse large cell lymphoma or a Burkitt’s lymphoma, then it is a different story. But for people with MCL, a disease that you cannot cure, or chronic lymphocytic leukemia or follicular lymphoma, then it becomes a different discussion. Undetectable minimal residual disease correlates with longer remission durations, but sometimes trying to achieve that, you can actually do a lot of harm to some patients.

Are there any other conversations you have with your patients in day-to-day practice?

Dr. Barrientos: I always tell my patients to be on top of the age-appropriate cancer screening recommendations. For example, they should see a dermatologist once a year. Men should make sure that their prostate is checked. I recommend women get breast mammograms, Pap smears, and most importantly to avoid smoking—and that includes vaping. It is important to lead a healthy life to minimize the risk of secondary malignancies.

For risk of infections, I recommend to all my patients to be up to date on their vaccinations, such as pneumonia if they are older than 65, Shingrix for prevention of reactivation of varicella or chickenpox, and the flu shot once a year. I also recommend the COVID-19 vaccine even now, as our patients with blood disorders might have a harder time fighting COVID-19 infection. I always tell my patients to please reach out to us because we can discuss the use of antivirals such as Paxlovid (nirmatrelvir/ritonavir), and if they are sick, then they can get remdesivir in the hospital.

I want to touch on health literacy and disparities for a moment. I have some younger patients who are Latin or Black with uncontrolled hypertension or diabetes, even at a young age, and do not realize that I can treat their cancer into remission, but if their blood glucose is in the 500 range, they could die from their diabetes. So talking with patients about their overall health is important. Survivorship issues are important, especially if patients are diagnosed at a young age. We have known for a long time that chemotherapy can create cardiac events, arrhythmias, and heart disease. Therefore, I always tell patients with metabolic syndrome to try to exercise and eat healthy. Patients should get an electrocardiogram and see an internist at least once a year to make sure their cholesterol is well controlled. I think now we are being more cognizant that many complications can happen even 10 years after cancer treatment.

Key clinical point: The risk for a second primary malignancy (SPM) was higher in patients with indolent B‐cell lymphoma (iBCL) treated with bendamustine/rituximab (BR) vs rituximab monotherapy and rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (RCHOP) or rituximab, cyclophosphamide, vincristine, and prednisone (RCVP) or rituximab, pirarubicin, cyclophosphamide, vincristine, and prednisolone (RTHPCOP).

Major finding: The cumulative incidence of SPM was significantly higher among patients receiving BR vs rituximab monotherapy (P < .01) or RCHOP/RCVP/RTHPCOP (P < .0001). The 5‐year cumulative incidence rates with BR, rituximab monotherapy, and RCHOP/RCVP/RTHPCOP were 18.1%, 12.5%, and 12.9%, respectively.

Study details: This retrospective observational study included 5234 adult patients with iBCL who received rituximab monotherapy (n = 780), RCHOP/RCVP/RTHPCOP (n = 2298), or BR (n = 2156).

Disclosures: This study was supported by the Japan Society for the Promotion of Science. Y Muraki declared receiving a lecture honorarium from Pfizer Japan, Inc.

Source: Dote S et al. Risk of a second cancer and infection in patients with indolent B-cell lymphoma exposed to first-line bendamustine plus rituximab: A retrospective analysis of an administrative claims database. Hematol Oncol. 2023 (Feb 15). Doi: 10.1002/hon.3128.

Key clinical point: The risk for a second primary malignancy (SPM) was higher in patients with indolent B‐cell lymphoma (iBCL) treated with bendamustine/rituximab (BR) vs rituximab monotherapy and rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (RCHOP) or rituximab, cyclophosphamide, vincristine, and prednisone (RCVP) or rituximab, pirarubicin, cyclophosphamide, vincristine, and prednisolone (RTHPCOP).

Major finding: The cumulative incidence of SPM was significantly higher among patients receiving BR vs rituximab monotherapy (P < .01) or RCHOP/RCVP/RTHPCOP (P < .0001). The 5‐year cumulative incidence rates with BR, rituximab monotherapy, and RCHOP/RCVP/RTHPCOP were 18.1%, 12.5%, and 12.9%, respectively.

Study details: This retrospective observational study included 5234 adult patients with iBCL who received rituximab monotherapy (n = 780), RCHOP/RCVP/RTHPCOP (n = 2298), or BR (n = 2156).

Disclosures: This study was supported by the Japan Society for the Promotion of Science. Y Muraki declared receiving a lecture honorarium from Pfizer Japan, Inc.

Source: Dote S et al. Risk of a second cancer and infection in patients with indolent B-cell lymphoma exposed to first-line bendamustine plus rituximab: A retrospective analysis of an administrative claims database. Hematol Oncol. 2023 (Feb 15). Doi: 10.1002/hon.3128.

Key clinical point: The risk for a second primary malignancy (SPM) was higher in patients with indolent B‐cell lymphoma (iBCL) treated with bendamustine/rituximab (BR) vs rituximab monotherapy and rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (RCHOP) or rituximab, cyclophosphamide, vincristine, and prednisone (RCVP) or rituximab, pirarubicin, cyclophosphamide, vincristine, and prednisolone (RTHPCOP).

Major finding: The cumulative incidence of SPM was significantly higher among patients receiving BR vs rituximab monotherapy (P < .01) or RCHOP/RCVP/RTHPCOP (P < .0001). The 5‐year cumulative incidence rates with BR, rituximab monotherapy, and RCHOP/RCVP/RTHPCOP were 18.1%, 12.5%, and 12.9%, respectively.

Study details: This retrospective observational study included 5234 adult patients with iBCL who received rituximab monotherapy (n = 780), RCHOP/RCVP/RTHPCOP (n = 2298), or BR (n = 2156).

Disclosures: This study was supported by the Japan Society for the Promotion of Science. Y Muraki declared receiving a lecture honorarium from Pfizer Japan, Inc.

Source: Dote S et al. Risk of a second cancer and infection in patients with indolent B-cell lymphoma exposed to first-line bendamustine plus rituximab: A retrospective analysis of an administrative claims database. Hematol Oncol. 2023 (Feb 15). Doi: 10.1002/hon.3128.

Key clinical point: Multimodal treatment comprising total body irradiation (TBI), high-dose chemotherapy, and autologous stem cell transplantation (autoSCT) offers long-term survival in patients with mantle cell lymphoma (MCL).

Major finding: The median overall survival of patients who underwent TBI and autoSCT was 11.4 years, whereas that of patients who underwent TBI and allogenic stem cell transplantation (alloSCT) was 3.25 years. Compared with the whole cohort, patients receiving autoSCT presented a better overall survival rate (50.0% vs 57.9%) after reaching a plateau at 6.8 years.

Study details: Findings are from a single-center retrospective study including 22 patients with advanced MCL who underwent TBI before autoSCT (n = 19) or alloSCT (n = 3).

Disclosures: This study received no external funding. The authors declared no conflict on interests.

Source: Kröger K et al. Long-term survival of patients with mantle cell lymphoma after total body irradiation, high-dose chemotherapy and stem cell transplantation: A monocenter study. Cancers (Basel). 2023;15(3):983 (Feb 3). Doi: 10.3390/cancers15030983

Key clinical point: Multimodal treatment comprising total body irradiation (TBI), high-dose chemotherapy, and autologous stem cell transplantation (autoSCT) offers long-term survival in patients with mantle cell lymphoma (MCL).

Major finding: The median overall survival of patients who underwent TBI and autoSCT was 11.4 years, whereas that of patients who underwent TBI and allogenic stem cell transplantation (alloSCT) was 3.25 years. Compared with the whole cohort, patients receiving autoSCT presented a better overall survival rate (50.0% vs 57.9%) after reaching a plateau at 6.8 years.

Study details: Findings are from a single-center retrospective study including 22 patients with advanced MCL who underwent TBI before autoSCT (n = 19) or alloSCT (n = 3).

Disclosures: This study received no external funding. The authors declared no conflict on interests.

Source: Kröger K et al. Long-term survival of patients with mantle cell lymphoma after total body irradiation, high-dose chemotherapy and stem cell transplantation: A monocenter study. Cancers (Basel). 2023;15(3):983 (Feb 3). Doi: 10.3390/cancers15030983

Key clinical point: Multimodal treatment comprising total body irradiation (TBI), high-dose chemotherapy, and autologous stem cell transplantation (autoSCT) offers long-term survival in patients with mantle cell lymphoma (MCL).

Major finding: The median overall survival of patients who underwent TBI and autoSCT was 11.4 years, whereas that of patients who underwent TBI and allogenic stem cell transplantation (alloSCT) was 3.25 years. Compared with the whole cohort, patients receiving autoSCT presented a better overall survival rate (50.0% vs 57.9%) after reaching a plateau at 6.8 years.

Study details: Findings are from a single-center retrospective study including 22 patients with advanced MCL who underwent TBI before autoSCT (n = 19) or alloSCT (n = 3).

Disclosures: This study received no external funding. The authors declared no conflict on interests.

Source: Kröger K et al. Long-term survival of patients with mantle cell lymphoma after total body irradiation, high-dose chemotherapy and stem cell transplantation: A monocenter study. Cancers (Basel). 2023;15(3):983 (Feb 3). Doi: 10.3390/cancers15030983

Key clinical point: Only the copresence of TP53 deletion (del17p) and mutations and not a single aberration has a negative prognostic impact in patients with chronic lymphocytic leukemia (CLL) receiving ibrutinib treatment.

Major finding: Only patients with concomitant TP53 mutations and del17p had significantly shorter overall survival (OS; P = .0073) and progression-free survival (PFS; P = .0037) than those with no TP53 aberration; no difference in OS or PFS was observed in patients with single aberration. TP53 mutation and del17p copresence was an independent predictor for short OS and PFS (adjusted hazard ratio 2.27; P = .0077).

Study details: This multicenter retrospective study included 229 patients with CLL treated with ibrutinib who were assayed for TP53 mutation and del17p in the same blood sample that was collected within 6 months before initiating ibrutinib.

Disclosures: This study was supported in part by the Italian Ministry of Health “Progetto Ricerca Finalizzata” and others. The authors declared no conflicts of interest.

Source: Bomben R et al. Clinical impact of TP53 disruption in chronic lymphocytic leukemia patients treated with ibrutinib: A campus CLL study. Leukemia. 2023 (Feb 18). Doi: 10.1038/s41375-023-01845-9

Key clinical point: Only the copresence of TP53 deletion (del17p) and mutations and not a single aberration has a negative prognostic impact in patients with chronic lymphocytic leukemia (CLL) receiving ibrutinib treatment.

Major finding: Only patients with concomitant TP53 mutations and del17p had significantly shorter overall survival (OS; P = .0073) and progression-free survival (PFS; P = .0037) than those with no TP53 aberration; no difference in OS or PFS was observed in patients with single aberration. TP53 mutation and del17p copresence was an independent predictor for short OS and PFS (adjusted hazard ratio 2.27; P = .0077).

Study details: This multicenter retrospective study included 229 patients with CLL treated with ibrutinib who were assayed for TP53 mutation and del17p in the same blood sample that was collected within 6 months before initiating ibrutinib.

Disclosures: This study was supported in part by the Italian Ministry of Health “Progetto Ricerca Finalizzata” and others. The authors declared no conflicts of interest.

Source: Bomben R et al. Clinical impact of TP53 disruption in chronic lymphocytic leukemia patients treated with ibrutinib: A campus CLL study. Leukemia. 2023 (Feb 18). Doi: 10.1038/s41375-023-01845-9

Key clinical point: Only the copresence of TP53 deletion (del17p) and mutations and not a single aberration has a negative prognostic impact in patients with chronic lymphocytic leukemia (CLL) receiving ibrutinib treatment.

Major finding: Only patients with concomitant TP53 mutations and del17p had significantly shorter overall survival (OS; P = .0073) and progression-free survival (PFS; P = .0037) than those with no TP53 aberration; no difference in OS or PFS was observed in patients with single aberration. TP53 mutation and del17p copresence was an independent predictor for short OS and PFS (adjusted hazard ratio 2.27; P = .0077).

Study details: This multicenter retrospective study included 229 patients with CLL treated with ibrutinib who were assayed for TP53 mutation and del17p in the same blood sample that was collected within 6 months before initiating ibrutinib.

Disclosures: This study was supported in part by the Italian Ministry of Health “Progetto Ricerca Finalizzata” and others. The authors declared no conflicts of interest.

Source: Bomben R et al. Clinical impact of TP53 disruption in chronic lymphocytic leukemia patients treated with ibrutinib: A campus CLL study. Leukemia. 2023 (Feb 18). Doi: 10.1038/s41375-023-01845-9

Key clinical point: Grade 3B follicular lymphoma (G3BFL) has similar survival outcomes to grade 3A FL (G3AFL) but a superior prognosis than diffuse large B-cell lymphoma (DLBCL) in immunotherapy-treated patients.

Major finding: At a median follow-up of 5 years, the G3BFL vs DLBCL group had a significantly longer progression-free survival (PFS; hazard ratio [HR] 1.73; P = .001) and overall survival (OS; HR 2.19; P ≤ .001), whereas PFS (HR 1.04; P = .81) and OS (HR 1.04; P = .84) were similar between the G3BFL and G3AFL groups.

Study details: This multicenter study analyzed the data of 157 patients with G3BFL, 302 patients with G3AFL, and 548 patients with DLBCL treated with rituximab/obinutuzumab, cyclophosphamide, doxorubicin, vincristine, and prednisolone-like chemotherapy with or without radiotherapy or bendamustine-rituximab.

Disclosures: The study did not receive any funding. Some authors reported ties with various organizations.

Source: Barraclough A et al. Outcomes in grade 3B follicular lymphoma: an international study led by the Australasian Lymphoma Alliance. Haematologica. 2023 (Feb 23). Doi: 10.3324/haematol.2022.281375

Key clinical point: Grade 3B follicular lymphoma (G3BFL) has similar survival outcomes to grade 3A FL (G3AFL) but a superior prognosis than diffuse large B-cell lymphoma (DLBCL) in immunotherapy-treated patients.

Major finding: At a median follow-up of 5 years, the G3BFL vs DLBCL group had a significantly longer progression-free survival (PFS; hazard ratio [HR] 1.73; P = .001) and overall survival (OS; HR 2.19; P ≤ .001), whereas PFS (HR 1.04; P = .81) and OS (HR 1.04; P = .84) were similar between the G3BFL and G3AFL groups.

Study details: This multicenter study analyzed the data of 157 patients with G3BFL, 302 patients with G3AFL, and 548 patients with DLBCL treated with rituximab/obinutuzumab, cyclophosphamide, doxorubicin, vincristine, and prednisolone-like chemotherapy with or without radiotherapy or bendamustine-rituximab.

Disclosures: The study did not receive any funding. Some authors reported ties with various organizations.

Source: Barraclough A et al. Outcomes in grade 3B follicular lymphoma: an international study led by the Australasian Lymphoma Alliance. Haematologica. 2023 (Feb 23). Doi: 10.3324/haematol.2022.281375

Key clinical point: Grade 3B follicular lymphoma (G3BFL) has similar survival outcomes to grade 3A FL (G3AFL) but a superior prognosis than diffuse large B-cell lymphoma (DLBCL) in immunotherapy-treated patients.

Major finding: At a median follow-up of 5 years, the G3BFL vs DLBCL group had a significantly longer progression-free survival (PFS; hazard ratio [HR] 1.73; P = .001) and overall survival (OS; HR 2.19; P ≤ .001), whereas PFS (HR 1.04; P = .81) and OS (HR 1.04; P = .84) were similar between the G3BFL and G3AFL groups.

Study details: This multicenter study analyzed the data of 157 patients with G3BFL, 302 patients with G3AFL, and 548 patients with DLBCL treated with rituximab/obinutuzumab, cyclophosphamide, doxorubicin, vincristine, and prednisolone-like chemotherapy with or without radiotherapy or bendamustine-rituximab.

Disclosures: The study did not receive any funding. Some authors reported ties with various organizations.

Source: Barraclough A et al. Outcomes in grade 3B follicular lymphoma: an international study led by the Australasian Lymphoma Alliance. Haematologica. 2023 (Feb 23). Doi: 10.3324/haematol.2022.281375

Key clinical point: Addition of ibrutinib to rituximab, ifosfamide, carboplatin, and etoposide (RICE) or rituximab, vincristine, ifosfamide, carboplatin, idarubicin, and dexamethasone (RVICI) provided no survival benefit in children and young adults with relapsed or refractory mature B-cell non-Hodgkin lymphoma (B-NHL).

Major finding: Patients receiving ibrutinib plus RICE/RVICI vs RICE/RVICI alone had similar median event-free survival (6.1 vs 7.0 months; hazard ratio [HR] 0.9; P = .387) and median overall survival (14.1 vs 11.1 months; HR 0.9; P = .789). All patients experienced grade ≥3 treatment-emergent adverse events.

Study details: Findings represent the final results of SPARKLE trial Part 2 that included 51 patients aged 1-30 years with relapsed or refractory mature B-NHL who were randomly assigned to receive ibrutinib plus RICE/RVICI (n = 35) or RICE/RVICI alone (n = 16).

Disclosures: This study was funded by Janssen Research and Development. Some authors reported ties with various organizations, including Janssen. Six authors declared being employees of Janssen or holding stocks in Johnson & Johnson.

Source: Burke GAA et al. Ibrutinib plus RICE or RVICI for relapsed/refractory mature B-cell non-Hodgkin lymphoma in children and young adults: SPARKLE trial. Blood Adv. 2023;7(4):602-610 (Feb 20). Doi: 10.1182/bloodadvances.2022008802

Key clinical point: Addition of ibrutinib to rituximab, ifosfamide, carboplatin, and etoposide (RICE) or rituximab, vincristine, ifosfamide, carboplatin, idarubicin, and dexamethasone (RVICI) provided no survival benefit in children and young adults with relapsed or refractory mature B-cell non-Hodgkin lymphoma (B-NHL).

Major finding: Patients receiving ibrutinib plus RICE/RVICI vs RICE/RVICI alone had similar median event-free survival (6.1 vs 7.0 months; hazard ratio [HR] 0.9; P = .387) and median overall survival (14.1 vs 11.1 months; HR 0.9; P = .789). All patients experienced grade ≥3 treatment-emergent adverse events.

Study details: Findings represent the final results of SPARKLE trial Part 2 that included 51 patients aged 1-30 years with relapsed or refractory mature B-NHL who were randomly assigned to receive ibrutinib plus RICE/RVICI (n = 35) or RICE/RVICI alone (n = 16).

Disclosures: This study was funded by Janssen Research and Development. Some authors reported ties with various organizations, including Janssen. Six authors declared being employees of Janssen or holding stocks in Johnson & Johnson.

Source: Burke GAA et al. Ibrutinib plus RICE or RVICI for relapsed/refractory mature B-cell non-Hodgkin lymphoma in children and young adults: SPARKLE trial. Blood Adv. 2023;7(4):602-610 (Feb 20). Doi: 10.1182/bloodadvances.2022008802

Key clinical point: Addition of ibrutinib to rituximab, ifosfamide, carboplatin, and etoposide (RICE) or rituximab, vincristine, ifosfamide, carboplatin, idarubicin, and dexamethasone (RVICI) provided no survival benefit in children and young adults with relapsed or refractory mature B-cell non-Hodgkin lymphoma (B-NHL).

Major finding: Patients receiving ibrutinib plus RICE/RVICI vs RICE/RVICI alone had similar median event-free survival (6.1 vs 7.0 months; hazard ratio [HR] 0.9; P = .387) and median overall survival (14.1 vs 11.1 months; HR 0.9; P = .789). All patients experienced grade ≥3 treatment-emergent adverse events.

Study details: Findings represent the final results of SPARKLE trial Part 2 that included 51 patients aged 1-30 years with relapsed or refractory mature B-NHL who were randomly assigned to receive ibrutinib plus RICE/RVICI (n = 35) or RICE/RVICI alone (n = 16).

Disclosures: This study was funded by Janssen Research and Development. Some authors reported ties with various organizations, including Janssen. Six authors declared being employees of Janssen or holding stocks in Johnson & Johnson.

Source: Burke GAA et al. Ibrutinib plus RICE or RVICI for relapsed/refractory mature B-cell non-Hodgkin lymphoma in children and young adults: SPARKLE trial. Blood Adv. 2023;7(4):602-610 (Feb 20). Doi: 10.1182/bloodadvances.2022008802

Key clinical point: Long-term zanubrutinib monotherapy continued to yield high response and survival rates in patients with relapsed or refractory chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) without compromising safety.

Major finding: At a median follow-up of 34 months, the overall response rate was 87.9% (95% CI 79.4%-93.8%). The median progression-free survival (PFS) or overall survival (OS) was not reached; the estimated PFS event-free and OS rates at 30 months were 75.7% (95% CI 65.2%-83.4%) and 88.6% (95% CI 79.8%-93.7%), respectively. No new safety signals were identified.

Study details: This long-term follow-up analysis of a phase 2 study included 91 patients with CLL/SLL who relapsed after or were refractory to ≥1 prior line of therapy and received 160 mg oral zanubrutinib twice daily.

Disclosures: The phase 2 study was sponsored by BeiGene (Beijing) Co., Ltd., China, and BeiGene USA, Inc., USA. Some authors declared being employees of and holding stocks in BeiGene.

Source: Xu W et al. Zanubrutinib in patients with relapsed/refractory chronic lymphocytic leukemia/small lymphocytic lymphoma: Final results and correlative analysis of lymphocytosis. Leuk Lymphoma. 2023;1-5 (Feb 17). Doi: 10.1080/10428194.2022.2164692

Key clinical point: Long-term zanubrutinib monotherapy continued to yield high response and survival rates in patients with relapsed or refractory chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) without compromising safety.

Major finding: At a median follow-up of 34 months, the overall response rate was 87.9% (95% CI 79.4%-93.8%). The median progression-free survival (PFS) or overall survival (OS) was not reached; the estimated PFS event-free and OS rates at 30 months were 75.7% (95% CI 65.2%-83.4%) and 88.6% (95% CI 79.8%-93.7%), respectively. No new safety signals were identified.

Study details: This long-term follow-up analysis of a phase 2 study included 91 patients with CLL/SLL who relapsed after or were refractory to ≥1 prior line of therapy and received 160 mg oral zanubrutinib twice daily.

Disclosures: The phase 2 study was sponsored by BeiGene (Beijing) Co., Ltd., China, and BeiGene USA, Inc., USA. Some authors declared being employees of and holding stocks in BeiGene.

Source: Xu W et al. Zanubrutinib in patients with relapsed/refractory chronic lymphocytic leukemia/small lymphocytic lymphoma: Final results and correlative analysis of lymphocytosis. Leuk Lymphoma. 2023;1-5 (Feb 17). Doi: 10.1080/10428194.2022.2164692

Key clinical point: Long-term zanubrutinib monotherapy continued to yield high response and survival rates in patients with relapsed or refractory chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) without compromising safety.

Major finding: At a median follow-up of 34 months, the overall response rate was 87.9% (95% CI 79.4%-93.8%). The median progression-free survival (PFS) or overall survival (OS) was not reached; the estimated PFS event-free and OS rates at 30 months were 75.7% (95% CI 65.2%-83.4%) and 88.6% (95% CI 79.8%-93.7%), respectively. No new safety signals were identified.

Study details: This long-term follow-up analysis of a phase 2 study included 91 patients with CLL/SLL who relapsed after or were refractory to ≥1 prior line of therapy and received 160 mg oral zanubrutinib twice daily.

Disclosures: The phase 2 study was sponsored by BeiGene (Beijing) Co., Ltd., China, and BeiGene USA, Inc., USA. Some authors declared being employees of and holding stocks in BeiGene.

Source: Xu W et al. Zanubrutinib in patients with relapsed/refractory chronic lymphocytic leukemia/small lymphocytic lymphoma: Final results and correlative analysis of lymphocytosis. Leuk Lymphoma. 2023;1-5 (Feb 17). Doi: 10.1080/10428194.2022.2164692

Key clinical point: Patients hospitalized with immune thrombocytopenia (ITP) and concomitant chronic lymphocytic leukemia (CLL) have a greater risk for death, require more blood products, and have poorer hospitalization outcomes compared with those with ITP without CLL.

Major finding: The risks for all-cause mortality (adjusted odds ratio [aOR] 1.28), gastrointestinal bleeding (aOR 1.19), packed red blood cell transfusion (aOR 1.79), splenectomy (aOR 1.30), and platelet transfusion (aOR, 1.49) were higher in patients with ITP and CLL vs those with ITP without CLL (all P < .01).

Study details: The data come from a retrospective study including patients hospitalized for ITP who did (n = 15,672) and did not (n = 646,499) have concurrent CLL.

Disclosures: This study did not report the source of funding. Some authors declared receiving research grants or consulting fees from various sources.

Source: Ammad Ud Din M et al. Risks and outcomes of hospitalizations in patients with chronic lymphocytic leukemia admitted with immune thrombocytopenia: An analysis of the National Inpatient Sample Database. Ann Hematol. 2023;102(4):889-895 (Feb 13). Doi: 10.1007/s00277-023-05133-5

Key clinical point: Patients hospitalized with immune thrombocytopenia (ITP) and concomitant chronic lymphocytic leukemia (CLL) have a greater risk for death, require more blood products, and have poorer hospitalization outcomes compared with those with ITP without CLL.

Major finding: The risks for all-cause mortality (adjusted odds ratio [aOR] 1.28), gastrointestinal bleeding (aOR 1.19), packed red blood cell transfusion (aOR 1.79), splenectomy (aOR 1.30), and platelet transfusion (aOR, 1.49) were higher in patients with ITP and CLL vs those with ITP without CLL (all P < .01).

Study details: The data come from a retrospective study including patients hospitalized for ITP who did (n = 15,672) and did not (n = 646,499) have concurrent CLL.

Disclosures: This study did not report the source of funding. Some authors declared receiving research grants or consulting fees from various sources.

Source: Ammad Ud Din M et al. Risks and outcomes of hospitalizations in patients with chronic lymphocytic leukemia admitted with immune thrombocytopenia: An analysis of the National Inpatient Sample Database. Ann Hematol. 2023;102(4):889-895 (Feb 13). Doi: 10.1007/s00277-023-05133-5

Key clinical point: Patients hospitalized with immune thrombocytopenia (ITP) and concomitant chronic lymphocytic leukemia (CLL) have a greater risk for death, require more blood products, and have poorer hospitalization outcomes compared with those with ITP without CLL.

Major finding: The risks for all-cause mortality (adjusted odds ratio [aOR] 1.28), gastrointestinal bleeding (aOR 1.19), packed red blood cell transfusion (aOR 1.79), splenectomy (aOR 1.30), and platelet transfusion (aOR, 1.49) were higher in patients with ITP and CLL vs those with ITP without CLL (all P < .01).

Study details: The data come from a retrospective study including patients hospitalized for ITP who did (n = 15,672) and did not (n = 646,499) have concurrent CLL.

Disclosures: This study did not report the source of funding. Some authors declared receiving research grants or consulting fees from various sources.

Source: Ammad Ud Din M et al. Risks and outcomes of hospitalizations in patients with chronic lymphocytic leukemia admitted with immune thrombocytopenia: An analysis of the National Inpatient Sample Database. Ann Hematol. 2023;102(4):889-895 (Feb 13). Doi: 10.1007/s00277-023-05133-5