Follicular Lymphoma

The China Drug Administration is reviewing the Bruton’s tyrosine kinase (BTK) inhibitor zanubrutinib for the treatment of relapsed/refractory mantle cell lymphoma (MCL).

The U.S. Food and Drug Administration recently granted the drug fast track designation for the treatment of patients with Waldenström’s macroglobulinemia.

The application in China is supported by results from a phase 2, single-arm trial of 86 patients with relapsed/refractory MCL who received 160 mg zanubrutinib orally twice daily. The overall response rate was 84%, which included 59% of patients with a complete response. At 8.3 months of follow-up, the median duration of response had not been reached, according to the drug’s sponsor BeiGene.

Zanubrutinib is being studied in several ongoing trials, including for the treatment of untreated chronic lymphocytic leukemia (CLL), for relapsed/refractory follicular lymphoma in combination with obinutuzumab, and comparing it to ibrutinib in Waldenström’s macroglobulinemia and CLL/small lymphocytic lymphoma.

[email protected]

The China Drug Administration is reviewing the Bruton’s tyrosine kinase (BTK) inhibitor zanubrutinib for the treatment of relapsed/refractory mantle cell lymphoma (MCL).

The U.S. Food and Drug Administration recently granted the drug fast track designation for the treatment of patients with Waldenström’s macroglobulinemia.

The application in China is supported by results from a phase 2, single-arm trial of 86 patients with relapsed/refractory MCL who received 160 mg zanubrutinib orally twice daily. The overall response rate was 84%, which included 59% of patients with a complete response. At 8.3 months of follow-up, the median duration of response had not been reached, according to the drug’s sponsor BeiGene.

Zanubrutinib is being studied in several ongoing trials, including for the treatment of untreated chronic lymphocytic leukemia (CLL), for relapsed/refractory follicular lymphoma in combination with obinutuzumab, and comparing it to ibrutinib in Waldenström’s macroglobulinemia and CLL/small lymphocytic lymphoma.

[email protected]

The China Drug Administration is reviewing the Bruton’s tyrosine kinase (BTK) inhibitor zanubrutinib for the treatment of relapsed/refractory mantle cell lymphoma (MCL).

The U.S. Food and Drug Administration recently granted the drug fast track designation for the treatment of patients with Waldenström’s macroglobulinemia.

The application in China is supported by results from a phase 2, single-arm trial of 86 patients with relapsed/refractory MCL who received 160 mg zanubrutinib orally twice daily. The overall response rate was 84%, which included 59% of patients with a complete response. At 8.3 months of follow-up, the median duration of response had not been reached, according to the drug’s sponsor BeiGene.

Zanubrutinib is being studied in several ongoing trials, including for the treatment of untreated chronic lymphocytic leukemia (CLL), for relapsed/refractory follicular lymphoma in combination with obinutuzumab, and comparing it to ibrutinib in Waldenström’s macroglobulinemia and CLL/small lymphocytic lymphoma.

[email protected]

Micrograph showing DLBCL

The European Commission (EC) has approved the chimeric antigen receptor (CAR) T-cell therapy axicabtagene ciloleucel (Yescarta®) to treat two types of lymphoma.

Axicabtagene ciloleucel is now approved to treat adults with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) and primary mediastinal large B-cell lymphoma (PMBCL) after two or more lines of systemic therapy.

The approval extends to all member countries of the European Union, as well as Norway, Iceland, and Liechtenstein.

The EC’s approval of axicabtagene ciloleucel is supported by data from the ZUMA-1 trial.

Results from this phase 2 trial were presented at the 2017 ASH Annual Meeting and published simultaneously in NEJM.

The trial enrolled 111 patients with relapsed/refractory B-cell lymphomas. There were 101 patients who received axicabtagene ciloleucel—77 with DLBCL, 8 with PMBCL, and 16 with transformed follicular lymphoma (TFL).

Patients received conditioning with low-dose cyclophosphamide and fludarabine, followed by axicabtagene ciloleucel.

The objective response rate (ORR) was 82% (n=83), and the complete response (CR) rate was 54% (n=55).

Among the DLBCL patients, the ORR was 82% (63/77), and the CR rate was 49% (38/77). In the patients with PMBCL or TFL, the ORR was 83% (20/24), and the CR rate was 71% (17/24).

With a median follow-up of 15.4 months, 42% of patients retained their response, and 40% retained a CR.

At 18 months, the overall survival rate was 52%. Most deaths were due to disease progression.

However, 2 patients died of adverse events related to axicabtagene ciloleucel, both cytokine release syndrome.

The most common grade 3 or higher adverse events were neutropenia (78%), anemia (43%), thrombocytopenia (38%), and febrile neutropenia (31%).

Grade 3 or higher cytokine release syndrome occurred in 13% of patients, and grade 3 or higher neurologic events occurred in 28%.

Micrograph showing DLBCL

The European Commission (EC) has approved the chimeric antigen receptor (CAR) T-cell therapy axicabtagene ciloleucel (Yescarta®) to treat two types of lymphoma.

Axicabtagene ciloleucel is now approved to treat adults with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) and primary mediastinal large B-cell lymphoma (PMBCL) after two or more lines of systemic therapy.

The approval extends to all member countries of the European Union, as well as Norway, Iceland, and Liechtenstein.

The EC’s approval of axicabtagene ciloleucel is supported by data from the ZUMA-1 trial.

Results from this phase 2 trial were presented at the 2017 ASH Annual Meeting and published simultaneously in NEJM.

The trial enrolled 111 patients with relapsed/refractory B-cell lymphomas. There were 101 patients who received axicabtagene ciloleucel—77 with DLBCL, 8 with PMBCL, and 16 with transformed follicular lymphoma (TFL).

Patients received conditioning with low-dose cyclophosphamide and fludarabine, followed by axicabtagene ciloleucel.

The objective response rate (ORR) was 82% (n=83), and the complete response (CR) rate was 54% (n=55).

Among the DLBCL patients, the ORR was 82% (63/77), and the CR rate was 49% (38/77). In the patients with PMBCL or TFL, the ORR was 83% (20/24), and the CR rate was 71% (17/24).

With a median follow-up of 15.4 months, 42% of patients retained their response, and 40% retained a CR.

At 18 months, the overall survival rate was 52%. Most deaths were due to disease progression.

However, 2 patients died of adverse events related to axicabtagene ciloleucel, both cytokine release syndrome.

The most common grade 3 or higher adverse events were neutropenia (78%), anemia (43%), thrombocytopenia (38%), and febrile neutropenia (31%).

Grade 3 or higher cytokine release syndrome occurred in 13% of patients, and grade 3 or higher neurologic events occurred in 28%.

Micrograph showing DLBCL

The European Commission (EC) has approved the chimeric antigen receptor (CAR) T-cell therapy axicabtagene ciloleucel (Yescarta®) to treat two types of lymphoma.

Axicabtagene ciloleucel is now approved to treat adults with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) and primary mediastinal large B-cell lymphoma (PMBCL) after two or more lines of systemic therapy.

The approval extends to all member countries of the European Union, as well as Norway, Iceland, and Liechtenstein.

The EC’s approval of axicabtagene ciloleucel is supported by data from the ZUMA-1 trial.

Results from this phase 2 trial were presented at the 2017 ASH Annual Meeting and published simultaneously in NEJM.

The trial enrolled 111 patients with relapsed/refractory B-cell lymphomas. There were 101 patients who received axicabtagene ciloleucel—77 with DLBCL, 8 with PMBCL, and 16 with transformed follicular lymphoma (TFL).

Patients received conditioning with low-dose cyclophosphamide and fludarabine, followed by axicabtagene ciloleucel.

The objective response rate (ORR) was 82% (n=83), and the complete response (CR) rate was 54% (n=55).

Among the DLBCL patients, the ORR was 82% (63/77), and the CR rate was 49% (38/77). In the patients with PMBCL or TFL, the ORR was 83% (20/24), and the CR rate was 71% (17/24).

With a median follow-up of 15.4 months, 42% of patients retained their response, and 40% retained a CR.

At 18 months, the overall survival rate was 52%. Most deaths were due to disease progression.

However, 2 patients died of adverse events related to axicabtagene ciloleucel, both cytokine release syndrome.

The most common grade 3 or higher adverse events were neutropenia (78%), anemia (43%), thrombocytopenia (38%), and febrile neutropenia (31%).

Grade 3 or higher cytokine release syndrome occurred in 13% of patients, and grade 3 or higher neurologic events occurred in 28%.

There were a number of landmark approvals by the US Food and Drug Administration (FDA) in 2017 for cancer therapies, among them, the approval of the first two chimeric antigen receptor (CAR) T-cell therapies for cancer: tisagenlecleucel (in August) and axicabtagene ciloluecel (in October).¹ CAR T-cells are a type of adoptive cell therapy or immunotherapy, in which the patient’s own immune cells are genetically engineered to target a tumor-associated antigen, in this case CD19. In tisagenlecleucel, CD19 proteins on B cells are targeted in the treatment of B-cell precursor acute lymphoblastic leukemia. Axicabtagene ciloluecel, the second anti-CD19 CAR T-cell therapy, was approved for the treatment of refractory, aggressive B-cell non-Hodgkin lymphoma.

Tisagenlecleucel

Tisagenlecleucel was approved for the treatment of pediatric patients up to 25 years of age with B-cell precursor acute lymphoblastic leukemia (ALL) whose disease is refractory to treatment or who have relapsed after second-line therapy or beyond.² Approval was based on the pivotal ELIANA trial, a single-arm, global phase 2 trial conducted at 25 centers worldwide during April 2015 through April 2017. Patients were eligible for enrollment if they had relapsed or refractory B-cell ALL and were at least 3 years of age at screening and no older than 21 years of age at diagnosis, had at least 5% lymphoblasts in the bone marrow at screening, had tumor expression of CD19, had adequate organ function, and a Karnofsky (adult) or Lansky (child) Performance Status of ≥50 (with the worst allowable score, 50, indicating a patient who requires considerable assistance and frequent medical care [Karnofsky] and lying around much of the day, but gets dressed; no active playing but participates in all quiet play and activities [Lansky]). Exclusion criteria included previous receipt of anti-CD19 therapy, concomitant genetic syndromes associated with bone marrow failure, previous malignancy, and/or active or latent hepatitis B or C virus (HBV/HCV) infection.

The overall remission rate (ORR) was evaluated in 75 patients who were given a single dose of tisagenlecleucel (a median weight-adjusted dose of 3.1 x 10⁶ transduced viable T cells per kg of body weight) within 14 days of completing a lymphodepleting chemotherapy regimen. The confirmed ORR after at least 3 months of follow-up, as assessed by independent central review, was 81%, which included 60% of patients in complete remission (CR) and 21% in complete remission with incomplete hematologic recovery, all of whom were negative for minimal residual disease.

The most common adverse events (AEs) associated with tisagenlecleucel treatment were cytokine release syndrome (CRS), hypogammaglobulinemia, infection, pyrexia, decreased appetite, headache, encephalopathy, hypotension, bleeding episodes, tachycardia, nausea, diarrhea, vomiting, viral infectious disorders, hypoxia, fatigue, acute kidney injury, and delirium. AEs were of grade 3/4 severity in 84% of patients.³

To combat serious safety issues, including CRS and neurologic toxicities, the FDA approved tisagenlecleucel with a Risk Evaluation and Mitigation Strategy (REMS) that, in part, requires health care providers who administer the drug to be trained in their management. It also requires the facility where treatment is administered to have immediate, onsite access to the drug tocilizumab, which was approved in conjunction with tisagenlecleucel for the treatment of patients who experience CRS.

In addition to information about the REMS, the prescribing information details warnings and precautions relating to several other common toxicities. These include hypersensitivity reactions, serious infections, prolonged cytopenias, and hypogammaglobulinemia.

Patients should be monitored for signs and symptoms of infection and treated appropriately. Viral reactivation can occur after tisagenlecleucel treatment, so patients should be screened for HBV, HCV, and human immunodeficiency virus before collection of cells.

The administration of myeloid growth factors is not recommended during the first 3 weeks after infusion or until CRS has resolved. Immunoglobulin levels should be monitored after treatment and hypogammaglobulinemia managed using infection precautions, antibiotic prophylaxis, and immunoglobulin replacement according to standard guidelines.

Patients treated with tisagenlecleucel should also be monitored for life for secondary malignancies, should not be treated with live vaccines from 2 weeks before the start of lymphodepleting chemotherapy until immune recovery after tisagenlecleucel infusion, and should be aware of the potential for neurological events to impact their ability to drive and use dangerous machinery.⁴

Tisagenlecleucel is marketed as Kymriah by Novartis Pharmaceuticals. The recommended dose is 1 infusion of 0.2-5 x 10⁶ CAR-positive viable T cells per kilogram of body weight intravenously (for patients ≤50kg) and 0.1-2.5 x 10⁸ cells/kg (for patients >50kg), administered 2-14 days after lymphodepleting chemotherapy.

Axicabtagene ciloleucel

Axicabtagene ciloleucel was approved for the treatment of adult patients with certain types of relapsed or refractory large B-cell lymphoma, including diffuse large B-cell lymphoma (DLBCL), primary mediastinal B-cell lymphoma (PMBCL), high-grade B-cell lymphoma, and DLBCL arising from follicular lymphoma.⁵ It is not indicated for the treatment of patients with primary central nervous system lymphoma.

Approval followed positive results from the phase 2 single-arm, multicenter ZUMA-1 trial.⁶ Patients were included if they were aged 18 years of age and older, had histologically confirmed aggressive B-cell non-Hodgkin lymphoma that was chemotherapy refractory, had received adequate previous therapy, had at least 1 measurable lesion, had completed radiation or systemic therapy at least 2 weeks before, had resolved toxicities related to previous therapy, and had an Eastern Cooperative Oncology Group Performance Status of 0 (asymptomatic) or 1 (symptomatic), an absolute neutrophil count of ≥1000/µL, a platelet count of ≥50,000/µL, and adequate hepatic, renal and cardiac function. They were treated with a single infusion of axicabtagene ciloleucel after lymphodepleting chemotherapy.

Patients who had received previous CD19-targeted therapy, who had concomitant genetic syndromes associated with bone marrow failure, who had previous malignancy, and who had active or latent HBV/HCV infection were among those excluded from the study.

Patients were enrolled in 2 cohorts; those with DLBCL (n = 77) and those with PMBCL or transformed follicular lymphoma (n = 24). The primary endpoint was objective response rate, and after a primary analysis at a minimum of 6 months follow-up, the objective response rate was 82%, with a CR rate of 52%. Among patients who achieved CR, the median duration of response was not reached after a median follow-up of 7.9 months.

A subsequent updated analysis was performed when 108 patients had been followed for a minimum of 1 year. The objective response rate was 82%, and the CR rate was 58%, with some patients having CR in the absence of additional therapies as late as 15 months after treatment. At this updated analysis, 42% of patients continued to have a response, 40% of whom remained in CR.

The most common grade 3 or higher AEs included febrile neutropenia, fever, CRS, encephalopathy, infections, hypotension, and hypoxia. Serious AEs occurred in 52% of patients and included CRS, neurologic toxicity, prolonged cytopenias, and serious infections. Grade 3 or higher CRS or neurologic toxicities occurred in 13% and 28% of patients, respectively. Three patients died during treatment.

To mitigate the risk of CRS and neurologic toxicity, axicabtagene ciloleucel is approved with an REMS that requires appropriate certification and training before hospitals are cleared to administer the therapy.

Other warnings and precautions in the prescribing information relate to serious infections (monitor for signs and symptoms and treat appropriately), prolonged cytopenias (monitor blood counts), hypogammaglobulinemia (monitor immunoglobulin levels and manage appropriately), secondary malignancies (life-long monitoring), and the potential effects of neurologic events on a patient’s ability to drive and operate dangerous machinery (avoid for at least 8 weeks after infusion).⁷

Axicabtagene ciloleucel is marketed as Yescarta by Kite Pharma Inc. The recommended dose is a single intravenous infusion with a target of 2 x 10⁶ CAR-positive viable T cells per kilogram of body weight, preceded by fludarabine and cyclophosphamide lymphodepleting chemotherapy.

There were a number of landmark approvals by the US Food and Drug Administration (FDA) in 2017 for cancer therapies, among them, the approval of the first two chimeric antigen receptor (CAR) T-cell therapies for cancer: tisagenlecleucel (in August) and axicabtagene ciloluecel (in October).¹ CAR T-cells are a type of adoptive cell therapy or immunotherapy, in which the patient’s own immune cells are genetically engineered to target a tumor-associated antigen, in this case CD19. In tisagenlecleucel, CD19 proteins on B cells are targeted in the treatment of B-cell precursor acute lymphoblastic leukemia. Axicabtagene ciloluecel, the second anti-CD19 CAR T-cell therapy, was approved for the treatment of refractory, aggressive B-cell non-Hodgkin lymphoma.

Tisagenlecleucel

Tisagenlecleucel was approved for the treatment of pediatric patients up to 25 years of age with B-cell precursor acute lymphoblastic leukemia (ALL) whose disease is refractory to treatment or who have relapsed after second-line therapy or beyond.² Approval was based on the pivotal ELIANA trial, a single-arm, global phase 2 trial conducted at 25 centers worldwide during April 2015 through April 2017. Patients were eligible for enrollment if they had relapsed or refractory B-cell ALL and were at least 3 years of age at screening and no older than 21 years of age at diagnosis, had at least 5% lymphoblasts in the bone marrow at screening, had tumor expression of CD19, had adequate organ function, and a Karnofsky (adult) or Lansky (child) Performance Status of ≥50 (with the worst allowable score, 50, indicating a patient who requires considerable assistance and frequent medical care [Karnofsky] and lying around much of the day, but gets dressed; no active playing but participates in all quiet play and activities [Lansky]). Exclusion criteria included previous receipt of anti-CD19 therapy, concomitant genetic syndromes associated with bone marrow failure, previous malignancy, and/or active or latent hepatitis B or C virus (HBV/HCV) infection.

The overall remission rate (ORR) was evaluated in 75 patients who were given a single dose of tisagenlecleucel (a median weight-adjusted dose of 3.1 x 10⁶ transduced viable T cells per kg of body weight) within 14 days of completing a lymphodepleting chemotherapy regimen. The confirmed ORR after at least 3 months of follow-up, as assessed by independent central review, was 81%, which included 60% of patients in complete remission (CR) and 21% in complete remission with incomplete hematologic recovery, all of whom were negative for minimal residual disease.

The most common adverse events (AEs) associated with tisagenlecleucel treatment were cytokine release syndrome (CRS), hypogammaglobulinemia, infection, pyrexia, decreased appetite, headache, encephalopathy, hypotension, bleeding episodes, tachycardia, nausea, diarrhea, vomiting, viral infectious disorders, hypoxia, fatigue, acute kidney injury, and delirium. AEs were of grade 3/4 severity in 84% of patients.³

To combat serious safety issues, including CRS and neurologic toxicities, the FDA approved tisagenlecleucel with a Risk Evaluation and Mitigation Strategy (REMS) that, in part, requires health care providers who administer the drug to be trained in their management. It also requires the facility where treatment is administered to have immediate, onsite access to the drug tocilizumab, which was approved in conjunction with tisagenlecleucel for the treatment of patients who experience CRS.

In addition to information about the REMS, the prescribing information details warnings and precautions relating to several other common toxicities. These include hypersensitivity reactions, serious infections, prolonged cytopenias, and hypogammaglobulinemia.

Patients should be monitored for signs and symptoms of infection and treated appropriately. Viral reactivation can occur after tisagenlecleucel treatment, so patients should be screened for HBV, HCV, and human immunodeficiency virus before collection of cells.

The administration of myeloid growth factors is not recommended during the first 3 weeks after infusion or until CRS has resolved. Immunoglobulin levels should be monitored after treatment and hypogammaglobulinemia managed using infection precautions, antibiotic prophylaxis, and immunoglobulin replacement according to standard guidelines.

Patients treated with tisagenlecleucel should also be monitored for life for secondary malignancies, should not be treated with live vaccines from 2 weeks before the start of lymphodepleting chemotherapy until immune recovery after tisagenlecleucel infusion, and should be aware of the potential for neurological events to impact their ability to drive and use dangerous machinery.⁴

Tisagenlecleucel is marketed as Kymriah by Novartis Pharmaceuticals. The recommended dose is 1 infusion of 0.2-5 x 10⁶ CAR-positive viable T cells per kilogram of body weight intravenously (for patients ≤50kg) and 0.1-2.5 x 10⁸ cells/kg (for patients >50kg), administered 2-14 days after lymphodepleting chemotherapy.

Axicabtagene ciloleucel

Axicabtagene ciloleucel was approved for the treatment of adult patients with certain types of relapsed or refractory large B-cell lymphoma, including diffuse large B-cell lymphoma (DLBCL), primary mediastinal B-cell lymphoma (PMBCL), high-grade B-cell lymphoma, and DLBCL arising from follicular lymphoma.⁵ It is not indicated for the treatment of patients with primary central nervous system lymphoma.

Approval followed positive results from the phase 2 single-arm, multicenter ZUMA-1 trial.⁶ Patients were included if they were aged 18 years of age and older, had histologically confirmed aggressive B-cell non-Hodgkin lymphoma that was chemotherapy refractory, had received adequate previous therapy, had at least 1 measurable lesion, had completed radiation or systemic therapy at least 2 weeks before, had resolved toxicities related to previous therapy, and had an Eastern Cooperative Oncology Group Performance Status of 0 (asymptomatic) or 1 (symptomatic), an absolute neutrophil count of ≥1000/µL, a platelet count of ≥50,000/µL, and adequate hepatic, renal and cardiac function. They were treated with a single infusion of axicabtagene ciloleucel after lymphodepleting chemotherapy.

Patients who had received previous CD19-targeted therapy, who had concomitant genetic syndromes associated with bone marrow failure, who had previous malignancy, and who had active or latent HBV/HCV infection were among those excluded from the study.

Patients were enrolled in 2 cohorts; those with DLBCL (n = 77) and those with PMBCL or transformed follicular lymphoma (n = 24). The primary endpoint was objective response rate, and after a primary analysis at a minimum of 6 months follow-up, the objective response rate was 82%, with a CR rate of 52%. Among patients who achieved CR, the median duration of response was not reached after a median follow-up of 7.9 months.

A subsequent updated analysis was performed when 108 patients had been followed for a minimum of 1 year. The objective response rate was 82%, and the CR rate was 58%, with some patients having CR in the absence of additional therapies as late as 15 months after treatment. At this updated analysis, 42% of patients continued to have a response, 40% of whom remained in CR.

The most common grade 3 or higher AEs included febrile neutropenia, fever, CRS, encephalopathy, infections, hypotension, and hypoxia. Serious AEs occurred in 52% of patients and included CRS, neurologic toxicity, prolonged cytopenias, and serious infections. Grade 3 or higher CRS or neurologic toxicities occurred in 13% and 28% of patients, respectively. Three patients died during treatment.

To mitigate the risk of CRS and neurologic toxicity, axicabtagene ciloleucel is approved with an REMS that requires appropriate certification and training before hospitals are cleared to administer the therapy.

Other warnings and precautions in the prescribing information relate to serious infections (monitor for signs and symptoms and treat appropriately), prolonged cytopenias (monitor blood counts), hypogammaglobulinemia (monitor immunoglobulin levels and manage appropriately), secondary malignancies (life-long monitoring), and the potential effects of neurologic events on a patient’s ability to drive and operate dangerous machinery (avoid for at least 8 weeks after infusion).⁷

Axicabtagene ciloleucel is marketed as Yescarta by Kite Pharma Inc. The recommended dose is a single intravenous infusion with a target of 2 x 10⁶ CAR-positive viable T cells per kilogram of body weight, preceded by fludarabine and cyclophosphamide lymphodepleting chemotherapy.

There were a number of landmark approvals by the US Food and Drug Administration (FDA) in 2017 for cancer therapies, among them, the approval of the first two chimeric antigen receptor (CAR) T-cell therapies for cancer: tisagenlecleucel (in August) and axicabtagene ciloluecel (in October).¹ CAR T-cells are a type of adoptive cell therapy or immunotherapy, in which the patient’s own immune cells are genetically engineered to target a tumor-associated antigen, in this case CD19. In tisagenlecleucel, CD19 proteins on B cells are targeted in the treatment of B-cell precursor acute lymphoblastic leukemia. Axicabtagene ciloluecel, the second anti-CD19 CAR T-cell therapy, was approved for the treatment of refractory, aggressive B-cell non-Hodgkin lymphoma.

Tisagenlecleucel

Tisagenlecleucel was approved for the treatment of pediatric patients up to 25 years of age with B-cell precursor acute lymphoblastic leukemia (ALL) whose disease is refractory to treatment or who have relapsed after second-line therapy or beyond.² Approval was based on the pivotal ELIANA trial, a single-arm, global phase 2 trial conducted at 25 centers worldwide during April 2015 through April 2017. Patients were eligible for enrollment if they had relapsed or refractory B-cell ALL and were at least 3 years of age at screening and no older than 21 years of age at diagnosis, had at least 5% lymphoblasts in the bone marrow at screening, had tumor expression of CD19, had adequate organ function, and a Karnofsky (adult) or Lansky (child) Performance Status of ≥50 (with the worst allowable score, 50, indicating a patient who requires considerable assistance and frequent medical care [Karnofsky] and lying around much of the day, but gets dressed; no active playing but participates in all quiet play and activities [Lansky]). Exclusion criteria included previous receipt of anti-CD19 therapy, concomitant genetic syndromes associated with bone marrow failure, previous malignancy, and/or active or latent hepatitis B or C virus (HBV/HCV) infection.

The overall remission rate (ORR) was evaluated in 75 patients who were given a single dose of tisagenlecleucel (a median weight-adjusted dose of 3.1 x 10⁶ transduced viable T cells per kg of body weight) within 14 days of completing a lymphodepleting chemotherapy regimen. The confirmed ORR after at least 3 months of follow-up, as assessed by independent central review, was 81%, which included 60% of patients in complete remission (CR) and 21% in complete remission with incomplete hematologic recovery, all of whom were negative for minimal residual disease.

The most common adverse events (AEs) associated with tisagenlecleucel treatment were cytokine release syndrome (CRS), hypogammaglobulinemia, infection, pyrexia, decreased appetite, headache, encephalopathy, hypotension, bleeding episodes, tachycardia, nausea, diarrhea, vomiting, viral infectious disorders, hypoxia, fatigue, acute kidney injury, and delirium. AEs were of grade 3/4 severity in 84% of patients.³

To combat serious safety issues, including CRS and neurologic toxicities, the FDA approved tisagenlecleucel with a Risk Evaluation and Mitigation Strategy (REMS) that, in part, requires health care providers who administer the drug to be trained in their management. It also requires the facility where treatment is administered to have immediate, onsite access to the drug tocilizumab, which was approved in conjunction with tisagenlecleucel for the treatment of patients who experience CRS.

In addition to information about the REMS, the prescribing information details warnings and precautions relating to several other common toxicities. These include hypersensitivity reactions, serious infections, prolonged cytopenias, and hypogammaglobulinemia.

Patients should be monitored for signs and symptoms of infection and treated appropriately. Viral reactivation can occur after tisagenlecleucel treatment, so patients should be screened for HBV, HCV, and human immunodeficiency virus before collection of cells.

The administration of myeloid growth factors is not recommended during the first 3 weeks after infusion or until CRS has resolved. Immunoglobulin levels should be monitored after treatment and hypogammaglobulinemia managed using infection precautions, antibiotic prophylaxis, and immunoglobulin replacement according to standard guidelines.

Patients treated with tisagenlecleucel should also be monitored for life for secondary malignancies, should not be treated with live vaccines from 2 weeks before the start of lymphodepleting chemotherapy until immune recovery after tisagenlecleucel infusion, and should be aware of the potential for neurological events to impact their ability to drive and use dangerous machinery.⁴

Tisagenlecleucel is marketed as Kymriah by Novartis Pharmaceuticals. The recommended dose is 1 infusion of 0.2-5 x 10⁶ CAR-positive viable T cells per kilogram of body weight intravenously (for patients ≤50kg) and 0.1-2.5 x 10⁸ cells/kg (for patients >50kg), administered 2-14 days after lymphodepleting chemotherapy.

Axicabtagene ciloleucel

Axicabtagene ciloleucel was approved for the treatment of adult patients with certain types of relapsed or refractory large B-cell lymphoma, including diffuse large B-cell lymphoma (DLBCL), primary mediastinal B-cell lymphoma (PMBCL), high-grade B-cell lymphoma, and DLBCL arising from follicular lymphoma.⁵ It is not indicated for the treatment of patients with primary central nervous system lymphoma.

Approval followed positive results from the phase 2 single-arm, multicenter ZUMA-1 trial.⁶ Patients were included if they were aged 18 years of age and older, had histologically confirmed aggressive B-cell non-Hodgkin lymphoma that was chemotherapy refractory, had received adequate previous therapy, had at least 1 measurable lesion, had completed radiation or systemic therapy at least 2 weeks before, had resolved toxicities related to previous therapy, and had an Eastern Cooperative Oncology Group Performance Status of 0 (asymptomatic) or 1 (symptomatic), an absolute neutrophil count of ≥1000/µL, a platelet count of ≥50,000/µL, and adequate hepatic, renal and cardiac function. They were treated with a single infusion of axicabtagene ciloleucel after lymphodepleting chemotherapy.

Patients who had received previous CD19-targeted therapy, who had concomitant genetic syndromes associated with bone marrow failure, who had previous malignancy, and who had active or latent HBV/HCV infection were among those excluded from the study.

Patients were enrolled in 2 cohorts; those with DLBCL (n = 77) and those with PMBCL or transformed follicular lymphoma (n = 24). The primary endpoint was objective response rate, and after a primary analysis at a minimum of 6 months follow-up, the objective response rate was 82%, with a CR rate of 52%. Among patients who achieved CR, the median duration of response was not reached after a median follow-up of 7.9 months.

A subsequent updated analysis was performed when 108 patients had been followed for a minimum of 1 year. The objective response rate was 82%, and the CR rate was 58%, with some patients having CR in the absence of additional therapies as late as 15 months after treatment. At this updated analysis, 42% of patients continued to have a response, 40% of whom remained in CR.

The most common grade 3 or higher AEs included febrile neutropenia, fever, CRS, encephalopathy, infections, hypotension, and hypoxia. Serious AEs occurred in 52% of patients and included CRS, neurologic toxicity, prolonged cytopenias, and serious infections. Grade 3 or higher CRS or neurologic toxicities occurred in 13% and 28% of patients, respectively. Three patients died during treatment.

To mitigate the risk of CRS and neurologic toxicity, axicabtagene ciloleucel is approved with an REMS that requires appropriate certification and training before hospitals are cleared to administer the therapy.

Other warnings and precautions in the prescribing information relate to serious infections (monitor for signs and symptoms and treat appropriately), prolonged cytopenias (monitor blood counts), hypogammaglobulinemia (monitor immunoglobulin levels and manage appropriately), secondary malignancies (life-long monitoring), and the potential effects of neurologic events on a patient’s ability to drive and operate dangerous machinery (avoid for at least 8 weeks after infusion).⁷

Axicabtagene ciloleucel is marketed as Yescarta by Kite Pharma Inc. The recommended dose is a single intravenous infusion with a target of 2 x 10⁶ CAR-positive viable T cells per kilogram of body weight, preceded by fludarabine and cyclophosphamide lymphodepleting chemotherapy.

The treatment landscape for hematologic malignancies is evolving faster than ever before, with a range of available therapeutic options that is now almost as diverse as this group of tumors. Immunotherapy in particular is front and center in the battle to control these diseases. Here, we describe the latest promising developments.

Exploiting T cells

The treatment landscape for hematologic malignancies is diverse, but one particular type of therapy has led the charge in improving patient outcomes. Several features of hematologic malignancies may make them particularly amenable to immunotherapy, including the fact that they are derived from corrupt immune cells and come into constant contact with other immune cells within the hematopoietic environment in which they reside. One of the oldest forms of immunotherapy, hematopoietic stem-cell transplantation (HSCT), remains the only curative option for many patients with hematologic malignancies.^1,2

Given the central role of T lymphocytes in antitumor immunity, research efforts have focused on harnessing their activity for cancer treatment. One example of this is adoptive cellular therapy (ACT), in which T cells are collected from a patient, grown outside the body to increase their number and then reinfused back to the patient. Allogeneic HSCT, in which the stem cells are collected from a matching donor and transplanted into the patient, is a crude example of ACT. The graft-versus-tumor effect is driven by donor cells present in the transplant, but is limited by the development of graft-versus-host disease (GvHD), whereby the donor T cells attack healthy host tissue.

Other types of ACT have been developed in an effort to capitalize on the anti-tumor effects of the patients own T cells and thus avoid the potentially fatal complication of GvHD. Tumor-infiltrating lymphocyte (TIL) therapy was developed to exploit the presence of tumor-specific T cells in the tumor microenvironment. To date, the efficacy of TIL therapy has been predominantly limited to melanoma.^1,3,4

Most recently, there has been a substantial buzz around the idea of genetically engineering T cells before they are reintroduced into the patient, to increase their anti-tumor efficacy and minimize damage to healthy tissue. This is achieved either by manipulating the antigen binding portion of the T-cell receptor to alter its specificity (TCR T cells) or by generating artificial fusion receptors known as chimeric antigen receptors (CAR T cells; Figure 1). The former is limited by the need for the TCR to be genetically matched to the patient’s immune type, whereas the latter is more flexible in this regard and has proved most successful.

Headlining advancements with CAR T cells

CAR T cells directed against the CD19 antigen, found on the surface of many hematologic malignancies, are the most clinically advanced in this rapidly evolving field (Table 1). Durable remissions have been demonstrated in patients with relapsed and refractory hematologic malignancies, including non-Hodgkin lymphoma (NHL), chronic lymphocytic leukemia (CLL), and acute lymphoblastic lymphoma (ALL), with efficacy in both the pre- and posttransplant setting and in patients with chemotherapy-refractory disease.^4,5

CTL019, a CD19-targeted CAR-T cell therapy, also known as tisagenlecleucel-T, has received breakthrough therapy designation from the US Food and Drug Administration (FDA) for the treatment of pediatric and adult patients with relapsed/refractory B-cell ALL and, more recently, for the treatment of adult patients with relapsed/refractory diffuse large B cell lymphoma.⁶

It is edging closer to FDA approval for the ALL indication, having been granted priority review in March on the basis of the phase 2 ELIANA trial, in which 50 patients received a single infusion of CTL019. Data presented at the American Society of Hematology annual meeting in December 2016 showed that 82% of patients achieved either complete remission (CR) or CR with incomplete blood count recovery (CRi) 3 months after treatment.⁷

Meanwhile, Kite Pharma has a rolling submission with the FDA for KTE-C19 (axicabtagene ciloleucel) for the treatment of patients with relapsed/refractory B-cell NHL who are ineligible for HSCT. In the ZUMA-1 trial, this therapy demonstrated an overall response rate (ORR) of 71%.⁸ Juno Therapeutics is developing several CAR T-cell therapies, including JCAR017, which elicited CR in 60% of patients with relapsed/refractory NHL.⁹

Target antigens other than CD19 are being explored, but these are mostly in the early stages of clinical development. While the focus has predominantly been on the treatment of lymphoma and leukemia, a presentation at the American Society for Clinical Oncology annual meeting in June reported the efficacy of a CAR-T cell therapy targeting the B-cell maturation antigen in patients with multiple myeloma. Results from 19 patients enrolled in an ongoing phase 1 trial in China showed that 14 had achieved stringent CR, 1 partial remission (PR) and 4 very good partial remission (VGPR).¹⁰

Antibodies evolve

Another type of immunotherapy that has revolutionized the treatment of hematologic malignancies is monoclonal antibodies (mAbs), targeting antigens on the surface of malignant B and T cells, in particular CD20. The approval of CD20-targeting mAb rituximab in 1997 was the first coup for the development of immunotherapy for the treatment of hematologic malignancies. It has become part of the standard treatment regimen for B-cell malignancies, including NHL and CLL, in combination with various types of chemotherapy.

Several other CD20-targeting antibodies have been developed (Table 2), some of which work in the same way as rituximab (eg, ofatumumab) and some that have a slightly different mechanism of action (eg, obinutuzumab).¹¹ Both types of antibody have proved highly effective; ofatumumab is FDA approved for the treatment of advanced CLL and is being evaluated in phase 3 trials in other hematologic malignancies, while obinutuzumab has received regulatory approval for the first-line treatment of CLL, replacing the standard rituximab-containing regimen.¹²

Innovative design

Newer drug designs, which have sought to take mAb therapy to the next level, have also shown significant efficacy in hematologic malignancies. Antibody-drug conjugates (ADCs) combine the cytotoxic efficacy of chemotherapeutic agents with the specificity of a mAb targeting a tumor-specific antigen. This essentially creates a targeted payload that improves upon the efficacy of mAb monotherapy but mitigates some of the side effects of chemotherapy related to their indiscriminate killing of both cancerous and healthy cells.

The development of ADCs has been somewhat of a rollercoaster ride, with the approval and subsequent withdrawal of the first-in-class drug gemtuzumab ozogamicin in 2010, but the field was reinvigorated with the successful development of brentuximab vedotin, which targets the CD30 antigen and is approved for the treatment of multiple different hematologic malignancies, including, most recently, for posttransplant consolidation therapy in patients with Hodgkin lymphoma at high risk of relapse or progression.¹⁸

Brentuximab vedotin may soon be joined by another FDA-approved ADC, this one targeting CD22. Inotuzumab ozogamicin was recently granted priority review for the treatment of relapsed/refractory ALL. The FDA is reviewing data from the phase 3 INO-VATE study in which inotuzumab ozogamicin reduced the risk of disease progression or death by 55% compared with standard therapy, and a decision is expected by August.¹⁹ Other ADC targets being investigated in clinical trials include CD138, CD19, and CD33 (Table 3). Meanwhile, a meta-analysis of randomized trials suggested that the withdrawal of gemtuzumab ozogamicin may have been premature, indicating that it does improve long-term overall survival (OS) and reduces the risk of relapse.²⁰

21

B-cell signaling a ripe target

Beyond immunotherapy, molecularly targeted drugs directed against key drivers of hematologic malignancies are also showing great promise. In particular, the B-cell receptor (BCR) signaling pathway, a central regulator of B-cell function, and its constituent kinases that are frequently dysregulated in B cell malignancies, has emerged as an exciting therapeutic avenue.

A variety of small molecule inhibitors targeting different nodes of the BCR pathway have been developed (Table 4), but the greatest success to date has been achieved with drugs targeting Bruton’s tyrosine kinase (BTK). Their clinical development culminated in the approval of ibrutinib for the treatment of patients with mantle cell lymphoma in 2013 and subsequently for patients with CLL, Waldenström macroglobulinemia, and most recently for patients with marginal zone lymphoma.

The treatment landscape for hematologic malignancies is evolving faster than ever before, with a range of available therapeutic options that is now almost as diverse as this group of tumors. Immunotherapy in particular is front and center in the battle to control these diseases. Here, we describe the latest promising developments.

Exploiting T cells

The treatment landscape for hematologic malignancies is diverse, but one particular type of therapy has led the charge in improving patient outcomes. Several features of hematologic malignancies may make them particularly amenable to immunotherapy, including the fact that they are derived from corrupt immune cells and come into constant contact with other immune cells within the hematopoietic environment in which they reside. One of the oldest forms of immunotherapy, hematopoietic stem-cell transplantation (HSCT), remains the only curative option for many patients with hematologic malignancies.^1,2

Given the central role of T lymphocytes in antitumor immunity, research efforts have focused on harnessing their activity for cancer treatment. One example of this is adoptive cellular therapy (ACT), in which T cells are collected from a patient, grown outside the body to increase their number and then reinfused back to the patient. Allogeneic HSCT, in which the stem cells are collected from a matching donor and transplanted into the patient, is a crude example of ACT. The graft-versus-tumor effect is driven by donor cells present in the transplant, but is limited by the development of graft-versus-host disease (GvHD), whereby the donor T cells attack healthy host tissue.

Other types of ACT have been developed in an effort to capitalize on the anti-tumor effects of the patients own T cells and thus avoid the potentially fatal complication of GvHD. Tumor-infiltrating lymphocyte (TIL) therapy was developed to exploit the presence of tumor-specific T cells in the tumor microenvironment. To date, the efficacy of TIL therapy has been predominantly limited to melanoma.^1,3,4

Most recently, there has been a substantial buzz around the idea of genetically engineering T cells before they are reintroduced into the patient, to increase their anti-tumor efficacy and minimize damage to healthy tissue. This is achieved either by manipulating the antigen binding portion of the T-cell receptor to alter its specificity (TCR T cells) or by generating artificial fusion receptors known as chimeric antigen receptors (CAR T cells; Figure 1). The former is limited by the need for the TCR to be genetically matched to the patient’s immune type, whereas the latter is more flexible in this regard and has proved most successful.

Headlining advancements with CAR T cells

CAR T cells directed against the CD19 antigen, found on the surface of many hematologic malignancies, are the most clinically advanced in this rapidly evolving field (Table 1). Durable remissions have been demonstrated in patients with relapsed and refractory hematologic malignancies, including non-Hodgkin lymphoma (NHL), chronic lymphocytic leukemia (CLL), and acute lymphoblastic lymphoma (ALL), with efficacy in both the pre- and posttransplant setting and in patients with chemotherapy-refractory disease.^4,5

CTL019, a CD19-targeted CAR-T cell therapy, also known as tisagenlecleucel-T, has received breakthrough therapy designation from the US Food and Drug Administration (FDA) for the treatment of pediatric and adult patients with relapsed/refractory B-cell ALL and, more recently, for the treatment of adult patients with relapsed/refractory diffuse large B cell lymphoma.⁶

It is edging closer to FDA approval for the ALL indication, having been granted priority review in March on the basis of the phase 2 ELIANA trial, in which 50 patients received a single infusion of CTL019. Data presented at the American Society of Hematology annual meeting in December 2016 showed that 82% of patients achieved either complete remission (CR) or CR with incomplete blood count recovery (CRi) 3 months after treatment.⁷

Meanwhile, Kite Pharma has a rolling submission with the FDA for KTE-C19 (axicabtagene ciloleucel) for the treatment of patients with relapsed/refractory B-cell NHL who are ineligible for HSCT. In the ZUMA-1 trial, this therapy demonstrated an overall response rate (ORR) of 71%.⁸ Juno Therapeutics is developing several CAR T-cell therapies, including JCAR017, which elicited CR in 60% of patients with relapsed/refractory NHL.⁹

Target antigens other than CD19 are being explored, but these are mostly in the early stages of clinical development. While the focus has predominantly been on the treatment of lymphoma and leukemia, a presentation at the American Society for Clinical Oncology annual meeting in June reported the efficacy of a CAR-T cell therapy targeting the B-cell maturation antigen in patients with multiple myeloma. Results from 19 patients enrolled in an ongoing phase 1 trial in China showed that 14 had achieved stringent CR, 1 partial remission (PR) and 4 very good partial remission (VGPR).¹⁰

Antibodies evolve

Another type of immunotherapy that has revolutionized the treatment of hematologic malignancies is monoclonal antibodies (mAbs), targeting antigens on the surface of malignant B and T cells, in particular CD20. The approval of CD20-targeting mAb rituximab in 1997 was the first coup for the development of immunotherapy for the treatment of hematologic malignancies. It has become part of the standard treatment regimen for B-cell malignancies, including NHL and CLL, in combination with various types of chemotherapy.

Several other CD20-targeting antibodies have been developed (Table 2), some of which work in the same way as rituximab (eg, ofatumumab) and some that have a slightly different mechanism of action (eg, obinutuzumab).¹¹ Both types of antibody have proved highly effective; ofatumumab is FDA approved for the treatment of advanced CLL and is being evaluated in phase 3 trials in other hematologic malignancies, while obinutuzumab has received regulatory approval for the first-line treatment of CLL, replacing the standard rituximab-containing regimen.¹²

Innovative design

Newer drug designs, which have sought to take mAb therapy to the next level, have also shown significant efficacy in hematologic malignancies. Antibody-drug conjugates (ADCs) combine the cytotoxic efficacy of chemotherapeutic agents with the specificity of a mAb targeting a tumor-specific antigen. This essentially creates a targeted payload that improves upon the efficacy of mAb monotherapy but mitigates some of the side effects of chemotherapy related to their indiscriminate killing of both cancerous and healthy cells.

The development of ADCs has been somewhat of a rollercoaster ride, with the approval and subsequent withdrawal of the first-in-class drug gemtuzumab ozogamicin in 2010, but the field was reinvigorated with the successful development of brentuximab vedotin, which targets the CD30 antigen and is approved for the treatment of multiple different hematologic malignancies, including, most recently, for posttransplant consolidation therapy in patients with Hodgkin lymphoma at high risk of relapse or progression.¹⁸

Brentuximab vedotin may soon be joined by another FDA-approved ADC, this one targeting CD22. Inotuzumab ozogamicin was recently granted priority review for the treatment of relapsed/refractory ALL. The FDA is reviewing data from the phase 3 INO-VATE study in which inotuzumab ozogamicin reduced the risk of disease progression or death by 55% compared with standard therapy, and a decision is expected by August.¹⁹ Other ADC targets being investigated in clinical trials include CD138, CD19, and CD33 (Table 3). Meanwhile, a meta-analysis of randomized trials suggested that the withdrawal of gemtuzumab ozogamicin may have been premature, indicating that it does improve long-term overall survival (OS) and reduces the risk of relapse.²⁰

21

B-cell signaling a ripe target

Beyond immunotherapy, molecularly targeted drugs directed against key drivers of hematologic malignancies are also showing great promise. In particular, the B-cell receptor (BCR) signaling pathway, a central regulator of B-cell function, and its constituent kinases that are frequently dysregulated in B cell malignancies, has emerged as an exciting therapeutic avenue.

A variety of small molecule inhibitors targeting different nodes of the BCR pathway have been developed (Table 4), but the greatest success to date has been achieved with drugs targeting Bruton’s tyrosine kinase (BTK). Their clinical development culminated in the approval of ibrutinib for the treatment of patients with mantle cell lymphoma in 2013 and subsequently for patients with CLL, Waldenström macroglobulinemia, and most recently for patients with marginal zone lymphoma.

The treatment landscape for hematologic malignancies is evolving faster than ever before, with a range of available therapeutic options that is now almost as diverse as this group of tumors. Immunotherapy in particular is front and center in the battle to control these diseases. Here, we describe the latest promising developments.

Exploiting T cells

The treatment landscape for hematologic malignancies is diverse, but one particular type of therapy has led the charge in improving patient outcomes. Several features of hematologic malignancies may make them particularly amenable to immunotherapy, including the fact that they are derived from corrupt immune cells and come into constant contact with other immune cells within the hematopoietic environment in which they reside. One of the oldest forms of immunotherapy, hematopoietic stem-cell transplantation (HSCT), remains the only curative option for many patients with hematologic malignancies.^1,2

Given the central role of T lymphocytes in antitumor immunity, research efforts have focused on harnessing their activity for cancer treatment. One example of this is adoptive cellular therapy (ACT), in which T cells are collected from a patient, grown outside the body to increase their number and then reinfused back to the patient. Allogeneic HSCT, in which the stem cells are collected from a matching donor and transplanted into the patient, is a crude example of ACT. The graft-versus-tumor effect is driven by donor cells present in the transplant, but is limited by the development of graft-versus-host disease (GvHD), whereby the donor T cells attack healthy host tissue.

Other types of ACT have been developed in an effort to capitalize on the anti-tumor effects of the patients own T cells and thus avoid the potentially fatal complication of GvHD. Tumor-infiltrating lymphocyte (TIL) therapy was developed to exploit the presence of tumor-specific T cells in the tumor microenvironment. To date, the efficacy of TIL therapy has been predominantly limited to melanoma.^1,3,4

Most recently, there has been a substantial buzz around the idea of genetically engineering T cells before they are reintroduced into the patient, to increase their anti-tumor efficacy and minimize damage to healthy tissue. This is achieved either by manipulating the antigen binding portion of the T-cell receptor to alter its specificity (TCR T cells) or by generating artificial fusion receptors known as chimeric antigen receptors (CAR T cells; Figure 1). The former is limited by the need for the TCR to be genetically matched to the patient’s immune type, whereas the latter is more flexible in this regard and has proved most successful.

Headlining advancements with CAR T cells

CAR T cells directed against the CD19 antigen, found on the surface of many hematologic malignancies, are the most clinically advanced in this rapidly evolving field (Table 1). Durable remissions have been demonstrated in patients with relapsed and refractory hematologic malignancies, including non-Hodgkin lymphoma (NHL), chronic lymphocytic leukemia (CLL), and acute lymphoblastic lymphoma (ALL), with efficacy in both the pre- and posttransplant setting and in patients with chemotherapy-refractory disease.^4,5

CTL019, a CD19-targeted CAR-T cell therapy, also known as tisagenlecleucel-T, has received breakthrough therapy designation from the US Food and Drug Administration (FDA) for the treatment of pediatric and adult patients with relapsed/refractory B-cell ALL and, more recently, for the treatment of adult patients with relapsed/refractory diffuse large B cell lymphoma.⁶

It is edging closer to FDA approval for the ALL indication, having been granted priority review in March on the basis of the phase 2 ELIANA trial, in which 50 patients received a single infusion of CTL019. Data presented at the American Society of Hematology annual meeting in December 2016 showed that 82% of patients achieved either complete remission (CR) or CR with incomplete blood count recovery (CRi) 3 months after treatment.⁷

Meanwhile, Kite Pharma has a rolling submission with the FDA for KTE-C19 (axicabtagene ciloleucel) for the treatment of patients with relapsed/refractory B-cell NHL who are ineligible for HSCT. In the ZUMA-1 trial, this therapy demonstrated an overall response rate (ORR) of 71%.⁸ Juno Therapeutics is developing several CAR T-cell therapies, including JCAR017, which elicited CR in 60% of patients with relapsed/refractory NHL.⁹

Target antigens other than CD19 are being explored, but these are mostly in the early stages of clinical development. While the focus has predominantly been on the treatment of lymphoma and leukemia, a presentation at the American Society for Clinical Oncology annual meeting in June reported the efficacy of a CAR-T cell therapy targeting the B-cell maturation antigen in patients with multiple myeloma. Results from 19 patients enrolled in an ongoing phase 1 trial in China showed that 14 had achieved stringent CR, 1 partial remission (PR) and 4 very good partial remission (VGPR).¹⁰

Antibodies evolve

Another type of immunotherapy that has revolutionized the treatment of hematologic malignancies is monoclonal antibodies (mAbs), targeting antigens on the surface of malignant B and T cells, in particular CD20. The approval of CD20-targeting mAb rituximab in 1997 was the first coup for the development of immunotherapy for the treatment of hematologic malignancies. It has become part of the standard treatment regimen for B-cell malignancies, including NHL and CLL, in combination with various types of chemotherapy.

Several other CD20-targeting antibodies have been developed (Table 2), some of which work in the same way as rituximab (eg, ofatumumab) and some that have a slightly different mechanism of action (eg, obinutuzumab).¹¹ Both types of antibody have proved highly effective; ofatumumab is FDA approved for the treatment of advanced CLL and is being evaluated in phase 3 trials in other hematologic malignancies, while obinutuzumab has received regulatory approval for the first-line treatment of CLL, replacing the standard rituximab-containing regimen.¹²

Innovative design

Newer drug designs, which have sought to take mAb therapy to the next level, have also shown significant efficacy in hematologic malignancies. Antibody-drug conjugates (ADCs) combine the cytotoxic efficacy of chemotherapeutic agents with the specificity of a mAb targeting a tumor-specific antigen. This essentially creates a targeted payload that improves upon the efficacy of mAb monotherapy but mitigates some of the side effects of chemotherapy related to their indiscriminate killing of both cancerous and healthy cells.

The development of ADCs has been somewhat of a rollercoaster ride, with the approval and subsequent withdrawal of the first-in-class drug gemtuzumab ozogamicin in 2010, but the field was reinvigorated with the successful development of brentuximab vedotin, which targets the CD30 antigen and is approved for the treatment of multiple different hematologic malignancies, including, most recently, for posttransplant consolidation therapy in patients with Hodgkin lymphoma at high risk of relapse or progression.¹⁸

Brentuximab vedotin may soon be joined by another FDA-approved ADC, this one targeting CD22. Inotuzumab ozogamicin was recently granted priority review for the treatment of relapsed/refractory ALL. The FDA is reviewing data from the phase 3 INO-VATE study in which inotuzumab ozogamicin reduced the risk of disease progression or death by 55% compared with standard therapy, and a decision is expected by August.¹⁹ Other ADC targets being investigated in clinical trials include CD138, CD19, and CD33 (Table 3). Meanwhile, a meta-analysis of randomized trials suggested that the withdrawal of gemtuzumab ozogamicin may have been premature, indicating that it does improve long-term overall survival (OS) and reduces the risk of relapse.²⁰

21

B-cell signaling a ripe target

Beyond immunotherapy, molecularly targeted drugs directed against key drivers of hematologic malignancies are also showing great promise. In particular, the B-cell receptor (BCR) signaling pathway, a central regulator of B-cell function, and its constituent kinases that are frequently dysregulated in B cell malignancies, has emerged as an exciting therapeutic avenue.

A variety of small molecule inhibitors targeting different nodes of the BCR pathway have been developed (Table 4), but the greatest success to date has been achieved with drugs targeting Bruton’s tyrosine kinase (BTK). Their clinical development culminated in the approval of ibrutinib for the treatment of patients with mantle cell lymphoma in 2013 and subsequently for patients with CLL, Waldenström macroglobulinemia, and most recently for patients with marginal zone lymphoma.

Photo courtesy of the CDC

Having health insurance can mean the difference between life and death for US patients with follicular lymphoma (FL), according to research published in Blood.

The study showed that patients with private health insurance had nearly 2-fold better survival outcomes than patients without insurance or those who were covered by Medicare or Medicaid.

A review of records on more than 43,000 FL patients showed that, compared with patients under age 65 with private insurance, the hazard ratios (HR) for death among patients in the same age bracket were 1.96 for those with no insurance, 1.83 for those with Medicaid, and 1.96 for those with Medicare (P<0.0001 for each comparison).

“Our study finds that insurance status contributes to survival disparities in FL,” Christopher R. Flowers, MD, of Emory University in Atlanta, Georgia, and his colleagues wrote in Blood.

“Future studies on outcomes in FL should include insurance status as an important predictor. Further research on prognosis for FL should examine the impact of public policy, such as the passage of the [Affordable Care Act], on FL outcomes, as well as examine other factors that influence access to care, such as individual-level socioeconomic status, regular primary care visits, access to prescription medications, and care affordability.”

Earlier research showed that patients with Medicaid or no insurance were more likely than privately insured patients to be diagnosed with cancers at advanced stages, and some patients with aggressive non-Hodgkin lymphomas have been shown to have insurance-related disparities in treatments and outcomes.

To see whether the same could be true for patients with indolent-histology lymphomas such as FL, Dr Flowers and his colleagues extracted data from the National Cancer Database, a nationwide hospital-based cancer registry sponsored jointly by the American College of Surgeons and the American Cancer Society.

The investigators identified 43,648 patients, age 18 and older, who were diagnosed with FL from 2004 through 2014. The team looked at patients ages 18 to 64 as well as patients age 65 and older to account for changes in insurance with Medicare eligibility.

Overall survival among patients younger than 65 was significantly worse for patients with public insurance (Medicaid or Medicare) or no insurance in Cox proportional hazard models controlling for available data on sociodemographic factors and prognostic indicators.

However, compared with patients age 65 and older with private insurance, only patients with Medicare as their sole source of insurance had significantly worse overall survival (HR, 1.28; P<0.0001).

Patients who were uninsured or had Medicaid were more likely than others to have lower socioeconomic status, present with advanced-stage disease, have systemic symptoms, and have multiple comorbidities that persisted after controlling for known sociodemographic and prognostic factors.

The investigators found that, among patients under age 65, those with a comorbidity score of 1 had an HR for death of 1.71, compared with patients with no comorbidities, and patients with a score of 2 or greater had an HR of 3.1 (P<0.0001 for each comparison).

“The findings of the study indicate that improving access to affordable, quality healthcare may reduce disparities in survival for those currently lacking coverage,” the investigators wrote.

The study was supported by Emory University, the National Institutes of Health, and the National Center for Advancing Translational Sciences. Dr Flowers reported financial relationships with AbbVie, Spectrum, Celgene, and several other companies. The other authors reported having nothing to disclose.

Photo courtesy of the CDC

Having health insurance can mean the difference between life and death for US patients with follicular lymphoma (FL), according to research published in Blood.

The study showed that patients with private health insurance had nearly 2-fold better survival outcomes than patients without insurance or those who were covered by Medicare or Medicaid.

A review of records on more than 43,000 FL patients showed that, compared with patients under age 65 with private insurance, the hazard ratios (HR) for death among patients in the same age bracket were 1.96 for those with no insurance, 1.83 for those with Medicaid, and 1.96 for those with Medicare (P<0.0001 for each comparison).

“Our study finds that insurance status contributes to survival disparities in FL,” Christopher R. Flowers, MD, of Emory University in Atlanta, Georgia, and his colleagues wrote in Blood.

“Future studies on outcomes in FL should include insurance status as an important predictor. Further research on prognosis for FL should examine the impact of public policy, such as the passage of the [Affordable Care Act], on FL outcomes, as well as examine other factors that influence access to care, such as individual-level socioeconomic status, regular primary care visits, access to prescription medications, and care affordability.”

Earlier research showed that patients with Medicaid or no insurance were more likely than privately insured patients to be diagnosed with cancers at advanced stages, and some patients with aggressive non-Hodgkin lymphomas have been shown to have insurance-related disparities in treatments and outcomes.

To see whether the same could be true for patients with indolent-histology lymphomas such as FL, Dr Flowers and his colleagues extracted data from the National Cancer Database, a nationwide hospital-based cancer registry sponsored jointly by the American College of Surgeons and the American Cancer Society.

The investigators identified 43,648 patients, age 18 and older, who were diagnosed with FL from 2004 through 2014. The team looked at patients ages 18 to 64 as well as patients age 65 and older to account for changes in insurance with Medicare eligibility.

Overall survival among patients younger than 65 was significantly worse for patients with public insurance (Medicaid or Medicare) or no insurance in Cox proportional hazard models controlling for available data on sociodemographic factors and prognostic indicators.

However, compared with patients age 65 and older with private insurance, only patients with Medicare as their sole source of insurance had significantly worse overall survival (HR, 1.28; P<0.0001).

Patients who were uninsured or had Medicaid were more likely than others to have lower socioeconomic status, present with advanced-stage disease, have systemic symptoms, and have multiple comorbidities that persisted after controlling for known sociodemographic and prognostic factors.

The investigators found that, among patients under age 65, those with a comorbidity score of 1 had an HR for death of 1.71, compared with patients with no comorbidities, and patients with a score of 2 or greater had an HR of 3.1 (P<0.0001 for each comparison).

“The findings of the study indicate that improving access to affordable, quality healthcare may reduce disparities in survival for those currently lacking coverage,” the investigators wrote.

The study was supported by Emory University, the National Institutes of Health, and the National Center for Advancing Translational Sciences. Dr Flowers reported financial relationships with AbbVie, Spectrum, Celgene, and several other companies. The other authors reported having nothing to disclose.

Photo courtesy of the CDC

Having health insurance can mean the difference between life and death for US patients with follicular lymphoma (FL), according to research published in Blood.

The study showed that patients with private health insurance had nearly 2-fold better survival outcomes than patients without insurance or those who were covered by Medicare or Medicaid.

A review of records on more than 43,000 FL patients showed that, compared with patients under age 65 with private insurance, the hazard ratios (HR) for death among patients in the same age bracket were 1.96 for those with no insurance, 1.83 for those with Medicaid, and 1.96 for those with Medicare (P<0.0001 for each comparison).

“Our study finds that insurance status contributes to survival disparities in FL,” Christopher R. Flowers, MD, of Emory University in Atlanta, Georgia, and his colleagues wrote in Blood.

“Future studies on outcomes in FL should include insurance status as an important predictor. Further research on prognosis for FL should examine the impact of public policy, such as the passage of the [Affordable Care Act], on FL outcomes, as well as examine other factors that influence access to care, such as individual-level socioeconomic status, regular primary care visits, access to prescription medications, and care affordability.”

Earlier research showed that patients with Medicaid or no insurance were more likely than privately insured patients to be diagnosed with cancers at advanced stages, and some patients with aggressive non-Hodgkin lymphomas have been shown to have insurance-related disparities in treatments and outcomes.

To see whether the same could be true for patients with indolent-histology lymphomas such as FL, Dr Flowers and his colleagues extracted data from the National Cancer Database, a nationwide hospital-based cancer registry sponsored jointly by the American College of Surgeons and the American Cancer Society.

The investigators identified 43,648 patients, age 18 and older, who were diagnosed with FL from 2004 through 2014. The team looked at patients ages 18 to 64 as well as patients age 65 and older to account for changes in insurance with Medicare eligibility.

Overall survival among patients younger than 65 was significantly worse for patients with public insurance (Medicaid or Medicare) or no insurance in Cox proportional hazard models controlling for available data on sociodemographic factors and prognostic indicators.

However, compared with patients age 65 and older with private insurance, only patients with Medicare as their sole source of insurance had significantly worse overall survival (HR, 1.28; P<0.0001).

Patients who were uninsured or had Medicaid were more likely than others to have lower socioeconomic status, present with advanced-stage disease, have systemic symptoms, and have multiple comorbidities that persisted after controlling for known sociodemographic and prognostic factors.

The investigators found that, among patients under age 65, those with a comorbidity score of 1 had an HR for death of 1.71, compared with patients with no comorbidities, and patients with a score of 2 or greater had an HR of 3.1 (P<0.0001 for each comparison).

“The findings of the study indicate that improving access to affordable, quality healthcare may reduce disparities in survival for those currently lacking coverage,” the investigators wrote.

The study was supported by Emory University, the National Institutes of Health, and the National Center for Advancing Translational Sciences. Dr Flowers reported financial relationships with AbbVie, Spectrum, Celgene, and several other companies. The other authors reported having nothing to disclose.

Having health insurance can mean the difference between life and death for patients with follicular lymphoma, suggest results of a study showing that patients with private health insurance had nearly twofold better survival outcomes than patients without insurance or those who were covered by Medicare or Medicaid.

Thinkstock

A review of records on more than 43,000 patients with follicular lymphoma (FL) in a national cancer registry showed that, compared with patients under age 65 with private insurance, the hazard ratios (HR) for death among patients in the same age bracket with either no insurance, Medicaid, or Medicare were, respectively, 1.96, 1.83, and 1.96 (P less than .0001 for each comparison).

“Our study finds that insurance status contributes to survival disparities in FL. Future studies on outcomes in FL should include insurance status as an important predictor,” Christopher R. Flowers, MD, of Emory University in Atlanta and his colleagues wrote in Blood.

“Further research on prognosis for FL should examine the impact of public policy, such as the passage of the [Affordable Care Act], on FL outcomes, as well as examine other factors that influence access to care, such as individual-level socioeconomic status, regular primary care visits, access to prescription medications, and care affordability,” they added.

The investigators noted that earlier research found that patients with Medicaid or no insurance were more likely than privately-insured patients to be diagnosed with cancers at advanced stages, and that some patients with aggressive non-Hodgkin lymphomas have been shown to have insurance-related disparities in treatments and outcomes.

To see whether the same could be true for patients with indolent-histology lymphomas such as FL, they extracted data from the National Cancer Database, a nationwide hospital-based cancer registry sponsored jointly by the American College of Surgeons and the American Cancer Society.

They identified a total of 43,648 patients aged 18 years or older who were diagnosed with FL from 2004 through 2014. They looked at both patients 18-64 years and those 65 years and older to account for changes in insurance with Medicare eligibility.

Overall survival among patients younger than age 65 was significantly worse for patients with public insurance (Medicaid or Medicare) or no insurance in Cox proportional hazard models controlling for available data on sociodemographic factors and prognostic indicators.

However, compared with patients aged 65 and older with private insurance, only patients with Medicare as their sole source of insurance had significantly worse overall survival (HR, 1.28; P less than .0001).

Patients who were uninsured or had Medicaid were more likely than others to have lower socioeconomic status, present with advanced-stage disease, have systemic symptoms, and have multiple comorbidities that persisted after controlling for known sociodemographic and prognostic factors.

The investigators found that, among patients under age 65, those with a comorbidity score of 1 had an HR for death of 1.71, compared with patients with no comorbidities, and that patients with a score of 2 or greater had a HR of 3.1 (P less than .0001 for each comparison).

“The findings of the study indicate that improving access to affordable, quality health care may reduce disparities in survival for those currently lacking coverage,” the investigators wrote.

The study was supported by Emory University, the National Institutes of Health, and the National Center for Advancing Translational Sciences. Dr. Flowers reported financial relationships with AbbVie, Spectrum, Celgene, and several other companies. The other authors reported having nothing to disclose.

SOURCE: Goldstein JS et al. Blood. 2018 Jul 24. doi: 10.1182/blood-2018-03-839035.

Having health insurance can mean the difference between life and death for patients with follicular lymphoma, suggest results of a study showing that patients with private health insurance had nearly twofold better survival outcomes than patients without insurance or those who were covered by Medicare or Medicaid.

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A review of records on more than 43,000 patients with follicular lymphoma (FL) in a national cancer registry showed that, compared with patients under age 65 with private insurance, the hazard ratios (HR) for death among patients in the same age bracket with either no insurance, Medicaid, or Medicare were, respectively, 1.96, 1.83, and 1.96 (P less than .0001 for each comparison).

“Our study finds that insurance status contributes to survival disparities in FL. Future studies on outcomes in FL should include insurance status as an important predictor,” Christopher R. Flowers, MD, of Emory University in Atlanta and his colleagues wrote in Blood.

“Further research on prognosis for FL should examine the impact of public policy, such as the passage of the [Affordable Care Act], on FL outcomes, as well as examine other factors that influence access to care, such as individual-level socioeconomic status, regular primary care visits, access to prescription medications, and care affordability,” they added.

The investigators noted that earlier research found that patients with Medicaid or no insurance were more likely than privately-insured patients to be diagnosed with cancers at advanced stages, and that some patients with aggressive non-Hodgkin lymphomas have been shown to have insurance-related disparities in treatments and outcomes.

To see whether the same could be true for patients with indolent-histology lymphomas such as FL, they extracted data from the National Cancer Database, a nationwide hospital-based cancer registry sponsored jointly by the American College of Surgeons and the American Cancer Society.

They identified a total of 43,648 patients aged 18 years or older who were diagnosed with FL from 2004 through 2014. They looked at both patients 18-64 years and those 65 years and older to account for changes in insurance with Medicare eligibility.

Overall survival among patients younger than age 65 was significantly worse for patients with public insurance (Medicaid or Medicare) or no insurance in Cox proportional hazard models controlling for available data on sociodemographic factors and prognostic indicators.

However, compared with patients aged 65 and older with private insurance, only patients with Medicare as their sole source of insurance had significantly worse overall survival (HR, 1.28; P less than .0001).

Patients who were uninsured or had Medicaid were more likely than others to have lower socioeconomic status, present with advanced-stage disease, have systemic symptoms, and have multiple comorbidities that persisted after controlling for known sociodemographic and prognostic factors.

The investigators found that, among patients under age 65, those with a comorbidity score of 1 had an HR for death of 1.71, compared with patients with no comorbidities, and that patients with a score of 2 or greater had a HR of 3.1 (P less than .0001 for each comparison).

“The findings of the study indicate that improving access to affordable, quality health care may reduce disparities in survival for those currently lacking coverage,” the investigators wrote.

The study was supported by Emory University, the National Institutes of Health, and the National Center for Advancing Translational Sciences. Dr. Flowers reported financial relationships with AbbVie, Spectrum, Celgene, and several other companies. The other authors reported having nothing to disclose.

SOURCE: Goldstein JS et al. Blood. 2018 Jul 24. doi: 10.1182/blood-2018-03-839035.

Having health insurance can mean the difference between life and death for patients with follicular lymphoma, suggest results of a study showing that patients with private health insurance had nearly twofold better survival outcomes than patients without insurance or those who were covered by Medicare or Medicaid.

Thinkstock

A review of records on more than 43,000 patients with follicular lymphoma (FL) in a national cancer registry showed that, compared with patients under age 65 with private insurance, the hazard ratios (HR) for death among patients in the same age bracket with either no insurance, Medicaid, or Medicare were, respectively, 1.96, 1.83, and 1.96 (P less than .0001 for each comparison).

“Our study finds that insurance status contributes to survival disparities in FL. Future studies on outcomes in FL should include insurance status as an important predictor,” Christopher R. Flowers, MD, of Emory University in Atlanta and his colleagues wrote in Blood.

“Further research on prognosis for FL should examine the impact of public policy, such as the passage of the [Affordable Care Act], on FL outcomes, as well as examine other factors that influence access to care, such as individual-level socioeconomic status, regular primary care visits, access to prescription medications, and care affordability,” they added.

The investigators noted that earlier research found that patients with Medicaid or no insurance were more likely than privately-insured patients to be diagnosed with cancers at advanced stages, and that some patients with aggressive non-Hodgkin lymphomas have been shown to have insurance-related disparities in treatments and outcomes.

To see whether the same could be true for patients with indolent-histology lymphomas such as FL, they extracted data from the National Cancer Database, a nationwide hospital-based cancer registry sponsored jointly by the American College of Surgeons and the American Cancer Society.

They identified a total of 43,648 patients aged 18 years or older who were diagnosed with FL from 2004 through 2014. They looked at both patients 18-64 years and those 65 years and older to account for changes in insurance with Medicare eligibility.

Overall survival among patients younger than age 65 was significantly worse for patients with public insurance (Medicaid or Medicare) or no insurance in Cox proportional hazard models controlling for available data on sociodemographic factors and prognostic indicators.

However, compared with patients aged 65 and older with private insurance, only patients with Medicare as their sole source of insurance had significantly worse overall survival (HR, 1.28; P less than .0001).

Patients who were uninsured or had Medicaid were more likely than others to have lower socioeconomic status, present with advanced-stage disease, have systemic symptoms, and have multiple comorbidities that persisted after controlling for known sociodemographic and prognostic factors.

The investigators found that, among patients under age 65, those with a comorbidity score of 1 had an HR for death of 1.71, compared with patients with no comorbidities, and that patients with a score of 2 or greater had a HR of 3.1 (P less than .0001 for each comparison).

“The findings of the study indicate that improving access to affordable, quality health care may reduce disparities in survival for those currently lacking coverage,” the investigators wrote.

The study was supported by Emory University, the National Institutes of Health, and the National Center for Advancing Translational Sciences. Dr. Flowers reported financial relationships with AbbVie, Spectrum, Celgene, and several other companies. The other authors reported having nothing to disclose.

SOURCE: Goldstein JS et al. Blood. 2018 Jul 24. doi: 10.1182/blood-2018-03-839035.

Micrograph showing FL

A multidrug regimen can improve upon involved-field radiotherapy (IFRT) in patients with early stage follicular lymphoma (FL), according to research published in the Journal of Clinical Oncology.

FL patients who received IFRT plus cyclophosphamide, vincristine, and prednisolone (CVP)—with or without rituximab—had a significant improvement in progression-free survival (PFS) compared to patients who received standard treatment with IFRT alone.

However, there was no significant difference in overall survival (OS) between the treatment arms.

“This is the first successful randomized study ever to be conducted in early stage follicular lymphoma comparing standard therapy to standard therapy plus effective chemotherapy or immunochemotherapy,” said Michael MacManus, MBBCh, of Peter MacCallum Cancer Centre in Melbourne, Victoria, Australia.

“It shows that the initial treatment received by patients can significantly affect their long-term chance of staying free from disease. Moving forward, we are interested in determining whether there is a benefit in overall long-term survival for patients treated with the combination with further follow-up, and if there is any way to predict if a person will benefit from combined treatment based on analyses of blood or biopsy specimens.”

Dr MacManus and his colleagues studied 150 patients with stage I to II, low-grade FL who were enrolled in this trial between 2000 and 2012.

At randomization, the patients’ median age was 57, 52% were male, 75% had stage I disease, and 48% had PET staging.

Half of patients (n=75) were randomized to receive IFRT (30-36 Gy) alone, and half were randomized to IFRT (30-36 Gy) plus 6 cycles of CVP. From 2006 on, patients in the CVP arm received rituximab (R) as well (n=31).

Baseline characteristics were well-balanced between the treatment arms.

Efficacy

The median follow-up was 9.6 years (range, 3.1 to 15.8 years).

PFS was significantly better among patients randomized to receive CVP±R (hazard ratio [HR]=0.57; P=0.033). The estimated 10-year PFS rate was 41% in the IFRT arm and 59% in the CVP±R arm.

Patients randomized to receive CVP plus R (n=31) had significantly better PFS than patients randomized to receive IFRT alone (n=31) over the same time period (HR=0.26; P=0.045).

There were 10 deaths in the IRFT arm and 5 in the CVP±R arm, but there was no significant difference in OS between the arms (HR=0.62; P=0.40). The 10-year OS rate was 86% in the IFRT arm and 95% in the CVP±R arm.

There was no significant between-arm difference in transformation to aggressive lymphoma (P=0.1). Transformation occurred in 10 patients in the IFRT arm and 4 in the CVP±R arm.

Safety

There were 148 patients from both arms who ultimately received IFRT, and 69 patients who received CVP±R.

Grade 2 toxicities occurring in more than 10% of IFRT recipients included upper gastrointestinal (n=27; 18%), skin (n=21; 14%), and mucous membrane (n=19; 12%) toxicity. One IFRT recipient had grade 3 mucositis, and 1 had grade 4 esophageal/pharyngeal mucosal toxicity.

Grade 3 toxicities occurring in at least 2 patients in the CVP±R arm included neutropenia (n=10; 14%), infection (n=8; 12%), diarrhea (n=3; 4%), elevated gamma-glutamyl transferase (n=3; 4%), fatigue (n=3; 4%), and febrile neutropenia (n=3; 4%).

Three patients (4%) in the CVP±R arm had acute grade 3 neuropathy related to vincristine. Ten patients (14%) had grade 4 neutropenia.

The most common late toxicities for the entire patient cohort were salivary gland (n=8; 5%) and skin (n=4; 3%) toxicities.

Grade 3 lung and menopausal toxicities occurred in 1 patient each. Two patients had late grade 3 vincristine neuropathy. One patient who had grade 3 neuropathy during chemotherapy progressed to grade 4.

Micrograph showing FL

A multidrug regimen can improve upon involved-field radiotherapy (IFRT) in patients with early stage follicular lymphoma (FL), according to research published in the Journal of Clinical Oncology.

FL patients who received IFRT plus cyclophosphamide, vincristine, and prednisolone (CVP)—with or without rituximab—had a significant improvement in progression-free survival (PFS) compared to patients who received standard treatment with IFRT alone.

However, there was no significant difference in overall survival (OS) between the treatment arms.

“This is the first successful randomized study ever to be conducted in early stage follicular lymphoma comparing standard therapy to standard therapy plus effective chemotherapy or immunochemotherapy,” said Michael MacManus, MBBCh, of Peter MacCallum Cancer Centre in Melbourne, Victoria, Australia.

“It shows that the initial treatment received by patients can significantly affect their long-term chance of staying free from disease. Moving forward, we are interested in determining whether there is a benefit in overall long-term survival for patients treated with the combination with further follow-up, and if there is any way to predict if a person will benefit from combined treatment based on analyses of blood or biopsy specimens.”

Dr MacManus and his colleagues studied 150 patients with stage I to II, low-grade FL who were enrolled in this trial between 2000 and 2012.

At randomization, the patients’ median age was 57, 52% were male, 75% had stage I disease, and 48% had PET staging.

Half of patients (n=75) were randomized to receive IFRT (30-36 Gy) alone, and half were randomized to IFRT (30-36 Gy) plus 6 cycles of CVP. From 2006 on, patients in the CVP arm received rituximab (R) as well (n=31).

Baseline characteristics were well-balanced between the treatment arms.

Efficacy

The median follow-up was 9.6 years (range, 3.1 to 15.8 years).

PFS was significantly better among patients randomized to receive CVP±R (hazard ratio [HR]=0.57; P=0.033). The estimated 10-year PFS rate was 41% in the IFRT arm and 59% in the CVP±R arm.

Patients randomized to receive CVP plus R (n=31) had significantly better PFS than patients randomized to receive IFRT alone (n=31) over the same time period (HR=0.26; P=0.045).

There were 10 deaths in the IRFT arm and 5 in the CVP±R arm, but there was no significant difference in OS between the arms (HR=0.62; P=0.40). The 10-year OS rate was 86% in the IFRT arm and 95% in the CVP±R arm.

There was no significant between-arm difference in transformation to aggressive lymphoma (P=0.1). Transformation occurred in 10 patients in the IFRT arm and 4 in the CVP±R arm.

Safety

There were 148 patients from both arms who ultimately received IFRT, and 69 patients who received CVP±R.

Grade 2 toxicities occurring in more than 10% of IFRT recipients included upper gastrointestinal (n=27; 18%), skin (n=21; 14%), and mucous membrane (n=19; 12%) toxicity. One IFRT recipient had grade 3 mucositis, and 1 had grade 4 esophageal/pharyngeal mucosal toxicity.

Grade 3 toxicities occurring in at least 2 patients in the CVP±R arm included neutropenia (n=10; 14%), infection (n=8; 12%), diarrhea (n=3; 4%), elevated gamma-glutamyl transferase (n=3; 4%), fatigue (n=3; 4%), and febrile neutropenia (n=3; 4%).

Three patients (4%) in the CVP±R arm had acute grade 3 neuropathy related to vincristine. Ten patients (14%) had grade 4 neutropenia.

The most common late toxicities for the entire patient cohort were salivary gland (n=8; 5%) and skin (n=4; 3%) toxicities.

Grade 3 lung and menopausal toxicities occurred in 1 patient each. Two patients had late grade 3 vincristine neuropathy. One patient who had grade 3 neuropathy during chemotherapy progressed to grade 4.

Micrograph showing FL

A multidrug regimen can improve upon involved-field radiotherapy (IFRT) in patients with early stage follicular lymphoma (FL), according to research published in the Journal of Clinical Oncology.

FL patients who received IFRT plus cyclophosphamide, vincristine, and prednisolone (CVP)—with or without rituximab—had a significant improvement in progression-free survival (PFS) compared to patients who received standard treatment with IFRT alone.

However, there was no significant difference in overall survival (OS) between the treatment arms.

“This is the first successful randomized study ever to be conducted in early stage follicular lymphoma comparing standard therapy to standard therapy plus effective chemotherapy or immunochemotherapy,” said Michael MacManus, MBBCh, of Peter MacCallum Cancer Centre in Melbourne, Victoria, Australia.

“It shows that the initial treatment received by patients can significantly affect their long-term chance of staying free from disease. Moving forward, we are interested in determining whether there is a benefit in overall long-term survival for patients treated with the combination with further follow-up, and if there is any way to predict if a person will benefit from combined treatment based on analyses of blood or biopsy specimens.”

Dr MacManus and his colleagues studied 150 patients with stage I to II, low-grade FL who were enrolled in this trial between 2000 and 2012.

At randomization, the patients’ median age was 57, 52% were male, 75% had stage I disease, and 48% had PET staging.

Half of patients (n=75) were randomized to receive IFRT (30-36 Gy) alone, and half were randomized to IFRT (30-36 Gy) plus 6 cycles of CVP. From 2006 on, patients in the CVP arm received rituximab (R) as well (n=31).

Baseline characteristics were well-balanced between the treatment arms.

Efficacy

The median follow-up was 9.6 years (range, 3.1 to 15.8 years).

PFS was significantly better among patients randomized to receive CVP±R (hazard ratio [HR]=0.57; P=0.033). The estimated 10-year PFS rate was 41% in the IFRT arm and 59% in the CVP±R arm.

Patients randomized to receive CVP plus R (n=31) had significantly better PFS than patients randomized to receive IFRT alone (n=31) over the same time period (HR=0.26; P=0.045).

There were 10 deaths in the IRFT arm and 5 in the CVP±R arm, but there was no significant difference in OS between the arms (HR=0.62; P=0.40). The 10-year OS rate was 86% in the IFRT arm and 95% in the CVP±R arm.

There was no significant between-arm difference in transformation to aggressive lymphoma (P=0.1). Transformation occurred in 10 patients in the IFRT arm and 4 in the CVP±R arm.

Safety

There were 148 patients from both arms who ultimately received IFRT, and 69 patients who received CVP±R.

Grade 2 toxicities occurring in more than 10% of IFRT recipients included upper gastrointestinal (n=27; 18%), skin (n=21; 14%), and mucous membrane (n=19; 12%) toxicity. One IFRT recipient had grade 3 mucositis, and 1 had grade 4 esophageal/pharyngeal mucosal toxicity.

Grade 3 toxicities occurring in at least 2 patients in the CVP±R arm included neutropenia (n=10; 14%), infection (n=8; 12%), diarrhea (n=3; 4%), elevated gamma-glutamyl transferase (n=3; 4%), fatigue (n=3; 4%), and febrile neutropenia (n=3; 4%).

Three patients (4%) in the CVP±R arm had acute grade 3 neuropathy related to vincristine. Ten patients (14%) had grade 4 neutropenia.

The most common late toxicities for the entire patient cohort were salivary gland (n=8; 5%) and skin (n=4; 3%) toxicities.

Grade 3 lung and menopausal toxicities occurred in 1 patient each. Two patients had late grade 3 vincristine neuropathy. One patient who had grade 3 neuropathy during chemotherapy progressed to grade 4.

Rituximab-based chemotherapy can significantly reduce the risk of transformation of follicular lymphoma (FL) from an indolent to an aggressive histology, such as diffuse large B-cell lymphoma, results of a retrospective pooled analysis have suggested.

Patho/Wikimedia Commons/CC BY-SA 3.0

Data on a total of 8,116 patients were available for analysis; 509 of these patients had had histologic transformations. After a median follow-up of 87 months, the 10-year cumulative hazard for all patients was 7.7%. The 10-year cumulative hazard – one of two primary endpoints – was 5.2% for patients who had received any rituximab versus 8.7% for those who did not, which translated into a hazard ratio of 0.73 (P = .004).

Among patients who received rituximab during induction only, the 10-year cumulative hazard was 5.9%, and it was 3.6% among those who received rituximab during induction and maintenance phases of treatment. This difference translated into a HR of 0.55 (P = .003).

The benefit of rituximab induction and maintenance – compared with induction only – held up in a multivariate analysis controlling for age at diagnosis, sex, FLIPI (Follicular Lymphoma International Prognostic Index) score, active surveillance vs. treatment, and FL grade (HR, 0.55; P = .016).

There were 287 deaths among the 509 patients with transformation, resulting in a 10-year survival after transformation of 32%.

The 5-year survival after transformation was 38% for patients who were not exposed to rituximab, 42% for patients who received induction rituximab, and 43% for those who received both induction and maintenance rituximab, but the differences between the three groups were not statistically significant.

“More comprehensive knowledge of the biological risk factors for follicular lymphoma transformation and the molecular pathways involved is likely to help clinicians make more accurate prognostic assessments and also inform the potential usefulness of novel drugs for the treatment of follicular lymphoma,” the researchers wrote.

SOURCE: Federico M et al. Lancet Haematol. 2018 Jul 4. doi: 10.1016/S2352-3026(18)30090-5.
 

Rituximab-based chemotherapy can significantly reduce the risk of transformation of follicular lymphoma (FL) from an indolent to an aggressive histology, such as diffuse large B-cell lymphoma, results of a retrospective pooled analysis have suggested.

Patho/Wikimedia Commons/CC BY-SA 3.0

Data on a total of 8,116 patients were available for analysis; 509 of these patients had had histologic transformations. After a median follow-up of 87 months, the 10-year cumulative hazard for all patients was 7.7%. The 10-year cumulative hazard – one of two primary endpoints – was 5.2% for patients who had received any rituximab versus 8.7% for those who did not, which translated into a hazard ratio of 0.73 (P = .004).

Among patients who received rituximab during induction only, the 10-year cumulative hazard was 5.9%, and it was 3.6% among those who received rituximab during induction and maintenance phases of treatment. This difference translated into a HR of 0.55 (P = .003).

The benefit of rituximab induction and maintenance – compared with induction only – held up in a multivariate analysis controlling for age at diagnosis, sex, FLIPI (Follicular Lymphoma International Prognostic Index) score, active surveillance vs. treatment, and FL grade (HR, 0.55; P = .016).

There were 287 deaths among the 509 patients with transformation, resulting in a 10-year survival after transformation of 32%.

The 5-year survival after transformation was 38% for patients who were not exposed to rituximab, 42% for patients who received induction rituximab, and 43% for those who received both induction and maintenance rituximab, but the differences between the three groups were not statistically significant.

“More comprehensive knowledge of the biological risk factors for follicular lymphoma transformation and the molecular pathways involved is likely to help clinicians make more accurate prognostic assessments and also inform the potential usefulness of novel drugs for the treatment of follicular lymphoma,” the researchers wrote.

SOURCE: Federico M et al. Lancet Haematol. 2018 Jul 4. doi: 10.1016/S2352-3026(18)30090-5.
 

Rituximab-based chemotherapy can significantly reduce the risk of transformation of follicular lymphoma (FL) from an indolent to an aggressive histology, such as diffuse large B-cell lymphoma, results of a retrospective pooled analysis have suggested.

Patho/Wikimedia Commons/CC BY-SA 3.0

Data on a total of 8,116 patients were available for analysis; 509 of these patients had had histologic transformations. After a median follow-up of 87 months, the 10-year cumulative hazard for all patients was 7.7%. The 10-year cumulative hazard – one of two primary endpoints – was 5.2% for patients who had received any rituximab versus 8.7% for those who did not, which translated into a hazard ratio of 0.73 (P = .004).

Among patients who received rituximab during induction only, the 10-year cumulative hazard was 5.9%, and it was 3.6% among those who received rituximab during induction and maintenance phases of treatment. This difference translated into a HR of 0.55 (P = .003).

The benefit of rituximab induction and maintenance – compared with induction only – held up in a multivariate analysis controlling for age at diagnosis, sex, FLIPI (Follicular Lymphoma International Prognostic Index) score, active surveillance vs. treatment, and FL grade (HR, 0.55; P = .016).

There were 287 deaths among the 509 patients with transformation, resulting in a 10-year survival after transformation of 32%.

The 5-year survival after transformation was 38% for patients who were not exposed to rituximab, 42% for patients who received induction rituximab, and 43% for those who received both induction and maintenance rituximab, but the differences between the three groups were not statistically significant.

“More comprehensive knowledge of the biological risk factors for follicular lymphoma transformation and the molecular pathways involved is likely to help clinicians make more accurate prognostic assessments and also inform the potential usefulness of novel drugs for the treatment of follicular lymphoma,” the researchers wrote.

SOURCE: Federico M et al. Lancet Haematol. 2018 Jul 4. doi: 10.1016/S2352-3026(18)30090-5.
 

Obinutuzumab (Gazyva)

Health Canada has expanded the approved use of obinutuzumab (Gazyva®).

The anti-CD20 monoclonal antibody is now approved for use in combination with chemotherapy to treat patients with previously untreated follicular lymphoma (FL) that is advanced (stage II bulky, stage III, or stage IV).

In patients who respond to this treatment, obinutuzumab monotherapy can be given as maintenance.

Health Canada previously approved obinutuzumab for the following indications:

• In combination with chlorambucil to treat patients with previously untreated chronic lymphocytic leukemia
• First in combination with bendamustine, then as monotherapy, in FL patients who relapsed after or are refractory to a rituximab-containing regimen.

Phase 3 results

Health Canada’s latest approval of obinutuzumab is based on results from the phase 3 GALLIUM study, which were published in NEJM in October 2017. The following are updated data from the product monograph.

GALLIUM included 1385 patients with previously untreated non-Hodgkin lymphoma, and 1202 of these patients had previously untreated, advanced FL.

Half of the FL patients (n=601) were randomized to receive obinutuzumab plus chemotherapy (followed by obinutuzumab maintenance for up to 2 years), and half were randomized to rituximab plus chemotherapy (followed by rituximab maintenance for up to 2 years).

The different chemotherapies used were CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone), CVP (cyclophosphamide, vincristine, and prednisone), and bendamustine.

At a median observation time of 41.1 months, the overall response rate was 91% in the obinutuzumab arm and 88% in the rituximab arm. The complete response rates were 28% and 27%, respectively.

The median progression-free survival was not reached in either arm. The hazard ratio, for obinutuzumab compared to rituximab, was 0.72 (95% CI, 0.56-0.93, P=0.0118).

The estimated 3-year progression-free survival was 78.9% in the rituximab arm and 83.4% in the obinutuzumab arm.

Safety was evaluated based on all 1385 patients in the study, 86% of whom had FL and 14% of whom had marginal zone lymphoma.

Serious adverse events (AEs) occurred in 50% of patients in the obinutuzumab arm and 43% in the rituximab arm. Fatal AEs occurred in 5% and 4%, respectively. Infections and second malignancies were the leading causes of these deaths.

During the monotherapy period, the most common AEs (≥ 5%) in patients treated with obinutuzumab were cough (21%), neutropenia (19%), upper respiratory tract infection (15%), viral upper respiratory tract infection (15%), diarrhea (13%), arthralgia (10%), fatigue (9%), sinusitis (9%), infusion reactions (8%), pneumonia (8%), herpes zoster (8%), lower respiratory tract infection (7%), pyrexia (7%), back pain (6%), headache (6%), urinary tract infection (6%), nausea (6%), bronchitis (5%), and vomiting (5%).

Grade 3-4 AEs (≥1%) in patients treated with obinutuzumab included neutropenia (17%), pneumonia (3%), and febrile neutropenia (2%). There were 2 deaths due to pneumonia in the obinutuzumab arm.

Obinutuzumab (Gazyva)

Health Canada has expanded the approved use of obinutuzumab (Gazyva®).

The anti-CD20 monoclonal antibody is now approved for use in combination with chemotherapy to treat patients with previously untreated follicular lymphoma (FL) that is advanced (stage II bulky, stage III, or stage IV).

In patients who respond to this treatment, obinutuzumab monotherapy can be given as maintenance.

Health Canada previously approved obinutuzumab for the following indications:

• In combination with chlorambucil to treat patients with previously untreated chronic lymphocytic leukemia
• First in combination with bendamustine, then as monotherapy, in FL patients who relapsed after or are refractory to a rituximab-containing regimen.

Phase 3 results

Health Canada’s latest approval of obinutuzumab is based on results from the phase 3 GALLIUM study, which were published in NEJM in October 2017. The following are updated data from the product monograph.

GALLIUM included 1385 patients with previously untreated non-Hodgkin lymphoma, and 1202 of these patients had previously untreated, advanced FL.

Half of the FL patients (n=601) were randomized to receive obinutuzumab plus chemotherapy (followed by obinutuzumab maintenance for up to 2 years), and half were randomized to rituximab plus chemotherapy (followed by rituximab maintenance for up to 2 years).

The different chemotherapies used were CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone), CVP (cyclophosphamide, vincristine, and prednisone), and bendamustine.

At a median observation time of 41.1 months, the overall response rate was 91% in the obinutuzumab arm and 88% in the rituximab arm. The complete response rates were 28% and 27%, respectively.

The median progression-free survival was not reached in either arm. The hazard ratio, for obinutuzumab compared to rituximab, was 0.72 (95% CI, 0.56-0.93, P=0.0118).

The estimated 3-year progression-free survival was 78.9% in the rituximab arm and 83.4% in the obinutuzumab arm.

Safety was evaluated based on all 1385 patients in the study, 86% of whom had FL and 14% of whom had marginal zone lymphoma.

Serious adverse events (AEs) occurred in 50% of patients in the obinutuzumab arm and 43% in the rituximab arm. Fatal AEs occurred in 5% and 4%, respectively. Infections and second malignancies were the leading causes of these deaths.

During the monotherapy period, the most common AEs (≥ 5%) in patients treated with obinutuzumab were cough (21%), neutropenia (19%), upper respiratory tract infection (15%), viral upper respiratory tract infection (15%), diarrhea (13%), arthralgia (10%), fatigue (9%), sinusitis (9%), infusion reactions (8%), pneumonia (8%), herpes zoster (8%), lower respiratory tract infection (7%), pyrexia (7%), back pain (6%), headache (6%), urinary tract infection (6%), nausea (6%), bronchitis (5%), and vomiting (5%).

Grade 3-4 AEs (≥1%) in patients treated with obinutuzumab included neutropenia (17%), pneumonia (3%), and febrile neutropenia (2%). There were 2 deaths due to pneumonia in the obinutuzumab arm.

Obinutuzumab (Gazyva)

Health Canada has expanded the approved use of obinutuzumab (Gazyva®).

The anti-CD20 monoclonal antibody is now approved for use in combination with chemotherapy to treat patients with previously untreated follicular lymphoma (FL) that is advanced (stage II bulky, stage III, or stage IV).

In patients who respond to this treatment, obinutuzumab monotherapy can be given as maintenance.

Health Canada previously approved obinutuzumab for the following indications:

• In combination with chlorambucil to treat patients with previously untreated chronic lymphocytic leukemia
• First in combination with bendamustine, then as monotherapy, in FL patients who relapsed after or are refractory to a rituximab-containing regimen.

Phase 3 results

Health Canada’s latest approval of obinutuzumab is based on results from the phase 3 GALLIUM study, which were published in NEJM in October 2017. The following are updated data from the product monograph.

GALLIUM included 1385 patients with previously untreated non-Hodgkin lymphoma, and 1202 of these patients had previously untreated, advanced FL.

Half of the FL patients (n=601) were randomized to receive obinutuzumab plus chemotherapy (followed by obinutuzumab maintenance for up to 2 years), and half were randomized to rituximab plus chemotherapy (followed by rituximab maintenance for up to 2 years).

The different chemotherapies used were CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone), CVP (cyclophosphamide, vincristine, and prednisone), and bendamustine.

At a median observation time of 41.1 months, the overall response rate was 91% in the obinutuzumab arm and 88% in the rituximab arm. The complete response rates were 28% and 27%, respectively.

The median progression-free survival was not reached in either arm. The hazard ratio, for obinutuzumab compared to rituximab, was 0.72 (95% CI, 0.56-0.93, P=0.0118).

The estimated 3-year progression-free survival was 78.9% in the rituximab arm and 83.4% in the obinutuzumab arm.

Safety was evaluated based on all 1385 patients in the study, 86% of whom had FL and 14% of whom had marginal zone lymphoma.

Serious adverse events (AEs) occurred in 50% of patients in the obinutuzumab arm and 43% in the rituximab arm. Fatal AEs occurred in 5% and 4%, respectively. Infections and second malignancies were the leading causes of these deaths.

During the monotherapy period, the most common AEs (≥ 5%) in patients treated with obinutuzumab were cough (21%), neutropenia (19%), upper respiratory tract infection (15%), viral upper respiratory tract infection (15%), diarrhea (13%), arthralgia (10%), fatigue (9%), sinusitis (9%), infusion reactions (8%), pneumonia (8%), herpes zoster (8%), lower respiratory tract infection (7%), pyrexia (7%), back pain (6%), headache (6%), urinary tract infection (6%), nausea (6%), bronchitis (5%), and vomiting (5%).

Grade 3-4 AEs (≥1%) in patients treated with obinutuzumab included neutropenia (17%), pneumonia (3%), and febrile neutropenia (2%). There were 2 deaths due to pneumonia in the obinutuzumab arm.

Photo by Chad McNeeley

Transplant with radioimmunotherapy (RIT)-based conditioning is a viable treatment option for patients with indolent—but not aggressive—B-cell non-Hodgkin lymphomas (NHLs), according to researchers.

Long-term follow-up data showed “excellent” outcomes in patients with indolent B-NHL who received conditioning with ⁹⁰Y-ibritumomab tiuxetan plus fludarabine and low-dose total body irradiation (TBI) prior to HLA-matched hematopoietic stem cell transplant (HSCT).

However, long-term outcomes were inferior in patients with diffuse large B-cell lymphoma (DLBCL) and mantle cell lymphoma (MCL).

Camille E. Puronen, MD, of the University of Washington in Seattle, and her colleagues reported these results in Biology of Blood and Marrow Transplantation.

The study enrolled 40 patients with high-risk B-NHL. This included DLBCL (n=14), chronic lymphocytic leukemia (CLL; n=10), MCL (n=8), follicular lymphoma (FL; n=6); hairy cell leukemia (HCL; n=1), and marginal zone lymphoma (MZL; n=1).

Patients were treated with 0.4 mCi/kg ⁹⁰Y-ibritumomab tiuxetan, given 2 weeks prior to HSCT, to a maximum dose of 32 mCi.

Patients also received fludarabine at 30 mg/m² on day 5, 6, and 7 prior to HSCT and 2 Gy TBI given on the day of transplant.

In an earlier report, the objective response rate (ORR) was 60%, and 35% of patients had a complete response (CR) or unconfirmed CR.

The researchers said early responses were not associated with disease bulk or chemoresistance, as the ORR was 59% in patients with bulky or chemoresistant disease.

However, responses were associated with histology, as the ORR was 38% in patients with DLBCL, 50% in those with MCL, 83% in those with FL, and 90% in those with CLL.

Long-term survival

In the current report, 11 of 40 patients were still alive at a median follow up of 9 years (range, 5.3 to 10.2). Fourteen patients died of disease progression, and 14 died from complications of HSCT.

The 5-year overall survival (OS) was 40%, and the 5-year progression-free survival (PFS) was 28%.

The best survival rates were in patients with indolent histology. The 5-year PFS was 44% in these patients, and the 5-year OS was 67%.

The researchers said early CR was not associated with long-term survival. However, patients who had at least stable disease (SD) at earlier time points did have the opportunity to achieve long-term survival. All patients who progressed before day 84 were dead by the 1-year mark.

Of the 11 patients who were still alive at a median follow up of 9 years, 4 had a CR or unconfirmed CR at day 84 (FL: 1; CLL: 2; MCL: 1); 6 were in partial response (CLL: 3; FL: 1; MCL: 1; MZL: 1); and 1 patient with FL had SD.

Among the 18 patients with indolent NHL, long-term PFS was observed in 5 of the 7 patients who achieved early CR and 8 of the 11 patients who did not achieve early CR.

Two of the 4 MCL patients who achieved an early CR had long-term PFS, but none of the MCL patients without an early CR had long-term PFS.

Among DLBCL patients, 1 of the 4 who achieved early CR had long-term PFS, but none of the patients without an early CR had long-term PFS. Only 1 DLBCL patient survived beyond 5 years. None survived beyond 8 years.

The researchers said the favorable outcomes in patients with indolent B-NHL are consistent with the known efficacy of RIT and the graft-versus-leukemia effect in these patients.

The team also noted that, since this trial began, several novel agents have been approved for the treatment of indolent B-NHL, which means allogeneic HSCT is often moved to later in the disease course.

The researchers concluded that ⁹⁰Y-ibritumomab tiuxetan-based conditioning could “continue to play an important role in these settings,” but “improved strategies are needed” for patients with MCL and DLBCL.

Photo by Chad McNeeley

Transplant with radioimmunotherapy (RIT)-based conditioning is a viable treatment option for patients with indolent—but not aggressive—B-cell non-Hodgkin lymphomas (NHLs), according to researchers.

Long-term follow-up data showed “excellent” outcomes in patients with indolent B-NHL who received conditioning with ⁹⁰Y-ibritumomab tiuxetan plus fludarabine and low-dose total body irradiation (TBI) prior to HLA-matched hematopoietic stem cell transplant (HSCT).

However, long-term outcomes were inferior in patients with diffuse large B-cell lymphoma (DLBCL) and mantle cell lymphoma (MCL).

Camille E. Puronen, MD, of the University of Washington in Seattle, and her colleagues reported these results in Biology of Blood and Marrow Transplantation.

The study enrolled 40 patients with high-risk B-NHL. This included DLBCL (n=14), chronic lymphocytic leukemia (CLL; n=10), MCL (n=8), follicular lymphoma (FL; n=6); hairy cell leukemia (HCL; n=1), and marginal zone lymphoma (MZL; n=1).

Patients were treated with 0.4 mCi/kg ⁹⁰Y-ibritumomab tiuxetan, given 2 weeks prior to HSCT, to a maximum dose of 32 mCi.

Patients also received fludarabine at 30 mg/m² on day 5, 6, and 7 prior to HSCT and 2 Gy TBI given on the day of transplant.

In an earlier report, the objective response rate (ORR) was 60%, and 35% of patients had a complete response (CR) or unconfirmed CR.

The researchers said early responses were not associated with disease bulk or chemoresistance, as the ORR was 59% in patients with bulky or chemoresistant disease.

However, responses were associated with histology, as the ORR was 38% in patients with DLBCL, 50% in those with MCL, 83% in those with FL, and 90% in those with CLL.

Long-term survival

In the current report, 11 of 40 patients were still alive at a median follow up of 9 years (range, 5.3 to 10.2). Fourteen patients died of disease progression, and 14 died from complications of HSCT.

The 5-year overall survival (OS) was 40%, and the 5-year progression-free survival (PFS) was 28%.

The best survival rates were in patients with indolent histology. The 5-year PFS was 44% in these patients, and the 5-year OS was 67%.

The researchers said early CR was not associated with long-term survival. However, patients who had at least stable disease (SD) at earlier time points did have the opportunity to achieve long-term survival. All patients who progressed before day 84 were dead by the 1-year mark.

Of the 11 patients who were still alive at a median follow up of 9 years, 4 had a CR or unconfirmed CR at day 84 (FL: 1; CLL: 2; MCL: 1); 6 were in partial response (CLL: 3; FL: 1; MCL: 1; MZL: 1); and 1 patient with FL had SD.

Among the 18 patients with indolent NHL, long-term PFS was observed in 5 of the 7 patients who achieved early CR and 8 of the 11 patients who did not achieve early CR.

Two of the 4 MCL patients who achieved an early CR had long-term PFS, but none of the MCL patients without an early CR had long-term PFS.

Among DLBCL patients, 1 of the 4 who achieved early CR had long-term PFS, but none of the patients without an early CR had long-term PFS. Only 1 DLBCL patient survived beyond 5 years. None survived beyond 8 years.

The researchers said the favorable outcomes in patients with indolent B-NHL are consistent with the known efficacy of RIT and the graft-versus-leukemia effect in these patients.

The team also noted that, since this trial began, several novel agents have been approved for the treatment of indolent B-NHL, which means allogeneic HSCT is often moved to later in the disease course.

The researchers concluded that ⁹⁰Y-ibritumomab tiuxetan-based conditioning could “continue to play an important role in these settings,” but “improved strategies are needed” for patients with MCL and DLBCL.

Photo by Chad McNeeley

Transplant with radioimmunotherapy (RIT)-based conditioning is a viable treatment option for patients with indolent—but not aggressive—B-cell non-Hodgkin lymphomas (NHLs), according to researchers.

Long-term follow-up data showed “excellent” outcomes in patients with indolent B-NHL who received conditioning with ⁹⁰Y-ibritumomab tiuxetan plus fludarabine and low-dose total body irradiation (TBI) prior to HLA-matched hematopoietic stem cell transplant (HSCT).

However, long-term outcomes were inferior in patients with diffuse large B-cell lymphoma (DLBCL) and mantle cell lymphoma (MCL).

Camille E. Puronen, MD, of the University of Washington in Seattle, and her colleagues reported these results in Biology of Blood and Marrow Transplantation.

The study enrolled 40 patients with high-risk B-NHL. This included DLBCL (n=14), chronic lymphocytic leukemia (CLL; n=10), MCL (n=8), follicular lymphoma (FL; n=6); hairy cell leukemia (HCL; n=1), and marginal zone lymphoma (MZL; n=1).

Patients were treated with 0.4 mCi/kg ⁹⁰Y-ibritumomab tiuxetan, given 2 weeks prior to HSCT, to a maximum dose of 32 mCi.

Patients also received fludarabine at 30 mg/m² on day 5, 6, and 7 prior to HSCT and 2 Gy TBI given on the day of transplant.

In an earlier report, the objective response rate (ORR) was 60%, and 35% of patients had a complete response (CR) or unconfirmed CR.

The researchers said early responses were not associated with disease bulk or chemoresistance, as the ORR was 59% in patients with bulky or chemoresistant disease.

However, responses were associated with histology, as the ORR was 38% in patients with DLBCL, 50% in those with MCL, 83% in those with FL, and 90% in those with CLL.

Long-term survival

In the current report, 11 of 40 patients were still alive at a median follow up of 9 years (range, 5.3 to 10.2). Fourteen patients died of disease progression, and 14 died from complications of HSCT.

The 5-year overall survival (OS) was 40%, and the 5-year progression-free survival (PFS) was 28%.

The best survival rates were in patients with indolent histology. The 5-year PFS was 44% in these patients, and the 5-year OS was 67%.

The researchers said early CR was not associated with long-term survival. However, patients who had at least stable disease (SD) at earlier time points did have the opportunity to achieve long-term survival. All patients who progressed before day 84 were dead by the 1-year mark.

Of the 11 patients who were still alive at a median follow up of 9 years, 4 had a CR or unconfirmed CR at day 84 (FL: 1; CLL: 2; MCL: 1); 6 were in partial response (CLL: 3; FL: 1; MCL: 1; MZL: 1); and 1 patient with FL had SD.

Among the 18 patients with indolent NHL, long-term PFS was observed in 5 of the 7 patients who achieved early CR and 8 of the 11 patients who did not achieve early CR.

Two of the 4 MCL patients who achieved an early CR had long-term PFS, but none of the MCL patients without an early CR had long-term PFS.

Among DLBCL patients, 1 of the 4 who achieved early CR had long-term PFS, but none of the patients without an early CR had long-term PFS. Only 1 DLBCL patient survived beyond 5 years. None survived beyond 8 years.

The researchers said the favorable outcomes in patients with indolent B-NHL are consistent with the known efficacy of RIT and the graft-versus-leukemia effect in these patients.

The team also noted that, since this trial began, several novel agents have been approved for the treatment of indolent B-NHL, which means allogeneic HSCT is often moved to later in the disease course.

The researchers concluded that ⁹⁰Y-ibritumomab tiuxetan-based conditioning could “continue to play an important role in these settings,” but “improved strategies are needed” for patients with MCL and DLBCL.