User login
Bringing you the latest news, research and reviews, exclusive interviews, podcasts, quizzes, and more.
Crizotinib shows responses in pediatric ALCL and IMT
Treatment with the ALK-inhibitor crizotinib produced high response rates in pediatric patients with ALK-positive anaplastic large cell lymphoma (ALCL) and inflammatory myofibroblastic tumors (IMTs), according to phase 2 trial results.
“The robust and sustained clinical responses to crizotinib in patients with relapsed or refractory ALK-driven ALCL and IMT highlight the importance of this oncogene and the sensitivity to ALK inhibition in these diseases,” said Yaël P. Mossé, MD, of Children’s Hospital of Philadelphia, and her associates.
Twenty-six patients with recurrent ALCL and 14 with unresectable IMTs – not older than 22 years – were enrolled. Six of the ALCL patients were treated at 165 mg/m2 (ALCL165) and 20 at 280 mg/m2 (ALCL280), which was found to be the recommended phase 2 dose. Ten of the ALCL280 patients had been treated at an equivalent to this dose in phase 1 and they were included in the phase 2 analysis. Those in the ALCL280 group tended to be older, at a median age of 12.2 years, than the other patients in the study, the investigators reported (J Clin Oncol. 2017 Aug 8 doi: 10.1200/JCO.2017.73.4830).
Eight of the IMT patients were enrolled in a dose-escalation portion of the study, with one receiving a 100 mg/m2 dose, one receiving 165 mg/m2, and the other six receiving 280 mg/m2. The other six were treated at 280 mg/m2. All of the IMT patient results are presented as one pool because those at the lower doses had toxicity and responses similar to those in patients given the higher dose.
Sixteen of 20 patients in the ALCL280 group – 80% – had a complete response, two had a partial response, and two were found to have stable disease. The median duration of treatment in this group was 0.4 years, and the median time to the first partial or complete response was 27 days. In the ALCL165 group, five of six, or 83%, had a complete response, along with one found to have stable disease. This group had a median treatment duration of 2.79 years, and the median time to the first partial or complete response was 26.5 days.
In the IMT group, 5 of 14, or 36%, had a complete response; 7, or 50%, had a partial response, and 2 had stable disease. They received treatment for a median of 1.63 years, and the median time to the first partial or complete response was 28.5 days.
Investigators reported that at least one grade 3 or 4 adverse event occurred in 83% of patients in the ALCL165 group, in all of the patients in the ALCL280 group, and in 71% in the IMT group. Adverse events considered possibly, probably, or definitely related to the study treatment occurred in 33% of the ALCL165 group, in 85% of the ALCL280 group, and in 57% of the IMT group. The most common adverse event was a decreased neutrophil count.
“Notable objective and sustained responses were observed in patients with ALK fusion-positive ALCL and IMT,” the investigators wrote, “establishing a precedent in pediatric oncology for studying the early-phase activity of a targeted agent in a biomarker-selected and histology-independent cohort of patients.
“In the cohort of patients with ALK-positive unresectable IMTs,” they continued, “ALK inhibition was a highly effective therapy and supports consideration of frontline therapy with crizotinib, a strategy that could also be relevant to adults with this rare disease.”
Treatment with the ALK-inhibitor crizotinib produced high response rates in pediatric patients with ALK-positive anaplastic large cell lymphoma (ALCL) and inflammatory myofibroblastic tumors (IMTs), according to phase 2 trial results.
“The robust and sustained clinical responses to crizotinib in patients with relapsed or refractory ALK-driven ALCL and IMT highlight the importance of this oncogene and the sensitivity to ALK inhibition in these diseases,” said Yaël P. Mossé, MD, of Children’s Hospital of Philadelphia, and her associates.
Twenty-six patients with recurrent ALCL and 14 with unresectable IMTs – not older than 22 years – were enrolled. Six of the ALCL patients were treated at 165 mg/m2 (ALCL165) and 20 at 280 mg/m2 (ALCL280), which was found to be the recommended phase 2 dose. Ten of the ALCL280 patients had been treated at an equivalent to this dose in phase 1 and they were included in the phase 2 analysis. Those in the ALCL280 group tended to be older, at a median age of 12.2 years, than the other patients in the study, the investigators reported (J Clin Oncol. 2017 Aug 8 doi: 10.1200/JCO.2017.73.4830).
Eight of the IMT patients were enrolled in a dose-escalation portion of the study, with one receiving a 100 mg/m2 dose, one receiving 165 mg/m2, and the other six receiving 280 mg/m2. The other six were treated at 280 mg/m2. All of the IMT patient results are presented as one pool because those at the lower doses had toxicity and responses similar to those in patients given the higher dose.
Sixteen of 20 patients in the ALCL280 group – 80% – had a complete response, two had a partial response, and two were found to have stable disease. The median duration of treatment in this group was 0.4 years, and the median time to the first partial or complete response was 27 days. In the ALCL165 group, five of six, or 83%, had a complete response, along with one found to have stable disease. This group had a median treatment duration of 2.79 years, and the median time to the first partial or complete response was 26.5 days.
In the IMT group, 5 of 14, or 36%, had a complete response; 7, or 50%, had a partial response, and 2 had stable disease. They received treatment for a median of 1.63 years, and the median time to the first partial or complete response was 28.5 days.
Investigators reported that at least one grade 3 or 4 adverse event occurred in 83% of patients in the ALCL165 group, in all of the patients in the ALCL280 group, and in 71% in the IMT group. Adverse events considered possibly, probably, or definitely related to the study treatment occurred in 33% of the ALCL165 group, in 85% of the ALCL280 group, and in 57% of the IMT group. The most common adverse event was a decreased neutrophil count.
“Notable objective and sustained responses were observed in patients with ALK fusion-positive ALCL and IMT,” the investigators wrote, “establishing a precedent in pediatric oncology for studying the early-phase activity of a targeted agent in a biomarker-selected and histology-independent cohort of patients.
“In the cohort of patients with ALK-positive unresectable IMTs,” they continued, “ALK inhibition was a highly effective therapy and supports consideration of frontline therapy with crizotinib, a strategy that could also be relevant to adults with this rare disease.”
Treatment with the ALK-inhibitor crizotinib produced high response rates in pediatric patients with ALK-positive anaplastic large cell lymphoma (ALCL) and inflammatory myofibroblastic tumors (IMTs), according to phase 2 trial results.
“The robust and sustained clinical responses to crizotinib in patients with relapsed or refractory ALK-driven ALCL and IMT highlight the importance of this oncogene and the sensitivity to ALK inhibition in these diseases,” said Yaël P. Mossé, MD, of Children’s Hospital of Philadelphia, and her associates.
Twenty-six patients with recurrent ALCL and 14 with unresectable IMTs – not older than 22 years – were enrolled. Six of the ALCL patients were treated at 165 mg/m2 (ALCL165) and 20 at 280 mg/m2 (ALCL280), which was found to be the recommended phase 2 dose. Ten of the ALCL280 patients had been treated at an equivalent to this dose in phase 1 and they were included in the phase 2 analysis. Those in the ALCL280 group tended to be older, at a median age of 12.2 years, than the other patients in the study, the investigators reported (J Clin Oncol. 2017 Aug 8 doi: 10.1200/JCO.2017.73.4830).
Eight of the IMT patients were enrolled in a dose-escalation portion of the study, with one receiving a 100 mg/m2 dose, one receiving 165 mg/m2, and the other six receiving 280 mg/m2. The other six were treated at 280 mg/m2. All of the IMT patient results are presented as one pool because those at the lower doses had toxicity and responses similar to those in patients given the higher dose.
Sixteen of 20 patients in the ALCL280 group – 80% – had a complete response, two had a partial response, and two were found to have stable disease. The median duration of treatment in this group was 0.4 years, and the median time to the first partial or complete response was 27 days. In the ALCL165 group, five of six, or 83%, had a complete response, along with one found to have stable disease. This group had a median treatment duration of 2.79 years, and the median time to the first partial or complete response was 26.5 days.
In the IMT group, 5 of 14, or 36%, had a complete response; 7, or 50%, had a partial response, and 2 had stable disease. They received treatment for a median of 1.63 years, and the median time to the first partial or complete response was 28.5 days.
Investigators reported that at least one grade 3 or 4 adverse event occurred in 83% of patients in the ALCL165 group, in all of the patients in the ALCL280 group, and in 71% in the IMT group. Adverse events considered possibly, probably, or definitely related to the study treatment occurred in 33% of the ALCL165 group, in 85% of the ALCL280 group, and in 57% of the IMT group. The most common adverse event was a decreased neutrophil count.
“Notable objective and sustained responses were observed in patients with ALK fusion-positive ALCL and IMT,” the investigators wrote, “establishing a precedent in pediatric oncology for studying the early-phase activity of a targeted agent in a biomarker-selected and histology-independent cohort of patients.
“In the cohort of patients with ALK-positive unresectable IMTs,” they continued, “ALK inhibition was a highly effective therapy and supports consideration of frontline therapy with crizotinib, a strategy that could also be relevant to adults with this rare disease.”
FROM JOURNAL OF CLINICAL ONCOLOGY
Key clinical point: The ALK-inhibitor crizotinib produced good responses in pediatric, relapsed/refractory ALK-positive anaplastic large cell lymphoma and unresectable inflammatory myofibroblastic tumors.
Major finding: Eighty percent of ALCL patients in the high-dose group had a complete response, along with 83% given the lower dose. In the IMT group, 36%, had a complete response.
Data source: A 26-patient trial with a two-stage design, including phase 2 results as well as some data from phase 1, conducted across four U.S. centers.
Disclosures: Several study authors reported financial conflicts, including stock or other ownership, speaking fees, or institutional research funding from Pfizer, Novartis, Johnson & Johnson and other companies.
Solid organ transplantation contributes significantly to incidence of NHL among children and adolescents
Solid organ transplant recipients contribute a disproportionate fraction of pediatric non-Hodgkin lymphoma (NHL) cases, especially diffuse large B-cell lymphoma cases (DLBCL), according to an analysis of data drawn from transplant and cancer registries.
Investigators calculated that the incidence of NHL for the pediatric transplant population was 257 times higher than the general population, after analysis from the U.S. transplant registry and 16 cancer registries from around the country between 1990 and 2012. The incidence of NHL for the pediatric transplant population was 306 cases per 100,000 person-years (95% CI, 271-344), compared to 1.19 cases per 100,000 person-years (95% CI, 1.12-1.27) in the general population. Furthermore, transplant recipients made up a much larger proportion of general population DLBCL cases (7.62%; 95% CI, 6.35%-8.88%).
In the general population, the most common subtypes were DLBCL (25% of cases), Burkitt lymphoma (24%), and precursor cell lymphoblastic lymphoma (20%). Among NHLs diagnosed in transplant recipients, 65% were DLBCL, and 9% were Burkitt lymphoma, whereas there were no cases of precursor cell lymphoblastic lymphoma, reported Elizabeth L. Yanik, PhD, of Washington University, St. Louis, and her associates (Cancer. 2017 Jul 31. doi: 10.1002/cncr.30923).
The increased risk of NHL and other cancers for organ transplant recipients is primarily the result of the immunosuppressant medications administered after transplantation, leading to an increased risk of infection-related cancers, the authors said.
“NHL cases are largely attributable to EBV [Epstein-Barr virus] infections that occur while recipients are immunosuppressed, as evidenced by the high prevalence of EBV detectable in NHL tumors and particularly in cases diagnosed during the heavily immunosuppressed period early after transplantation,” wrote Dr. Yanik and her colleagues. “Patients who experience a primary EBV infection after transplantation are particularly susceptible because transplant recipients have a higher NHL risk if they are seronegative for EBV before transplantation.”
Among those at risk, Dr. Yanik and fellow investigators found transplant patients younger than 5 years were the most susceptible to NHL, making up 19.79% of those diagnosed with DLBCL.
The proportion of NHL in solid organ transplant recipients within the entire pediatric NHL population has risen over time, from 1.66% of the NHL population during 1990-1994 to 3.73% during 2010-2012.
“This trend is driven by the rising prevalence of transplant recipients in the general population and not by increases in NHL risk among transplant recipients,” noted Dr. Yanik and her coauthors. “The proportion of NHL diagnoses attributable to transplant recipients has grown over time, and it is likely that this population will be an important source of pediatric NHL cases in the future.”
This study was partially funded by the National Cancer Institute. One coauthor reported being an employee at GRAIL Inc. No other relevant financial disclosures were reported.
ezimmerman@fronlinemedcom.com
On Twitter @eaztweets
Solid organ transplant recipients contribute a disproportionate fraction of pediatric non-Hodgkin lymphoma (NHL) cases, especially diffuse large B-cell lymphoma cases (DLBCL), according to an analysis of data drawn from transplant and cancer registries.
Investigators calculated that the incidence of NHL for the pediatric transplant population was 257 times higher than the general population, after analysis from the U.S. transplant registry and 16 cancer registries from around the country between 1990 and 2012. The incidence of NHL for the pediatric transplant population was 306 cases per 100,000 person-years (95% CI, 271-344), compared to 1.19 cases per 100,000 person-years (95% CI, 1.12-1.27) in the general population. Furthermore, transplant recipients made up a much larger proportion of general population DLBCL cases (7.62%; 95% CI, 6.35%-8.88%).
In the general population, the most common subtypes were DLBCL (25% of cases), Burkitt lymphoma (24%), and precursor cell lymphoblastic lymphoma (20%). Among NHLs diagnosed in transplant recipients, 65% were DLBCL, and 9% were Burkitt lymphoma, whereas there were no cases of precursor cell lymphoblastic lymphoma, reported Elizabeth L. Yanik, PhD, of Washington University, St. Louis, and her associates (Cancer. 2017 Jul 31. doi: 10.1002/cncr.30923).
The increased risk of NHL and other cancers for organ transplant recipients is primarily the result of the immunosuppressant medications administered after transplantation, leading to an increased risk of infection-related cancers, the authors said.
“NHL cases are largely attributable to EBV [Epstein-Barr virus] infections that occur while recipients are immunosuppressed, as evidenced by the high prevalence of EBV detectable in NHL tumors and particularly in cases diagnosed during the heavily immunosuppressed period early after transplantation,” wrote Dr. Yanik and her colleagues. “Patients who experience a primary EBV infection after transplantation are particularly susceptible because transplant recipients have a higher NHL risk if they are seronegative for EBV before transplantation.”
Among those at risk, Dr. Yanik and fellow investigators found transplant patients younger than 5 years were the most susceptible to NHL, making up 19.79% of those diagnosed with DLBCL.
The proportion of NHL in solid organ transplant recipients within the entire pediatric NHL population has risen over time, from 1.66% of the NHL population during 1990-1994 to 3.73% during 2010-2012.
“This trend is driven by the rising prevalence of transplant recipients in the general population and not by increases in NHL risk among transplant recipients,” noted Dr. Yanik and her coauthors. “The proportion of NHL diagnoses attributable to transplant recipients has grown over time, and it is likely that this population will be an important source of pediatric NHL cases in the future.”
This study was partially funded by the National Cancer Institute. One coauthor reported being an employee at GRAIL Inc. No other relevant financial disclosures were reported.
ezimmerman@fronlinemedcom.com
On Twitter @eaztweets
Solid organ transplant recipients contribute a disproportionate fraction of pediatric non-Hodgkin lymphoma (NHL) cases, especially diffuse large B-cell lymphoma cases (DLBCL), according to an analysis of data drawn from transplant and cancer registries.
Investigators calculated that the incidence of NHL for the pediatric transplant population was 257 times higher than the general population, after analysis from the U.S. transplant registry and 16 cancer registries from around the country between 1990 and 2012. The incidence of NHL for the pediatric transplant population was 306 cases per 100,000 person-years (95% CI, 271-344), compared to 1.19 cases per 100,000 person-years (95% CI, 1.12-1.27) in the general population. Furthermore, transplant recipients made up a much larger proportion of general population DLBCL cases (7.62%; 95% CI, 6.35%-8.88%).
In the general population, the most common subtypes were DLBCL (25% of cases), Burkitt lymphoma (24%), and precursor cell lymphoblastic lymphoma (20%). Among NHLs diagnosed in transplant recipients, 65% were DLBCL, and 9% were Burkitt lymphoma, whereas there were no cases of precursor cell lymphoblastic lymphoma, reported Elizabeth L. Yanik, PhD, of Washington University, St. Louis, and her associates (Cancer. 2017 Jul 31. doi: 10.1002/cncr.30923).
The increased risk of NHL and other cancers for organ transplant recipients is primarily the result of the immunosuppressant medications administered after transplantation, leading to an increased risk of infection-related cancers, the authors said.
“NHL cases are largely attributable to EBV [Epstein-Barr virus] infections that occur while recipients are immunosuppressed, as evidenced by the high prevalence of EBV detectable in NHL tumors and particularly in cases diagnosed during the heavily immunosuppressed period early after transplantation,” wrote Dr. Yanik and her colleagues. “Patients who experience a primary EBV infection after transplantation are particularly susceptible because transplant recipients have a higher NHL risk if they are seronegative for EBV before transplantation.”
Among those at risk, Dr. Yanik and fellow investigators found transplant patients younger than 5 years were the most susceptible to NHL, making up 19.79% of those diagnosed with DLBCL.
The proportion of NHL in solid organ transplant recipients within the entire pediatric NHL population has risen over time, from 1.66% of the NHL population during 1990-1994 to 3.73% during 2010-2012.
“This trend is driven by the rising prevalence of transplant recipients in the general population and not by increases in NHL risk among transplant recipients,” noted Dr. Yanik and her coauthors. “The proportion of NHL diagnoses attributable to transplant recipients has grown over time, and it is likely that this population will be an important source of pediatric NHL cases in the future.”
This study was partially funded by the National Cancer Institute. One coauthor reported being an employee at GRAIL Inc. No other relevant financial disclosures were reported.
ezimmerman@fronlinemedcom.com
On Twitter @eaztweets
FROM CANCER
Key clinical point: Solid organ transplant recipients contribute a disproportionate fraction of pediatric NHL cases, especially DLBCL cases.
Major finding: Incidence of NHL among the pediatric transplant population was 257 times higher at 306 cases per 100,000 person-years (95% CI, 271-344), compared to 1.19 cases per 100,000 person-years (95% CI, 1.12-1.27) in the general pediatric population.
Data source: Retrospective cohort study of children and adolescents in the U.S. transplant registry and 16 cancer registries from around the country between 1990 and 2012.
Disclosures: This study was partially funded by the National Cancer Institute. One coauthor reported being an employee at GRAIL Inc. No other relevant financial disclosures were reported.
Pembrolizumab takes on r/r PMBCL
LUGANO, SWITZERLAND – Patients with relapsed/refractory primary mediastinal large B-cell lymphoma (PMBCL) have few good therapeutic options, but pembrolizumab (Keytruda) may be one of them, an interim analysis from a phase 2 trial suggests.
Six of 10 patients with relapsed/refractory PMBCL for whom autologous stem cell transplantation (ASCT) had failed had responses to salvage therapy with pembrolizumab, including three complete responses (CR) and three partial responses (PR), reported Pier Luigi Zinzani, MD, PhD, of the University of Bologna, Italy.
“In relapsed/refractory primary mediastinal large B-cell lymphoma including heavily pretreated patients in our series, pembrolizumab showed promising antitumor activity in these preliminary data from a phase 2 study, and a manageable safety profile,” Dr. Zinzani said at the International Conference on Malignant Lymphoma.
Although standard cytotoxic chemotherapy regimens are curative in approximately 80% of patients with PMBCL, those with relapsed/refractory disease have a poor prognosis and limited treatment options. In the United States, about 200 patients are diagnosed with relapsed/refractory PMBCL each year, Dr. Zinzani noted.
The rationale for using a programmed death-1 (PD-1) inhibitor such as pembrolizumab is that PMBCL tumors frequently harbor amplifications and/or translocations in the 9p24.1 locus that lead to overexpression of PD ligand 1 (PD-L1) or PD-L2. Pembrolizumab blocks interactions between PD-1 and its ligands.
In the Keynote-013 PMBCL cohort, the objective response rate (ORR) was 48%, including 24% CR.
Keynote 170 investigators are enrolling adults with relapsed/refractory PMBCL who are either ineligible for ASCT following at least two prior lines of therapy, or who had a relapse following a transplant.
Patients receive pembrolizumab 200 mg every 3 weeks. Those who achieve a complete response are allowed to discontinue after a minimum of 24 weeks on study, those with partial response or stable disease are treated for 35 cycles or until disease progression or intolerable toxicities, and those with disease progression are discontinued, but are allowed to remain on study until progression is confirmed.
Responses are assessed by PET and CT scans according to 2007 International Working Group criteria.
Among the 29 patients assessable for efficacy at the time of Dr. Zinzani’s presentations, the best response by blinded central review was 41% (12 patients: 4 CR and 8 PR). Three patients had stable disease, and eight had disease progression. Six patients died or discontinued participation prior to the first assessment.
In all, 16 of 22 patients had reductions in target lesions, and all but one of these patients had reductions greater than 50%.
After a median follow-up of 6.6 months, 10 patients had ongoing responses. The median time to response was 2.9 months. The median duration of response has not been reached.
Of the 10 patients for whom ASCT had failed, three had a CR, and three had a PR. Among 19 ASCT-ineligible patients, one had a CR and five had a PR.
The interim safety analysis included 49 patients. Of this group, only one discontinued treatment because of adverse events. There were 26 treatment-related adverse events, but no treatment-related deaths.
The most frequent adverse events were neutropenia, asthenia, hypothyroidism, and pyrexia.
The study is supported by Merck. Dr Zinzani disclosed serving on advisory boards for several companies.
LUGANO, SWITZERLAND – Patients with relapsed/refractory primary mediastinal large B-cell lymphoma (PMBCL) have few good therapeutic options, but pembrolizumab (Keytruda) may be one of them, an interim analysis from a phase 2 trial suggests.
Six of 10 patients with relapsed/refractory PMBCL for whom autologous stem cell transplantation (ASCT) had failed had responses to salvage therapy with pembrolizumab, including three complete responses (CR) and three partial responses (PR), reported Pier Luigi Zinzani, MD, PhD, of the University of Bologna, Italy.
“In relapsed/refractory primary mediastinal large B-cell lymphoma including heavily pretreated patients in our series, pembrolizumab showed promising antitumor activity in these preliminary data from a phase 2 study, and a manageable safety profile,” Dr. Zinzani said at the International Conference on Malignant Lymphoma.
Although standard cytotoxic chemotherapy regimens are curative in approximately 80% of patients with PMBCL, those with relapsed/refractory disease have a poor prognosis and limited treatment options. In the United States, about 200 patients are diagnosed with relapsed/refractory PMBCL each year, Dr. Zinzani noted.
The rationale for using a programmed death-1 (PD-1) inhibitor such as pembrolizumab is that PMBCL tumors frequently harbor amplifications and/or translocations in the 9p24.1 locus that lead to overexpression of PD ligand 1 (PD-L1) or PD-L2. Pembrolizumab blocks interactions between PD-1 and its ligands.
In the Keynote-013 PMBCL cohort, the objective response rate (ORR) was 48%, including 24% CR.
Keynote 170 investigators are enrolling adults with relapsed/refractory PMBCL who are either ineligible for ASCT following at least two prior lines of therapy, or who had a relapse following a transplant.
Patients receive pembrolizumab 200 mg every 3 weeks. Those who achieve a complete response are allowed to discontinue after a minimum of 24 weeks on study, those with partial response or stable disease are treated for 35 cycles or until disease progression or intolerable toxicities, and those with disease progression are discontinued, but are allowed to remain on study until progression is confirmed.
Responses are assessed by PET and CT scans according to 2007 International Working Group criteria.
Among the 29 patients assessable for efficacy at the time of Dr. Zinzani’s presentations, the best response by blinded central review was 41% (12 patients: 4 CR and 8 PR). Three patients had stable disease, and eight had disease progression. Six patients died or discontinued participation prior to the first assessment.
In all, 16 of 22 patients had reductions in target lesions, and all but one of these patients had reductions greater than 50%.
After a median follow-up of 6.6 months, 10 patients had ongoing responses. The median time to response was 2.9 months. The median duration of response has not been reached.
Of the 10 patients for whom ASCT had failed, three had a CR, and three had a PR. Among 19 ASCT-ineligible patients, one had a CR and five had a PR.
The interim safety analysis included 49 patients. Of this group, only one discontinued treatment because of adverse events. There were 26 treatment-related adverse events, but no treatment-related deaths.
The most frequent adverse events were neutropenia, asthenia, hypothyroidism, and pyrexia.
The study is supported by Merck. Dr Zinzani disclosed serving on advisory boards for several companies.
LUGANO, SWITZERLAND – Patients with relapsed/refractory primary mediastinal large B-cell lymphoma (PMBCL) have few good therapeutic options, but pembrolizumab (Keytruda) may be one of them, an interim analysis from a phase 2 trial suggests.
Six of 10 patients with relapsed/refractory PMBCL for whom autologous stem cell transplantation (ASCT) had failed had responses to salvage therapy with pembrolizumab, including three complete responses (CR) and three partial responses (PR), reported Pier Luigi Zinzani, MD, PhD, of the University of Bologna, Italy.
“In relapsed/refractory primary mediastinal large B-cell lymphoma including heavily pretreated patients in our series, pembrolizumab showed promising antitumor activity in these preliminary data from a phase 2 study, and a manageable safety profile,” Dr. Zinzani said at the International Conference on Malignant Lymphoma.
Although standard cytotoxic chemotherapy regimens are curative in approximately 80% of patients with PMBCL, those with relapsed/refractory disease have a poor prognosis and limited treatment options. In the United States, about 200 patients are diagnosed with relapsed/refractory PMBCL each year, Dr. Zinzani noted.
The rationale for using a programmed death-1 (PD-1) inhibitor such as pembrolizumab is that PMBCL tumors frequently harbor amplifications and/or translocations in the 9p24.1 locus that lead to overexpression of PD ligand 1 (PD-L1) or PD-L2. Pembrolizumab blocks interactions between PD-1 and its ligands.
In the Keynote-013 PMBCL cohort, the objective response rate (ORR) was 48%, including 24% CR.
Keynote 170 investigators are enrolling adults with relapsed/refractory PMBCL who are either ineligible for ASCT following at least two prior lines of therapy, or who had a relapse following a transplant.
Patients receive pembrolizumab 200 mg every 3 weeks. Those who achieve a complete response are allowed to discontinue after a minimum of 24 weeks on study, those with partial response or stable disease are treated for 35 cycles or until disease progression or intolerable toxicities, and those with disease progression are discontinued, but are allowed to remain on study until progression is confirmed.
Responses are assessed by PET and CT scans according to 2007 International Working Group criteria.
Among the 29 patients assessable for efficacy at the time of Dr. Zinzani’s presentations, the best response by blinded central review was 41% (12 patients: 4 CR and 8 PR). Three patients had stable disease, and eight had disease progression. Six patients died or discontinued participation prior to the first assessment.
In all, 16 of 22 patients had reductions in target lesions, and all but one of these patients had reductions greater than 50%.
After a median follow-up of 6.6 months, 10 patients had ongoing responses. The median time to response was 2.9 months. The median duration of response has not been reached.
Of the 10 patients for whom ASCT had failed, three had a CR, and three had a PR. Among 19 ASCT-ineligible patients, one had a CR and five had a PR.
The interim safety analysis included 49 patients. Of this group, only one discontinued treatment because of adverse events. There were 26 treatment-related adverse events, but no treatment-related deaths.
The most frequent adverse events were neutropenia, asthenia, hypothyroidism, and pyrexia.
The study is supported by Merck. Dr Zinzani disclosed serving on advisory boards for several companies.
AT 14-ICML
Key clinical point: Poor-prognosis relapsed/refractory primary mediastinal large B-cell lymphoma may respond to PD-1 inhibition.
Major finding: The best response by blinded central review was 41% (12 patients: 4 complete and 8 partial responses).
Data source: Interim analysis from a phase 2 study with 29 patients evaluable for efficacy, 49 for safety.
Disclosures: Merck supports the study. Dr Zinzani disclosed serving on advisory boards for several companies.
IMiD/Anti-CD20 combo induces complete responses in r/r NHL
Lugano, Switzerland – A combination of obinutuzumab (Gazyva) and the experimental immunomodulatory agent CC-122 showed “clinically meaningful” activity against relapsed/refractory diffuse large B cell lymphoma (DLBCL) and indolent non-Hodgkin lymphoma (NHL) in a phase 1b study.
Among 38 patients with heavily pretreated, relapsed/refractory DLBCL, follicular lymphoma (FL), or marginal zone lymphoma (MZL), the overall response rate was 66%, including 12 patients (32%) with a complete response (CR), reported Jean-Marie Michot, MD, from the Goustave-Roussy Cancer Center in Villejuif, France.
CC-122 is a thalidomide analog that shares a molecular target with its cousin lenalidomide (Revlimid). Both molecules bind to the protein cereblon to cause degradation of the lymphoid transcription factors Aiolos and Ikaros.
As a single agent, CC-122 has been shown to have immunomodulatory effects on T-cell and natural killer (NK)–cell functions and has shown clinical activity in heavily pretreated patients with relapsed refractory NHL, including various cell-of-origin–based DLBCL subtypes, Dr, Michot said.
In preclinical studies, the combination of CC-122 and obinutuzumab, an anti-CD20 monoclonal antibody, has shown synergistic effects against FL and greater antilymphoma effects against DLBCL than either agent alone, he added.
In a multicenter, open-label, phase 1b dose-escalation and expansion study, investigators enrolled 19 patients with FL or MZL for whom at least one prior regimen had failed and 19 patients with relapsed/refractory DLBCL following at least two prior regimens and failed autologous stem cell transplant.
The patients received oral CC-122 at different dose levels for 5 of 7 days in each 28 day treatment cycle, plus intravenous obinutuzumab 1000 mg on days 2, 8, and 15 of cycle 1 and day 1 of cycles 2 through 8.
Responses were assessed according to International Working Group 2007 revised response criteria for malignant lymphoma.
Among all 38 patients, 25 (66%) had a response. Responses consisted of 12 CR (3 in patients with DLBCL, and 9 in patients with FL/MZL) and 13 partial responses (six and seven patients, respectively),
The median time to best response was 57 days. Responses were seen in 23 of the 30 patients who received CC-122 at dose level of 3 mg or higher.
“To date, patients receiving CC-122 at a dose of 3 mg and higher have the best and more durable responses to CC-122 plus obinutuzumab,” Dr. Michot said.
Patients generally tolerated the combination well. The most common grade 3 or 4 adverse events were hematologic and included grade 4 febrile neutropenia in two patients. Two patients discontinued treatment because of adverse events.
There was a dose-limiting toxicity, grade 4 neutropenia in one patient who received CC-122 at the 3 mg dose level, and one death from a tumor flare reaction in a patient treated at the 4 mg dose level.
The dose-escalation arm of the study has completed, and investigators are enrolling patients in a dose expansion phase at the 3 mg level.
The study was sponsored by Celgene. Hoffman La-Roche contributed obinutuzumab for the study. Dr. Michot reported serving as an advisor to Bristol-Myers Squibb and receiving travel grants from BMS, Pfizer, and Roche. Seven coauthors are Celgene employees and stockholders.
Lugano, Switzerland – A combination of obinutuzumab (Gazyva) and the experimental immunomodulatory agent CC-122 showed “clinically meaningful” activity against relapsed/refractory diffuse large B cell lymphoma (DLBCL) and indolent non-Hodgkin lymphoma (NHL) in a phase 1b study.
Among 38 patients with heavily pretreated, relapsed/refractory DLBCL, follicular lymphoma (FL), or marginal zone lymphoma (MZL), the overall response rate was 66%, including 12 patients (32%) with a complete response (CR), reported Jean-Marie Michot, MD, from the Goustave-Roussy Cancer Center in Villejuif, France.
CC-122 is a thalidomide analog that shares a molecular target with its cousin lenalidomide (Revlimid). Both molecules bind to the protein cereblon to cause degradation of the lymphoid transcription factors Aiolos and Ikaros.
As a single agent, CC-122 has been shown to have immunomodulatory effects on T-cell and natural killer (NK)–cell functions and has shown clinical activity in heavily pretreated patients with relapsed refractory NHL, including various cell-of-origin–based DLBCL subtypes, Dr, Michot said.
In preclinical studies, the combination of CC-122 and obinutuzumab, an anti-CD20 monoclonal antibody, has shown synergistic effects against FL and greater antilymphoma effects against DLBCL than either agent alone, he added.
In a multicenter, open-label, phase 1b dose-escalation and expansion study, investigators enrolled 19 patients with FL or MZL for whom at least one prior regimen had failed and 19 patients with relapsed/refractory DLBCL following at least two prior regimens and failed autologous stem cell transplant.
The patients received oral CC-122 at different dose levels for 5 of 7 days in each 28 day treatment cycle, plus intravenous obinutuzumab 1000 mg on days 2, 8, and 15 of cycle 1 and day 1 of cycles 2 through 8.
Responses were assessed according to International Working Group 2007 revised response criteria for malignant lymphoma.
Among all 38 patients, 25 (66%) had a response. Responses consisted of 12 CR (3 in patients with DLBCL, and 9 in patients with FL/MZL) and 13 partial responses (six and seven patients, respectively),
The median time to best response was 57 days. Responses were seen in 23 of the 30 patients who received CC-122 at dose level of 3 mg or higher.
“To date, patients receiving CC-122 at a dose of 3 mg and higher have the best and more durable responses to CC-122 plus obinutuzumab,” Dr. Michot said.
Patients generally tolerated the combination well. The most common grade 3 or 4 adverse events were hematologic and included grade 4 febrile neutropenia in two patients. Two patients discontinued treatment because of adverse events.
There was a dose-limiting toxicity, grade 4 neutropenia in one patient who received CC-122 at the 3 mg dose level, and one death from a tumor flare reaction in a patient treated at the 4 mg dose level.
The dose-escalation arm of the study has completed, and investigators are enrolling patients in a dose expansion phase at the 3 mg level.
The study was sponsored by Celgene. Hoffman La-Roche contributed obinutuzumab for the study. Dr. Michot reported serving as an advisor to Bristol-Myers Squibb and receiving travel grants from BMS, Pfizer, and Roche. Seven coauthors are Celgene employees and stockholders.
Lugano, Switzerland – A combination of obinutuzumab (Gazyva) and the experimental immunomodulatory agent CC-122 showed “clinically meaningful” activity against relapsed/refractory diffuse large B cell lymphoma (DLBCL) and indolent non-Hodgkin lymphoma (NHL) in a phase 1b study.
Among 38 patients with heavily pretreated, relapsed/refractory DLBCL, follicular lymphoma (FL), or marginal zone lymphoma (MZL), the overall response rate was 66%, including 12 patients (32%) with a complete response (CR), reported Jean-Marie Michot, MD, from the Goustave-Roussy Cancer Center in Villejuif, France.
CC-122 is a thalidomide analog that shares a molecular target with its cousin lenalidomide (Revlimid). Both molecules bind to the protein cereblon to cause degradation of the lymphoid transcription factors Aiolos and Ikaros.
As a single agent, CC-122 has been shown to have immunomodulatory effects on T-cell and natural killer (NK)–cell functions and has shown clinical activity in heavily pretreated patients with relapsed refractory NHL, including various cell-of-origin–based DLBCL subtypes, Dr, Michot said.
In preclinical studies, the combination of CC-122 and obinutuzumab, an anti-CD20 monoclonal antibody, has shown synergistic effects against FL and greater antilymphoma effects against DLBCL than either agent alone, he added.
In a multicenter, open-label, phase 1b dose-escalation and expansion study, investigators enrolled 19 patients with FL or MZL for whom at least one prior regimen had failed and 19 patients with relapsed/refractory DLBCL following at least two prior regimens and failed autologous stem cell transplant.
The patients received oral CC-122 at different dose levels for 5 of 7 days in each 28 day treatment cycle, plus intravenous obinutuzumab 1000 mg on days 2, 8, and 15 of cycle 1 and day 1 of cycles 2 through 8.
Responses were assessed according to International Working Group 2007 revised response criteria for malignant lymphoma.
Among all 38 patients, 25 (66%) had a response. Responses consisted of 12 CR (3 in patients with DLBCL, and 9 in patients with FL/MZL) and 13 partial responses (six and seven patients, respectively),
The median time to best response was 57 days. Responses were seen in 23 of the 30 patients who received CC-122 at dose level of 3 mg or higher.
“To date, patients receiving CC-122 at a dose of 3 mg and higher have the best and more durable responses to CC-122 plus obinutuzumab,” Dr. Michot said.
Patients generally tolerated the combination well. The most common grade 3 or 4 adverse events were hematologic and included grade 4 febrile neutropenia in two patients. Two patients discontinued treatment because of adverse events.
There was a dose-limiting toxicity, grade 4 neutropenia in one patient who received CC-122 at the 3 mg dose level, and one death from a tumor flare reaction in a patient treated at the 4 mg dose level.
The dose-escalation arm of the study has completed, and investigators are enrolling patients in a dose expansion phase at the 3 mg level.
The study was sponsored by Celgene. Hoffman La-Roche contributed obinutuzumab for the study. Dr. Michot reported serving as an advisor to Bristol-Myers Squibb and receiving travel grants from BMS, Pfizer, and Roche. Seven coauthors are Celgene employees and stockholders.
AT 14-ICML
Key clinical point: A combination of the experimental immunomodulator CC-122 and obinutuzumab showed significant activity against relapsed/refractory non-Hodgkin lymphoma.
Major finding: The overall response rate was 66%, including 32% complete responses.
Data source: A multicenter open-label phase 1b dose-escalation study in 19 patients with DLBCL and 19 with follicular lymphoma or marginal zone lymphoma.
Disclosures: The study was sponsored by Celgene. Hoffman La-Roche contributed obinutuzumab for the study. Dr. Michot reported serving as an advisor to Bristol-Myers Squibb and receiving travel grants from BMS, Pfizer, and Roche. Seven coauthors are Celgene employees and stockholders.
Copanlisib makes inroads against relapsed/refractory follicular lymphoma
LUGANO, SWITZERLAND – Copanlisib, an investigational intravenous inhibitor of phosphatidylinositol 3-kinase (PI3K), was associated with “promising” efficacy and a better safety profile than has been seen with oral PI3K inhibitors in patients with relapsed or refractory indolent lymphomas.
In a phase 2 trial of the drug as monotherapy in patients with indolent lymphomas, copanlisib was associated with an overall response rate of 58.6% among 104 patients with follicular lymphoma (FL), including 14.4% complete responses (CR) and 44.2% partial responses (PR), reported Martin Dreyling, MD, of the Universität München-Grosshadern in Munich, Germany.
“The favorable risk-benefit profile of this compound suggests further [need for] testing in follicular lymphoma. My personal interpretation is that the different safety profile is due to the intermittent dosing and the IV application, avoiding adverse cause-effect both in the gut and the liver,” he said at the 14th International Conference on Malignant Lymphoma.
Dr. Dreyling noted that the oral PI3K inhibitor idelalisib (Zydelig) is approved for the treatment of patients with relapsed chronic lymphocytic leukemia in combination with rituximab and in patients with relapsed FL or small lymphocytic lymphomas (SLL) who have received at least two prior lines of systemic therapy. This agent, however, carries a black box warning about fatal and serious toxicities, including hepatic events, severe diarrhea, colitis, pneumonitis, infections, and intestinal perforation.
Copanlisib inhibits all isoforms of P13K but is predominantly active against the alpha and delta isoforms of the kinase. The alpha form, expressed in many cell types, is involved in insulin signaling and angiogenesis and in resistance mechanisms to lymphoma. The delta form, expressed in leukocytes, is involved in B-cell signaling, development, and survival, making PIK3 an attractive target, Dr. Dreyling explained.
The study included patients with indolent B-cell lymphomas, including FL grades 1-3a, marginal zone lymphoma, SLL, or lymphoplasmacytic lymphoma/Waldenstrom macroglobulinemia (LPL/WM) for whom at least two prior lines of therapy had failed.
The patients received copanlisib 60 mg IV on days 1, 8, and 15 of each 28-day cycle until disease progression or unacceptable toxicity.
Of 142 assigned to and started on treatment, 46 patients (32.3%) remained on treatment at the time of data cutoff. Of the 96 patients (67.7%) who discontinued, 35 did so because of adverse events, 36 discontinued for radiologic or clinical evidence of progression, 16 withdrew, 5 were discontinued on the treating physician’s decision, and 4 stopped for other, unspecified reasons.
Among all 142 patients, the median duration of therapy was 22 weeks and the median number of cycles was 5.5. In all, 26.1% of patients required a dosage reduction to 45 mg, and 5.6% required reduction to 30 mg.
As noted, the objective tumor response rate (ORR) among patients was 58.6% for 104 patients with FL. For the 23 patients with marginal zone lymphoma, the ORR was 69.6%, consisting of two complete and 14 partial responses. Among eight patients with SLL, there were six partial responses and no complete responses. For the six patients with LPL/WM, there was one partial response.
The overall median duration of response was 22.6 months. Among patients with refractory disease and in all patients with FL the median duration of response was 12.2 months.
The median progression-free survival after 24 months of follow-up was 11.2 months for all patients. The median overall survival has not been reached.
The most frequent adverse events of grade 3 or 4 were hyperglycemia in 40.1% (33.1% grade 3 and 7.0% grade 4) and hypertension in 22.5% (all grade 3).
Grade 3 diarrhea, a significant problem with idelalisib, occurred in 4.2% of patients, and there were no grade 4 events.
Grade 3 pneumonitis was seen in two patients, and one had grade 4 colitis. There were three drug related deaths, including one patient each from lung infection, respiratory failure, or thromboembolic event..
The study was supported by Bayer. Dr. Dreyling disclosed receiving honoraria from the company and serving on a scientific/advisory board for the company.
LUGANO, SWITZERLAND – Copanlisib, an investigational intravenous inhibitor of phosphatidylinositol 3-kinase (PI3K), was associated with “promising” efficacy and a better safety profile than has been seen with oral PI3K inhibitors in patients with relapsed or refractory indolent lymphomas.
In a phase 2 trial of the drug as monotherapy in patients with indolent lymphomas, copanlisib was associated with an overall response rate of 58.6% among 104 patients with follicular lymphoma (FL), including 14.4% complete responses (CR) and 44.2% partial responses (PR), reported Martin Dreyling, MD, of the Universität München-Grosshadern in Munich, Germany.
“The favorable risk-benefit profile of this compound suggests further [need for] testing in follicular lymphoma. My personal interpretation is that the different safety profile is due to the intermittent dosing and the IV application, avoiding adverse cause-effect both in the gut and the liver,” he said at the 14th International Conference on Malignant Lymphoma.
Dr. Dreyling noted that the oral PI3K inhibitor idelalisib (Zydelig) is approved for the treatment of patients with relapsed chronic lymphocytic leukemia in combination with rituximab and in patients with relapsed FL or small lymphocytic lymphomas (SLL) who have received at least two prior lines of systemic therapy. This agent, however, carries a black box warning about fatal and serious toxicities, including hepatic events, severe diarrhea, colitis, pneumonitis, infections, and intestinal perforation.
Copanlisib inhibits all isoforms of P13K but is predominantly active against the alpha and delta isoforms of the kinase. The alpha form, expressed in many cell types, is involved in insulin signaling and angiogenesis and in resistance mechanisms to lymphoma. The delta form, expressed in leukocytes, is involved in B-cell signaling, development, and survival, making PIK3 an attractive target, Dr. Dreyling explained.
The study included patients with indolent B-cell lymphomas, including FL grades 1-3a, marginal zone lymphoma, SLL, or lymphoplasmacytic lymphoma/Waldenstrom macroglobulinemia (LPL/WM) for whom at least two prior lines of therapy had failed.
The patients received copanlisib 60 mg IV on days 1, 8, and 15 of each 28-day cycle until disease progression or unacceptable toxicity.
Of 142 assigned to and started on treatment, 46 patients (32.3%) remained on treatment at the time of data cutoff. Of the 96 patients (67.7%) who discontinued, 35 did so because of adverse events, 36 discontinued for radiologic or clinical evidence of progression, 16 withdrew, 5 were discontinued on the treating physician’s decision, and 4 stopped for other, unspecified reasons.
Among all 142 patients, the median duration of therapy was 22 weeks and the median number of cycles was 5.5. In all, 26.1% of patients required a dosage reduction to 45 mg, and 5.6% required reduction to 30 mg.
As noted, the objective tumor response rate (ORR) among patients was 58.6% for 104 patients with FL. For the 23 patients with marginal zone lymphoma, the ORR was 69.6%, consisting of two complete and 14 partial responses. Among eight patients with SLL, there were six partial responses and no complete responses. For the six patients with LPL/WM, there was one partial response.
The overall median duration of response was 22.6 months. Among patients with refractory disease and in all patients with FL the median duration of response was 12.2 months.
The median progression-free survival after 24 months of follow-up was 11.2 months for all patients. The median overall survival has not been reached.
The most frequent adverse events of grade 3 or 4 were hyperglycemia in 40.1% (33.1% grade 3 and 7.0% grade 4) and hypertension in 22.5% (all grade 3).
Grade 3 diarrhea, a significant problem with idelalisib, occurred in 4.2% of patients, and there were no grade 4 events.
Grade 3 pneumonitis was seen in two patients, and one had grade 4 colitis. There were three drug related deaths, including one patient each from lung infection, respiratory failure, or thromboembolic event..
The study was supported by Bayer. Dr. Dreyling disclosed receiving honoraria from the company and serving on a scientific/advisory board for the company.
LUGANO, SWITZERLAND – Copanlisib, an investigational intravenous inhibitor of phosphatidylinositol 3-kinase (PI3K), was associated with “promising” efficacy and a better safety profile than has been seen with oral PI3K inhibitors in patients with relapsed or refractory indolent lymphomas.
In a phase 2 trial of the drug as monotherapy in patients with indolent lymphomas, copanlisib was associated with an overall response rate of 58.6% among 104 patients with follicular lymphoma (FL), including 14.4% complete responses (CR) and 44.2% partial responses (PR), reported Martin Dreyling, MD, of the Universität München-Grosshadern in Munich, Germany.
“The favorable risk-benefit profile of this compound suggests further [need for] testing in follicular lymphoma. My personal interpretation is that the different safety profile is due to the intermittent dosing and the IV application, avoiding adverse cause-effect both in the gut and the liver,” he said at the 14th International Conference on Malignant Lymphoma.
Dr. Dreyling noted that the oral PI3K inhibitor idelalisib (Zydelig) is approved for the treatment of patients with relapsed chronic lymphocytic leukemia in combination with rituximab and in patients with relapsed FL or small lymphocytic lymphomas (SLL) who have received at least two prior lines of systemic therapy. This agent, however, carries a black box warning about fatal and serious toxicities, including hepatic events, severe diarrhea, colitis, pneumonitis, infections, and intestinal perforation.
Copanlisib inhibits all isoforms of P13K but is predominantly active against the alpha and delta isoforms of the kinase. The alpha form, expressed in many cell types, is involved in insulin signaling and angiogenesis and in resistance mechanisms to lymphoma. The delta form, expressed in leukocytes, is involved in B-cell signaling, development, and survival, making PIK3 an attractive target, Dr. Dreyling explained.
The study included patients with indolent B-cell lymphomas, including FL grades 1-3a, marginal zone lymphoma, SLL, or lymphoplasmacytic lymphoma/Waldenstrom macroglobulinemia (LPL/WM) for whom at least two prior lines of therapy had failed.
The patients received copanlisib 60 mg IV on days 1, 8, and 15 of each 28-day cycle until disease progression or unacceptable toxicity.
Of 142 assigned to and started on treatment, 46 patients (32.3%) remained on treatment at the time of data cutoff. Of the 96 patients (67.7%) who discontinued, 35 did so because of adverse events, 36 discontinued for radiologic or clinical evidence of progression, 16 withdrew, 5 were discontinued on the treating physician’s decision, and 4 stopped for other, unspecified reasons.
Among all 142 patients, the median duration of therapy was 22 weeks and the median number of cycles was 5.5. In all, 26.1% of patients required a dosage reduction to 45 mg, and 5.6% required reduction to 30 mg.
As noted, the objective tumor response rate (ORR) among patients was 58.6% for 104 patients with FL. For the 23 patients with marginal zone lymphoma, the ORR was 69.6%, consisting of two complete and 14 partial responses. Among eight patients with SLL, there were six partial responses and no complete responses. For the six patients with LPL/WM, there was one partial response.
The overall median duration of response was 22.6 months. Among patients with refractory disease and in all patients with FL the median duration of response was 12.2 months.
The median progression-free survival after 24 months of follow-up was 11.2 months for all patients. The median overall survival has not been reached.
The most frequent adverse events of grade 3 or 4 were hyperglycemia in 40.1% (33.1% grade 3 and 7.0% grade 4) and hypertension in 22.5% (all grade 3).
Grade 3 diarrhea, a significant problem with idelalisib, occurred in 4.2% of patients, and there were no grade 4 events.
Grade 3 pneumonitis was seen in two patients, and one had grade 4 colitis. There were three drug related deaths, including one patient each from lung infection, respiratory failure, or thromboembolic event..
The study was supported by Bayer. Dr. Dreyling disclosed receiving honoraria from the company and serving on a scientific/advisory board for the company.
AT 14-ICML
Key clinical point: Copanlisib, an intravenous PI3K inhibitor, was active against relapsed/refractory follicular lymphoma (FL).
Major finding: The overall response rate among 104 patients was 58.6%
Data source: A multicenter international phase 2 study in patients with relapsed/refractory indolent lymphomas
Disclosures: The study was supported by Bayer. Dr. Dreyling disclosed receiving honoraria from the company and serving on a scientific/advisory board for the company.
R-CHOP matched more intense regimens for overall survival in high-risk, untreated DLBCL
High-dose chemotherapy with upfront autologous stem cell transplantation did not meaningfully improve survival at 5 years in a phase 3 trial of 399 patients under age 66 years with intermediate to high– or high-risk untreated diffuse large B-cell lymphoma.
Rates of treatment failure-free survival at 2 years were 71% for patients who received rituximab dose–dense chemotherapy followed by autologous stem cell transplantation (ASCT) and 62% for patients who received only the rituximab regimen (hazard ratio, 0.65; 95% confidence interval, 0.47-0.91; P = .01), Annalisa Chiappella, MD, of Azienda Ospedaliero Universitaria Città della Salute e della Scienza di Torino (Italy) reported with her associates in Lancet Oncology.
Patients with diffuse large B-cell lymphoma, whose age-adjusted International Prognostic Index (aa-IPI) scores are 2 or 3 (intermediate to high or high risk), have a poor prognosis despite standard treatment with R-CHOP (rituximab, cyclophosphamide, vincristine, doxorubicin, and prednisone). Given a historic lack of late-phase studies of this population, the researchers designed a multicenter, open-label, randomized phase 3 trial comparing rituximab dose–dense chemotherapy without ASCT with a shorter rituximab regimen followed by consolidation with R-MAD (rituximab plus high-dose cytarabine plus mitoxantrone plus dexamethasone) and high-dose BEAM chemotherapy (carmustine, etoposide, cytarabine, and melphalan) plus ASCT in untreated patients aged 18-65 years.
Rituximab-based chemotherapy consisted of 14-day cycles of either standard R-CHOP or an intensified R-CHOP–like regimen that increased the doses of cyclophosphamide (1200 mg/m2) and doxorubicin (70 mg/m2), the investigators noted (Lancet Oncol. 2017 Jun 28. doi: 10.1016/S1470-2045[17]30444-8).
In all, 96 patients were assigned to receive only standard R-CHOP (eight cycles), 100 patients were assigned to high-dose R-CHOP (six cycles), 103 patients were assigned to standard R-CHOP (four cycles) plus R-MAD (2 cycles) plus BEAM plus ASCT, and 96 patients were assigned to high-dose R-CHOP (four cycles) plus the same sequence of R-MAD, BEAM, and ASCT. A total of 325 (81%) patients completed treatment, and the median follow-up period was 72 months (interquartile range, 57 to 88 months). There was no evidence that treatment efficacy varied by age, sex, bone marrow involvement, or other histology results, but only the intermediate-high risk patients experienced a benefit in terms of failure-free survival.
Grade 3 or higher adverse hematologic events affected 183 (92%) ASCT recipients and 135 (68%) patients who received only R-CHOP or high-dose R-CHOP. Nonhematologic adverse events affected 45% and 16% of patients, respectively, and were mostly gastrointestinal in nature. Of recipients of ASCT, 12 stopped treatment because of infections, prolonged neutropenia, gastrointestinal symptoms, or cardiac abnormalities, and two patients who did not undergo ASCT stopped treatment because of infections or prolonged neutropenia. Three (13%) patients died from treatment-related causes, including eight patients in the transplantation groups and five of the other patients.
Previous studies have reported benefits from intensified R-CHOP–like regimens in diffuse large B-cell lymphoma, but these trials included low-risk patients.
“Our study enrolled only intermediate to high–risk or high-risk patients, and the findings do not support the hypothesis that increasing the dose of R-CHOP improves outcomes in patients with diffuse large B-cell lymphoma who are at high risk,” they wrote. “The addition of novel drugs, such as lenalidomide, ibrutinib, bortezomib, and others, to standard R-CHOP regimens has been reported in phase 1 or 2 studies with promising results in high-risk patients, leading to ongoing phase 3 randomized trials to assess the efficacy of these strategies. While awaiting the results of these randomized studies, the standard treatment in patients with diffuse large B-cell lymphoma at intermediate to high and high risk remains chemoimmunotherapy based on the standard R-CHOP regimen.”
Fondazione Italiana Linfomi funded the study. Dr. Chiappelli and several coinvestigators disclosed ties to Amgen, Celgene, Janssen, Nanostring, Pfizer, and other companies.
High-dose chemotherapy with upfront autologous stem cell transplantation did not meaningfully improve survival at 5 years in a phase 3 trial of 399 patients under age 66 years with intermediate to high– or high-risk untreated diffuse large B-cell lymphoma.
Rates of treatment failure-free survival at 2 years were 71% for patients who received rituximab dose–dense chemotherapy followed by autologous stem cell transplantation (ASCT) and 62% for patients who received only the rituximab regimen (hazard ratio, 0.65; 95% confidence interval, 0.47-0.91; P = .01), Annalisa Chiappella, MD, of Azienda Ospedaliero Universitaria Città della Salute e della Scienza di Torino (Italy) reported with her associates in Lancet Oncology.
Patients with diffuse large B-cell lymphoma, whose age-adjusted International Prognostic Index (aa-IPI) scores are 2 or 3 (intermediate to high or high risk), have a poor prognosis despite standard treatment with R-CHOP (rituximab, cyclophosphamide, vincristine, doxorubicin, and prednisone). Given a historic lack of late-phase studies of this population, the researchers designed a multicenter, open-label, randomized phase 3 trial comparing rituximab dose–dense chemotherapy without ASCT with a shorter rituximab regimen followed by consolidation with R-MAD (rituximab plus high-dose cytarabine plus mitoxantrone plus dexamethasone) and high-dose BEAM chemotherapy (carmustine, etoposide, cytarabine, and melphalan) plus ASCT in untreated patients aged 18-65 years.
Rituximab-based chemotherapy consisted of 14-day cycles of either standard R-CHOP or an intensified R-CHOP–like regimen that increased the doses of cyclophosphamide (1200 mg/m2) and doxorubicin (70 mg/m2), the investigators noted (Lancet Oncol. 2017 Jun 28. doi: 10.1016/S1470-2045[17]30444-8).
In all, 96 patients were assigned to receive only standard R-CHOP (eight cycles), 100 patients were assigned to high-dose R-CHOP (six cycles), 103 patients were assigned to standard R-CHOP (four cycles) plus R-MAD (2 cycles) plus BEAM plus ASCT, and 96 patients were assigned to high-dose R-CHOP (four cycles) plus the same sequence of R-MAD, BEAM, and ASCT. A total of 325 (81%) patients completed treatment, and the median follow-up period was 72 months (interquartile range, 57 to 88 months). There was no evidence that treatment efficacy varied by age, sex, bone marrow involvement, or other histology results, but only the intermediate-high risk patients experienced a benefit in terms of failure-free survival.
Grade 3 or higher adverse hematologic events affected 183 (92%) ASCT recipients and 135 (68%) patients who received only R-CHOP or high-dose R-CHOP. Nonhematologic adverse events affected 45% and 16% of patients, respectively, and were mostly gastrointestinal in nature. Of recipients of ASCT, 12 stopped treatment because of infections, prolonged neutropenia, gastrointestinal symptoms, or cardiac abnormalities, and two patients who did not undergo ASCT stopped treatment because of infections or prolonged neutropenia. Three (13%) patients died from treatment-related causes, including eight patients in the transplantation groups and five of the other patients.
Previous studies have reported benefits from intensified R-CHOP–like regimens in diffuse large B-cell lymphoma, but these trials included low-risk patients.
“Our study enrolled only intermediate to high–risk or high-risk patients, and the findings do not support the hypothesis that increasing the dose of R-CHOP improves outcomes in patients with diffuse large B-cell lymphoma who are at high risk,” they wrote. “The addition of novel drugs, such as lenalidomide, ibrutinib, bortezomib, and others, to standard R-CHOP regimens has been reported in phase 1 or 2 studies with promising results in high-risk patients, leading to ongoing phase 3 randomized trials to assess the efficacy of these strategies. While awaiting the results of these randomized studies, the standard treatment in patients with diffuse large B-cell lymphoma at intermediate to high and high risk remains chemoimmunotherapy based on the standard R-CHOP regimen.”
Fondazione Italiana Linfomi funded the study. Dr. Chiappelli and several coinvestigators disclosed ties to Amgen, Celgene, Janssen, Nanostring, Pfizer, and other companies.
High-dose chemotherapy with upfront autologous stem cell transplantation did not meaningfully improve survival at 5 years in a phase 3 trial of 399 patients under age 66 years with intermediate to high– or high-risk untreated diffuse large B-cell lymphoma.
Rates of treatment failure-free survival at 2 years were 71% for patients who received rituximab dose–dense chemotherapy followed by autologous stem cell transplantation (ASCT) and 62% for patients who received only the rituximab regimen (hazard ratio, 0.65; 95% confidence interval, 0.47-0.91; P = .01), Annalisa Chiappella, MD, of Azienda Ospedaliero Universitaria Città della Salute e della Scienza di Torino (Italy) reported with her associates in Lancet Oncology.
Patients with diffuse large B-cell lymphoma, whose age-adjusted International Prognostic Index (aa-IPI) scores are 2 or 3 (intermediate to high or high risk), have a poor prognosis despite standard treatment with R-CHOP (rituximab, cyclophosphamide, vincristine, doxorubicin, and prednisone). Given a historic lack of late-phase studies of this population, the researchers designed a multicenter, open-label, randomized phase 3 trial comparing rituximab dose–dense chemotherapy without ASCT with a shorter rituximab regimen followed by consolidation with R-MAD (rituximab plus high-dose cytarabine plus mitoxantrone plus dexamethasone) and high-dose BEAM chemotherapy (carmustine, etoposide, cytarabine, and melphalan) plus ASCT in untreated patients aged 18-65 years.
Rituximab-based chemotherapy consisted of 14-day cycles of either standard R-CHOP or an intensified R-CHOP–like regimen that increased the doses of cyclophosphamide (1200 mg/m2) and doxorubicin (70 mg/m2), the investigators noted (Lancet Oncol. 2017 Jun 28. doi: 10.1016/S1470-2045[17]30444-8).
In all, 96 patients were assigned to receive only standard R-CHOP (eight cycles), 100 patients were assigned to high-dose R-CHOP (six cycles), 103 patients were assigned to standard R-CHOP (four cycles) plus R-MAD (2 cycles) plus BEAM plus ASCT, and 96 patients were assigned to high-dose R-CHOP (four cycles) plus the same sequence of R-MAD, BEAM, and ASCT. A total of 325 (81%) patients completed treatment, and the median follow-up period was 72 months (interquartile range, 57 to 88 months). There was no evidence that treatment efficacy varied by age, sex, bone marrow involvement, or other histology results, but only the intermediate-high risk patients experienced a benefit in terms of failure-free survival.
Grade 3 or higher adverse hematologic events affected 183 (92%) ASCT recipients and 135 (68%) patients who received only R-CHOP or high-dose R-CHOP. Nonhematologic adverse events affected 45% and 16% of patients, respectively, and were mostly gastrointestinal in nature. Of recipients of ASCT, 12 stopped treatment because of infections, prolonged neutropenia, gastrointestinal symptoms, or cardiac abnormalities, and two patients who did not undergo ASCT stopped treatment because of infections or prolonged neutropenia. Three (13%) patients died from treatment-related causes, including eight patients in the transplantation groups and five of the other patients.
Previous studies have reported benefits from intensified R-CHOP–like regimens in diffuse large B-cell lymphoma, but these trials included low-risk patients.
“Our study enrolled only intermediate to high–risk or high-risk patients, and the findings do not support the hypothesis that increasing the dose of R-CHOP improves outcomes in patients with diffuse large B-cell lymphoma who are at high risk,” they wrote. “The addition of novel drugs, such as lenalidomide, ibrutinib, bortezomib, and others, to standard R-CHOP regimens has been reported in phase 1 or 2 studies with promising results in high-risk patients, leading to ongoing phase 3 randomized trials to assess the efficacy of these strategies. While awaiting the results of these randomized studies, the standard treatment in patients with diffuse large B-cell lymphoma at intermediate to high and high risk remains chemoimmunotherapy based on the standard R-CHOP regimen.”
Fondazione Italiana Linfomi funded the study. Dr. Chiappelli and several coinvestigators disclosed ties to Amgen, Celgene, Janssen, Nanostring, Pfizer, and other companies.
FROM LANCET ONCOLOGY
Key clinical point: Pending phase 3 trial results for novel drugs, R-CHOP should remain the standard treatment for high-risk diffuse large B-cell lymphoma.
Major finding: For patients given rituximab dose-dense chemotherapy followed by chemoimmunotherapy consolidation and autologous stem cell transplantation, versus rituximab dose-dense chemotherapy alone, 5-year rates of overall survival were 78% and 77%, respectively,
Data source: A randomized, open-label, phase 3 study of 399 patients, aged 18-65 years.
Disclosures: Fondazione Italiana Linfomi funded the study. Dr. Chiappelli and several coinvestigators disclosed ties to Amgen, Celgene, Janssen, Nanostring, Pfizer, and other companies.
Tazemetostat active against follicular lymphoma with EZH2 mutation
LUGANO, SWITZERLAND – Tazemetostat, a first-in-class experimental agent that inhibits an oncogenic protein, shows efficacy in patients with heavily pretreated, relapsed/refractory follicular lymphoma (FL) and diffuse large B cell lymphoma (DLBCL), interim results from a phase II study suggest.
Among patients with relapsed/refractory FL who had mutations in EZH2 (enhancer of zeste homolog 2), a member of a family of proteins that are involved in epigenetic gene silencing, the overall response rate (ORR) was 92%, reported Franck Morschhauser, MD, PhD, of the University of Lille, France.
“What we observed is a four-fold increase in [ORR in] follicular lymphoma-mutated patients compared to wild-type patients, a two-fold increase in DLBCL patients mutated compared to wild-type patients,” he said.
“But if we had focused [only] on the actionable mutation, we would have missed those other complete responders in the wild-type setting,” he added.
EZH2, an epigenetic regulator of gene expression, had been shown in preclinical studies to play an important role in multiple forms of cancers, and activating mutations of EZH2 have been shown to be oncogenic drivers in approximately 20% of FL and germinal center B-cell–like DLBCL, Dr. Morschhauser explained.
EZH2 has also been shown to be over-expressed in leukemia-initiating cells in patients with chronic myeloid leukemia, and EZH2 inhibitors are being explored as a possible therapy for patients with chronic myeloid leukemia that has become resistant to tyrosine kinase inhibitors.
Large multicenter study
Dr. Morschhauser reported interim results from a global, multi-center open-label study of tazemetostat in six cohorts of patients with relapsed/refractory FL (two monotherapy cohorts of 45 patients each) or DLBCL (three monotherapy cohorts of 60 patients each). A sixth cohort consisting of 70 patients with DLBCL treated with tazemetostat and prednisolone was added in 2017.
In the ongoing trial, patients receive oral tazemetostat 800 mg twice daily until disease progression or withdrawal from study, and are being followed for ORR, progression-free survival, overall survival, duration-of response, safety, and pharmacokinetics.
The longest follow-up at the time of data cutoff was approximately 18 months. Among 13 evaluable patients with FL with EZH2 mutations, the ORR was 92%, including one complete response (CR) and 11 partial responses (PR). In contrast, the ORR for 54 patients with FL and wild-type EZH2 was 28%, consisting of three CRs and 11 PRs. One patient with mutated EZH2 and 23 with wild-type EZH2 had stable disease.
Among 17 patients with DLBCL and EZH2 mutations, the ORR was 29%, consisting of 5 PR. For 119 patients with wild-type EZH2, the ORR was 15%, consisting of 10 CR and 8 PR. Six patients with mutations and 22 with wild-type EZH2 had stable disease.
Among the patients with FL, 75% had significant reduction in tumor burden.
The time to response ranged from 2 months to 1 year, with a median of approximately 4 months.
The variability in time to response “makes it a little bit tricky to calculate response duration,” Dr. Morschhauser said.
The drug had a “favorable” safety profile, with treatment-related adverse events of grade 3 or greater in more than 5% of patients including thrombocytopenias in 6% of patients, anemias in 4%, and neutropenias in 6%. Treatment-emergent adverse events leading to dose reductions occurred in 4% of patients, and those leading to drug discontinuation or study withdrawal occurred in 12% of patients.
In a retrospective analysis, the investigators performed molecular profiling studies using next-generation sequencing to look for predictors of response to tazemetostat. They found that patients most likely to respond to tazemetostat were those with activating mutations in EZH2 and MYD88. In contrast, patients with mutations HIST1H1E or MYC were not likely to respond.
Thomas E. Witzig, MD, of the Mayo Clinic in Rochester, Minn., the invited discussant, said that the study is important because “it provides proof of principle that attacking the methylation issue, attacking one of these enzymes, is very important and can produce single-agent responses.
“It also demonstrates the value of mutation status, and this trial knowledge of that mutation status has actually changed the trial design, so that now they are only putting patients on with mutations,” he said.
The trial also raises the possibility of targeting other parts of the methylation pathway to treat cancer, he added.
The study was sponsored by Epizyme, the maker of tazemetostat. Dr. Morschhauser disclosed receiving honoraria from and serving on advisory boards for both companies. Dr. Witzig has disclosed grants for clinical trials from Novartis and Wyeth, and he has served on advisory boards for Cephalon, Novartis, and Wyeth.
LUGANO, SWITZERLAND – Tazemetostat, a first-in-class experimental agent that inhibits an oncogenic protein, shows efficacy in patients with heavily pretreated, relapsed/refractory follicular lymphoma (FL) and diffuse large B cell lymphoma (DLBCL), interim results from a phase II study suggest.
Among patients with relapsed/refractory FL who had mutations in EZH2 (enhancer of zeste homolog 2), a member of a family of proteins that are involved in epigenetic gene silencing, the overall response rate (ORR) was 92%, reported Franck Morschhauser, MD, PhD, of the University of Lille, France.
“What we observed is a four-fold increase in [ORR in] follicular lymphoma-mutated patients compared to wild-type patients, a two-fold increase in DLBCL patients mutated compared to wild-type patients,” he said.
“But if we had focused [only] on the actionable mutation, we would have missed those other complete responders in the wild-type setting,” he added.
EZH2, an epigenetic regulator of gene expression, had been shown in preclinical studies to play an important role in multiple forms of cancers, and activating mutations of EZH2 have been shown to be oncogenic drivers in approximately 20% of FL and germinal center B-cell–like DLBCL, Dr. Morschhauser explained.
EZH2 has also been shown to be over-expressed in leukemia-initiating cells in patients with chronic myeloid leukemia, and EZH2 inhibitors are being explored as a possible therapy for patients with chronic myeloid leukemia that has become resistant to tyrosine kinase inhibitors.
Large multicenter study
Dr. Morschhauser reported interim results from a global, multi-center open-label study of tazemetostat in six cohorts of patients with relapsed/refractory FL (two monotherapy cohorts of 45 patients each) or DLBCL (three monotherapy cohorts of 60 patients each). A sixth cohort consisting of 70 patients with DLBCL treated with tazemetostat and prednisolone was added in 2017.
In the ongoing trial, patients receive oral tazemetostat 800 mg twice daily until disease progression or withdrawal from study, and are being followed for ORR, progression-free survival, overall survival, duration-of response, safety, and pharmacokinetics.
The longest follow-up at the time of data cutoff was approximately 18 months. Among 13 evaluable patients with FL with EZH2 mutations, the ORR was 92%, including one complete response (CR) and 11 partial responses (PR). In contrast, the ORR for 54 patients with FL and wild-type EZH2 was 28%, consisting of three CRs and 11 PRs. One patient with mutated EZH2 and 23 with wild-type EZH2 had stable disease.
Among 17 patients with DLBCL and EZH2 mutations, the ORR was 29%, consisting of 5 PR. For 119 patients with wild-type EZH2, the ORR was 15%, consisting of 10 CR and 8 PR. Six patients with mutations and 22 with wild-type EZH2 had stable disease.
Among the patients with FL, 75% had significant reduction in tumor burden.
The time to response ranged from 2 months to 1 year, with a median of approximately 4 months.
The variability in time to response “makes it a little bit tricky to calculate response duration,” Dr. Morschhauser said.
The drug had a “favorable” safety profile, with treatment-related adverse events of grade 3 or greater in more than 5% of patients including thrombocytopenias in 6% of patients, anemias in 4%, and neutropenias in 6%. Treatment-emergent adverse events leading to dose reductions occurred in 4% of patients, and those leading to drug discontinuation or study withdrawal occurred in 12% of patients.
In a retrospective analysis, the investigators performed molecular profiling studies using next-generation sequencing to look for predictors of response to tazemetostat. They found that patients most likely to respond to tazemetostat were those with activating mutations in EZH2 and MYD88. In contrast, patients with mutations HIST1H1E or MYC were not likely to respond.
Thomas E. Witzig, MD, of the Mayo Clinic in Rochester, Minn., the invited discussant, said that the study is important because “it provides proof of principle that attacking the methylation issue, attacking one of these enzymes, is very important and can produce single-agent responses.
“It also demonstrates the value of mutation status, and this trial knowledge of that mutation status has actually changed the trial design, so that now they are only putting patients on with mutations,” he said.
The trial also raises the possibility of targeting other parts of the methylation pathway to treat cancer, he added.
The study was sponsored by Epizyme, the maker of tazemetostat. Dr. Morschhauser disclosed receiving honoraria from and serving on advisory boards for both companies. Dr. Witzig has disclosed grants for clinical trials from Novartis and Wyeth, and he has served on advisory boards for Cephalon, Novartis, and Wyeth.
LUGANO, SWITZERLAND – Tazemetostat, a first-in-class experimental agent that inhibits an oncogenic protein, shows efficacy in patients with heavily pretreated, relapsed/refractory follicular lymphoma (FL) and diffuse large B cell lymphoma (DLBCL), interim results from a phase II study suggest.
Among patients with relapsed/refractory FL who had mutations in EZH2 (enhancer of zeste homolog 2), a member of a family of proteins that are involved in epigenetic gene silencing, the overall response rate (ORR) was 92%, reported Franck Morschhauser, MD, PhD, of the University of Lille, France.
“What we observed is a four-fold increase in [ORR in] follicular lymphoma-mutated patients compared to wild-type patients, a two-fold increase in DLBCL patients mutated compared to wild-type patients,” he said.
“But if we had focused [only] on the actionable mutation, we would have missed those other complete responders in the wild-type setting,” he added.
EZH2, an epigenetic regulator of gene expression, had been shown in preclinical studies to play an important role in multiple forms of cancers, and activating mutations of EZH2 have been shown to be oncogenic drivers in approximately 20% of FL and germinal center B-cell–like DLBCL, Dr. Morschhauser explained.
EZH2 has also been shown to be over-expressed in leukemia-initiating cells in patients with chronic myeloid leukemia, and EZH2 inhibitors are being explored as a possible therapy for patients with chronic myeloid leukemia that has become resistant to tyrosine kinase inhibitors.
Large multicenter study
Dr. Morschhauser reported interim results from a global, multi-center open-label study of tazemetostat in six cohorts of patients with relapsed/refractory FL (two monotherapy cohorts of 45 patients each) or DLBCL (three monotherapy cohorts of 60 patients each). A sixth cohort consisting of 70 patients with DLBCL treated with tazemetostat and prednisolone was added in 2017.
In the ongoing trial, patients receive oral tazemetostat 800 mg twice daily until disease progression or withdrawal from study, and are being followed for ORR, progression-free survival, overall survival, duration-of response, safety, and pharmacokinetics.
The longest follow-up at the time of data cutoff was approximately 18 months. Among 13 evaluable patients with FL with EZH2 mutations, the ORR was 92%, including one complete response (CR) and 11 partial responses (PR). In contrast, the ORR for 54 patients with FL and wild-type EZH2 was 28%, consisting of three CRs and 11 PRs. One patient with mutated EZH2 and 23 with wild-type EZH2 had stable disease.
Among 17 patients with DLBCL and EZH2 mutations, the ORR was 29%, consisting of 5 PR. For 119 patients with wild-type EZH2, the ORR was 15%, consisting of 10 CR and 8 PR. Six patients with mutations and 22 with wild-type EZH2 had stable disease.
Among the patients with FL, 75% had significant reduction in tumor burden.
The time to response ranged from 2 months to 1 year, with a median of approximately 4 months.
The variability in time to response “makes it a little bit tricky to calculate response duration,” Dr. Morschhauser said.
The drug had a “favorable” safety profile, with treatment-related adverse events of grade 3 or greater in more than 5% of patients including thrombocytopenias in 6% of patients, anemias in 4%, and neutropenias in 6%. Treatment-emergent adverse events leading to dose reductions occurred in 4% of patients, and those leading to drug discontinuation or study withdrawal occurred in 12% of patients.
In a retrospective analysis, the investigators performed molecular profiling studies using next-generation sequencing to look for predictors of response to tazemetostat. They found that patients most likely to respond to tazemetostat were those with activating mutations in EZH2 and MYD88. In contrast, patients with mutations HIST1H1E or MYC were not likely to respond.
Thomas E. Witzig, MD, of the Mayo Clinic in Rochester, Minn., the invited discussant, said that the study is important because “it provides proof of principle that attacking the methylation issue, attacking one of these enzymes, is very important and can produce single-agent responses.
“It also demonstrates the value of mutation status, and this trial knowledge of that mutation status has actually changed the trial design, so that now they are only putting patients on with mutations,” he said.
The trial also raises the possibility of targeting other parts of the methylation pathway to treat cancer, he added.
The study was sponsored by Epizyme, the maker of tazemetostat. Dr. Morschhauser disclosed receiving honoraria from and serving on advisory boards for both companies. Dr. Witzig has disclosed grants for clinical trials from Novartis and Wyeth, and he has served on advisory boards for Cephalon, Novartis, and Wyeth.
AT 14-ICML
Key clinical point: The experimental drug tazemetostat induced responses in patients with heavily pretreated follicular lymphoma (FL) with mutations in EZH2.
Major finding: The overall response rate among patients with FL with mutated EZH2 was 92%.
Data source: Multicenter, open-label phase II study in patients with relapsed/refractory FL and diffuse large B cell lymphoma.
Disclosures: The study is sponsored by Epizyme. Dr. Morschhauser disclosed receiving honoraria from and serving on advisory boards for both companies. Dr. Witzig has disclosed grants for clinical trials from Novartis and Wyeth, and he has served on advisory boards for Cephalon, Novartis, and Wyeth.
Ibrutinib/buparlisib looks good for relapsed mantle cell lymphoma
LUGANO, SWITZERLAND – A combination of the Bruton’s tyrosine kinase (BTK) ibrutinib (Imbruvica) and the pan-phosphoinositide 3-kinase (PI3K) inhibitor buparlisib showed clinical activity superior to that of single-agent ibrutinib in patients with relapsed/refractory mantle cell lymphoma (MCL).
In a phase I/IB dose escalation study and expansion cohort testing the combination in patients with diffuse large B cell lymphoma (DLBCL), follicular lymphoma, and MCL, the overall response rate (ORR) among patients with MCL was 100%, consisting of complete responses (CR) in 8 of 11 patients, and partial responses (PR) in 3 patients, reported Connie Lee Batlevi, MD, of Memorial Sloan Kettering Cancer Center in New York.
In contrast, the response rate to ibrutinib monotherapy among patients with relapsed MCL is around 20%, she said.
Preclinical studies have demonstrated synergism between BTK inhibitors and PI3K inhibitors in B-cell non-Hodgkin lymphoma (NHL), prompting the investigators to look into the combination in patients with relapsed or refractory DLBCL, follicular lymphoma (FL), and MCL.
They enrolled 25 patients (9 with DLBCL, 5 with FL, and 11 with MCL). The patients received escalating doses of once daily ibrutinib and buparlisib in three dose levels (ibrutinib 420-560 mg; buparlisib 80-100 mg). Dose level 3, consisting of ibrutinib 560 mg and buparlisib 100 mg, was selected for dose expansion based on one of six patients developing a dose-limiting toxicity.
Using the Lugano Response Criteria, the overall ORR (all histologies) was 52%. Among nine patients with DLBCL, the ORR was 11%, with one CR and no PR. Among five patients with FL, the ORR was 20%, consisting of one CR and no PR.
Among 11 patients with MCL, however, the ORR was far more impressive, at 100%, including eight CR and three PR. No patients with MCL had either stable or progressive disease.
Under the RECIL (International Working Group) criteria, the ORR was 48% including one CR each for DLBCL and FL, and eight CR and two PR for patients with MCL.
In the safety analysis, there were two dose-limiting toxicities in the lowest and highest dose groups, but none at dose level 2 (ibrutinib 560 mg and buparlisib 80 mg).
Grade 3 or greater adverse events occurred in 63% of patients. The most common events were hyperglycemia and rash in 19% each, and diarrhea, anorexia, and neurologic changes in 11% each,
The grade 3 neurologic changes included depression, agitation, mood swings, confusion and memory impairment, all of which resolved after buparlisib was withdrawn.
Dr. Batlevi showed scans of two patients with representative clinical responses in MCL. One 55-year-old man with blastoid MCL who had relapsed 18 months after frontline therapy with ofatumumab and bendamustine had near total clearance of lesions after two cycles of ibrutinib and buparlisib. He remains in CR after 12 months on the combination.
A second patient, a 77-year-old man with MCL that relapsed 10 years after R-CHOP and rituximab maintenance followed by autologous stem cell transplant, showed a complete response upon restaging after two cycles of ibrutinib/buparlisib.
The investigators are currently enrolling patients for phase IB expansions, with the goal of better estimating the safety and efficacy of the combination.
Memorial Sloan Kettering Cancer Center sponsored the study, with support from Janssen and Novartis. Dr. Batlevi reported no conflicts of interest.
LUGANO, SWITZERLAND – A combination of the Bruton’s tyrosine kinase (BTK) ibrutinib (Imbruvica) and the pan-phosphoinositide 3-kinase (PI3K) inhibitor buparlisib showed clinical activity superior to that of single-agent ibrutinib in patients with relapsed/refractory mantle cell lymphoma (MCL).
In a phase I/IB dose escalation study and expansion cohort testing the combination in patients with diffuse large B cell lymphoma (DLBCL), follicular lymphoma, and MCL, the overall response rate (ORR) among patients with MCL was 100%, consisting of complete responses (CR) in 8 of 11 patients, and partial responses (PR) in 3 patients, reported Connie Lee Batlevi, MD, of Memorial Sloan Kettering Cancer Center in New York.
In contrast, the response rate to ibrutinib monotherapy among patients with relapsed MCL is around 20%, she said.
Preclinical studies have demonstrated synergism between BTK inhibitors and PI3K inhibitors in B-cell non-Hodgkin lymphoma (NHL), prompting the investigators to look into the combination in patients with relapsed or refractory DLBCL, follicular lymphoma (FL), and MCL.
They enrolled 25 patients (9 with DLBCL, 5 with FL, and 11 with MCL). The patients received escalating doses of once daily ibrutinib and buparlisib in three dose levels (ibrutinib 420-560 mg; buparlisib 80-100 mg). Dose level 3, consisting of ibrutinib 560 mg and buparlisib 100 mg, was selected for dose expansion based on one of six patients developing a dose-limiting toxicity.
Using the Lugano Response Criteria, the overall ORR (all histologies) was 52%. Among nine patients with DLBCL, the ORR was 11%, with one CR and no PR. Among five patients with FL, the ORR was 20%, consisting of one CR and no PR.
Among 11 patients with MCL, however, the ORR was far more impressive, at 100%, including eight CR and three PR. No patients with MCL had either stable or progressive disease.
Under the RECIL (International Working Group) criteria, the ORR was 48% including one CR each for DLBCL and FL, and eight CR and two PR for patients with MCL.
In the safety analysis, there were two dose-limiting toxicities in the lowest and highest dose groups, but none at dose level 2 (ibrutinib 560 mg and buparlisib 80 mg).
Grade 3 or greater adverse events occurred in 63% of patients. The most common events were hyperglycemia and rash in 19% each, and diarrhea, anorexia, and neurologic changes in 11% each,
The grade 3 neurologic changes included depression, agitation, mood swings, confusion and memory impairment, all of which resolved after buparlisib was withdrawn.
Dr. Batlevi showed scans of two patients with representative clinical responses in MCL. One 55-year-old man with blastoid MCL who had relapsed 18 months after frontline therapy with ofatumumab and bendamustine had near total clearance of lesions after two cycles of ibrutinib and buparlisib. He remains in CR after 12 months on the combination.
A second patient, a 77-year-old man with MCL that relapsed 10 years after R-CHOP and rituximab maintenance followed by autologous stem cell transplant, showed a complete response upon restaging after two cycles of ibrutinib/buparlisib.
The investigators are currently enrolling patients for phase IB expansions, with the goal of better estimating the safety and efficacy of the combination.
Memorial Sloan Kettering Cancer Center sponsored the study, with support from Janssen and Novartis. Dr. Batlevi reported no conflicts of interest.
LUGANO, SWITZERLAND – A combination of the Bruton’s tyrosine kinase (BTK) ibrutinib (Imbruvica) and the pan-phosphoinositide 3-kinase (PI3K) inhibitor buparlisib showed clinical activity superior to that of single-agent ibrutinib in patients with relapsed/refractory mantle cell lymphoma (MCL).
In a phase I/IB dose escalation study and expansion cohort testing the combination in patients with diffuse large B cell lymphoma (DLBCL), follicular lymphoma, and MCL, the overall response rate (ORR) among patients with MCL was 100%, consisting of complete responses (CR) in 8 of 11 patients, and partial responses (PR) in 3 patients, reported Connie Lee Batlevi, MD, of Memorial Sloan Kettering Cancer Center in New York.
In contrast, the response rate to ibrutinib monotherapy among patients with relapsed MCL is around 20%, she said.
Preclinical studies have demonstrated synergism between BTK inhibitors and PI3K inhibitors in B-cell non-Hodgkin lymphoma (NHL), prompting the investigators to look into the combination in patients with relapsed or refractory DLBCL, follicular lymphoma (FL), and MCL.
They enrolled 25 patients (9 with DLBCL, 5 with FL, and 11 with MCL). The patients received escalating doses of once daily ibrutinib and buparlisib in three dose levels (ibrutinib 420-560 mg; buparlisib 80-100 mg). Dose level 3, consisting of ibrutinib 560 mg and buparlisib 100 mg, was selected for dose expansion based on one of six patients developing a dose-limiting toxicity.
Using the Lugano Response Criteria, the overall ORR (all histologies) was 52%. Among nine patients with DLBCL, the ORR was 11%, with one CR and no PR. Among five patients with FL, the ORR was 20%, consisting of one CR and no PR.
Among 11 patients with MCL, however, the ORR was far more impressive, at 100%, including eight CR and three PR. No patients with MCL had either stable or progressive disease.
Under the RECIL (International Working Group) criteria, the ORR was 48% including one CR each for DLBCL and FL, and eight CR and two PR for patients with MCL.
In the safety analysis, there were two dose-limiting toxicities in the lowest and highest dose groups, but none at dose level 2 (ibrutinib 560 mg and buparlisib 80 mg).
Grade 3 or greater adverse events occurred in 63% of patients. The most common events were hyperglycemia and rash in 19% each, and diarrhea, anorexia, and neurologic changes in 11% each,
The grade 3 neurologic changes included depression, agitation, mood swings, confusion and memory impairment, all of which resolved after buparlisib was withdrawn.
Dr. Batlevi showed scans of two patients with representative clinical responses in MCL. One 55-year-old man with blastoid MCL who had relapsed 18 months after frontline therapy with ofatumumab and bendamustine had near total clearance of lesions after two cycles of ibrutinib and buparlisib. He remains in CR after 12 months on the combination.
A second patient, a 77-year-old man with MCL that relapsed 10 years after R-CHOP and rituximab maintenance followed by autologous stem cell transplant, showed a complete response upon restaging after two cycles of ibrutinib/buparlisib.
The investigators are currently enrolling patients for phase IB expansions, with the goal of better estimating the safety and efficacy of the combination.
Memorial Sloan Kettering Cancer Center sponsored the study, with support from Janssen and Novartis. Dr. Batlevi reported no conflicts of interest.
AT 14-ICML
Key clinical point: The combination of ibrutinib and buparlisib showed efficacy against mantle cell lymphoma in a dose-escalation and safety study,
Major finding: The overall response rate to the combination among 11 patients with relapsed MCL was 100%.
Data source: Open label phase I/IB study of 25 patients with B-cell lymphomas.
Disclosures: Memorial Sloan Kettering Cancer Center sponsored the study, with support from Janssen and Novartis. Dr. Batlevi reported no conflicts of interest.
Pembrolizumab + rituximab boost response rates in relapsed follicular lymphoma
LUGANO, SWITZERLAND – A novel combination of the anti-programmed death 1 (PD-1) checkpoint inhibitor pembrolizumab (Keytruda) and the anti-CD20 monoclonal antibody rituximab was associated with a high overall response rate (ORR) in patients with relapsed follicular lymphoma in a phase II clinical trial.
Among 20 patients evaluable for efficacy, the overall response rate to the combination was 65%, including 50% complete responses (CR) reported Loretta J. Nastoupil, MD, of the University of Texas MD Anderson Cancer Center in Houston.
“Follicular lymphoma is probably one of the best examples of targeting the immune system and also one of the earliest examples. Over the last few years we’ve learned a great deal about the different mechanisms of not only negative impact on infiltrating T cells, but also immune escape and T-cell exhaustion,” she said at the International Conference on Malignant Lymphoma.
Although biopsies of follicular lymphoma tumors have demonstrated infiltration of anti-tumor T cells, these cells are typically impeded by immune checkpoints, including PD-1 and its ligand (PD-L1).
The use of anti-PD-1 checkpoint inhibitors such as pembrolizumab has been shown to enhance the function of antitumor T cells in follicular lymphoma, and blocking PD-1 on natural killer cells enhances the antibody-dependent cell-mediated cytotoxicity of the natural killer cells, she said.
Because rituximab, a mainstay of therapy for non-Hodgkin lymphomas, induces antibody-dependent cell-mediated cytotoxicity, the investigators reasoned that combining it with pembrolizumab would simultaneously and synergistically stimulate activation of innate and adaptive immunity.
They designed a phase II, single-arm study in 30 patients with relapsed follicular lymphoma following one or more prior lines of therapy. The patients also had to have rituximab-sensitive disease, defined as a complete response (CR) or partial response lasting for at least 6 months following the most recent rituximab-containing therapy.
The patients were treated with rituximab 375 mg/m2 IV on days 1, 8, 15, and 22 of cycle 1, and pembrolizumab 200 mg IV every 3 weeks for up to 16 cycles starting on day 2 of cycle 1.
The investigators expected that the combination would improve ORR, the primary endpoint, to at least 60%, compared with 40% for historical controls treated with repeat courses of rituximab.
At the data cutoff for the interim analysis, 32 patients had been enrolled, 30 were evaluable for safety, and 20 for efficacy after a median follow-up of 8.2 months.
Among the 20 patients (median age 64) in the efficacy analysis, 10 (50%) had a CR, and 3 (15%) had a partial response, for an ORR of 65%. Three additional patients had stable disease, and four had disease progression as best responses.
Among the patients with CRs, the duration of response ranged from nearly 275 days to more than 600 days.
“This does appear to be durable, and it is time dependent in terms of response. We did see early response, and we also saw deepening of response over time,” Dr. Nastoupil said.
Four patients were discontinued from the study because of immune-related adverse events. All four patients had achieved a CR at the time of study removal, and all four have ongoing CRs.
Among the 30 patients evaluable for safety, there were no grade 4 adverse events, no deaths, and few grade 3 events. Most events were grade 1 or 2, and included fatigue, eye pain/blurred vision/watery eye, nausea and vomiting, diarrhea dyspnea, rash, cough, and lymphopenia.
The investigators also looked at potential biomarkers for response, including PD-L1 expression in tumors prior to treatment. They found in samples from three patients who went on to achieve CRs that PD-L1 expression in tumor cells was low, ranging from 0% to 8%, suggesting that PD-L1 expression may not be necessary to generate a response with the combination.
They then looked at the association between CD8-positive T effector cells and responses in 12 patients, and found that patients with higher levels of expression had better ORR and CR rates.
“These interim results warrant further investigation of this combination in follicular lymphoma, and an expansion to include patients with refractory follicular lymphoma is planned,” Dr. Nastoupil concluded.
The Leukemia & Lymphoma Society supported the study. Dr Nastoupil has disclosed consulting fees from Celgene and contracted research for Abbvie, Janssen, and TG Therapeutics.
LUGANO, SWITZERLAND – A novel combination of the anti-programmed death 1 (PD-1) checkpoint inhibitor pembrolizumab (Keytruda) and the anti-CD20 monoclonal antibody rituximab was associated with a high overall response rate (ORR) in patients with relapsed follicular lymphoma in a phase II clinical trial.
Among 20 patients evaluable for efficacy, the overall response rate to the combination was 65%, including 50% complete responses (CR) reported Loretta J. Nastoupil, MD, of the University of Texas MD Anderson Cancer Center in Houston.
“Follicular lymphoma is probably one of the best examples of targeting the immune system and also one of the earliest examples. Over the last few years we’ve learned a great deal about the different mechanisms of not only negative impact on infiltrating T cells, but also immune escape and T-cell exhaustion,” she said at the International Conference on Malignant Lymphoma.
Although biopsies of follicular lymphoma tumors have demonstrated infiltration of anti-tumor T cells, these cells are typically impeded by immune checkpoints, including PD-1 and its ligand (PD-L1).
The use of anti-PD-1 checkpoint inhibitors such as pembrolizumab has been shown to enhance the function of antitumor T cells in follicular lymphoma, and blocking PD-1 on natural killer cells enhances the antibody-dependent cell-mediated cytotoxicity of the natural killer cells, she said.
Because rituximab, a mainstay of therapy for non-Hodgkin lymphomas, induces antibody-dependent cell-mediated cytotoxicity, the investigators reasoned that combining it with pembrolizumab would simultaneously and synergistically stimulate activation of innate and adaptive immunity.
They designed a phase II, single-arm study in 30 patients with relapsed follicular lymphoma following one or more prior lines of therapy. The patients also had to have rituximab-sensitive disease, defined as a complete response (CR) or partial response lasting for at least 6 months following the most recent rituximab-containing therapy.
The patients were treated with rituximab 375 mg/m2 IV on days 1, 8, 15, and 22 of cycle 1, and pembrolizumab 200 mg IV every 3 weeks for up to 16 cycles starting on day 2 of cycle 1.
The investigators expected that the combination would improve ORR, the primary endpoint, to at least 60%, compared with 40% for historical controls treated with repeat courses of rituximab.
At the data cutoff for the interim analysis, 32 patients had been enrolled, 30 were evaluable for safety, and 20 for efficacy after a median follow-up of 8.2 months.
Among the 20 patients (median age 64) in the efficacy analysis, 10 (50%) had a CR, and 3 (15%) had a partial response, for an ORR of 65%. Three additional patients had stable disease, and four had disease progression as best responses.
Among the patients with CRs, the duration of response ranged from nearly 275 days to more than 600 days.
“This does appear to be durable, and it is time dependent in terms of response. We did see early response, and we also saw deepening of response over time,” Dr. Nastoupil said.
Four patients were discontinued from the study because of immune-related adverse events. All four patients had achieved a CR at the time of study removal, and all four have ongoing CRs.
Among the 30 patients evaluable for safety, there were no grade 4 adverse events, no deaths, and few grade 3 events. Most events were grade 1 or 2, and included fatigue, eye pain/blurred vision/watery eye, nausea and vomiting, diarrhea dyspnea, rash, cough, and lymphopenia.
The investigators also looked at potential biomarkers for response, including PD-L1 expression in tumors prior to treatment. They found in samples from three patients who went on to achieve CRs that PD-L1 expression in tumor cells was low, ranging from 0% to 8%, suggesting that PD-L1 expression may not be necessary to generate a response with the combination.
They then looked at the association between CD8-positive T effector cells and responses in 12 patients, and found that patients with higher levels of expression had better ORR and CR rates.
“These interim results warrant further investigation of this combination in follicular lymphoma, and an expansion to include patients with refractory follicular lymphoma is planned,” Dr. Nastoupil concluded.
The Leukemia & Lymphoma Society supported the study. Dr Nastoupil has disclosed consulting fees from Celgene and contracted research for Abbvie, Janssen, and TG Therapeutics.
LUGANO, SWITZERLAND – A novel combination of the anti-programmed death 1 (PD-1) checkpoint inhibitor pembrolizumab (Keytruda) and the anti-CD20 monoclonal antibody rituximab was associated with a high overall response rate (ORR) in patients with relapsed follicular lymphoma in a phase II clinical trial.
Among 20 patients evaluable for efficacy, the overall response rate to the combination was 65%, including 50% complete responses (CR) reported Loretta J. Nastoupil, MD, of the University of Texas MD Anderson Cancer Center in Houston.
“Follicular lymphoma is probably one of the best examples of targeting the immune system and also one of the earliest examples. Over the last few years we’ve learned a great deal about the different mechanisms of not only negative impact on infiltrating T cells, but also immune escape and T-cell exhaustion,” she said at the International Conference on Malignant Lymphoma.
Although biopsies of follicular lymphoma tumors have demonstrated infiltration of anti-tumor T cells, these cells are typically impeded by immune checkpoints, including PD-1 and its ligand (PD-L1).
The use of anti-PD-1 checkpoint inhibitors such as pembrolizumab has been shown to enhance the function of antitumor T cells in follicular lymphoma, and blocking PD-1 on natural killer cells enhances the antibody-dependent cell-mediated cytotoxicity of the natural killer cells, she said.
Because rituximab, a mainstay of therapy for non-Hodgkin lymphomas, induces antibody-dependent cell-mediated cytotoxicity, the investigators reasoned that combining it with pembrolizumab would simultaneously and synergistically stimulate activation of innate and adaptive immunity.
They designed a phase II, single-arm study in 30 patients with relapsed follicular lymphoma following one or more prior lines of therapy. The patients also had to have rituximab-sensitive disease, defined as a complete response (CR) or partial response lasting for at least 6 months following the most recent rituximab-containing therapy.
The patients were treated with rituximab 375 mg/m2 IV on days 1, 8, 15, and 22 of cycle 1, and pembrolizumab 200 mg IV every 3 weeks for up to 16 cycles starting on day 2 of cycle 1.
The investigators expected that the combination would improve ORR, the primary endpoint, to at least 60%, compared with 40% for historical controls treated with repeat courses of rituximab.
At the data cutoff for the interim analysis, 32 patients had been enrolled, 30 were evaluable for safety, and 20 for efficacy after a median follow-up of 8.2 months.
Among the 20 patients (median age 64) in the efficacy analysis, 10 (50%) had a CR, and 3 (15%) had a partial response, for an ORR of 65%. Three additional patients had stable disease, and four had disease progression as best responses.
Among the patients with CRs, the duration of response ranged from nearly 275 days to more than 600 days.
“This does appear to be durable, and it is time dependent in terms of response. We did see early response, and we also saw deepening of response over time,” Dr. Nastoupil said.
Four patients were discontinued from the study because of immune-related adverse events. All four patients had achieved a CR at the time of study removal, and all four have ongoing CRs.
Among the 30 patients evaluable for safety, there were no grade 4 adverse events, no deaths, and few grade 3 events. Most events were grade 1 or 2, and included fatigue, eye pain/blurred vision/watery eye, nausea and vomiting, diarrhea dyspnea, rash, cough, and lymphopenia.
The investigators also looked at potential biomarkers for response, including PD-L1 expression in tumors prior to treatment. They found in samples from three patients who went on to achieve CRs that PD-L1 expression in tumor cells was low, ranging from 0% to 8%, suggesting that PD-L1 expression may not be necessary to generate a response with the combination.
They then looked at the association between CD8-positive T effector cells and responses in 12 patients, and found that patients with higher levels of expression had better ORR and CR rates.
“These interim results warrant further investigation of this combination in follicular lymphoma, and an expansion to include patients with refractory follicular lymphoma is planned,” Dr. Nastoupil concluded.
The Leukemia & Lymphoma Society supported the study. Dr Nastoupil has disclosed consulting fees from Celgene and contracted research for Abbvie, Janssen, and TG Therapeutics.
AT 14-ICML
Key clinical point: The combination of pembrolizumab and rituximab increased responses compared with repeat rituximab in patients with relapsed follicular lymphoma.
Major finding: The overall response rate with the combination was 65%, including 50% complete responses.
Data source: Open-label, phase II, single-arm study in 32 patients with relapsed follicular lymphoma (20 for efficacy, 30 for safety analysis).
Disclosures: The Leukemia & Lymphoma Society supported the study. Dr Nastoupil has disclosed consulting fees from Celgene and contracted research for Abbvie, Janssen, and TG Therapeutics.
Twofer drug blocks SYK/JAK pathways in advanced NHL
MADRID – Cerdulatinib, a single oral agent targeting two different pathways that lymphomas rely on for survival, produced rapid tumor responses in patients with relapsed or refractory non-Hodgkin lymphomas (NHL) in a phase II study.
The overall response rate among 47 patients enrolled in a phase II study was 50%, including responses among 67% of patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) and 56% of patients with follicular lymphoma (FL), reported Paul A. Hamlin, MD, of the Memorial Sloan Kettering Cancer Center in New York.
“At a dose of 30 mg b.i.d., cerdulatinib inhibited pathways of interest, so both SYK and JAK are inhibited at maximum amounts at physiologically attained doses,” he said at a briefing at the annual congress of the European Hematology Association.
Certain B cell malignancies are “addicted” to B cell antigen-receptor (BCR) signaling. A combination of selective SYK and JAK inhibitors can syngergistically suppress this response in B cell malignancies, he said.
In a phase I dose escalation study of cerdulatinib in 43 patients with relapsed/refractory CLL and NHL reported by Dr. Hamlin and his colleagues at the 2016 EHA annual congress, inhibition with cerdulatinib of both the BCR/SYK and JAK/STAT pathways in peripheral blood assays was well tolerated.
In the current phase II, multicenter, open-label study, the investigators plan on enrolling up to 40 patients in each of three cohorts: relapsed refractory CLL/SLL, relapsed/refractory indolent NHL, and relapsed diffuse large B cell lymphoma (DLBCL), mantle cell lymphoma (MCL) and transformed FL. The investigators have also begun to enroll patients with peripheral T-cell lymphoma (PTCL) based on efficacy of the dual pathway inhibitor against this malignancy.
The patients received 30-mg cerdulatinib orally twice daily until disease progression or intolerable toxicity.
As noted, the overall response rate was 50% (47 patients), including partial responses (PR) in 12 of 18 (67%) of patients with CLL/SLL, in five of nine patients (56%) with FL, and in one of seven patients with relapsed refractory marginal zone lymphoma and Waldenstrom macroglobulinemia.
In addition, the investigators identified one complete response in the first enrolled patient with PTCL.
“I think this is a proof of principle that the biology suggesting that SYK is expressed in T-cell lymphomas and may have an important role in its pathogenesis holds true,” Dr. Hamlin said.
Responses have been detected in heavily pretreated patients, including one patient with FL who had a relapse on ibrutinib and a patient with SLL who had a relapse during treatment with venetoclax. Both patients remain on cerdulatinib after 10 months. At the time of the data presentation, 15 patients are continuing therapy with the dual inhibitor, including 4 who have been taking it for more than 300 days.
The responses occurred after a median of two cycles, Dr. Hamlin noted, and improved over time, as seen in seven of nine patients with increased reduction of nodal masses at the second or third rescan.
The most frequent adverse events with cerdulatinib at the target dose of 30 mg are fatigue, diarrhea, nausea, and cytopenias.
In the dose-escalation phase, three patients at a dose of 35 mg b.i.d. had higher than expected drug concentrations and experienced severe adverse events, including two fatal infections and one grade 3 pancreatitis. The investigators launched a pharmacokinetics monitoring strategy in hopes of avoiding this complication in the future.
Dr. Hamlin said the efficacy to date suggests the cerdulatinib could be used as a single agent but added that its generally favorable safety profile may make it a good partner in combination therapies.
The study is supported by Molecular Templates. Dr. Hamlin disclosed grant/research support and/or consultant role for Spectrum, GlaxoSmithKline, Pfizer, Seattle Genetics, Genentech, and Gilead.
MADRID – Cerdulatinib, a single oral agent targeting two different pathways that lymphomas rely on for survival, produced rapid tumor responses in patients with relapsed or refractory non-Hodgkin lymphomas (NHL) in a phase II study.
The overall response rate among 47 patients enrolled in a phase II study was 50%, including responses among 67% of patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) and 56% of patients with follicular lymphoma (FL), reported Paul A. Hamlin, MD, of the Memorial Sloan Kettering Cancer Center in New York.
“At a dose of 30 mg b.i.d., cerdulatinib inhibited pathways of interest, so both SYK and JAK are inhibited at maximum amounts at physiologically attained doses,” he said at a briefing at the annual congress of the European Hematology Association.
Certain B cell malignancies are “addicted” to B cell antigen-receptor (BCR) signaling. A combination of selective SYK and JAK inhibitors can syngergistically suppress this response in B cell malignancies, he said.
In a phase I dose escalation study of cerdulatinib in 43 patients with relapsed/refractory CLL and NHL reported by Dr. Hamlin and his colleagues at the 2016 EHA annual congress, inhibition with cerdulatinib of both the BCR/SYK and JAK/STAT pathways in peripheral blood assays was well tolerated.
In the current phase II, multicenter, open-label study, the investigators plan on enrolling up to 40 patients in each of three cohorts: relapsed refractory CLL/SLL, relapsed/refractory indolent NHL, and relapsed diffuse large B cell lymphoma (DLBCL), mantle cell lymphoma (MCL) and transformed FL. The investigators have also begun to enroll patients with peripheral T-cell lymphoma (PTCL) based on efficacy of the dual pathway inhibitor against this malignancy.
The patients received 30-mg cerdulatinib orally twice daily until disease progression or intolerable toxicity.
As noted, the overall response rate was 50% (47 patients), including partial responses (PR) in 12 of 18 (67%) of patients with CLL/SLL, in five of nine patients (56%) with FL, and in one of seven patients with relapsed refractory marginal zone lymphoma and Waldenstrom macroglobulinemia.
In addition, the investigators identified one complete response in the first enrolled patient with PTCL.
“I think this is a proof of principle that the biology suggesting that SYK is expressed in T-cell lymphomas and may have an important role in its pathogenesis holds true,” Dr. Hamlin said.
Responses have been detected in heavily pretreated patients, including one patient with FL who had a relapse on ibrutinib and a patient with SLL who had a relapse during treatment with venetoclax. Both patients remain on cerdulatinib after 10 months. At the time of the data presentation, 15 patients are continuing therapy with the dual inhibitor, including 4 who have been taking it for more than 300 days.
The responses occurred after a median of two cycles, Dr. Hamlin noted, and improved over time, as seen in seven of nine patients with increased reduction of nodal masses at the second or third rescan.
The most frequent adverse events with cerdulatinib at the target dose of 30 mg are fatigue, diarrhea, nausea, and cytopenias.
In the dose-escalation phase, three patients at a dose of 35 mg b.i.d. had higher than expected drug concentrations and experienced severe adverse events, including two fatal infections and one grade 3 pancreatitis. The investigators launched a pharmacokinetics monitoring strategy in hopes of avoiding this complication in the future.
Dr. Hamlin said the efficacy to date suggests the cerdulatinib could be used as a single agent but added that its generally favorable safety profile may make it a good partner in combination therapies.
The study is supported by Molecular Templates. Dr. Hamlin disclosed grant/research support and/or consultant role for Spectrum, GlaxoSmithKline, Pfizer, Seattle Genetics, Genentech, and Gilead.
MADRID – Cerdulatinib, a single oral agent targeting two different pathways that lymphomas rely on for survival, produced rapid tumor responses in patients with relapsed or refractory non-Hodgkin lymphomas (NHL) in a phase II study.
The overall response rate among 47 patients enrolled in a phase II study was 50%, including responses among 67% of patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) and 56% of patients with follicular lymphoma (FL), reported Paul A. Hamlin, MD, of the Memorial Sloan Kettering Cancer Center in New York.
“At a dose of 30 mg b.i.d., cerdulatinib inhibited pathways of interest, so both SYK and JAK are inhibited at maximum amounts at physiologically attained doses,” he said at a briefing at the annual congress of the European Hematology Association.
Certain B cell malignancies are “addicted” to B cell antigen-receptor (BCR) signaling. A combination of selective SYK and JAK inhibitors can syngergistically suppress this response in B cell malignancies, he said.
In a phase I dose escalation study of cerdulatinib in 43 patients with relapsed/refractory CLL and NHL reported by Dr. Hamlin and his colleagues at the 2016 EHA annual congress, inhibition with cerdulatinib of both the BCR/SYK and JAK/STAT pathways in peripheral blood assays was well tolerated.
In the current phase II, multicenter, open-label study, the investigators plan on enrolling up to 40 patients in each of three cohorts: relapsed refractory CLL/SLL, relapsed/refractory indolent NHL, and relapsed diffuse large B cell lymphoma (DLBCL), mantle cell lymphoma (MCL) and transformed FL. The investigators have also begun to enroll patients with peripheral T-cell lymphoma (PTCL) based on efficacy of the dual pathway inhibitor against this malignancy.
The patients received 30-mg cerdulatinib orally twice daily until disease progression or intolerable toxicity.
As noted, the overall response rate was 50% (47 patients), including partial responses (PR) in 12 of 18 (67%) of patients with CLL/SLL, in five of nine patients (56%) with FL, and in one of seven patients with relapsed refractory marginal zone lymphoma and Waldenstrom macroglobulinemia.
In addition, the investigators identified one complete response in the first enrolled patient with PTCL.
“I think this is a proof of principle that the biology suggesting that SYK is expressed in T-cell lymphomas and may have an important role in its pathogenesis holds true,” Dr. Hamlin said.
Responses have been detected in heavily pretreated patients, including one patient with FL who had a relapse on ibrutinib and a patient with SLL who had a relapse during treatment with venetoclax. Both patients remain on cerdulatinib after 10 months. At the time of the data presentation, 15 patients are continuing therapy with the dual inhibitor, including 4 who have been taking it for more than 300 days.
The responses occurred after a median of two cycles, Dr. Hamlin noted, and improved over time, as seen in seven of nine patients with increased reduction of nodal masses at the second or third rescan.
The most frequent adverse events with cerdulatinib at the target dose of 30 mg are fatigue, diarrhea, nausea, and cytopenias.
In the dose-escalation phase, three patients at a dose of 35 mg b.i.d. had higher than expected drug concentrations and experienced severe adverse events, including two fatal infections and one grade 3 pancreatitis. The investigators launched a pharmacokinetics monitoring strategy in hopes of avoiding this complication in the future.
Dr. Hamlin said the efficacy to date suggests the cerdulatinib could be used as a single agent but added that its generally favorable safety profile may make it a good partner in combination therapies.
The study is supported by Molecular Templates. Dr. Hamlin disclosed grant/research support and/or consultant role for Spectrum, GlaxoSmithKline, Pfizer, Seattle Genetics, Genentech, and Gilead.
AT EHA 2017
Key clinical point: Cerdulatinib, an inhibitor of the SYK and JAK pathways, has shown efficacy against relapsed/refractory non-Hodgkin lymphomas.
Major finding: The overall response rate was 50%, including one complete response in a patient with peripheral T-cell lymphoma.
Data source: An open label, phase II study in 47 patients with non-Hodgkin lymphoma or peripheral T-cell lymphoma.
Disclosures: The study is supported by Molecular Templates. Dr. Hamlin disclosed grant/research support and/or consultant roles for Spectrum, GlaxoSmithKline, Pfizer, Seattle Genetics, Genentech, and Gilead.