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Venetoclax shows promise for r/r hairy cell leukemia
Venetoclax is already approved for adults with chronic lymphocytic leukemia, small lymphocytic leukemia, and as part of a treatment combination in certain patients with acute myeloid leukemia.
The new findings suggest that the drug could also be a chemotherapy-free treatment option for HCL patients after the failure of multiple prior lines of therapy, including vemurafenib plus rituximab, the investigators wrote in a letter to the editor published in the New England Journal of Medicine.
Treatment options for such patients are limited, they noted.
Enrico Tiacci, MD, of the University of Perugia (Italy), and colleagues decided to explore the use of venetoclax in this patient population after reports of in vitro findings showing a possible benefit.
The investigators administered the drug off-label to six patients who had received vemurafenib plus rituximab as their most recent prior therapy; one was resistant and five relapsed after that therapy, they reported. Venetoclax was delivered in 29-day cycles.
After 6 or 12 cycles, two patients experienced complete remission with minimal residual disease (MRD), and one had partial remission, although each had incomplete platelet recovery.
Adding rituximab at a dose of 375 mg per square meter of body-surface area for three to eight cycles improved the depth of response in a patient who had a previous minor response, further reduced MRD in one who had a complete remission to venetoclax, and led to hematologic remission in one who had no response to venetoclax, they noted.
Progression-free survival ranged from 23 to 53-plus months in all five patients who did not have early progression and was similar or better than PFS seen after vemurafenib plus rituximab.
The main toxic effect of venetoclax was worsening of baseline neutropenia, which was sometimes complicated by infections or febrile neutropenia and was managed by dose reductions and granulocyte colony-stimulating factor.
“Thus, venetoclax with or without rituximab may serve as a safe and effective salvage option after failure of vemurafenib plus rituximab treatment, especially in patients who do not require a rapid recovery of blood count,” they concluded.
The study was supported by grants from Fondazione Associazione Italiana per la Ricerca sul Cancro and the Italian Ministry of Health.
A version of this article first appeared on Medscape.com.
Venetoclax is already approved for adults with chronic lymphocytic leukemia, small lymphocytic leukemia, and as part of a treatment combination in certain patients with acute myeloid leukemia.
The new findings suggest that the drug could also be a chemotherapy-free treatment option for HCL patients after the failure of multiple prior lines of therapy, including vemurafenib plus rituximab, the investigators wrote in a letter to the editor published in the New England Journal of Medicine.
Treatment options for such patients are limited, they noted.
Enrico Tiacci, MD, of the University of Perugia (Italy), and colleagues decided to explore the use of venetoclax in this patient population after reports of in vitro findings showing a possible benefit.
The investigators administered the drug off-label to six patients who had received vemurafenib plus rituximab as their most recent prior therapy; one was resistant and five relapsed after that therapy, they reported. Venetoclax was delivered in 29-day cycles.
After 6 or 12 cycles, two patients experienced complete remission with minimal residual disease (MRD), and one had partial remission, although each had incomplete platelet recovery.
Adding rituximab at a dose of 375 mg per square meter of body-surface area for three to eight cycles improved the depth of response in a patient who had a previous minor response, further reduced MRD in one who had a complete remission to venetoclax, and led to hematologic remission in one who had no response to venetoclax, they noted.
Progression-free survival ranged from 23 to 53-plus months in all five patients who did not have early progression and was similar or better than PFS seen after vemurafenib plus rituximab.
The main toxic effect of venetoclax was worsening of baseline neutropenia, which was sometimes complicated by infections or febrile neutropenia and was managed by dose reductions and granulocyte colony-stimulating factor.
“Thus, venetoclax with or without rituximab may serve as a safe and effective salvage option after failure of vemurafenib plus rituximab treatment, especially in patients who do not require a rapid recovery of blood count,” they concluded.
The study was supported by grants from Fondazione Associazione Italiana per la Ricerca sul Cancro and the Italian Ministry of Health.
A version of this article first appeared on Medscape.com.
Venetoclax is already approved for adults with chronic lymphocytic leukemia, small lymphocytic leukemia, and as part of a treatment combination in certain patients with acute myeloid leukemia.
The new findings suggest that the drug could also be a chemotherapy-free treatment option for HCL patients after the failure of multiple prior lines of therapy, including vemurafenib plus rituximab, the investigators wrote in a letter to the editor published in the New England Journal of Medicine.
Treatment options for such patients are limited, they noted.
Enrico Tiacci, MD, of the University of Perugia (Italy), and colleagues decided to explore the use of venetoclax in this patient population after reports of in vitro findings showing a possible benefit.
The investigators administered the drug off-label to six patients who had received vemurafenib plus rituximab as their most recent prior therapy; one was resistant and five relapsed after that therapy, they reported. Venetoclax was delivered in 29-day cycles.
After 6 or 12 cycles, two patients experienced complete remission with minimal residual disease (MRD), and one had partial remission, although each had incomplete platelet recovery.
Adding rituximab at a dose of 375 mg per square meter of body-surface area for three to eight cycles improved the depth of response in a patient who had a previous minor response, further reduced MRD in one who had a complete remission to venetoclax, and led to hematologic remission in one who had no response to venetoclax, they noted.
Progression-free survival ranged from 23 to 53-plus months in all five patients who did not have early progression and was similar or better than PFS seen after vemurafenib plus rituximab.
The main toxic effect of venetoclax was worsening of baseline neutropenia, which was sometimes complicated by infections or febrile neutropenia and was managed by dose reductions and granulocyte colony-stimulating factor.
“Thus, venetoclax with or without rituximab may serve as a safe and effective salvage option after failure of vemurafenib plus rituximab treatment, especially in patients who do not require a rapid recovery of blood count,” they concluded.
The study was supported by grants from Fondazione Associazione Italiana per la Ricerca sul Cancro and the Italian Ministry of Health.
A version of this article first appeared on Medscape.com.
FROM THE NEW ENGLAND JOURNAL OF MEDICINE
CLL treatment: More infections among real-world patients
For example, “the rate of severe infection for ibrutinib in clinical trials ranged from 12.8% to 45% with median follow-up ranging from 27 to 65 months. In our study, the rate of severe infection was 45.3% within a shorter median follow-up period of 23.3 months,” said study lead author Amanda Tey, MPharm, a hematology pharmacist with Monash Health in Clayton, Australia, in an interview.
The results suggest that “real-world severe infection risk is higher than previously appreciated,” said Ms. Tey, whose findings were published in the European Journal of Hematology. “Poor performance status and a high comorbidity burden further increase this risk.”
According to the study, there are limited data about real-world infection rates for patients with CLL or B-cell lymphoma who take the three drugs.
Both the underlying blood cancer and the drugs themselves may disrupt the immune system in these patients, Ms. Tey noted. “Ibrutinib inhibits interleukin-2-inducible T-cell kinase, which has a role in T-cell maturation. Idelalisib reduces regulatory T-cell activity and natural killer cell and neutrophil inflammatory responses. Venetoclax is associated with a high rate of neutropenia.”
For the new retrospective, single-center study, researchers tracked adult patients who’d received the drugs from 2014 to 2021 in a hospital network serving 1.5 million people in the Australian state of Victoria. The primary outcome was severe infection of grade 3 or higher. Patients were excluded for such factors as having been primarily treated at other facilities, receiving less than 30 days of treatment, or having been treated for other indications such as primary central nervous system lymphoma.
Of the 67 patients in the study, the numbers taking the drugs were 53 (ibrutinib), 8 (idelalisib), and 6 (venetoclax). Eleven patients took more than one drug. Median age was 73 years, and 73% of patients were male.
Patients spent a median 23.3, 4.8, and 3.5 months taking ibrutinib, idelalisib, and venetoclax, respectively, before treatment stopped or data were collected. Patients were commonly prescribed antimicrobials to prevent pneumocystis jirovecii pneumonia and herpes simplex virus (HSV)/varicella zoster virus (VZV) infection.
Researchers found that 48% of the patients had at least one serious infection: 45% of those on ibrutinib, 63% of those on idelalisib, and 50% of those on venetoclax. Seven patients died of infections.
In comparison, the researchers reported, a systematic review of idelalisib in blood cancer clinical trials reported an overall infection rate of 28%, while clinical trials reported an infection rate of 17.5%-22% in patients taking venetoclax for CLL.
Poor performance status and higher levels of comorbidity were linked to higher risk of infection, and infections occurred at a median of 5.4 months.
Lead author Ms. Tey highlighted the fact that most of the patients in the new study had relapsed/refractory disease. The infection risk in the real-world first-line setting is unknown, she said. “Furthermore, due to the size of our study and high uptake of antimicrobial prophylaxis, the optimal prophylaxis strategy for these patients remains unclear.”
In an interview, infectious disease physician Gemma Reynolds, MChD, MPH, of Austin Health and Peter MacCallum Cancer Center in Melbourne, said the study findings reflect “a lot of what we know from other observational studies and clinical practice. There is a risk of infection, and serious infection, associated with these agents. Sometimes the pathogen is classically opportunistic, but often it is bacterial, and respiratory sites are common. Infections often occur early into a course of therapy.”
Dr. Reynolds, who didn’t take part in the study, urged colleagues to cast a wide net if a patient appears to have an infection but doesn’t respond to conventional therapies such as antibiotics. “Unusual infections are possible,” she said, and aggressive early workups may be advisable via blood cultures, viral swabs, sputum culture, early imaging, bronchoscopy, and preemptive monitoring in patients with a prior infection history with a disease such as CMV.
Alessandra Ferrajoli, MD, a hematologist/oncologist at MD Anderson Cancer Center who also didn’t take part in the study, agreed in an interview that the findings reflect those found in other reports. “It should be highlighted that the population studied is at particular high risk for infections given the high proportion of patients with recurrent disease (85%), many patients with concurrent hypogammaglobulinemia (64%), and the patient median age of 73 years and a high comorbidities burden,” she said. “In my view, this explains the higher rate of infections reported in this study, when compared to other case series.”
Dr. Ferrajoli added that there’s no standard antimicrobial prophylaxis for patients with B-cell malignancies receiving targeted therapies. “Anti-HSV/VZV prophylaxis is commonly implemented. Additional antiviral, antimicrobial, and antifungal prophylaxis should be used based on patients’ absolute neutrophil and T-cell count and individual risk factors, including prior history of infections such as CMV, prior splenectomy, and history of invasive fungal infections.”
The study was funded by Monash Health, the National Health and Medical Research Council (Australia), and the Society of Hospital Pharmacists of Australia. Ms. Tey reported no disclosures. Some of the study authors reported multiple disclosures. Dr. Reynolds discloses a PhD scholarship from the National Health and Medical Research Council. Dr. Ferrajoli reported no disclosures.
For example, “the rate of severe infection for ibrutinib in clinical trials ranged from 12.8% to 45% with median follow-up ranging from 27 to 65 months. In our study, the rate of severe infection was 45.3% within a shorter median follow-up period of 23.3 months,” said study lead author Amanda Tey, MPharm, a hematology pharmacist with Monash Health in Clayton, Australia, in an interview.
The results suggest that “real-world severe infection risk is higher than previously appreciated,” said Ms. Tey, whose findings were published in the European Journal of Hematology. “Poor performance status and a high comorbidity burden further increase this risk.”
According to the study, there are limited data about real-world infection rates for patients with CLL or B-cell lymphoma who take the three drugs.
Both the underlying blood cancer and the drugs themselves may disrupt the immune system in these patients, Ms. Tey noted. “Ibrutinib inhibits interleukin-2-inducible T-cell kinase, which has a role in T-cell maturation. Idelalisib reduces regulatory T-cell activity and natural killer cell and neutrophil inflammatory responses. Venetoclax is associated with a high rate of neutropenia.”
For the new retrospective, single-center study, researchers tracked adult patients who’d received the drugs from 2014 to 2021 in a hospital network serving 1.5 million people in the Australian state of Victoria. The primary outcome was severe infection of grade 3 or higher. Patients were excluded for such factors as having been primarily treated at other facilities, receiving less than 30 days of treatment, or having been treated for other indications such as primary central nervous system lymphoma.
Of the 67 patients in the study, the numbers taking the drugs were 53 (ibrutinib), 8 (idelalisib), and 6 (venetoclax). Eleven patients took more than one drug. Median age was 73 years, and 73% of patients were male.
Patients spent a median 23.3, 4.8, and 3.5 months taking ibrutinib, idelalisib, and venetoclax, respectively, before treatment stopped or data were collected. Patients were commonly prescribed antimicrobials to prevent pneumocystis jirovecii pneumonia and herpes simplex virus (HSV)/varicella zoster virus (VZV) infection.
Researchers found that 48% of the patients had at least one serious infection: 45% of those on ibrutinib, 63% of those on idelalisib, and 50% of those on venetoclax. Seven patients died of infections.
In comparison, the researchers reported, a systematic review of idelalisib in blood cancer clinical trials reported an overall infection rate of 28%, while clinical trials reported an infection rate of 17.5%-22% in patients taking venetoclax for CLL.
Poor performance status and higher levels of comorbidity were linked to higher risk of infection, and infections occurred at a median of 5.4 months.
Lead author Ms. Tey highlighted the fact that most of the patients in the new study had relapsed/refractory disease. The infection risk in the real-world first-line setting is unknown, she said. “Furthermore, due to the size of our study and high uptake of antimicrobial prophylaxis, the optimal prophylaxis strategy for these patients remains unclear.”
In an interview, infectious disease physician Gemma Reynolds, MChD, MPH, of Austin Health and Peter MacCallum Cancer Center in Melbourne, said the study findings reflect “a lot of what we know from other observational studies and clinical practice. There is a risk of infection, and serious infection, associated with these agents. Sometimes the pathogen is classically opportunistic, but often it is bacterial, and respiratory sites are common. Infections often occur early into a course of therapy.”
Dr. Reynolds, who didn’t take part in the study, urged colleagues to cast a wide net if a patient appears to have an infection but doesn’t respond to conventional therapies such as antibiotics. “Unusual infections are possible,” she said, and aggressive early workups may be advisable via blood cultures, viral swabs, sputum culture, early imaging, bronchoscopy, and preemptive monitoring in patients with a prior infection history with a disease such as CMV.
Alessandra Ferrajoli, MD, a hematologist/oncologist at MD Anderson Cancer Center who also didn’t take part in the study, agreed in an interview that the findings reflect those found in other reports. “It should be highlighted that the population studied is at particular high risk for infections given the high proportion of patients with recurrent disease (85%), many patients with concurrent hypogammaglobulinemia (64%), and the patient median age of 73 years and a high comorbidities burden,” she said. “In my view, this explains the higher rate of infections reported in this study, when compared to other case series.”
Dr. Ferrajoli added that there’s no standard antimicrobial prophylaxis for patients with B-cell malignancies receiving targeted therapies. “Anti-HSV/VZV prophylaxis is commonly implemented. Additional antiviral, antimicrobial, and antifungal prophylaxis should be used based on patients’ absolute neutrophil and T-cell count and individual risk factors, including prior history of infections such as CMV, prior splenectomy, and history of invasive fungal infections.”
The study was funded by Monash Health, the National Health and Medical Research Council (Australia), and the Society of Hospital Pharmacists of Australia. Ms. Tey reported no disclosures. Some of the study authors reported multiple disclosures. Dr. Reynolds discloses a PhD scholarship from the National Health and Medical Research Council. Dr. Ferrajoli reported no disclosures.
For example, “the rate of severe infection for ibrutinib in clinical trials ranged from 12.8% to 45% with median follow-up ranging from 27 to 65 months. In our study, the rate of severe infection was 45.3% within a shorter median follow-up period of 23.3 months,” said study lead author Amanda Tey, MPharm, a hematology pharmacist with Monash Health in Clayton, Australia, in an interview.
The results suggest that “real-world severe infection risk is higher than previously appreciated,” said Ms. Tey, whose findings were published in the European Journal of Hematology. “Poor performance status and a high comorbidity burden further increase this risk.”
According to the study, there are limited data about real-world infection rates for patients with CLL or B-cell lymphoma who take the three drugs.
Both the underlying blood cancer and the drugs themselves may disrupt the immune system in these patients, Ms. Tey noted. “Ibrutinib inhibits interleukin-2-inducible T-cell kinase, which has a role in T-cell maturation. Idelalisib reduces regulatory T-cell activity and natural killer cell and neutrophil inflammatory responses. Venetoclax is associated with a high rate of neutropenia.”
For the new retrospective, single-center study, researchers tracked adult patients who’d received the drugs from 2014 to 2021 in a hospital network serving 1.5 million people in the Australian state of Victoria. The primary outcome was severe infection of grade 3 or higher. Patients were excluded for such factors as having been primarily treated at other facilities, receiving less than 30 days of treatment, or having been treated for other indications such as primary central nervous system lymphoma.
Of the 67 patients in the study, the numbers taking the drugs were 53 (ibrutinib), 8 (idelalisib), and 6 (venetoclax). Eleven patients took more than one drug. Median age was 73 years, and 73% of patients were male.
Patients spent a median 23.3, 4.8, and 3.5 months taking ibrutinib, idelalisib, and venetoclax, respectively, before treatment stopped or data were collected. Patients were commonly prescribed antimicrobials to prevent pneumocystis jirovecii pneumonia and herpes simplex virus (HSV)/varicella zoster virus (VZV) infection.
Researchers found that 48% of the patients had at least one serious infection: 45% of those on ibrutinib, 63% of those on idelalisib, and 50% of those on venetoclax. Seven patients died of infections.
In comparison, the researchers reported, a systematic review of idelalisib in blood cancer clinical trials reported an overall infection rate of 28%, while clinical trials reported an infection rate of 17.5%-22% in patients taking venetoclax for CLL.
Poor performance status and higher levels of comorbidity were linked to higher risk of infection, and infections occurred at a median of 5.4 months.
Lead author Ms. Tey highlighted the fact that most of the patients in the new study had relapsed/refractory disease. The infection risk in the real-world first-line setting is unknown, she said. “Furthermore, due to the size of our study and high uptake of antimicrobial prophylaxis, the optimal prophylaxis strategy for these patients remains unclear.”
In an interview, infectious disease physician Gemma Reynolds, MChD, MPH, of Austin Health and Peter MacCallum Cancer Center in Melbourne, said the study findings reflect “a lot of what we know from other observational studies and clinical practice. There is a risk of infection, and serious infection, associated with these agents. Sometimes the pathogen is classically opportunistic, but often it is bacterial, and respiratory sites are common. Infections often occur early into a course of therapy.”
Dr. Reynolds, who didn’t take part in the study, urged colleagues to cast a wide net if a patient appears to have an infection but doesn’t respond to conventional therapies such as antibiotics. “Unusual infections are possible,” she said, and aggressive early workups may be advisable via blood cultures, viral swabs, sputum culture, early imaging, bronchoscopy, and preemptive monitoring in patients with a prior infection history with a disease such as CMV.
Alessandra Ferrajoli, MD, a hematologist/oncologist at MD Anderson Cancer Center who also didn’t take part in the study, agreed in an interview that the findings reflect those found in other reports. “It should be highlighted that the population studied is at particular high risk for infections given the high proportion of patients with recurrent disease (85%), many patients with concurrent hypogammaglobulinemia (64%), and the patient median age of 73 years and a high comorbidities burden,” she said. “In my view, this explains the higher rate of infections reported in this study, when compared to other case series.”
Dr. Ferrajoli added that there’s no standard antimicrobial prophylaxis for patients with B-cell malignancies receiving targeted therapies. “Anti-HSV/VZV prophylaxis is commonly implemented. Additional antiviral, antimicrobial, and antifungal prophylaxis should be used based on patients’ absolute neutrophil and T-cell count and individual risk factors, including prior history of infections such as CMV, prior splenectomy, and history of invasive fungal infections.”
The study was funded by Monash Health, the National Health and Medical Research Council (Australia), and the Society of Hospital Pharmacists of Australia. Ms. Tey reported no disclosures. Some of the study authors reported multiple disclosures. Dr. Reynolds discloses a PhD scholarship from the National Health and Medical Research Council. Dr. Ferrajoli reported no disclosures.
FROM THE EUROPEAN JOURNAL OF HEMATOLOGY
Surviving CLL: Higher risk of other cancer DXs
The report, which appeared in January in Blood Cancer Journal, found that patients diagnosed with CLL between 1989 and 2019 were 63% more likely to were diagnosed with SPM than a matched population: standardized incidence ratio = 1.63, 95% confidence interval (CI), 1.59-1.68.
“Our results provide patients and their treating physicians with an overview of the risk of SPM development. This information can be used in treatment decision-making and for planning appropriate surveillance activities and interventions,” study lead author Lina van der Straten, MD, PhD, of the Albert Schweitzer Hospital and Erasmus University Medical Center in the Netherlands, said in an interview.
Ohio State University hematologist David Bond, MD, who’s familiar with the findings, said in an interview that “it’s been well-established that patients with CLL are at increased risk for second primary malignancies. This is thought to be due to impaired immune surveillance and possibly carcinogenic effects of CLL treatments.” It’s not clear, he said, “whether the rate of second cancers differs between chemoimmunotherapy-treated patients and those receiving newer oral kinase inhibitors.”
Previous research into CLL and SPM has been sparse, Dr. van der Straten said, and most studies haven’t looked at SPM over time and taken into account the widespread use of chemoimmunotherapy and agents such as ibrutinib and venetoclax.
It’s important to study this topic, she said, since “cancers diagnosed after the CLL diagnosis can outweigh the improved longevity and contribute to excess morbidity and mortality in long-term CLL survivors.”
With the help of the Netherlands Cancer Registry, researchers tracked 24,815 patients with CLL who were diagnosed over the 20-year period; 4,369 developed SPM. “We demonstrated that the risk of SPM development was higher than in the general population with an excess of 125 malignancies per 10,000 person-years in the CLL cohort,” Dr. van der Straten said. “The risk of SPM development was found to be heightened in solid and hematological cancers. Patients with CLL had an increased risk of developing cancers at the following sites or types: skin, acute myeloid leukemia, soft-tissue sarcomas, thyroid, kidney, unknown primary localization, non-Hodgkin lymphomas, lung and bronchus, and colon and rectum.”
Specifically, the study reports that “elevated risk was observed for solid (SIR = 1.67; 95% CI, 1.65-1.75) and hematological SPMs (SIR = 1.42; 95% CI, 1.24-1.62). The highest risk for SPMs was noted beyond 5 years post diagnosis (SIR = 1.70; 95% CI, 1.62-1.77), for male individuals (SIR = 1.70; 95% CI, 1.64-1.77), and patients aged 18-69 years (SR = 1.92; 95% CI, 1.79-2.05).
“Patients with CLL exposed to treatment have a higher risk of SPM development than patients who will never receive therapy,” Dr. van der Straten said. Research has shown that “treatment with fludarabine, cyclophosphamide, and rituximab has been associated with a 2.38 increased risk for SPM development, particularly acute myeloid leukemia. Indeed, we found an increased risk for hematological malignancies in patients diagnosed between 2003-2009 and 2010-2019, which might be explained by the broader administration of fludarabine-based strategies in these calendar periods.”
Multiple factors could explain the higher risk of SPM in patients with CLL, including “a dysregulated immune system, treatment-related effects, and surveillance bias,” Dr. van der Straten said. “In addition, it is proposed that the immune dysfunctional nature of CLL might enhance the effect of common carcinogens, such as UV exposure and smoking, in increasing the probability of skin and respiratory cancers.”
She added that “the risk and the spectrum of SPMs were comparable for the 2003-2009 and 2010-2019 periods, suggesting that both the introduction of chemoimmunotherapy and, in part, targeted therapies did not dramatically alter the SPM landscape. However, due to the short follow-up period for the small cohort of patients receiving targeted therapies, further research is warranted.”
Dr. Bond said the findings “are largely in line with prior studies and strengthen their conclusions. Immune surveillance appears to be critical to reducing the risk for some but not all malignancies including lung cancer and melanoma, and the treatments given for CLL can cause immune suppression and thus may increase the risk.”
Moving forward, he said, “this research highlights the importance of second cancers to patients with CLL. It also highlights the need for secondary cancer screening for CLL patients, patient education to avoid known cancer risk factors including smoking and excess UV light exposure, and the need as a field to continue to invest in research into characteristics of second cancers and mitigation strategies.”
Study funding was not reported. The authors and Dr. Bond report no disclosures.
The report, which appeared in January in Blood Cancer Journal, found that patients diagnosed with CLL between 1989 and 2019 were 63% more likely to were diagnosed with SPM than a matched population: standardized incidence ratio = 1.63, 95% confidence interval (CI), 1.59-1.68.
“Our results provide patients and their treating physicians with an overview of the risk of SPM development. This information can be used in treatment decision-making and for planning appropriate surveillance activities and interventions,” study lead author Lina van der Straten, MD, PhD, of the Albert Schweitzer Hospital and Erasmus University Medical Center in the Netherlands, said in an interview.
Ohio State University hematologist David Bond, MD, who’s familiar with the findings, said in an interview that “it’s been well-established that patients with CLL are at increased risk for second primary malignancies. This is thought to be due to impaired immune surveillance and possibly carcinogenic effects of CLL treatments.” It’s not clear, he said, “whether the rate of second cancers differs between chemoimmunotherapy-treated patients and those receiving newer oral kinase inhibitors.”
Previous research into CLL and SPM has been sparse, Dr. van der Straten said, and most studies haven’t looked at SPM over time and taken into account the widespread use of chemoimmunotherapy and agents such as ibrutinib and venetoclax.
It’s important to study this topic, she said, since “cancers diagnosed after the CLL diagnosis can outweigh the improved longevity and contribute to excess morbidity and mortality in long-term CLL survivors.”
With the help of the Netherlands Cancer Registry, researchers tracked 24,815 patients with CLL who were diagnosed over the 20-year period; 4,369 developed SPM. “We demonstrated that the risk of SPM development was higher than in the general population with an excess of 125 malignancies per 10,000 person-years in the CLL cohort,” Dr. van der Straten said. “The risk of SPM development was found to be heightened in solid and hematological cancers. Patients with CLL had an increased risk of developing cancers at the following sites or types: skin, acute myeloid leukemia, soft-tissue sarcomas, thyroid, kidney, unknown primary localization, non-Hodgkin lymphomas, lung and bronchus, and colon and rectum.”
Specifically, the study reports that “elevated risk was observed for solid (SIR = 1.67; 95% CI, 1.65-1.75) and hematological SPMs (SIR = 1.42; 95% CI, 1.24-1.62). The highest risk for SPMs was noted beyond 5 years post diagnosis (SIR = 1.70; 95% CI, 1.62-1.77), for male individuals (SIR = 1.70; 95% CI, 1.64-1.77), and patients aged 18-69 years (SR = 1.92; 95% CI, 1.79-2.05).
“Patients with CLL exposed to treatment have a higher risk of SPM development than patients who will never receive therapy,” Dr. van der Straten said. Research has shown that “treatment with fludarabine, cyclophosphamide, and rituximab has been associated with a 2.38 increased risk for SPM development, particularly acute myeloid leukemia. Indeed, we found an increased risk for hematological malignancies in patients diagnosed between 2003-2009 and 2010-2019, which might be explained by the broader administration of fludarabine-based strategies in these calendar periods.”
Multiple factors could explain the higher risk of SPM in patients with CLL, including “a dysregulated immune system, treatment-related effects, and surveillance bias,” Dr. van der Straten said. “In addition, it is proposed that the immune dysfunctional nature of CLL might enhance the effect of common carcinogens, such as UV exposure and smoking, in increasing the probability of skin and respiratory cancers.”
She added that “the risk and the spectrum of SPMs were comparable for the 2003-2009 and 2010-2019 periods, suggesting that both the introduction of chemoimmunotherapy and, in part, targeted therapies did not dramatically alter the SPM landscape. However, due to the short follow-up period for the small cohort of patients receiving targeted therapies, further research is warranted.”
Dr. Bond said the findings “are largely in line with prior studies and strengthen their conclusions. Immune surveillance appears to be critical to reducing the risk for some but not all malignancies including lung cancer and melanoma, and the treatments given for CLL can cause immune suppression and thus may increase the risk.”
Moving forward, he said, “this research highlights the importance of second cancers to patients with CLL. It also highlights the need for secondary cancer screening for CLL patients, patient education to avoid known cancer risk factors including smoking and excess UV light exposure, and the need as a field to continue to invest in research into characteristics of second cancers and mitigation strategies.”
Study funding was not reported. The authors and Dr. Bond report no disclosures.
The report, which appeared in January in Blood Cancer Journal, found that patients diagnosed with CLL between 1989 and 2019 were 63% more likely to were diagnosed with SPM than a matched population: standardized incidence ratio = 1.63, 95% confidence interval (CI), 1.59-1.68.
“Our results provide patients and their treating physicians with an overview of the risk of SPM development. This information can be used in treatment decision-making and for planning appropriate surveillance activities and interventions,” study lead author Lina van der Straten, MD, PhD, of the Albert Schweitzer Hospital and Erasmus University Medical Center in the Netherlands, said in an interview.
Ohio State University hematologist David Bond, MD, who’s familiar with the findings, said in an interview that “it’s been well-established that patients with CLL are at increased risk for second primary malignancies. This is thought to be due to impaired immune surveillance and possibly carcinogenic effects of CLL treatments.” It’s not clear, he said, “whether the rate of second cancers differs between chemoimmunotherapy-treated patients and those receiving newer oral kinase inhibitors.”
Previous research into CLL and SPM has been sparse, Dr. van der Straten said, and most studies haven’t looked at SPM over time and taken into account the widespread use of chemoimmunotherapy and agents such as ibrutinib and venetoclax.
It’s important to study this topic, she said, since “cancers diagnosed after the CLL diagnosis can outweigh the improved longevity and contribute to excess morbidity and mortality in long-term CLL survivors.”
With the help of the Netherlands Cancer Registry, researchers tracked 24,815 patients with CLL who were diagnosed over the 20-year period; 4,369 developed SPM. “We demonstrated that the risk of SPM development was higher than in the general population with an excess of 125 malignancies per 10,000 person-years in the CLL cohort,” Dr. van der Straten said. “The risk of SPM development was found to be heightened in solid and hematological cancers. Patients with CLL had an increased risk of developing cancers at the following sites or types: skin, acute myeloid leukemia, soft-tissue sarcomas, thyroid, kidney, unknown primary localization, non-Hodgkin lymphomas, lung and bronchus, and colon and rectum.”
Specifically, the study reports that “elevated risk was observed for solid (SIR = 1.67; 95% CI, 1.65-1.75) and hematological SPMs (SIR = 1.42; 95% CI, 1.24-1.62). The highest risk for SPMs was noted beyond 5 years post diagnosis (SIR = 1.70; 95% CI, 1.62-1.77), for male individuals (SIR = 1.70; 95% CI, 1.64-1.77), and patients aged 18-69 years (SR = 1.92; 95% CI, 1.79-2.05).
“Patients with CLL exposed to treatment have a higher risk of SPM development than patients who will never receive therapy,” Dr. van der Straten said. Research has shown that “treatment with fludarabine, cyclophosphamide, and rituximab has been associated with a 2.38 increased risk for SPM development, particularly acute myeloid leukemia. Indeed, we found an increased risk for hematological malignancies in patients diagnosed between 2003-2009 and 2010-2019, which might be explained by the broader administration of fludarabine-based strategies in these calendar periods.”
Multiple factors could explain the higher risk of SPM in patients with CLL, including “a dysregulated immune system, treatment-related effects, and surveillance bias,” Dr. van der Straten said. “In addition, it is proposed that the immune dysfunctional nature of CLL might enhance the effect of common carcinogens, such as UV exposure and smoking, in increasing the probability of skin and respiratory cancers.”
She added that “the risk and the spectrum of SPMs were comparable for the 2003-2009 and 2010-2019 periods, suggesting that both the introduction of chemoimmunotherapy and, in part, targeted therapies did not dramatically alter the SPM landscape. However, due to the short follow-up period for the small cohort of patients receiving targeted therapies, further research is warranted.”
Dr. Bond said the findings “are largely in line with prior studies and strengthen their conclusions. Immune surveillance appears to be critical to reducing the risk for some but not all malignancies including lung cancer and melanoma, and the treatments given for CLL can cause immune suppression and thus may increase the risk.”
Moving forward, he said, “this research highlights the importance of second cancers to patients with CLL. It also highlights the need for secondary cancer screening for CLL patients, patient education to avoid known cancer risk factors including smoking and excess UV light exposure, and the need as a field to continue to invest in research into characteristics of second cancers and mitigation strategies.”
Study funding was not reported. The authors and Dr. Bond report no disclosures.
FROM BLOOD CANCER JOURNAL
Despite limits, COVID vaccines protect CLL patients
These findings don’t reveal whether the T-cell boost actually provides extra protection against COVID-19. Still, the study suggests that patients with CLL should be vaccinated no matter which medications they’re taking, coauthor and hematologist/oncologist Clemens-Martin Wendtner, MD, of the Munich (Germany) Clinic, said in an interview.
“Do not defer or pause treatment,” said Dr. Wendtner, whose study was published in Blood Advances.
Patients with CLL appear to have among the weakest responses to the COVID-19 vaccine among people with various types of blood cancer. A meta-analysis published in 2022 found that seropositivity rates following vaccination were just 51% in patients with CLL, compared with 80%-90% in those with acute leukemia and 76%-80% of those with myeloma.
“Usually, the response rate to vaccination among the nonimmunocompromised would be 95%,” Dr. Wendtner said.
Research has also suggested that patients treated with B-cell pathway inhibitors and anti-CD20 antibodies are especially likely to have poorer responses to COVID-19 vaccines, no surprise considering that their job is to dampen the immune system. But there’s an unanswered question, according to Dr. Wendtner: Does “just measuring B-cell response tell us everything about the immune response?”
The new prospective, single-institution study aims to answer that question in patients who each received two types of vaccines. Researchers compared peripheral blood mononuclear cell transcriptional response with antibody and T-cell response rates in 15 patients with CLL/small lymphocytic lymphoma following vaccination with both the Pfizer-BioNTech and AstraZeneca vaccines.
The average antibody response was limited. “Overall, 7/15 of patients failed to mount a humoral response even after three-dose vaccination,” the researchers reported. All of the patients were “heavily pretreated” with CLL medications such as venetoclax, an anti-CD20 monoclonal antibody.
By contrast, the T-cell response was much stronger: 80% of patients (12/15) had a robust response, a number that grew to 90% (14/15) after a booster. This response is “almost ideal” considering that the response in a nonimmunocompromised person would be about 99%, Dr. Wendtner said.
The study also revealed that vaccine responses were weaker in patients who took a combination of a Bruton tyrosine kinase inhibitor and venetoclax within a year.
Four patients developed COVID-19 infections with the Omicron variant about 6 months after vaccination. All had mild symptoms. A lone patient had a history of COVID-19 infection prior to vaccination.
The researchers noted that the study had several limitations, including its small size, its reliance on a single institution, and the differences in treatments and vaccination protocols among the patient population.
Broadly speaking, the study showed that “a vaccine is not in vain” in patients with CLL, “although the doctor might not detect an antibody response,” Dr. Wendtner said. He added that mixing vaccine types should provide more protection. Start with a viral vector vaccine followed by an mRNA vaccine or vice versa, he suggested.
In an interview, infectious disease physician Joshua A. Hill, MD, from Fred Hutchinson Cancer Center, Seattle, who wasn’t involved with the study, said it makes “important and interesting observations to reinforce other studies with similar findings.”
Specifically, Dr. Hill said, “despite the absence of a robust antibody response some of these patients who are on active treatment, patients can still generate robust cellular immune responses in the form of T-cell immunity. Our understanding is that having T cell immunity will provide important additional protection for developing severe disease, although is less easily tested.”
As for the best vaccination strategies, Dr. Hill said “patients should get vaccinated as soon as they are eligible, according to standard guidelines. If patients have not yet started therapy, they should get their indicated vaccines before starting treatment whenever possible.”
The German study was funded by the National Institute of Diabetes and Digestive and Kidney Diseases and the Bavarian State Ministry of Science and Art. Dr. Wendtner disclosed consultant fees from AstraZeneca and BioNTech, and another author disclosed consultant fees from AstraZeneca. The other authors reported no disclosures. Dr. Hill disclosed consultant fees from Moderna, Pfizer, and Gilead.
These findings don’t reveal whether the T-cell boost actually provides extra protection against COVID-19. Still, the study suggests that patients with CLL should be vaccinated no matter which medications they’re taking, coauthor and hematologist/oncologist Clemens-Martin Wendtner, MD, of the Munich (Germany) Clinic, said in an interview.
“Do not defer or pause treatment,” said Dr. Wendtner, whose study was published in Blood Advances.
Patients with CLL appear to have among the weakest responses to the COVID-19 vaccine among people with various types of blood cancer. A meta-analysis published in 2022 found that seropositivity rates following vaccination were just 51% in patients with CLL, compared with 80%-90% in those with acute leukemia and 76%-80% of those with myeloma.
“Usually, the response rate to vaccination among the nonimmunocompromised would be 95%,” Dr. Wendtner said.
Research has also suggested that patients treated with B-cell pathway inhibitors and anti-CD20 antibodies are especially likely to have poorer responses to COVID-19 vaccines, no surprise considering that their job is to dampen the immune system. But there’s an unanswered question, according to Dr. Wendtner: Does “just measuring B-cell response tell us everything about the immune response?”
The new prospective, single-institution study aims to answer that question in patients who each received two types of vaccines. Researchers compared peripheral blood mononuclear cell transcriptional response with antibody and T-cell response rates in 15 patients with CLL/small lymphocytic lymphoma following vaccination with both the Pfizer-BioNTech and AstraZeneca vaccines.
The average antibody response was limited. “Overall, 7/15 of patients failed to mount a humoral response even after three-dose vaccination,” the researchers reported. All of the patients were “heavily pretreated” with CLL medications such as venetoclax, an anti-CD20 monoclonal antibody.
By contrast, the T-cell response was much stronger: 80% of patients (12/15) had a robust response, a number that grew to 90% (14/15) after a booster. This response is “almost ideal” considering that the response in a nonimmunocompromised person would be about 99%, Dr. Wendtner said.
The study also revealed that vaccine responses were weaker in patients who took a combination of a Bruton tyrosine kinase inhibitor and venetoclax within a year.
Four patients developed COVID-19 infections with the Omicron variant about 6 months after vaccination. All had mild symptoms. A lone patient had a history of COVID-19 infection prior to vaccination.
The researchers noted that the study had several limitations, including its small size, its reliance on a single institution, and the differences in treatments and vaccination protocols among the patient population.
Broadly speaking, the study showed that “a vaccine is not in vain” in patients with CLL, “although the doctor might not detect an antibody response,” Dr. Wendtner said. He added that mixing vaccine types should provide more protection. Start with a viral vector vaccine followed by an mRNA vaccine or vice versa, he suggested.
In an interview, infectious disease physician Joshua A. Hill, MD, from Fred Hutchinson Cancer Center, Seattle, who wasn’t involved with the study, said it makes “important and interesting observations to reinforce other studies with similar findings.”
Specifically, Dr. Hill said, “despite the absence of a robust antibody response some of these patients who are on active treatment, patients can still generate robust cellular immune responses in the form of T-cell immunity. Our understanding is that having T cell immunity will provide important additional protection for developing severe disease, although is less easily tested.”
As for the best vaccination strategies, Dr. Hill said “patients should get vaccinated as soon as they are eligible, according to standard guidelines. If patients have not yet started therapy, they should get their indicated vaccines before starting treatment whenever possible.”
The German study was funded by the National Institute of Diabetes and Digestive and Kidney Diseases and the Bavarian State Ministry of Science and Art. Dr. Wendtner disclosed consultant fees from AstraZeneca and BioNTech, and another author disclosed consultant fees from AstraZeneca. The other authors reported no disclosures. Dr. Hill disclosed consultant fees from Moderna, Pfizer, and Gilead.
These findings don’t reveal whether the T-cell boost actually provides extra protection against COVID-19. Still, the study suggests that patients with CLL should be vaccinated no matter which medications they’re taking, coauthor and hematologist/oncologist Clemens-Martin Wendtner, MD, of the Munich (Germany) Clinic, said in an interview.
“Do not defer or pause treatment,” said Dr. Wendtner, whose study was published in Blood Advances.
Patients with CLL appear to have among the weakest responses to the COVID-19 vaccine among people with various types of blood cancer. A meta-analysis published in 2022 found that seropositivity rates following vaccination were just 51% in patients with CLL, compared with 80%-90% in those with acute leukemia and 76%-80% of those with myeloma.
“Usually, the response rate to vaccination among the nonimmunocompromised would be 95%,” Dr. Wendtner said.
Research has also suggested that patients treated with B-cell pathway inhibitors and anti-CD20 antibodies are especially likely to have poorer responses to COVID-19 vaccines, no surprise considering that their job is to dampen the immune system. But there’s an unanswered question, according to Dr. Wendtner: Does “just measuring B-cell response tell us everything about the immune response?”
The new prospective, single-institution study aims to answer that question in patients who each received two types of vaccines. Researchers compared peripheral blood mononuclear cell transcriptional response with antibody and T-cell response rates in 15 patients with CLL/small lymphocytic lymphoma following vaccination with both the Pfizer-BioNTech and AstraZeneca vaccines.
The average antibody response was limited. “Overall, 7/15 of patients failed to mount a humoral response even after three-dose vaccination,” the researchers reported. All of the patients were “heavily pretreated” with CLL medications such as venetoclax, an anti-CD20 monoclonal antibody.
By contrast, the T-cell response was much stronger: 80% of patients (12/15) had a robust response, a number that grew to 90% (14/15) after a booster. This response is “almost ideal” considering that the response in a nonimmunocompromised person would be about 99%, Dr. Wendtner said.
The study also revealed that vaccine responses were weaker in patients who took a combination of a Bruton tyrosine kinase inhibitor and venetoclax within a year.
Four patients developed COVID-19 infections with the Omicron variant about 6 months after vaccination. All had mild symptoms. A lone patient had a history of COVID-19 infection prior to vaccination.
The researchers noted that the study had several limitations, including its small size, its reliance on a single institution, and the differences in treatments and vaccination protocols among the patient population.
Broadly speaking, the study showed that “a vaccine is not in vain” in patients with CLL, “although the doctor might not detect an antibody response,” Dr. Wendtner said. He added that mixing vaccine types should provide more protection. Start with a viral vector vaccine followed by an mRNA vaccine or vice versa, he suggested.
In an interview, infectious disease physician Joshua A. Hill, MD, from Fred Hutchinson Cancer Center, Seattle, who wasn’t involved with the study, said it makes “important and interesting observations to reinforce other studies with similar findings.”
Specifically, Dr. Hill said, “despite the absence of a robust antibody response some of these patients who are on active treatment, patients can still generate robust cellular immune responses in the form of T-cell immunity. Our understanding is that having T cell immunity will provide important additional protection for developing severe disease, although is less easily tested.”
As for the best vaccination strategies, Dr. Hill said “patients should get vaccinated as soon as they are eligible, according to standard guidelines. If patients have not yet started therapy, they should get their indicated vaccines before starting treatment whenever possible.”
The German study was funded by the National Institute of Diabetes and Digestive and Kidney Diseases and the Bavarian State Ministry of Science and Art. Dr. Wendtner disclosed consultant fees from AstraZeneca and BioNTech, and another author disclosed consultant fees from AstraZeneca. The other authors reported no disclosures. Dr. Hill disclosed consultant fees from Moderna, Pfizer, and Gilead.
FROM BLOOD ADVANCES
Adding venetoclax improves ibrutinib outcomes in CLL
Investigators led by Philip Thompson, MD, a hematologist/oncologist at the center, explained that CLL patients receiving ibrutinib, a Bruton’s kinase inhibitor, “rarely achieve complete remission with undetectable measurable residual disease,” so they stay on the costly treatment indefinitely or until disease progression or accumulating adverse events force a switch to venetoclax.
Using the two agents together, instead of consecutively, may allow strong responders to stop treatment altogether and suboptimal responders to have longer remissions, they said.
“We would not advocate prolonged Bruton’s kinase inhibitor use prior to starting venetoclax in treatment-naive patients, as the safety and efficacy of commencing venetoclax after a 3-month ibrutinib monotherapy phase has been repeatedly demonstrated,” the team said.
However, the investigators noted that their “study was not intended to directly answer the question of whether combination therapy is superior to the current paradigm of sequential monotherapy.” Randomized trials are looking into the matter. The study was published recently as a preprint on ResearchSquare.com and has not been peer reviewed.
Complete remission in over half
The 45 adult subjects had one or more high-risk features for CLL progression and had received at least 1 year of ibrutinib at 140-420 mg once daily, depending on tolerance. They had bone marrow detectable disease at study entry but did not meet criteria for progression. Median duration of ibrutinib at baseline was 32 months, and about half the subjects were on it as their initial therapy.
Venetoclax, a BCL2 inhibitor with a completely different mechanisms of action, was added to ibrutinib for up to 2 years, escalated up to a target dose of 400 mg once daily.
On intention-to-treat analysis, venetoclax add-on improved ibrutinib response to complete remission in 55% of patients; complete remission was defined as less than 1 CLL cell per 10,000 leukocytes in bone marrow on two consecutive occasions 6 months apart.
The rate of undetectable bone marrow disease was 57% after 1 year of combined treatment and 71% after venetoclax completion, at which point 23 patients with undetectable disease stopped ibrutinib along with venetoclax.
Five patients had disease progression at a median of 41 months after venetoclax initiation, one during combined therapy, three during ibrutinib maintenance afterward, and one with Richter transformation after complete remission and discontinuation of all treatment. No patient had died from CLL.
“There has so far been no significant difference noted in” time to residual disease re-emergence, the team said, based on whether or not patients continued ibrutinib after venetoclax add-on.
There was no significant difference in the rate of bone marrow clearance according to the presence or absence of TP53 abnormalities, complex karyotypes, or prior treatment status.
The most common grade 3/4 adverse event was neutropenia in 20% of patients. Nine patients developed nonmelanoma skin cancer during the trial; six were diagnosed with other solid tumors; three came down with grade 3 infections, and two developed myelodysplastic syndrome, both with a prior history of chemotherapy.
No one stopped venetoclax because of toxicity, but about a third of subjects required dose reductions, most often because of neutropenia.
The study was funded by AbbVie, which is commercializing venetoclax along with Genentech. Investigators disclosed ties to both companies and many others. Dr. Thompson disclosed ties to AbbVie, Pharmacyclics, Lilly, Adaptive Biotechnologies, Janssen, Beigene, and Genentech.
Investigators led by Philip Thompson, MD, a hematologist/oncologist at the center, explained that CLL patients receiving ibrutinib, a Bruton’s kinase inhibitor, “rarely achieve complete remission with undetectable measurable residual disease,” so they stay on the costly treatment indefinitely or until disease progression or accumulating adverse events force a switch to venetoclax.
Using the two agents together, instead of consecutively, may allow strong responders to stop treatment altogether and suboptimal responders to have longer remissions, they said.
“We would not advocate prolonged Bruton’s kinase inhibitor use prior to starting venetoclax in treatment-naive patients, as the safety and efficacy of commencing venetoclax after a 3-month ibrutinib monotherapy phase has been repeatedly demonstrated,” the team said.
However, the investigators noted that their “study was not intended to directly answer the question of whether combination therapy is superior to the current paradigm of sequential monotherapy.” Randomized trials are looking into the matter. The study was published recently as a preprint on ResearchSquare.com and has not been peer reviewed.
Complete remission in over half
The 45 adult subjects had one or more high-risk features for CLL progression and had received at least 1 year of ibrutinib at 140-420 mg once daily, depending on tolerance. They had bone marrow detectable disease at study entry but did not meet criteria for progression. Median duration of ibrutinib at baseline was 32 months, and about half the subjects were on it as their initial therapy.
Venetoclax, a BCL2 inhibitor with a completely different mechanisms of action, was added to ibrutinib for up to 2 years, escalated up to a target dose of 400 mg once daily.
On intention-to-treat analysis, venetoclax add-on improved ibrutinib response to complete remission in 55% of patients; complete remission was defined as less than 1 CLL cell per 10,000 leukocytes in bone marrow on two consecutive occasions 6 months apart.
The rate of undetectable bone marrow disease was 57% after 1 year of combined treatment and 71% after venetoclax completion, at which point 23 patients with undetectable disease stopped ibrutinib along with venetoclax.
Five patients had disease progression at a median of 41 months after venetoclax initiation, one during combined therapy, three during ibrutinib maintenance afterward, and one with Richter transformation after complete remission and discontinuation of all treatment. No patient had died from CLL.
“There has so far been no significant difference noted in” time to residual disease re-emergence, the team said, based on whether or not patients continued ibrutinib after venetoclax add-on.
There was no significant difference in the rate of bone marrow clearance according to the presence or absence of TP53 abnormalities, complex karyotypes, or prior treatment status.
The most common grade 3/4 adverse event was neutropenia in 20% of patients. Nine patients developed nonmelanoma skin cancer during the trial; six were diagnosed with other solid tumors; three came down with grade 3 infections, and two developed myelodysplastic syndrome, both with a prior history of chemotherapy.
No one stopped venetoclax because of toxicity, but about a third of subjects required dose reductions, most often because of neutropenia.
The study was funded by AbbVie, which is commercializing venetoclax along with Genentech. Investigators disclosed ties to both companies and many others. Dr. Thompson disclosed ties to AbbVie, Pharmacyclics, Lilly, Adaptive Biotechnologies, Janssen, Beigene, and Genentech.
Investigators led by Philip Thompson, MD, a hematologist/oncologist at the center, explained that CLL patients receiving ibrutinib, a Bruton’s kinase inhibitor, “rarely achieve complete remission with undetectable measurable residual disease,” so they stay on the costly treatment indefinitely or until disease progression or accumulating adverse events force a switch to venetoclax.
Using the two agents together, instead of consecutively, may allow strong responders to stop treatment altogether and suboptimal responders to have longer remissions, they said.
“We would not advocate prolonged Bruton’s kinase inhibitor use prior to starting venetoclax in treatment-naive patients, as the safety and efficacy of commencing venetoclax after a 3-month ibrutinib monotherapy phase has been repeatedly demonstrated,” the team said.
However, the investigators noted that their “study was not intended to directly answer the question of whether combination therapy is superior to the current paradigm of sequential monotherapy.” Randomized trials are looking into the matter. The study was published recently as a preprint on ResearchSquare.com and has not been peer reviewed.
Complete remission in over half
The 45 adult subjects had one or more high-risk features for CLL progression and had received at least 1 year of ibrutinib at 140-420 mg once daily, depending on tolerance. They had bone marrow detectable disease at study entry but did not meet criteria for progression. Median duration of ibrutinib at baseline was 32 months, and about half the subjects were on it as their initial therapy.
Venetoclax, a BCL2 inhibitor with a completely different mechanisms of action, was added to ibrutinib for up to 2 years, escalated up to a target dose of 400 mg once daily.
On intention-to-treat analysis, venetoclax add-on improved ibrutinib response to complete remission in 55% of patients; complete remission was defined as less than 1 CLL cell per 10,000 leukocytes in bone marrow on two consecutive occasions 6 months apart.
The rate of undetectable bone marrow disease was 57% after 1 year of combined treatment and 71% after venetoclax completion, at which point 23 patients with undetectable disease stopped ibrutinib along with venetoclax.
Five patients had disease progression at a median of 41 months after venetoclax initiation, one during combined therapy, three during ibrutinib maintenance afterward, and one with Richter transformation after complete remission and discontinuation of all treatment. No patient had died from CLL.
“There has so far been no significant difference noted in” time to residual disease re-emergence, the team said, based on whether or not patients continued ibrutinib after venetoclax add-on.
There was no significant difference in the rate of bone marrow clearance according to the presence or absence of TP53 abnormalities, complex karyotypes, or prior treatment status.
The most common grade 3/4 adverse event was neutropenia in 20% of patients. Nine patients developed nonmelanoma skin cancer during the trial; six were diagnosed with other solid tumors; three came down with grade 3 infections, and two developed myelodysplastic syndrome, both with a prior history of chemotherapy.
No one stopped venetoclax because of toxicity, but about a third of subjects required dose reductions, most often because of neutropenia.
The study was funded by AbbVie, which is commercializing venetoclax along with Genentech. Investigators disclosed ties to both companies and many others. Dr. Thompson disclosed ties to AbbVie, Pharmacyclics, Lilly, Adaptive Biotechnologies, Janssen, Beigene, and Genentech.
FROM RESEARCHSQUARE
FDA OKs zanubrutinib for CLL or SLL
By giving the nod to these uses of this second-generation Bruton’s tyrosine kinase inhibitor, the FDA expanded on its previous approvals of this drug in mantle cell and marginal zone lymphoma.
“We have seen striking data from the Brukinsa development program demonstrating significant and consistent efficacy across CLL patient subtypes, including the high-risk del17p/TP53-mutated population, and regardless of treatment setting,” Jennifer R. Brown, MD, PhD, of Dana-Farber Cancer Institute in Boston, said in a press release from drug developer BeiGene.
The FDA’s decision was based on two phase 3 trials – SEQUOIA and ALPINE. The SEQUOIA trial assessed 479 patients with treatment-naive CLL/SLL who either received zanubrutinib until disease progression or unacceptable toxicity or bendamustine plus rituximab for six cycles. Median progression-free survival was not reached in the zanubrutinib arm and was 33.7 months in the bendamustine plus rituximab arm (hazard ratio, 0.42).
In a separate, nonrandomized SEQUOIA cohort, investigators assessed zanubrutinib in patients with a 17p deletion and found an overall response rate of 88%. In addition, over the 25-month follow-up, the median duration of response was not reached.
The ALPINE trial included 652 patients with relapsed or refractory CLL/SLL who received either zanubrutinib or ibrutinib. The overall response rate was 80% in the zanubrutinib arm versus 73% in the ibrutinib arm, and the median duration of response was not reached in either arm over the 14-month follow-up period. Median progression-free survival was not reached in the zanubrutinib arm and was 35 months in the ibrutinib group.
Dr. Brown, a lead investigator on both drug trials, suggested that, given the improvements observed in progression-free survival, zanubrutinib could become the standard of care in this setting.
In the ALPINE trial, treatment discontinuation rate was lower among patients receiving zanubrutinib (26%) versus ibrutinib (41.2%), with most discontinuations a result of adverse events or progressive disease.
And across both trials, the most common adverse reactions were decreased neutrophil count (42%), upper respiratory tract infection (39%), decreased platelet count (34%), hemorrhage (30%), and musculoskeletal pain (30%).
A version of this article first appeared on Medscape.com.
By giving the nod to these uses of this second-generation Bruton’s tyrosine kinase inhibitor, the FDA expanded on its previous approvals of this drug in mantle cell and marginal zone lymphoma.
“We have seen striking data from the Brukinsa development program demonstrating significant and consistent efficacy across CLL patient subtypes, including the high-risk del17p/TP53-mutated population, and regardless of treatment setting,” Jennifer R. Brown, MD, PhD, of Dana-Farber Cancer Institute in Boston, said in a press release from drug developer BeiGene.
The FDA’s decision was based on two phase 3 trials – SEQUOIA and ALPINE. The SEQUOIA trial assessed 479 patients with treatment-naive CLL/SLL who either received zanubrutinib until disease progression or unacceptable toxicity or bendamustine plus rituximab for six cycles. Median progression-free survival was not reached in the zanubrutinib arm and was 33.7 months in the bendamustine plus rituximab arm (hazard ratio, 0.42).
In a separate, nonrandomized SEQUOIA cohort, investigators assessed zanubrutinib in patients with a 17p deletion and found an overall response rate of 88%. In addition, over the 25-month follow-up, the median duration of response was not reached.
The ALPINE trial included 652 patients with relapsed or refractory CLL/SLL who received either zanubrutinib or ibrutinib. The overall response rate was 80% in the zanubrutinib arm versus 73% in the ibrutinib arm, and the median duration of response was not reached in either arm over the 14-month follow-up period. Median progression-free survival was not reached in the zanubrutinib arm and was 35 months in the ibrutinib group.
Dr. Brown, a lead investigator on both drug trials, suggested that, given the improvements observed in progression-free survival, zanubrutinib could become the standard of care in this setting.
In the ALPINE trial, treatment discontinuation rate was lower among patients receiving zanubrutinib (26%) versus ibrutinib (41.2%), with most discontinuations a result of adverse events or progressive disease.
And across both trials, the most common adverse reactions were decreased neutrophil count (42%), upper respiratory tract infection (39%), decreased platelet count (34%), hemorrhage (30%), and musculoskeletal pain (30%).
A version of this article first appeared on Medscape.com.
By giving the nod to these uses of this second-generation Bruton’s tyrosine kinase inhibitor, the FDA expanded on its previous approvals of this drug in mantle cell and marginal zone lymphoma.
“We have seen striking data from the Brukinsa development program demonstrating significant and consistent efficacy across CLL patient subtypes, including the high-risk del17p/TP53-mutated population, and regardless of treatment setting,” Jennifer R. Brown, MD, PhD, of Dana-Farber Cancer Institute in Boston, said in a press release from drug developer BeiGene.
The FDA’s decision was based on two phase 3 trials – SEQUOIA and ALPINE. The SEQUOIA trial assessed 479 patients with treatment-naive CLL/SLL who either received zanubrutinib until disease progression or unacceptable toxicity or bendamustine plus rituximab for six cycles. Median progression-free survival was not reached in the zanubrutinib arm and was 33.7 months in the bendamustine plus rituximab arm (hazard ratio, 0.42).
In a separate, nonrandomized SEQUOIA cohort, investigators assessed zanubrutinib in patients with a 17p deletion and found an overall response rate of 88%. In addition, over the 25-month follow-up, the median duration of response was not reached.
The ALPINE trial included 652 patients with relapsed or refractory CLL/SLL who received either zanubrutinib or ibrutinib. The overall response rate was 80% in the zanubrutinib arm versus 73% in the ibrutinib arm, and the median duration of response was not reached in either arm over the 14-month follow-up period. Median progression-free survival was not reached in the zanubrutinib arm and was 35 months in the ibrutinib group.
Dr. Brown, a lead investigator on both drug trials, suggested that, given the improvements observed in progression-free survival, zanubrutinib could become the standard of care in this setting.
In the ALPINE trial, treatment discontinuation rate was lower among patients receiving zanubrutinib (26%) versus ibrutinib (41.2%), with most discontinuations a result of adverse events or progressive disease.
And across both trials, the most common adverse reactions were decreased neutrophil count (42%), upper respiratory tract infection (39%), decreased platelet count (34%), hemorrhage (30%), and musculoskeletal pain (30%).
A version of this article first appeared on Medscape.com.
CLL phase 3 study: Zanubrutinib bests ibrutinib
Progression-free survival (PFS) was significantly higher for zanubrutinib versus ibrutinib, according to investigator Jennifer R. Brown, MD, PhD, director of the Center for Chronic Lymphocytic Leukemia at Dana-Farber Cancer Institute, Boston.
Cardiac safety was also better with zanubrutinib, the second-generation Bruton’s tyrosine kinase inhibitor, compared to ibrutinib, the first-in-class Bruton’s tyrosine kinase inhibitor. Dr. Brown noted that ibrutinib has “transformed CLL therapy,” despite toxicity and pharmacokinetics issues which limit its use.
Even in patients with high-risk CLL, there was a clear benefit of zanubrutinib over ibrutinib, according to Dr. Brown, who presented final results of ALPINE in a late-breaking clinical trials session at the annual meeting of the American Society of Hematology.
“I am not aware of a patient population in which I would select ibrutinib as compared to zanubrutinib,” Dr. Brown said in a press briefing on the study at the meeting.
Although not currently indicated in CLL, zanubrutinib received Food and Drug Administration approval for treatment of relapsed/refractory mantle cell lymphoma in late 2019, followed by indications in Waldenström’s macroglobulinemia and relapsed/refractory marginal zone lymphoma in 2021.
But the choice of zanubrutinib over ibrutinib in relapsed/refractory CLL is already supported in current clinical practice guidelines, Dr. Brown said.
The most recent CLL guidelines from the National Comprehensive Cancer Network (NCCN), updated Aug 30, describe zanubrutinib as a “preferred” regimen, while ibrutinib falls into the category of an “other recommended regimen.”
The zanubrutinib recommendation is category 1, meaning that it is based on high-level evidence, with uniform consensus that the intervention in appropriate, according to NCCN.
Improved safety, efficacy
Side effects have proved to be an Achilles heel for ibrutinib, which first received an FDA approval in CLL in 2014.
Across CLL studies, between 16% and 23% of CLL patients have discontinued ibrutinib treatment because of toxicities, Dr. Brown, the ALPINE investigator, said at the ASH meeting.
In addition, pharmacokinetic data suggest that at certain times between doses, the amount of ibrutinib in a patient’s system may drop below the level needed to effectively inhibit the target protein, Bruton’s tyrosine kinase.
By contrast, zanubrutinib is designed to have greater specificity for that target protein, Dr. Brown said. Furthermore, the pharmacokinetic studies have demonstrated concentrations of drug consistently above the level needed for effective inhibition – an effect that suggests potential for greater efficacy.
In the ALPINE study, 652 patients with relapsed/refractory CLL/small lymphocytic lymphoma (SLL) were randomized to zanubrutinib 160 mg twice daily or ibrutinib once daily.
With a mean follow-up of 29.6 months, zanubrutinib PFS was significantly superior to ibrutinib, according to Dr. Brown, with a hazard ratio (HR) of 0.65 and 95% confidence interval (CI) between 0.49 and 0.86.
Estimated PFS at 2 years was 79.5% in the zanubrutinib arm and 67.3% for ibrutinib, according to the ALPINE data presented.
However, the difference in PFS in favor of zanubrutinib was even more pronounced in high-risk patients, according to Dr. Brown. Among patients with chromosome 17 deletion or TP53 mutation, the PFS at 2 years was 77.6% for zanubrutinib and just 55.7% for ibrutinib, with an HR of 0.52 and 95% CI of 0.30 to 0.88.
Zanubrutinib’s safety profile was superior to ibrutinib, with serious adverse rates of 42.0% and 50.0%, respectively, and significantly lower cardiac toxicity for zanubrutinib, according to the investigators’ presentation.
Only 5.2% of patients on zanubrutinib had atrial fibrillation/flutter on study, compared to 13.3% for ibrutinib (P = .0004), while rates of serious cardiac adverse events were 1.9% and 7.7% , respectively.
Impressive benefit
The PFS benefit of zanubrutinib over ibrutinib was “quite impressive” in ALPINE, and in line with pharmacokinetic differences observed between Bruton’s tyrosine kinase inhibitors, said Stefan K. Barta, MD, associate professor of medicine at the University of Pennsylvania in Philadelphia.
“In the lab, [second-generation Bruton’s tyrosine kinase inhibitors] do hit the target better, but better doesn’t necessarily translate into good outcomes for patients – that’s a different question,” Dr. Barta said in an interview
However, the safety findings of ALPINE are particularly relevant, according to Dr. Barta, since today, many patients with CLL will receive treatment with Bruton’s tyrosine kinase inhibitors indefinitely.
In ALPINE results presented at ASH, zanubrutinib-treated patients had lower rates of atrial fibrillation and serious cardiac events, as well as zero deaths due to cardiac events, compared to six deaths in the ibrutinib group.
“Side effects make a big difference if you are on something for a long time,” Dr. Barta said. “It’s certainly a huge difference already, but then if you get the added bonus of also having an improvement in PFS, that’s a win-win.”
Dr. Brown reported disclosures related to Abbvie, Acerta/AstraZeneca, Beigene, Bristol-Myers Squibb/Juno/Celgene, Catapult, Genentech/Roche, Janssen, MEI Pharma, Morphosys AG, Novartis, Pfizer, Rigel, Gilead, Loxo/Lilly, Verastem/Secura Bio, Sun, TG Therapeutics, Invectys, Grifols Worldwide Operations, Hutchmed, iOnctura, and Pharmacyclics.
Progression-free survival (PFS) was significantly higher for zanubrutinib versus ibrutinib, according to investigator Jennifer R. Brown, MD, PhD, director of the Center for Chronic Lymphocytic Leukemia at Dana-Farber Cancer Institute, Boston.
Cardiac safety was also better with zanubrutinib, the second-generation Bruton’s tyrosine kinase inhibitor, compared to ibrutinib, the first-in-class Bruton’s tyrosine kinase inhibitor. Dr. Brown noted that ibrutinib has “transformed CLL therapy,” despite toxicity and pharmacokinetics issues which limit its use.
Even in patients with high-risk CLL, there was a clear benefit of zanubrutinib over ibrutinib, according to Dr. Brown, who presented final results of ALPINE in a late-breaking clinical trials session at the annual meeting of the American Society of Hematology.
“I am not aware of a patient population in which I would select ibrutinib as compared to zanubrutinib,” Dr. Brown said in a press briefing on the study at the meeting.
Although not currently indicated in CLL, zanubrutinib received Food and Drug Administration approval for treatment of relapsed/refractory mantle cell lymphoma in late 2019, followed by indications in Waldenström’s macroglobulinemia and relapsed/refractory marginal zone lymphoma in 2021.
But the choice of zanubrutinib over ibrutinib in relapsed/refractory CLL is already supported in current clinical practice guidelines, Dr. Brown said.
The most recent CLL guidelines from the National Comprehensive Cancer Network (NCCN), updated Aug 30, describe zanubrutinib as a “preferred” regimen, while ibrutinib falls into the category of an “other recommended regimen.”
The zanubrutinib recommendation is category 1, meaning that it is based on high-level evidence, with uniform consensus that the intervention in appropriate, according to NCCN.
Improved safety, efficacy
Side effects have proved to be an Achilles heel for ibrutinib, which first received an FDA approval in CLL in 2014.
Across CLL studies, between 16% and 23% of CLL patients have discontinued ibrutinib treatment because of toxicities, Dr. Brown, the ALPINE investigator, said at the ASH meeting.
In addition, pharmacokinetic data suggest that at certain times between doses, the amount of ibrutinib in a patient’s system may drop below the level needed to effectively inhibit the target protein, Bruton’s tyrosine kinase.
By contrast, zanubrutinib is designed to have greater specificity for that target protein, Dr. Brown said. Furthermore, the pharmacokinetic studies have demonstrated concentrations of drug consistently above the level needed for effective inhibition – an effect that suggests potential for greater efficacy.
In the ALPINE study, 652 patients with relapsed/refractory CLL/small lymphocytic lymphoma (SLL) were randomized to zanubrutinib 160 mg twice daily or ibrutinib once daily.
With a mean follow-up of 29.6 months, zanubrutinib PFS was significantly superior to ibrutinib, according to Dr. Brown, with a hazard ratio (HR) of 0.65 and 95% confidence interval (CI) between 0.49 and 0.86.
Estimated PFS at 2 years was 79.5% in the zanubrutinib arm and 67.3% for ibrutinib, according to the ALPINE data presented.
However, the difference in PFS in favor of zanubrutinib was even more pronounced in high-risk patients, according to Dr. Brown. Among patients with chromosome 17 deletion or TP53 mutation, the PFS at 2 years was 77.6% for zanubrutinib and just 55.7% for ibrutinib, with an HR of 0.52 and 95% CI of 0.30 to 0.88.
Zanubrutinib’s safety profile was superior to ibrutinib, with serious adverse rates of 42.0% and 50.0%, respectively, and significantly lower cardiac toxicity for zanubrutinib, according to the investigators’ presentation.
Only 5.2% of patients on zanubrutinib had atrial fibrillation/flutter on study, compared to 13.3% for ibrutinib (P = .0004), while rates of serious cardiac adverse events were 1.9% and 7.7% , respectively.
Impressive benefit
The PFS benefit of zanubrutinib over ibrutinib was “quite impressive” in ALPINE, and in line with pharmacokinetic differences observed between Bruton’s tyrosine kinase inhibitors, said Stefan K. Barta, MD, associate professor of medicine at the University of Pennsylvania in Philadelphia.
“In the lab, [second-generation Bruton’s tyrosine kinase inhibitors] do hit the target better, but better doesn’t necessarily translate into good outcomes for patients – that’s a different question,” Dr. Barta said in an interview
However, the safety findings of ALPINE are particularly relevant, according to Dr. Barta, since today, many patients with CLL will receive treatment with Bruton’s tyrosine kinase inhibitors indefinitely.
In ALPINE results presented at ASH, zanubrutinib-treated patients had lower rates of atrial fibrillation and serious cardiac events, as well as zero deaths due to cardiac events, compared to six deaths in the ibrutinib group.
“Side effects make a big difference if you are on something for a long time,” Dr. Barta said. “It’s certainly a huge difference already, but then if you get the added bonus of also having an improvement in PFS, that’s a win-win.”
Dr. Brown reported disclosures related to Abbvie, Acerta/AstraZeneca, Beigene, Bristol-Myers Squibb/Juno/Celgene, Catapult, Genentech/Roche, Janssen, MEI Pharma, Morphosys AG, Novartis, Pfizer, Rigel, Gilead, Loxo/Lilly, Verastem/Secura Bio, Sun, TG Therapeutics, Invectys, Grifols Worldwide Operations, Hutchmed, iOnctura, and Pharmacyclics.
Progression-free survival (PFS) was significantly higher for zanubrutinib versus ibrutinib, according to investigator Jennifer R. Brown, MD, PhD, director of the Center for Chronic Lymphocytic Leukemia at Dana-Farber Cancer Institute, Boston.
Cardiac safety was also better with zanubrutinib, the second-generation Bruton’s tyrosine kinase inhibitor, compared to ibrutinib, the first-in-class Bruton’s tyrosine kinase inhibitor. Dr. Brown noted that ibrutinib has “transformed CLL therapy,” despite toxicity and pharmacokinetics issues which limit its use.
Even in patients with high-risk CLL, there was a clear benefit of zanubrutinib over ibrutinib, according to Dr. Brown, who presented final results of ALPINE in a late-breaking clinical trials session at the annual meeting of the American Society of Hematology.
“I am not aware of a patient population in which I would select ibrutinib as compared to zanubrutinib,” Dr. Brown said in a press briefing on the study at the meeting.
Although not currently indicated in CLL, zanubrutinib received Food and Drug Administration approval for treatment of relapsed/refractory mantle cell lymphoma in late 2019, followed by indications in Waldenström’s macroglobulinemia and relapsed/refractory marginal zone lymphoma in 2021.
But the choice of zanubrutinib over ibrutinib in relapsed/refractory CLL is already supported in current clinical practice guidelines, Dr. Brown said.
The most recent CLL guidelines from the National Comprehensive Cancer Network (NCCN), updated Aug 30, describe zanubrutinib as a “preferred” regimen, while ibrutinib falls into the category of an “other recommended regimen.”
The zanubrutinib recommendation is category 1, meaning that it is based on high-level evidence, with uniform consensus that the intervention in appropriate, according to NCCN.
Improved safety, efficacy
Side effects have proved to be an Achilles heel for ibrutinib, which first received an FDA approval in CLL in 2014.
Across CLL studies, between 16% and 23% of CLL patients have discontinued ibrutinib treatment because of toxicities, Dr. Brown, the ALPINE investigator, said at the ASH meeting.
In addition, pharmacokinetic data suggest that at certain times between doses, the amount of ibrutinib in a patient’s system may drop below the level needed to effectively inhibit the target protein, Bruton’s tyrosine kinase.
By contrast, zanubrutinib is designed to have greater specificity for that target protein, Dr. Brown said. Furthermore, the pharmacokinetic studies have demonstrated concentrations of drug consistently above the level needed for effective inhibition – an effect that suggests potential for greater efficacy.
In the ALPINE study, 652 patients with relapsed/refractory CLL/small lymphocytic lymphoma (SLL) were randomized to zanubrutinib 160 mg twice daily or ibrutinib once daily.
With a mean follow-up of 29.6 months, zanubrutinib PFS was significantly superior to ibrutinib, according to Dr. Brown, with a hazard ratio (HR) of 0.65 and 95% confidence interval (CI) between 0.49 and 0.86.
Estimated PFS at 2 years was 79.5% in the zanubrutinib arm and 67.3% for ibrutinib, according to the ALPINE data presented.
However, the difference in PFS in favor of zanubrutinib was even more pronounced in high-risk patients, according to Dr. Brown. Among patients with chromosome 17 deletion or TP53 mutation, the PFS at 2 years was 77.6% for zanubrutinib and just 55.7% for ibrutinib, with an HR of 0.52 and 95% CI of 0.30 to 0.88.
Zanubrutinib’s safety profile was superior to ibrutinib, with serious adverse rates of 42.0% and 50.0%, respectively, and significantly lower cardiac toxicity for zanubrutinib, according to the investigators’ presentation.
Only 5.2% of patients on zanubrutinib had atrial fibrillation/flutter on study, compared to 13.3% for ibrutinib (P = .0004), while rates of serious cardiac adverse events were 1.9% and 7.7% , respectively.
Impressive benefit
The PFS benefit of zanubrutinib over ibrutinib was “quite impressive” in ALPINE, and in line with pharmacokinetic differences observed between Bruton’s tyrosine kinase inhibitors, said Stefan K. Barta, MD, associate professor of medicine at the University of Pennsylvania in Philadelphia.
“In the lab, [second-generation Bruton’s tyrosine kinase inhibitors] do hit the target better, but better doesn’t necessarily translate into good outcomes for patients – that’s a different question,” Dr. Barta said in an interview
However, the safety findings of ALPINE are particularly relevant, according to Dr. Barta, since today, many patients with CLL will receive treatment with Bruton’s tyrosine kinase inhibitors indefinitely.
In ALPINE results presented at ASH, zanubrutinib-treated patients had lower rates of atrial fibrillation and serious cardiac events, as well as zero deaths due to cardiac events, compared to six deaths in the ibrutinib group.
“Side effects make a big difference if you are on something for a long time,” Dr. Barta said. “It’s certainly a huge difference already, but then if you get the added bonus of also having an improvement in PFS, that’s a win-win.”
Dr. Brown reported disclosures related to Abbvie, Acerta/AstraZeneca, Beigene, Bristol-Myers Squibb/Juno/Celgene, Catapult, Genentech/Roche, Janssen, MEI Pharma, Morphosys AG, Novartis, Pfizer, Rigel, Gilead, Loxo/Lilly, Verastem/Secura Bio, Sun, TG Therapeutics, Invectys, Grifols Worldwide Operations, Hutchmed, iOnctura, and Pharmacyclics.
FROM ASH 2022
High cost and demand for old cancer drug sparks crisis
At Oregon Health and Science University, for example, an extensive algorithm now offers guidance through a thicket of alternative options, from adjusting doses and using substitutes to delaying treatment. Meanwhile, some institutions have enlisted ethicists and attorneys to guide their decisions on which patients will have to wait for potentially life-saving treatment.
Even as surgeons turn to alternatives, advocates for transplantation in hematology have warned about the potential for harm.
“This continued fludarabine shortage is forcing centers to use non–[Food and Drug Administration] approved lymphodepleting regimens that may negatively impact the success of a possibly lifesaving CAR-T therapy,” Brenda Sandmaier, MD, president of the Transplantation and Cellular Therapy American Society, and Jeffery Auletta, MD, a senior vice president with the National Marrow Donor, said in a June 30 letter to the FDA. The physicians added that they “request the FDA to take immediate action on this critical shortage. Many centers currently have no ability to purchase fludarabine through their suppliers and have no estimated time frame for return of availability. Other centers are limited to mere weeks of supply, with continued uncertainty of future availability.”
In October, less than 4 months after that letter was sent, one of the manufacturers of fludarabine – Areva Pharmaceuticals – marked up the price of fludarabine to $2,736 per vial, 10-20 times that of two other makers of the drug.
In new treatment era, fludarabine remains crucial
In 2015, ASH Clinical News – a publication of the American Society of Hematology – invited a pair of hematologists to discuss whether fludarabine is “dead” as a front-line treatment for chronic lymphocytic leukemia (CLL). “Fludarabine is not dead yet, but the data from those and other long-term trials may be the final nail in its coffin,” said Mitchell Smith, MD, PhD, who was then with Cleveland Clinic and now works for George Washington University.
Seven years later, the role of fludarabine as a long-term chemotherapeutic agent in blood cancer has definitely evolved. Just as oncologists predicted back in 2015, “the use of fludarabine declined for the primary management of CLL and other B cell malignancies, due to the development of targeted therapies such as BTK inhibitors, venetoclax, and other agents,” Memorial Sloan Kettering hematologic oncologist Anthony Mato, MD, said in an interview.
But the drug “remains a critical agent for conditioning the immune system for cellular therapies such as allogeneic stem cell transplantation and CAR-T cells,” Dr. Mato said.
Nirav Shah, MD, a hematologic oncologist at the Medical College of Wisconsin, explained in an interview that “conditioning” in the stem-cell transplant context refers to “wiping out” the immune system, allowing the donor’s stem cells to avoid rejection. “It’s a commonly used drug,” he said, “and shortage was not really a concern that people faced until this year.”
As shortage continues, price hike brings yet another hit
The first reports of fludarabine being in short supply surfaced about a year ago. According to a Nov. 2 update from the American Society of Health-System Pharmacists, five companies now manufacture fludarabine, and all of them report shortages. Areva, which dramatically raised its price, is accepting direct orders. Leucadia and Teva don’t know when the drug will be available; and Fresenius Kabi and Sagent expect availability in early 2023.
Areva, Leucadia, and Teva didn’t provide reasons for their shortages. Fresenius Kabi blamed increased demand, and Sagent pointed to manufacturing delays. Pfizer, another manufacturer, had a tiny market share and stopped making fludarabine in 2020, according to the pharmacist society.
In a May 12 press release, a company called Lannett announced it would take over U.S. distribution of fludarabine for Areva and suggested that the supply shortage would be lucrative: “While total U.S. sales for the 12 months ended March 2022 of Fludarabine Phosphate for injection, USP, 50 mg/2mL were approximately $4.9 million, according to IQVIA, the current market value is believed to be higher due to the recent market disruptions.”
“We were all shocked and outraged when Areva came out with the new, dramatically higher prices,” Bill Greene, PharmD, chief pharmaceutical officer at St. Jude Children’s Research Hospital, said in a recent interview.
In a prior interview, conducted during the summer of 2022, Dr. Greene addressed the topic of hematologic drug shortages. Back then he noted that he was seeking emergency supplies of fludarabine, since all five manufacturers reported having no stock available.
Interviewed again in November 2022, Dr. Greene noted that the hospital “had been able to stay ahead of the need and meet the needs of our patients” through arrangements with Teva and Fresenius Kabi. “In cases of patient need, we certainly are willing to pay a higher product price if that’s what it takes to get it – assuming the product is a quality product.”
The Medical College of Wisconsin’s Dr. Shah said insurers may refuse to cover the higher price, sticking medical institutions with the bill.
Alternatives abound, but do they suffice?
There is some good news on the fludarabine shortage front. Areva recently alerted providers that it was releasing fludarabine from non-FDA-approved suppliers with the agency’s permission, and Accord Healthcare said it received permission to sell fludarabine that was marketed in Canada.
Another option – oral fludarabine instead of the standard IV version – remains unavailable in the United States. According to the June letter to the FDA from the American Society for Transplantation and Cellular Therapy and National Marrow Donor Program, it “might be an appropriate alternative” and is available in Europe, Canada and Australia.
The letter warns that “transplant centers have also been forced to move away from fludarabine-based regimens and use alternative drugs such as cladribine or clofarabine, which are both significantly less studied and rely on single-center experience or limited phase II data. ... The limited availability of fludarabine is leading to the use of alternative regimens that are known to be more toxic or understudied alternatives with unknown long-term clinical effects or harms to patients.”
In a November 2022 report published in Transplantation and Cellular Therapy, Dr. Shah and colleagues noted that institutions are adopting strategies such as “(1) pharmacy dose banding and rounding down to save vials, even if a >5% reduction was required; (2) administering all dosing of fludarabine based not on actual body weight but on adjusted body weight; and (3) switching the billing of fludarabine from single-dose vials to billing by dose delivery.”
If the shortage continues, “it becomes necessary for centers to establish algorithms for management now,” they wrote. “Substitution of such agents as bendamustine and cladribine can be considered ... [and] another acceptable solution could be the substitution of clofarabine for fludarabine.”
Still, there are many unanswered questions. “The challenge is that these alternative regimens have not been extensively studied in a large population,” Dr. Shah said. “You have to be more mindful of potential side effects and risks, and the biggest concern is efficacy. Is changing the drug going to be detrimental to a patient’s outcome? To be honest, we don’t know the answer to that.”
Dr. Mato disclosed ties with TG Therapeutics, Pharmacyclics, AbbVie, Acerta, Adaptive Biotechnologies, AstraZeneca, BeiGene, BioPharma, BMS, Curio, Dava, DTRM, Genentech, Genmab, Janssen, Johnson & Johnson, LOXO, Medscape, Nurix, Octapharma, PER, PerView, and Pfizer. Dr. Greene and Dr. Shah have no disclosures.
At Oregon Health and Science University, for example, an extensive algorithm now offers guidance through a thicket of alternative options, from adjusting doses and using substitutes to delaying treatment. Meanwhile, some institutions have enlisted ethicists and attorneys to guide their decisions on which patients will have to wait for potentially life-saving treatment.
Even as surgeons turn to alternatives, advocates for transplantation in hematology have warned about the potential for harm.
“This continued fludarabine shortage is forcing centers to use non–[Food and Drug Administration] approved lymphodepleting regimens that may negatively impact the success of a possibly lifesaving CAR-T therapy,” Brenda Sandmaier, MD, president of the Transplantation and Cellular Therapy American Society, and Jeffery Auletta, MD, a senior vice president with the National Marrow Donor, said in a June 30 letter to the FDA. The physicians added that they “request the FDA to take immediate action on this critical shortage. Many centers currently have no ability to purchase fludarabine through their suppliers and have no estimated time frame for return of availability. Other centers are limited to mere weeks of supply, with continued uncertainty of future availability.”
In October, less than 4 months after that letter was sent, one of the manufacturers of fludarabine – Areva Pharmaceuticals – marked up the price of fludarabine to $2,736 per vial, 10-20 times that of two other makers of the drug.
In new treatment era, fludarabine remains crucial
In 2015, ASH Clinical News – a publication of the American Society of Hematology – invited a pair of hematologists to discuss whether fludarabine is “dead” as a front-line treatment for chronic lymphocytic leukemia (CLL). “Fludarabine is not dead yet, but the data from those and other long-term trials may be the final nail in its coffin,” said Mitchell Smith, MD, PhD, who was then with Cleveland Clinic and now works for George Washington University.
Seven years later, the role of fludarabine as a long-term chemotherapeutic agent in blood cancer has definitely evolved. Just as oncologists predicted back in 2015, “the use of fludarabine declined for the primary management of CLL and other B cell malignancies, due to the development of targeted therapies such as BTK inhibitors, venetoclax, and other agents,” Memorial Sloan Kettering hematologic oncologist Anthony Mato, MD, said in an interview.
But the drug “remains a critical agent for conditioning the immune system for cellular therapies such as allogeneic stem cell transplantation and CAR-T cells,” Dr. Mato said.
Nirav Shah, MD, a hematologic oncologist at the Medical College of Wisconsin, explained in an interview that “conditioning” in the stem-cell transplant context refers to “wiping out” the immune system, allowing the donor’s stem cells to avoid rejection. “It’s a commonly used drug,” he said, “and shortage was not really a concern that people faced until this year.”
As shortage continues, price hike brings yet another hit
The first reports of fludarabine being in short supply surfaced about a year ago. According to a Nov. 2 update from the American Society of Health-System Pharmacists, five companies now manufacture fludarabine, and all of them report shortages. Areva, which dramatically raised its price, is accepting direct orders. Leucadia and Teva don’t know when the drug will be available; and Fresenius Kabi and Sagent expect availability in early 2023.
Areva, Leucadia, and Teva didn’t provide reasons for their shortages. Fresenius Kabi blamed increased demand, and Sagent pointed to manufacturing delays. Pfizer, another manufacturer, had a tiny market share and stopped making fludarabine in 2020, according to the pharmacist society.
In a May 12 press release, a company called Lannett announced it would take over U.S. distribution of fludarabine for Areva and suggested that the supply shortage would be lucrative: “While total U.S. sales for the 12 months ended March 2022 of Fludarabine Phosphate for injection, USP, 50 mg/2mL were approximately $4.9 million, according to IQVIA, the current market value is believed to be higher due to the recent market disruptions.”
“We were all shocked and outraged when Areva came out with the new, dramatically higher prices,” Bill Greene, PharmD, chief pharmaceutical officer at St. Jude Children’s Research Hospital, said in a recent interview.
In a prior interview, conducted during the summer of 2022, Dr. Greene addressed the topic of hematologic drug shortages. Back then he noted that he was seeking emergency supplies of fludarabine, since all five manufacturers reported having no stock available.
Interviewed again in November 2022, Dr. Greene noted that the hospital “had been able to stay ahead of the need and meet the needs of our patients” through arrangements with Teva and Fresenius Kabi. “In cases of patient need, we certainly are willing to pay a higher product price if that’s what it takes to get it – assuming the product is a quality product.”
The Medical College of Wisconsin’s Dr. Shah said insurers may refuse to cover the higher price, sticking medical institutions with the bill.
Alternatives abound, but do they suffice?
There is some good news on the fludarabine shortage front. Areva recently alerted providers that it was releasing fludarabine from non-FDA-approved suppliers with the agency’s permission, and Accord Healthcare said it received permission to sell fludarabine that was marketed in Canada.
Another option – oral fludarabine instead of the standard IV version – remains unavailable in the United States. According to the June letter to the FDA from the American Society for Transplantation and Cellular Therapy and National Marrow Donor Program, it “might be an appropriate alternative” and is available in Europe, Canada and Australia.
The letter warns that “transplant centers have also been forced to move away from fludarabine-based regimens and use alternative drugs such as cladribine or clofarabine, which are both significantly less studied and rely on single-center experience or limited phase II data. ... The limited availability of fludarabine is leading to the use of alternative regimens that are known to be more toxic or understudied alternatives with unknown long-term clinical effects or harms to patients.”
In a November 2022 report published in Transplantation and Cellular Therapy, Dr. Shah and colleagues noted that institutions are adopting strategies such as “(1) pharmacy dose banding and rounding down to save vials, even if a >5% reduction was required; (2) administering all dosing of fludarabine based not on actual body weight but on adjusted body weight; and (3) switching the billing of fludarabine from single-dose vials to billing by dose delivery.”
If the shortage continues, “it becomes necessary for centers to establish algorithms for management now,” they wrote. “Substitution of such agents as bendamustine and cladribine can be considered ... [and] another acceptable solution could be the substitution of clofarabine for fludarabine.”
Still, there are many unanswered questions. “The challenge is that these alternative regimens have not been extensively studied in a large population,” Dr. Shah said. “You have to be more mindful of potential side effects and risks, and the biggest concern is efficacy. Is changing the drug going to be detrimental to a patient’s outcome? To be honest, we don’t know the answer to that.”
Dr. Mato disclosed ties with TG Therapeutics, Pharmacyclics, AbbVie, Acerta, Adaptive Biotechnologies, AstraZeneca, BeiGene, BioPharma, BMS, Curio, Dava, DTRM, Genentech, Genmab, Janssen, Johnson & Johnson, LOXO, Medscape, Nurix, Octapharma, PER, PerView, and Pfizer. Dr. Greene and Dr. Shah have no disclosures.
At Oregon Health and Science University, for example, an extensive algorithm now offers guidance through a thicket of alternative options, from adjusting doses and using substitutes to delaying treatment. Meanwhile, some institutions have enlisted ethicists and attorneys to guide their decisions on which patients will have to wait for potentially life-saving treatment.
Even as surgeons turn to alternatives, advocates for transplantation in hematology have warned about the potential for harm.
“This continued fludarabine shortage is forcing centers to use non–[Food and Drug Administration] approved lymphodepleting regimens that may negatively impact the success of a possibly lifesaving CAR-T therapy,” Brenda Sandmaier, MD, president of the Transplantation and Cellular Therapy American Society, and Jeffery Auletta, MD, a senior vice president with the National Marrow Donor, said in a June 30 letter to the FDA. The physicians added that they “request the FDA to take immediate action on this critical shortage. Many centers currently have no ability to purchase fludarabine through their suppliers and have no estimated time frame for return of availability. Other centers are limited to mere weeks of supply, with continued uncertainty of future availability.”
In October, less than 4 months after that letter was sent, one of the manufacturers of fludarabine – Areva Pharmaceuticals – marked up the price of fludarabine to $2,736 per vial, 10-20 times that of two other makers of the drug.
In new treatment era, fludarabine remains crucial
In 2015, ASH Clinical News – a publication of the American Society of Hematology – invited a pair of hematologists to discuss whether fludarabine is “dead” as a front-line treatment for chronic lymphocytic leukemia (CLL). “Fludarabine is not dead yet, but the data from those and other long-term trials may be the final nail in its coffin,” said Mitchell Smith, MD, PhD, who was then with Cleveland Clinic and now works for George Washington University.
Seven years later, the role of fludarabine as a long-term chemotherapeutic agent in blood cancer has definitely evolved. Just as oncologists predicted back in 2015, “the use of fludarabine declined for the primary management of CLL and other B cell malignancies, due to the development of targeted therapies such as BTK inhibitors, venetoclax, and other agents,” Memorial Sloan Kettering hematologic oncologist Anthony Mato, MD, said in an interview.
But the drug “remains a critical agent for conditioning the immune system for cellular therapies such as allogeneic stem cell transplantation and CAR-T cells,” Dr. Mato said.
Nirav Shah, MD, a hematologic oncologist at the Medical College of Wisconsin, explained in an interview that “conditioning” in the stem-cell transplant context refers to “wiping out” the immune system, allowing the donor’s stem cells to avoid rejection. “It’s a commonly used drug,” he said, “and shortage was not really a concern that people faced until this year.”
As shortage continues, price hike brings yet another hit
The first reports of fludarabine being in short supply surfaced about a year ago. According to a Nov. 2 update from the American Society of Health-System Pharmacists, five companies now manufacture fludarabine, and all of them report shortages. Areva, which dramatically raised its price, is accepting direct orders. Leucadia and Teva don’t know when the drug will be available; and Fresenius Kabi and Sagent expect availability in early 2023.
Areva, Leucadia, and Teva didn’t provide reasons for their shortages. Fresenius Kabi blamed increased demand, and Sagent pointed to manufacturing delays. Pfizer, another manufacturer, had a tiny market share and stopped making fludarabine in 2020, according to the pharmacist society.
In a May 12 press release, a company called Lannett announced it would take over U.S. distribution of fludarabine for Areva and suggested that the supply shortage would be lucrative: “While total U.S. sales for the 12 months ended March 2022 of Fludarabine Phosphate for injection, USP, 50 mg/2mL were approximately $4.9 million, according to IQVIA, the current market value is believed to be higher due to the recent market disruptions.”
“We were all shocked and outraged when Areva came out with the new, dramatically higher prices,” Bill Greene, PharmD, chief pharmaceutical officer at St. Jude Children’s Research Hospital, said in a recent interview.
In a prior interview, conducted during the summer of 2022, Dr. Greene addressed the topic of hematologic drug shortages. Back then he noted that he was seeking emergency supplies of fludarabine, since all five manufacturers reported having no stock available.
Interviewed again in November 2022, Dr. Greene noted that the hospital “had been able to stay ahead of the need and meet the needs of our patients” through arrangements with Teva and Fresenius Kabi. “In cases of patient need, we certainly are willing to pay a higher product price if that’s what it takes to get it – assuming the product is a quality product.”
The Medical College of Wisconsin’s Dr. Shah said insurers may refuse to cover the higher price, sticking medical institutions with the bill.
Alternatives abound, but do they suffice?
There is some good news on the fludarabine shortage front. Areva recently alerted providers that it was releasing fludarabine from non-FDA-approved suppliers with the agency’s permission, and Accord Healthcare said it received permission to sell fludarabine that was marketed in Canada.
Another option – oral fludarabine instead of the standard IV version – remains unavailable in the United States. According to the June letter to the FDA from the American Society for Transplantation and Cellular Therapy and National Marrow Donor Program, it “might be an appropriate alternative” and is available in Europe, Canada and Australia.
The letter warns that “transplant centers have also been forced to move away from fludarabine-based regimens and use alternative drugs such as cladribine or clofarabine, which are both significantly less studied and rely on single-center experience or limited phase II data. ... The limited availability of fludarabine is leading to the use of alternative regimens that are known to be more toxic or understudied alternatives with unknown long-term clinical effects or harms to patients.”
In a November 2022 report published in Transplantation and Cellular Therapy, Dr. Shah and colleagues noted that institutions are adopting strategies such as “(1) pharmacy dose banding and rounding down to save vials, even if a >5% reduction was required; (2) administering all dosing of fludarabine based not on actual body weight but on adjusted body weight; and (3) switching the billing of fludarabine from single-dose vials to billing by dose delivery.”
If the shortage continues, “it becomes necessary for centers to establish algorithms for management now,” they wrote. “Substitution of such agents as bendamustine and cladribine can be considered ... [and] another acceptable solution could be the substitution of clofarabine for fludarabine.”
Still, there are many unanswered questions. “The challenge is that these alternative regimens have not been extensively studied in a large population,” Dr. Shah said. “You have to be more mindful of potential side effects and risks, and the biggest concern is efficacy. Is changing the drug going to be detrimental to a patient’s outcome? To be honest, we don’t know the answer to that.”
Dr. Mato disclosed ties with TG Therapeutics, Pharmacyclics, AbbVie, Acerta, Adaptive Biotechnologies, AstraZeneca, BeiGene, BioPharma, BMS, Curio, Dava, DTRM, Genentech, Genmab, Janssen, Johnson & Johnson, LOXO, Medscape, Nurix, Octapharma, PER, PerView, and Pfizer. Dr. Greene and Dr. Shah have no disclosures.
FDA approved acalabrutinib tablet for MCL, CLL, SLL
These include adult patients with chronic lymphocytic leukemia, small lymphocytic lymphoma, and relapsed or refractory mantle cell lymphoma.
Approval of the tablet formulation of the selective Bruton tyrosine kinase inhibitor was based on the ELEVATE-PLUS trials, which showed bioequivalence with the capsule. The tablet had the same efficacy and safety profile with the same dosing strength and schedule, AstraZeneca said in a press release.
The benefit of the tablet formulation is that patients with acid reflux and other problems can take it with proton pump inhibitors, antacids, and H2-receptor antagonists, the company noted.
A version of this article first appeared on Medscape.com.
These include adult patients with chronic lymphocytic leukemia, small lymphocytic lymphoma, and relapsed or refractory mantle cell lymphoma.
Approval of the tablet formulation of the selective Bruton tyrosine kinase inhibitor was based on the ELEVATE-PLUS trials, which showed bioequivalence with the capsule. The tablet had the same efficacy and safety profile with the same dosing strength and schedule, AstraZeneca said in a press release.
The benefit of the tablet formulation is that patients with acid reflux and other problems can take it with proton pump inhibitors, antacids, and H2-receptor antagonists, the company noted.
A version of this article first appeared on Medscape.com.
These include adult patients with chronic lymphocytic leukemia, small lymphocytic lymphoma, and relapsed or refractory mantle cell lymphoma.
Approval of the tablet formulation of the selective Bruton tyrosine kinase inhibitor was based on the ELEVATE-PLUS trials, which showed bioequivalence with the capsule. The tablet had the same efficacy and safety profile with the same dosing strength and schedule, AstraZeneca said in a press release.
The benefit of the tablet formulation is that patients with acid reflux and other problems can take it with proton pump inhibitors, antacids, and H2-receptor antagonists, the company noted.
A version of this article first appeared on Medscape.com.
CAR T-cell therapy neurotoxicity linked to NfL elevations
“This is the first study to show NfL levels are elevated even before CAR T treatment is given,” first author Omar H. Butt, MD, PhD, of the Siteman Cancer Center at Barnes-Jewish Hospital and Washington University in St. Louis, said in an interview.
“While unlikely to be the sole driver of [the neurotoxicity], neural injury reflected by NfL may aid in identifying a high-risk subset of patients undergoing cellular therapy,” the authors concluded in the study, published in JAMA Oncology.
CAR T-cell therapy has gained favor for virtually revolutionizing the treatment of some leukemias and lymphomas, however, as many as 40%-60% of patients develop the neurotoxicity side effect, called immune effector cell–associated neurotoxicity syndrome (ICANS), which, though usually low grade, in more severe cases can cause substantial morbidity and even mortality.
Hence, “the early identification of patients at risk for ICANS is critical for preemptive management,” the authors noted.
NfL, an established marker of neuroaxonal injury in neurodegenerative diseases including multiple sclerosis and Alzheimer’s disease, has been shown in previous studies to be elevated following the development of ICANS and up to 5 days prior to its peak symptoms.
To further evaluate NfL elevations in relation to ICANS, Dr. Butt and colleagues identified 30 patients undergoing CD19 CART-cell therapy, including 77% for diffuse large B-cell lymphoma, at two U.S. centers: Washington University in St. Louis and Case Western Reserve University, Cleveland.
The patients had a median age of 64 and were 40% female.
Among them, four developed low-grade ICANS grade 1-2, and 7 developed ICANS grade 3 or higher.
Of those developing any-grade ICANS, baseline elevations of NfL prior to the CAR T-cell treatment, were significantly higher, compared with those who did not develop ICANs (mean 87.6 pg/mL vs. 29.4 pg/mL, P < .001), with no significant differences between the low-grade (1 and 2) and higher-grade (3 or higher) ICANS groups.
A receiver operating characteristic analysis showed baseline NfL levels significantly predicted the development of ICANS with high accuracy (area under the ROC curve, 0.96), as well as sensitivity (AUROC, 0.91) and specificity (AUROC, 0.95).
Notably, baseline NfL levels were associated with ICANS severity, but did not correlate with other factors including demographic, oncologic history, nononcologic neurologic history, or history of exposure to neurotoxic therapies.
However, Dr. Butt added, “it is important to note that our study was insufficiently powered to examine those relationships in earnest. Therefore, [a correlation between NfL and those factors] remains possible,” he said.
The elevated NfL levels observed prior to the development of ICANS remained high across the study’s seven time points, up to day 30 post infusion.
Interest in NfL levels on the rise
NfL assessment is currently only clinically validated in amyotrophic lateral sclerosis, where it is used to assess neuroaxonal health and integrity. However, testing is available as interest and evidence of NfL’s potential role in other settings grows.
Meanwhile, Dr. Butt and associates are themselves developing an assay to predict the development of ICANS, which will likely include NfL, if the role is validated in further studies.
“Future studies will explore validating NfL for ICANS and additional indications,” he said.
ICANS symptoms can range from headaches and confusion to seizures or strokes in more severe cases.
The current gold standard for treatment includes early intervention with high-dose steroids and careful monitoring, but there is reluctance to use such therapies because of concerns about their blunting the anticancer effects of the CAR T cells.
Importantly, if validated, elevations in NfL could signal the need for more precautionary measures with CAR T-cell therapy, Dr. Butt noted.
“Our data suggests patients with high NfL levels at baseline would benefit most from perhaps closer monitoring with frequent checks and possible early intervention at the first sign of symptoms, a period of time when it may be hard to distinguish ICANS from other causes of confusion, such as delirium,” he explained.
Limitations: Validation, preventive measures needed
Commenting on the study, Sattva S. Neelapu, MD, a professor and deputy chair of the department of lymphoma and myeloma at the University of Texas MD Anderson Cancer Center, Houston, agreed that the findings have potentially important implications.
“I think this is a very intriguing and novel finding that needs to be investigated further prospectively in a larger cohort and across different CAR T products in patients with lymphoma, leukemia, and myeloma,” Dr. Neelapu said in an interview.
The NfL elevations observed even before CAR T-cell therapy among those who went on to develop ICANS are notable, he added.
“This is the surprising finding in the study,” Dr. Neelapu said. “It raises the question whether neurologic injury is caused by prior therapies that these patients received or whether it is an age-related phenomenon, as we do see higher incidence and severity of ICANS in older patients or some other mechanisms.”
A key caveat, however, is that even if a risk is identified, options to prevent ICANS are currently limited, Dr. Neelapu noted.
“I think it is too early to implement this into clinical practice,” he said. In addition to needing further validation, “assessing NfL levels would be useful when there is an effective prophylactic or therapeutic strategy – both of which also need to be investigated.”
Dr. Butt and colleagues are developing a clinical assay for ICANS and reported a provisional patent pending on the use of plasma NfL as a predictive biomarker for ICANS. The study received support from the Washington University in St. Louis, the Paula and Rodger O. Riney Fund, the Daniel J. Brennan MD Fund, the Fred Simmons and Olga Mohan Fund; the National Cancer Institute, the National Multiple Sclerosis Society, and the National Institute of Neurological Disorders and Stroke. Dr. Neelapu reported conflicts of interest with numerous pharmaceutical companies.
“This is the first study to show NfL levels are elevated even before CAR T treatment is given,” first author Omar H. Butt, MD, PhD, of the Siteman Cancer Center at Barnes-Jewish Hospital and Washington University in St. Louis, said in an interview.
“While unlikely to be the sole driver of [the neurotoxicity], neural injury reflected by NfL may aid in identifying a high-risk subset of patients undergoing cellular therapy,” the authors concluded in the study, published in JAMA Oncology.
CAR T-cell therapy has gained favor for virtually revolutionizing the treatment of some leukemias and lymphomas, however, as many as 40%-60% of patients develop the neurotoxicity side effect, called immune effector cell–associated neurotoxicity syndrome (ICANS), which, though usually low grade, in more severe cases can cause substantial morbidity and even mortality.
Hence, “the early identification of patients at risk for ICANS is critical for preemptive management,” the authors noted.
NfL, an established marker of neuroaxonal injury in neurodegenerative diseases including multiple sclerosis and Alzheimer’s disease, has been shown in previous studies to be elevated following the development of ICANS and up to 5 days prior to its peak symptoms.
To further evaluate NfL elevations in relation to ICANS, Dr. Butt and colleagues identified 30 patients undergoing CD19 CART-cell therapy, including 77% for diffuse large B-cell lymphoma, at two U.S. centers: Washington University in St. Louis and Case Western Reserve University, Cleveland.
The patients had a median age of 64 and were 40% female.
Among them, four developed low-grade ICANS grade 1-2, and 7 developed ICANS grade 3 or higher.
Of those developing any-grade ICANS, baseline elevations of NfL prior to the CAR T-cell treatment, were significantly higher, compared with those who did not develop ICANs (mean 87.6 pg/mL vs. 29.4 pg/mL, P < .001), with no significant differences between the low-grade (1 and 2) and higher-grade (3 or higher) ICANS groups.
A receiver operating characteristic analysis showed baseline NfL levels significantly predicted the development of ICANS with high accuracy (area under the ROC curve, 0.96), as well as sensitivity (AUROC, 0.91) and specificity (AUROC, 0.95).
Notably, baseline NfL levels were associated with ICANS severity, but did not correlate with other factors including demographic, oncologic history, nononcologic neurologic history, or history of exposure to neurotoxic therapies.
However, Dr. Butt added, “it is important to note that our study was insufficiently powered to examine those relationships in earnest. Therefore, [a correlation between NfL and those factors] remains possible,” he said.
The elevated NfL levels observed prior to the development of ICANS remained high across the study’s seven time points, up to day 30 post infusion.
Interest in NfL levels on the rise
NfL assessment is currently only clinically validated in amyotrophic lateral sclerosis, where it is used to assess neuroaxonal health and integrity. However, testing is available as interest and evidence of NfL’s potential role in other settings grows.
Meanwhile, Dr. Butt and associates are themselves developing an assay to predict the development of ICANS, which will likely include NfL, if the role is validated in further studies.
“Future studies will explore validating NfL for ICANS and additional indications,” he said.
ICANS symptoms can range from headaches and confusion to seizures or strokes in more severe cases.
The current gold standard for treatment includes early intervention with high-dose steroids and careful monitoring, but there is reluctance to use such therapies because of concerns about their blunting the anticancer effects of the CAR T cells.
Importantly, if validated, elevations in NfL could signal the need for more precautionary measures with CAR T-cell therapy, Dr. Butt noted.
“Our data suggests patients with high NfL levels at baseline would benefit most from perhaps closer monitoring with frequent checks and possible early intervention at the first sign of symptoms, a period of time when it may be hard to distinguish ICANS from other causes of confusion, such as delirium,” he explained.
Limitations: Validation, preventive measures needed
Commenting on the study, Sattva S. Neelapu, MD, a professor and deputy chair of the department of lymphoma and myeloma at the University of Texas MD Anderson Cancer Center, Houston, agreed that the findings have potentially important implications.
“I think this is a very intriguing and novel finding that needs to be investigated further prospectively in a larger cohort and across different CAR T products in patients with lymphoma, leukemia, and myeloma,” Dr. Neelapu said in an interview.
The NfL elevations observed even before CAR T-cell therapy among those who went on to develop ICANS are notable, he added.
“This is the surprising finding in the study,” Dr. Neelapu said. “It raises the question whether neurologic injury is caused by prior therapies that these patients received or whether it is an age-related phenomenon, as we do see higher incidence and severity of ICANS in older patients or some other mechanisms.”
A key caveat, however, is that even if a risk is identified, options to prevent ICANS are currently limited, Dr. Neelapu noted.
“I think it is too early to implement this into clinical practice,” he said. In addition to needing further validation, “assessing NfL levels would be useful when there is an effective prophylactic or therapeutic strategy – both of which also need to be investigated.”
Dr. Butt and colleagues are developing a clinical assay for ICANS and reported a provisional patent pending on the use of plasma NfL as a predictive biomarker for ICANS. The study received support from the Washington University in St. Louis, the Paula and Rodger O. Riney Fund, the Daniel J. Brennan MD Fund, the Fred Simmons and Olga Mohan Fund; the National Cancer Institute, the National Multiple Sclerosis Society, and the National Institute of Neurological Disorders and Stroke. Dr. Neelapu reported conflicts of interest with numerous pharmaceutical companies.
“This is the first study to show NfL levels are elevated even before CAR T treatment is given,” first author Omar H. Butt, MD, PhD, of the Siteman Cancer Center at Barnes-Jewish Hospital and Washington University in St. Louis, said in an interview.
“While unlikely to be the sole driver of [the neurotoxicity], neural injury reflected by NfL may aid in identifying a high-risk subset of patients undergoing cellular therapy,” the authors concluded in the study, published in JAMA Oncology.
CAR T-cell therapy has gained favor for virtually revolutionizing the treatment of some leukemias and lymphomas, however, as many as 40%-60% of patients develop the neurotoxicity side effect, called immune effector cell–associated neurotoxicity syndrome (ICANS), which, though usually low grade, in more severe cases can cause substantial morbidity and even mortality.
Hence, “the early identification of patients at risk for ICANS is critical for preemptive management,” the authors noted.
NfL, an established marker of neuroaxonal injury in neurodegenerative diseases including multiple sclerosis and Alzheimer’s disease, has been shown in previous studies to be elevated following the development of ICANS and up to 5 days prior to its peak symptoms.
To further evaluate NfL elevations in relation to ICANS, Dr. Butt and colleagues identified 30 patients undergoing CD19 CART-cell therapy, including 77% for diffuse large B-cell lymphoma, at two U.S. centers: Washington University in St. Louis and Case Western Reserve University, Cleveland.
The patients had a median age of 64 and were 40% female.
Among them, four developed low-grade ICANS grade 1-2, and 7 developed ICANS grade 3 or higher.
Of those developing any-grade ICANS, baseline elevations of NfL prior to the CAR T-cell treatment, were significantly higher, compared with those who did not develop ICANs (mean 87.6 pg/mL vs. 29.4 pg/mL, P < .001), with no significant differences between the low-grade (1 and 2) and higher-grade (3 or higher) ICANS groups.
A receiver operating characteristic analysis showed baseline NfL levels significantly predicted the development of ICANS with high accuracy (area under the ROC curve, 0.96), as well as sensitivity (AUROC, 0.91) and specificity (AUROC, 0.95).
Notably, baseline NfL levels were associated with ICANS severity, but did not correlate with other factors including demographic, oncologic history, nononcologic neurologic history, or history of exposure to neurotoxic therapies.
However, Dr. Butt added, “it is important to note that our study was insufficiently powered to examine those relationships in earnest. Therefore, [a correlation between NfL and those factors] remains possible,” he said.
The elevated NfL levels observed prior to the development of ICANS remained high across the study’s seven time points, up to day 30 post infusion.
Interest in NfL levels on the rise
NfL assessment is currently only clinically validated in amyotrophic lateral sclerosis, where it is used to assess neuroaxonal health and integrity. However, testing is available as interest and evidence of NfL’s potential role in other settings grows.
Meanwhile, Dr. Butt and associates are themselves developing an assay to predict the development of ICANS, which will likely include NfL, if the role is validated in further studies.
“Future studies will explore validating NfL for ICANS and additional indications,” he said.
ICANS symptoms can range from headaches and confusion to seizures or strokes in more severe cases.
The current gold standard for treatment includes early intervention with high-dose steroids and careful monitoring, but there is reluctance to use such therapies because of concerns about their blunting the anticancer effects of the CAR T cells.
Importantly, if validated, elevations in NfL could signal the need for more precautionary measures with CAR T-cell therapy, Dr. Butt noted.
“Our data suggests patients with high NfL levels at baseline would benefit most from perhaps closer monitoring with frequent checks and possible early intervention at the first sign of symptoms, a period of time when it may be hard to distinguish ICANS from other causes of confusion, such as delirium,” he explained.
Limitations: Validation, preventive measures needed
Commenting on the study, Sattva S. Neelapu, MD, a professor and deputy chair of the department of lymphoma and myeloma at the University of Texas MD Anderson Cancer Center, Houston, agreed that the findings have potentially important implications.
“I think this is a very intriguing and novel finding that needs to be investigated further prospectively in a larger cohort and across different CAR T products in patients with lymphoma, leukemia, and myeloma,” Dr. Neelapu said in an interview.
The NfL elevations observed even before CAR T-cell therapy among those who went on to develop ICANS are notable, he added.
“This is the surprising finding in the study,” Dr. Neelapu said. “It raises the question whether neurologic injury is caused by prior therapies that these patients received or whether it is an age-related phenomenon, as we do see higher incidence and severity of ICANS in older patients or some other mechanisms.”
A key caveat, however, is that even if a risk is identified, options to prevent ICANS are currently limited, Dr. Neelapu noted.
“I think it is too early to implement this into clinical practice,” he said. In addition to needing further validation, “assessing NfL levels would be useful when there is an effective prophylactic or therapeutic strategy – both of which also need to be investigated.”
Dr. Butt and colleagues are developing a clinical assay for ICANS and reported a provisional patent pending on the use of plasma NfL as a predictive biomarker for ICANS. The study received support from the Washington University in St. Louis, the Paula and Rodger O. Riney Fund, the Daniel J. Brennan MD Fund, the Fred Simmons and Olga Mohan Fund; the National Cancer Institute, the National Multiple Sclerosis Society, and the National Institute of Neurological Disorders and Stroke. Dr. Neelapu reported conflicts of interest with numerous pharmaceutical companies.
FROM JAMA ONCOLOGY