Phase 1b Results of a Phase 1b/2 Study of Obinutuzmab, Ibrutinib, and Venetoclax in Relapsed/Refractory Chronic Lymphocytic Leukemia (CLL)

Abstract BACKGROUND Venetoclax(VEN), a once daily oral inhibitor of BCL2, has demonstrated high response rates and acceptable toxicity in patients with relapsed or refractory (R/R) CLL both as a single agent and in combination with the anti-CD20 monoclonal antibodies rituximab and obinutuzumab (formerly GA-101, G), where minimal residual disease (MRD) negative responses have been observed in the majority of patients. Ibrutinib (IBR), a once daily oral inhibitor of the Brutontyrosine kinase, likewise induces remissions in the majority of treated patients, but complete response (CR) is uncommon even after prolonged administration. Early genetic studies have demonstrated that BCL2 over-expression rescues BTK deficient XID murine B-cells from spontaneous apoptosis (J Immunol 1996), so we hypothesized that combination therapy would more efficiently achieve deep response endpoints. We report phase 1b results of a single-institution phase 1b/2 study of G, IBR, and VEN to characterize the safety and preliminary efficacy of the combination. METHODS Patients with CLL relapsed after or refractory to ≥1 prior therapy and who required treatment were eligible. Enrolled patients had ECOG ≤1 and preserved end-organ function, including creatinine clearance ≥50 mL/min/m2. Patients with chronic viral hepatitis infection, uncontrolled autoimmunecytopenia, active Richter transformation, and known cysteine-481 BTK mutation or clinical disease progression during treatment with a cysteine-481-binding BTK inhibitor were excluded. G, IBR, and VEN were started sequentially over the first 3 of fourteen 28-day cycles as detailed in the table. To establish the safety of VEN in combination with OBIN and IBR, VEN dose was escalated in 3 x 3 cohorts (100, 200, 400 mg) to a maximum planned dose of 400 mg daily. Dose limiting toxicity (DLT) was defined during the third cycle. Risk assessment for VEN dose ramp-up was conducted according to US prescribing information. Adverse events were assessed and graded using CTCAE v4.03. Response assessment according to IWCLL 2008 criteria, including bone marrow biopsy with 4-colorimmunophenotyping of marrow and peripheral blood (PB) for MRD, occurs after cycles 8 and 14. RESULTS Twelve R/R patients have been treated in the phase 1b portion of the trial. Median age was 57 years (range: 42-70) and median prior therapies was 1 (range: 1-7). Baseline genetic risk features includedunmutatedIGHV in 11 (92%),del(17p) in 1 (8%), del(11q) in 8 (67%), and complex abnormal karyotype in 5 (42%) patients. Tumor lysis (TLS) risk was low in 1 (8%), medium in 7 (58%), and high in 4 (33%) patients at study entry. In general, observed toxicities for the combination were consistent with those reported for the single agents. DLTs were not observed at any VEN dose level, establishing VEN 400 mg daily as safe in combination with standard doses of G and IBR. The most common grade ≥3 adverse events (regardless of attribution) were neutropenia (50%), lymphopenia (33%),hypertension(25%), and fatigue (17%). Grade 1/2 adverse events occurring in over half the patients included bruising (all grade 1, 83%), infusion related reaction (75%), hypertension (67%), headache (67%), hyperuricemia (all grade 1, 75%), hypocalcemia (75%), and diarrhea (all grade 1, 67%), AST and/or ALT elevation (58%), and rash (50%). No cases of either clinical or laboratory TLS were observed. All patients remain on therapy and 6 have reached response assessment after completing 8 cycles of therapy. All 6 have achieved objective response: 5 PR, including 1 MRD-negative in PB (VEN 100) and 1 MRD-negative in both PB and marrow (VEN 100), and 1 CR with MRD-negative PB and marrow (VEN 200). CONCLUSIONS G, IBR, and VEN can be safely administered in combination at doses standard for the treatment of CLL. DLTs were not observed, establishing VEN 400 mg as the recommended phase 2 dose in combination with G and IBR. Adverse events were manageable and largely consistent with those reported in the single agent phase 2 studies. Objective responses, including MRD-negative responses, have been observed among all R/R patients from the first dose cohorts. Accrual continues to parallel phase 2 cohorts of R/R (n=25) and TN (n=25) patients. Updated phase 1b toxicity and response data will be presented. Table. Table. Disclosures Jones: Abbvie: Membership on an entity's Board of Directors or advisory committees, Research Funding; Genentech: Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen: Membership on an entity's Board of Directors or advisory committees, Research Funding; Pharmacyclics: Membership on an entity's Board of Directors or advisory committees, Research Funding. Awan:Pharmacyclics: Consultancy; Novartis Oncology: Consultancy; Innate Pharma: Research Funding.

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Phase II Study of Infusional Carfilzomib in Patients with Relapsed or Refractory Multiple Myeloma

Blood ◽

10.1182/blood.v120.21.947.947 ◽

2012 ◽

Vol 120 (21) ◽

pp. 947-947 ◽

Cited By ~ 4

Author(s):

Nikoletta Lendvai ◽

Heather Landau ◽

Alexander Lesokhin ◽

Ioanna Tsakos ◽

Guenther Koehne ◽

...

Keyword(s):

Multiple Myeloma ◽

Adverse Events ◽

Board Of Directors ◽

Research Funding ◽

Single Agent ◽

Cell Transplant ◽

Phase 2 ◽

Advisory Committees ◽

Refractory Multiple Myeloma ◽

Higher Doses

Abstract Abstract 947 Background: Carfilzomib (CFZ) is a selective, irreversible epoxyketone inhibitor of the chymotrypsin-like activity of both the constitutive proteasome and the immunoproteasome. In patients with multiple myeloma single-agent CFZ is active and well tolerated at doses up to 27 mg/m2 when administered intravenously over 2–10 minutes. Based on preclinical safety data showing that a slower infusion was better tolerated and permitted administration of higher doses than a 2–10 minute infusion, the phase1b/2 PX-171-007 (NCT00531284) study evaluated the administration of CFZ as a 30-minute infusion. That study found the maximally tolerated dose of CFZ given as a 30 minutes infusion to be 56mg/m2. We designed a single institution, phase 2 study of high dose, infusional CFZ in patients with relapsed and/or refractory multiple myeloma. Methods: CFZ was given as a 30-minute IV infusion on days 1, 2, 8, 9, 15, and 16 of a 28-day cycle. Cycle1 Day1–2 doses were 20 mg/m2, followed by escalation to 56mg/m2. Dexamethasone 8 mg was given prior to infusion as premedication to mitigate infusion-related reactions. Patients who did not achieve a partial response (PR) after two cycles of CFZ or initially responded to single agent CFZ, but later showed evidence of progression of disease (POD) had dexamethasone (40mg/week) added to their regimen. Overall response rate (ORR; [sCR + CR + VGPR + PR]) was determined according to International Myeloma Working Group Uniform Response Criteria. Subjects were evaluated for adverse events according to the Common Terminology Criteria for Adverse Events v 4.0. Results: Thirty-four patients have been enrolled. Patients had received a median of 5 (range 1–11) prior treatment regimens and included 7 patients who relapsed following allogeneic stem cell transplant. Seventy eight percent of patients were bortezomib-refractory. ORR among patients who completed 4 cycles of therapy or experienced POD prior to completing 4 cycles of therapy was 58% with 1 CR, 7 VGPRs, and 6 PRs. ORR after 4 cycles of therapy was 57% in bortezomib-refractory patients. By intention to treat analysis the ORR in all comers was 50%. Median progression free survival was 4.6 months, median overall survival has not been reached with a median follow-up among survivors of 9.6 months (range: 0.3–14.3 months). The average time to best response was two cycles. Three out of the 11 patients that had dexamethasone 40mg/week added to their regimen obtained an improved response. Twelve patients (35%) were dose reduced. Treatment emergent, non-hematologic Grade 3/4 adverse events for which contribution of CFZ cannot be excluded were: HTN (n = 7), lung infection (n = 6), pulmonary edema (n = 3), reduced ejection fraction (n=1), sepsis (n=2), febrile neutropenia (n=1), bacteremia (n = 1), protothecosis (n = 1), fatigue (n=1), neuropathy (n=1), microangiopathic hemolytic anemia(n=1), nausea/vomiting/+/− diarrhea (n = 2), gastrointestinal bleed in the setting of Grade 4 thrombocytopenia (n = 1), hyperkalemia (n = 1). Conclusions: The 20/56 mg/m2 dose for CFZ administered as a 30-minute IV infusion was associated with 58% ORR, in a heavily pretreated patient population, including 21% of patients w/ prior allogeneic transplant, where the majority of patients were bortezomib-refractory. The ORR from this study is consistent with the one previously reported at the similar dose. Higher doses of carfilzomib continue to be explored in ongoing Phase 2 and Phase 3 studies. Disclosures: Landau: Onyx: Research Funding; Milleneum: Membership on an entity's Board of Directors or advisory committees, Research Funding. Hassoun:Millenium: Membership on an entity's Board of Directors or advisory committees, Research Funding; Celgene: Research Funding. Giralt:Onyx: Membership on an entity's Board of Directors or advisory committees, Research Funding; Celgene: Membership on an entity's Board of Directors or advisory committees, Research Funding; Milleneum: Membership on an entity's Board of Directors or advisory committees.

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A Phase 1b, Dose-Finding Study Of Ruxolitinib Plus Panobinostat In Patients With Primary Myelofibrosis (PMF), Post–Polycythemia Vera MF (PPV-MF), Or Post–Essential Thrombocythemia MF (PET-MF): Identification Of The Recommended Phase 2 Dose

Blood ◽

10.1182/blood.v122.21.4045.4045 ◽

2013 ◽

Vol 122 (21) ◽

pp. 4045-4045 ◽

Cited By ~ 10

Author(s):

Vincen t Ribrag ◽

Claire N Harrison ◽

Florian H Heidel ◽

Jean-Jacques Kiladjian ◽

Suddhasatta Acharyya ◽

...

Keyword(s):

Adverse Events ◽

Disease Progression ◽

Board Of Directors ◽

Dose Escalation ◽

Research Funding ◽

Phase 2 ◽

Advisory Committees ◽

Expansion Phase ◽

Phase 1B ◽

Grade 3

Abstract Background Myelofibrosis (MF) is a myeloproliferative neoplasm associated with progressive, debilitating symptoms that impact patient quality of life (QoL) and reduce survival. Ruxolitinib (RUX), a potent dual JAK1/JAK2 inhibitor, demonstrated superiority in spleen volume and symptom reduction, improved health-related QoL measures, and prolonged survival compared with traditional therapies or placebo in the phase 3 COMFORT studies. Panobinostat (PAN) is a potent oral pan-deacetylase inhibitor (DACi) that inhibits JAK pathway signaling through increased acetylation of the JAK2 protein chaperone HSP90. In phase 1/2 studies in MF, PAN has shown reduction in splenomegaly and JAK2 V617F allele burden, and improvement of marrow fibrosis. RUX and PAN demonstrated synergistic anti-MF activity in JAK2-mutation–driven MF murine models. Here, we present the results of a phase 1b study to determine the recommended phase 2 dose (RP2D) of the combination of RUX and PAN in MF patients. Methods Patients with intermediate-1, -2, or high-risk MF by International Prognostic Scoring System criteria and with palpable splenomegaly ≥ 5 cm below the costal margin were enrolled. Dose escalation was guided by a Bayesian logistic regression model with overdose control based on dose-limiting toxicities (DLTs) in the first cycle along with other safety findings. DLTs were defined as protocol-specified toxicities related to treatment but unrelated to disease progression, intercurrent illness, or concomitant medications, occurring up to and including cycle 1 day 28, that are considered severe enough to prevent continuation of treatment. Each dosing cohort consisted of ≥ 3 evaluable patients. Data for ≥ 9 patients were required to determine the preliminary RP2D and/or maximum tolerated dose (MTD). Following determination of the preliminary RP2D, additional patients were to be enrolled and treated at that dose in the safety-expansion phase. The range of dose levels tested for RUX was 5-15 mg twice daily (BID) and for PAN was 10-25 mg once daily, 3 times a week (TIW; days 2, 4, and 6), every other week (QOW) in a 28-day cycle. Serial blood samples collected following the first dose of RUX alone on day 1 and in combination with PAN on days 2 and 6 were evaluated for plasma concentrations of RUX (days 1, 2, and 6) and PAN (days 2 and 6) by LC-MS/MS. Pharmacokinetic parameters were derived using noncompartmental analysis. Spleen size was determined by palpation. Results A total of 38 patients have been enrolled across 6 cohorts in the dose-escalation phase. Preliminary data presented here are based on a cutoff date of March 7, 2013. Thirteen patients (34.2%) have discontinued study treatment. Reasons for discontinuation include disease progression (n = 4), adverse events (n = 7), withdrawal of consent (n = 1), and death due to pulmonary embolism (n = 1). The most common grade 3/4 adverse events were anemia (34.2%), thrombocytopenia (21.2%), abdominal pain (7.9%), and diarrhea (7.9%). QTc prolongation of > 500 ms was observed in 1 patient in cohort 4. DLTs are summarized in the Table. An approximate 50% increase in plasma exposure of both RUX and PAN on day 6 from respective baselines suggested drug-drug interaction (DDI) at 15 mg RUX and 25 mg PAN. The RP2D was defined at the cohort 6 dose and schedule. Evidence of preliminary activity was observed across all cohorts with 28 patients (73.7%) showing ≥ 50% decrease in palpable spleen length at some point during the study. Conclusions The combination of RUX and PAN has a tolerable safety profile, with few DLTs and acceptable rates of grade 3/4 anemia and thrombocytopenia. Also, encouraging splenomegaly reduction was seen in the dose-escalation phase. The MTD was not reached; however, due primarily to findings of anemia and potential DDI in dose cohort 6, preliminary RP2D was identified at RUX 15 mg BID/PAN 25 mg TIW/QOW and will be confirmed in the dose-expansion phase. Additional safety and efficacy data from patients in the expansion phase will be presented. Disclosures: Ribrag: Takeda: Membership on an entity’s Board of Directors or advisory committees; Bayer: Research Funding; Sanofi: Consultancy, Honoraria, Membership on an entity’s Board of Directors or advisory committees, Research Funding; Johnson & Johnson : Honoraria, Membership on an entity’s Board of Directors or advisory committees; Servier: Membership on an entity’s Board of Directors or advisory committees, Research Funding. Off Label Use: Ruxolitinib is approved for MF but panobinostat is not approved anywhere globally at this time for any indication. Harrison:S Bio: Honoraria, Membership on an entity’s Board of Directors or advisory committees; Shire: Speakers Bureau; Celgene: Honoraria; YM Bioscience: Honoraria, Membership on an entity’s Board of Directors or advisory committees; Sanofi: Honoraria, Membership on an entity’s Board of Directors or advisory committees, Speakers Bureau; Novartis: Honoraria, Membership on an entity’s Board of Directors or advisory committees, Research Funding, Speakers Bureau; Gilead: Honoraria, Membership on an entity’s Board of Directors or advisory committees. Heidel:Novartis: Membership on an entity’s Board of Directors or advisory committees, Research Funding. Kiladjian:AOP Orphan: Honoraria, Membership on an entity’s Board of Directors or advisory committees, Research Funding; Sanofi: Honoraria, Membership on an entity’s Board of Directors or advisory committees; Celgene: Research Funding; Novartis: Honoraria, Membership on an entity’s Board of Directors or advisory committees, Research Funding. Acharyya:Novartis: Employment. Mu:Novartis: Employment. Liu:Novartis: Employment. Williams:Novartis: Employment. Giles:Novartis: Consultancy, Research Funding. Conneally:Pfizer: Honoraria, Membership on an entity’s Board of Directors or advisory committees, Research Funding; BMS: Honoraria, Membership on an entity’s Board of Directors or advisory committees, Research Funding; Novartis: Honoraria, Membership on an entity’s Board of Directors or advisory committees, Research Funding. Kindler:Novartis: Membership on an entity’s Board of Directors or advisory committees. Passamonti:sanofi-aventis: Honoraria; Incyte: Honoraria; Celgene: Honoraria; Novartis: Honoraria. Vannucchi:Novartis: Honoraria, Membership on an entity’s Board of Directors or advisory committees.

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A Phase 1b Study Investigating the Combination of the Tetravalent Bispecific NK Cell Engager AFM13 and Pembrolizumab in Patients with Relapsed/Refractory Hodgkin Lymphoma after Brentuximab Vedotin Failure: Updated Safety and Efficacy Data

Blood ◽

10.1182/blood-2018-99-118506 ◽

2018 ◽

Vol 132 (Supplement 1) ◽

pp. 1620-1620 ◽

Cited By ~ 7

Author(s):

Nancy L. Bartlett ◽

Robert W. Chen ◽

Eva Domingo-Domenech ◽

Andres Forero-Torres ◽

Ramon Garcia-Sanz ◽

...

Keyword(s):

Adverse Events ◽

Nk Cells ◽

Board Of Directors ◽

Salvage Therapy ◽

Research Funding ◽

Nk Cell ◽

Single Agent ◽

Brentuximab Vedotin ◽

Advisory Committees ◽

Phase 1B

Abstract Background AFM13 is a bispecific, tetravalent NK cell-engaging antibody construct binding to CD30 on CD30+ tumor cells and CD16A on NK cells. By engaging CD16A-positive NK cells, AFM13 leads to NK cell-mediated killing of CD30-positive lymphoma cells (Reusch et al., 2014) making it an attractive agent to target classical Hodgkin lymphoma (HL). Pembrolizumab is a PD-1 blocking antibody which has shown high single-agent response rates in patients (pts) with relapsed/refractory HL (RRHL; Armand et al., 2016, Chen et al., 2017). AFM13 has shown clinical activity in RRHL as a single agent in a preceding Phase 1 study (Rothe et al., 2015). Preclinical in vivo data of the combination of AFM13 with PD-1 blockade showed synergistic activity and the potential for induction of cross-talk between innate and adaptive immunity (Zhao et al., 2016). We hypothesize that the combination of the two agents could improve outcomes in pts with RRHL. Methods This Phase 1b study is evaluating the safety and tolerability of the combination of AFM13 with pembrolizumab (Keytruda) as salvage therapy after failure of standard therapies including brentuximab vedotin (BV) in HL (NCT02665650). Pts receive escalating doses of AFM13 in combination with pembrolizumab at a dose of 200 mg flat administered every 3 weeks following a classical 3+3 design, followed by enrollment into an extension cohort at the maximum tolerated dose (MTD)/maximum administered dose (MAD). Response assessment is performed every 12 weeks by PET/CT according to the Lugano Classification (Cheson et al., 2014). The main objectives of the study is to ascertain the MTD/MAD along with the preliminary efficacy of the combination. Results As of June 29, 2018, 30 pts have been enrolled into the study. The median age is 34 years (range, 18-73), with a median of 4 (range 3-7) prior lines of therapy. All pts had relapsed or refractory disease (43% relapsed, 57% refractory) and had failed standard treatments including BV and 43% of pts (13/30) had BV as their latest therapy. Thirty seven percent (11/30) had undergone prior autologous stem cell transplantation. All 30 pts have completed the 6-week dose-limiting toxicity (DLT) observation period. Twelve pts were enrolled into the dose escalation cohorts (Cohorts 1 (n=3), 2 (n=3), and 3 (n=6)) and 18 into the Extension Cohort, with a total of 24 patients treated at the MAD (dose level 3). One DLT was observed in Cohort 3 (missing ≥25% of AFM13 during the DLT period) and another observed in the Extension Cohort (G4 infusion-related reaction; IRR). The most common related adverse events (AEs) were IRRs (80%), rash (30%), pyrexia (23%), nausea (23%), diarrhea (20%), fatigue (17%), headache (17%), increased aspartate aminotransferase (13%), and increased alanine aminotransferase (10%). Treatment related G3/4 AEs included IRRs (13%), elevated AST (3%), gastritis (3%), hypotension (3%), nausea (3%), neutropenia (3%), and vomiting (3%). The majority of IRRs were manageable with standard of care measures and did not lead to treatment discontinuations. Included in the efficacy analysis were the best response from 29 evaluable pts who had at least one post-baseline disease assessment as of the data cutoff on June 29, 2018. The overall response rate (ORR) and complete response (CR) rate for evaluable pts treated at the dose and schedule chosen for expansion (n=23; Cohort 3 and Extension Cohort) were 87% and 35% by the investigator-confirmed assessment, respectively. Independent assessment resulted in an ORR of 87% and CR rate of 39% for these pts. Updated data for all 30 patients will be presented at the meeting. Conclusions The combination of AFM13 and pembrolizumab is a well-tolerated salvage therapy in pts with RRHL. IRRs were the most frequently observed adverse events; however, most of these events were of mild or moderate severity and manageable. Both the ORR and CR rate compare favorably to monotherapy pembrolizumab in a similar RRHL population (Chen et al., 2017). The combination of AFM13 and pembrolizumab could be a potential new therapeutic option for HL patients. Disclosures Bartlett: Immune Design: Research Funding; Affimed: Research Funding; Bristol-Meyers Squibb: Research Funding; Merck & Co: Research Funding; Pharmacyclics: Research Funding; Celgene: Research Funding; Pharmacyclics: Research Funding; Genentech: Research Funding; Forty Seven: Research Funding; Novartis: Research Funding; Novartis: Research Funding; Millennium: Research Funding; ImaginAB: Research Funding; Pfizer: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Gilead: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen: Research Funding; KITE: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Seattle Genetics: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Astra Zeneca: Research Funding; Acerta: Membership on an entity's Board of Directors or advisory committees. Chen:Affimed: Research Funding; Bristol-Myers Squibb: Consultancy, Research Funding; Genentech Inc.: Consultancy; Seattle Genetics: Consultancy, Honoraria, Research Funding, Speakers Bureau; Merck & Co., Inc.: Consultancy, Research Funding, Speakers Bureau; Millennium Pharmaceuticals: Consultancy, Research Funding; Pharmacyclics: Consultancy, Research Funding. Domingo-Domenech:Affimed: Research Funding. Forero-Torres:Affimed: Research Funding. Garcia-Sanz:Affimed: Research Funding. Devata:Affimed: Research Funding. Rodriguez Izquierdo:Affimed: Research Funding. Lossos:Affimed: Research Funding. Reeder:Affimed: Research Funding. Sher:Affimed: Research Funding. Choe-Juliak:Affimed: Employment. Prier:Affimed: Research Funding. Schwarz:Affimed: Employment. Strassz:Affimed: Employment. Alland:Affimed: Employment. Ansell:Bristol-Myers Squibb: Research Funding; Celldex: Research Funding; LAM Therapeutics: Research Funding; Trillium: Research Funding; Pfizer: Research Funding; Regeneron: Research Funding; Seattle Genetics: Research Funding; Merck & Co: Research Funding; Affimed: Research Funding; Takeda: Research Funding.

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Phase 2 Study of Carfilzomib (CFZ) with or without Filanesib (FIL) in Patients with Advanced Multiple Myeloma (MM)

Blood ◽

10.1182/blood.v126.23.728.728 ◽

2015 ◽

Vol 126 (23) ◽

pp. 728-728 ◽

Cited By ~ 7

Author(s):

Jeffrey A Zonder ◽

Saad Usmani ◽

Emma C. Scott ◽

Craig C. Hofmeister ◽

Nikoletta Lendvai ◽

...

Keyword(s):

Partial Response ◽

Board Of Directors ◽

Research Funding ◽

Single Agent ◽

Objective Response ◽

Phase 2 ◽

Advisory Committees ◽

Phase 2 Study ◽

Heavily Pretreated ◽

Grade 3

Abstract Background: FIL (ARRY-520), a specific kinesin spindle protein (KSP) inhibitor, represents a novel class of agent under investigation for the treatment of patients (pts) with MM. Prognosis of pts refractory to immunomodulatory agents (IMiDs) and proteasome inhibitors (PIs) is poor. These pts have a median survival of 9 months underscoring the importance of novel therapeutic strategies incorporating new mechanisms of action. FIL has shown interesting preliminary activity as a single agent as well as in Phase 1 studies in combination with bortezomib (BTZ) and with CFZ, all with a manageable safety profile. Methods: This trial is an ongoing, randomized, multicenter, open-label Phase 2 study for pts with relapsed and refractory MM who received at least 2 prior regimens, including BTZ and an IMiD, and with disease refractory to the last regimen as per IMWG criteria. No prior treatment with CFZ is allowed. Approximately 75 pts will be randomized 2:1 to receive CFZ (20/27 mg/m2 intravenous [IV] on Days 1, 2, 8, 9, 15 and 16) plus FIL (1.25 mg/m2 IV on Days 1, 2, 15 and 16) or single-agent CFZ, at the same dose as in the combination, in a 28-day cycle. Prophylactic filgrastim is administered in the CFZ + FIL arm. The primary endpoint is progression-free survival (PFS). Patients with progressive disease (PD) on CFZ are allowed cross-over to the CFZ + FIL arm if they continue to meet eligibility criteria. Results: As of 15 June 2015, 72 pts have been randomized (23 CFZ, 49 CFZ + FIL) with a median age of 65 years. Pts who could have potentially received ≥ 2 cycles of treatment (20 CFZ, 30 CFZ + FIL) were evaluable for efficacy. These pts were heavily pretreated with a median of 4 and 5 prior regimens in the CFZ and CFZ + FIL arm, respectively. A total of 25% and 30 % of pts, respectively, received prior pomalidomide. The objective response rate (ORR) was 10% in the CFZ arm and 30% in the CFZ + FIL arm. In the CFZ arm, 2 pts achieved a partial response (PR) and 2 pts (10%) achieved an MR. In the CFZ + FIL arm, 3 pts achieved a very good partial response and 6 pts achieved a PR, with 2 additional pts (7%) achieving an MR. In the population of pts who were refractory to both prior BTZ and prior IMiDs, the ORR was 14% and 35%, respectively. Grade 3-4 hematological laboratory abnormalities (≥ 5% of pts) were leukopenia (9% CFZ vs. 21% CFZ + FIL), neutropenia (14% vs. 24%), thrombocytopenia (14% vs. 24%), and anemia (9% vs. 26%). Neutropenia and thrombocytopenia were reversible. No adverse events (AEs) of febrile neutropenia were reported. The only Grade 3-4 non-hematological AE occurring in ≥ 5% of pts was dyspnea (5% vs.11%). The most common reason for treatment discontinuation was confirmed PD (39% vs. 28%) or Investigator discretion in case of unconfirmed PD or clinical PD (17% vs. 12%). Conclusions: The combination of FIL and CFZ was well-tolerated and noticeably increased the ORR compared to CFZ alone in heavily pretreated pts with advanced MM. The preliminary efficacy in pts who are double refractory to IMiDs and BTZ who were randomized to CFZ + FIL appears higher than in pts treated with CFZ alone (in the CFZ arm of this trial and in previously published reports involving such pts). Updated safety and efficacy data, including PFS, will be presented at the meeting. Table. Efficacy evaluable pts (potential to have received ≥ 2 cycles of treatment) CFZ (N = 20) CFZ + FIL (N = 30) Prior regimens, median (range) 4 (2,11) 5 (2,11) N cycles on study, median (range) 4 (1 - 16) 4 (1 - 15+) % ORR (≥ PR) 10 30 % CBR (≥ MR) 20 37 N (%) IMiD & BTZ Refractory 14 (70) 20 (67) % ORR (≥ PR) 14 35 % CBR (≥ MR) 21 40 CBR = clinical benefit rate Disclosures Zonder: Seattle Genetics: Membership on an entity's Board of Directors or advisory committees; Prothena: Membership on an entity's Board of Directors or advisory committees; BMS: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees, Other: research support. Off Label Use: carfilzomib; treatment of myeloma, but not in combination with filanesib. Usmani:Celgene Corporation: Consultancy, Honoraria; Onyx: Consultancy, Honoraria, Research Funding; Janssen: Research Funding. Berdeja:Onyx: Research Funding; Array: Research Funding; Takeda: Research Funding; Acetylon: Research Funding; Janssen: Research Funding; BMS: Research Funding; MEI: Research Funding; Celgene: Research Funding; Novartis: Research Funding; Abbvie: Research Funding; Curis: Research Funding. Anderson:Onyx: Speakers Bureau; Takeda: Speakers Bureau; Celgene: Speakers Bureau. Hari:BMS: Consultancy, Honoraria, Research Funding; Celgene: Consultancy, Honoraria, Research Funding; Janssen: Honoraria; Onyx: Consultancy, Honoraria, Research Funding; Takeda: Consultancy, Honoraria, Research Funding; Sanofi: Honoraria, Research Funding. Singhal:Celgene: Speakers Bureau. Valent:Takeda/Millennium: Speakers Bureau; Celgene: Speakers Bureau. Faber:Celgene: Consultancy. Schiller:Sunesis: Honoraria, Research Funding. Schreiber:Array BioPharma: Employment. Oliver:Array BioPharma: Employment. Rush:Array BioPharma: Employment. Tunquist:Array BioPharma: Employment. Ptaszynski:Array BioPharma: Employment. Raje:Eli Lilly: Research Funding; Millenium: Consultancy; Takeda: Consultancy; Onyx: Consultancy; Acetylon: Research Funding; BMS: Consultancy; AstraZeneca: Research Funding; Novartis: Consultancy; Amgen: Consultancy; Celgene Corporation: Consultancy; Acetylon: Research Funding.

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Phase 2 Multicenter Study of Tazemetostat, an EZH2 Inhibitor, in Patients with Relapsed or Refractory Follicular Lymphoma

Blood ◽

10.1182/blood-2019-128096 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 123-123 ◽

Cited By ~ 16

Author(s):

Franck Morschhauser ◽

Herve Tilly ◽

Aristeidis Chaidos ◽

Tycel J. Phillips ◽

Vincent Ribrag ◽

...

Keyword(s):

Antitumor Activity ◽

Board Of Directors ◽

Research Funding ◽

Single Agent ◽

Objective Response ◽

Phase 2 ◽

Employment Equity ◽

Advisory Committees ◽

Activating Mutations ◽

Equity Ownership

Introduction: Relapsed/refractory (R/R) follicular lymphoma (FL) remains a difficult-to-treat condition, with limited treatment options. New, tolerable treatments with unique mechanisms of action are needed, especially for high-risk patients whose disease progresses within 24 months of diagnosis (POD24). The epigenetic regulator EZH2 catalyzes the histone 3 lysine 27 trimethylation (H3K27m3) gene suppressive mark, which is essential for BCL6-driven germinal center (GC) formation. Conversely, a reduction in EZH2 catalytic activity is required for centroblast differentiation and initiation of the GC exit program. Activating mutations (MT) in EZH2, present in ~20% of FL patients, and enhanced H3K27me3 prevent GC exit, resulting in GC hyperplasia and lymphomagenesis. Tazemetostat, an investigational, selective, oral EZH2 inhibitor, has demonstrated durable, single-agent, antitumor activity in R/R FL patients with MT or wild-type (WT) EZH2. Herein, we report newly emerging interim efficacy and safety data from the MT and WT cohorts and the POD24 subgroup. Methods: This open-label, multicenter, phase 2 study (NCT01897571) evaluated tazemetostat 800 mg administered orally twice daily in patients with MT or WT EZH2 R/R FL (Grade 1-3b). Key inclusion criteria included age ≥18 years, Eastern Cooperative Oncology Group performance status of 0-2, ≥2 prior treatment regimens, and measurable disease per 2007 IWG-NHL criteria. The primary endpoint was objective response rate (complete response + partial response). Secondary endpoints included progression-free survival and safety. The POD24 subgroup was composed of patients experiencing disease progression or relapse within 24 months of diagnosis or the start of frontline treatment with immunochemotherapy. Results: As of June 7, 2019, interim data were available for 99 patients (MT EZH2, n=45 [POD24, n=17; 38%]; WT EZH2, n=54 [POD24, n=30; 56%]). Of the 33 patients in the MT cohort with an objective response, 15 (45%) had a response at ≥6 months, 7 (21%) at ≥12 months, and 4 (12%) at ≥16 months. Of the 18 patients in the WT cohort with an objective response, 15 (83%) had a response at ≥6 months, 9 (50%) at ≥12 months, and 6 (33%) at ≥16 months. Data from the MT cohort continue to mature, with 11 (24%) patients enrolled in the past year and 17 (38%) patients still on treatment. Updated data from the fully enrolled MT cohort, and sub-group analyses from both WT and MT cohort, will be presented. Interim efficacy data from the response-evaluable population and POD24 subgroup of the MT and WT cohorts are presented in Table 1. These results demonstrate the potent, antitumor activity of tazemetostat regardless of the prognostic category of patients. Treatment-related Grade ≥3 adverse events (AEs) were reported in 17% of all patients and 15% of patients in the POD24 subgroup. The most frequently reported AEs were similar across the total population and the POD24 subgroup and included thrombocytopenia (3%), anemia (2%), asthenia (2%), vomiting (1%), and fatigue (1%). Five percent of all patients discontinued treatment, and 9% had dose reductions due to treatment-related AEs. No treatment-related Grade 5 AE and deaths were reported. Conclusion: Tazemetostat was generally well tolerated, with a low incidence of treatment-related AEs. Tazemetostat demonstrated clinically meaningful, durable, single-agent activity across a spectrum of patients with FL, including the POD24 subgroup, and pronounced responses in patients with EZH2 activating mutations. Disclosures Morschhauser: BMS: Honoraria; Roche/Genentech: Consultancy; Servier: Consultancy; Janssen: Honoraria; Celgene: Honoraria; Gilead: Consultancy. Tilly:servier: Honoraria; merck: Honoraria; roche: Membership on an entity's Board of Directors or advisory committees; Janssen: Honoraria; Gilead: Honoraria; BMS: Honoraria; Karyopharm: Consultancy; Roche: Consultancy; Celgene: Consultancy, Research Funding; Astra-Zeneca: Consultancy. Phillips:Bayer: Consultancy; Incyte: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees; Genentech: Consultancy; Seattle Genetics: Consultancy; Gilead: Consultancy; Abbvie: Research Funding; Pharmacyclics: Consultancy, Research Funding. Ribrag:Servier: Consultancy, Membership on an entity's Board of Directors or advisory committees; Gilead: Membership on an entity's Board of Directors or advisory committees; Epizyme: Consultancy, Research Funding; ArgenX: Research Funding; MSD: Membership on an entity's Board of Directors or advisory committees; Incyte: Membership on an entity's Board of Directors or advisory committees; Infinity: Membership on an entity's Board of Directors or advisory committees; AZ: Membership on an entity's Board of Directors or advisory committees; Nanostring: Membership on an entity's Board of Directors or advisory committees; Roche: Other: Travel, accommodations, and expenses ; BMS: Membership on an entity's Board of Directors or advisory committees, Other: Travel, accommodations, and expenses . Campbell:Janssen: Honoraria, Research Funding, Speakers Bureau. Jurczak:Servier: Research Funding; Loxo: Membership on an entity's Board of Directors or advisory committees, Research Funding; Novo Nordisk: Research Funding; Takeda: Research Funding; Bayer: Research Funding; Celgene: Research Funding; Roche: Research Funding; Morphosys: Research Funding; TG Therapeutics: Research Funding; Janssen: Membership on an entity's Board of Directors or advisory committees, Research Funding; Celtrion: Research Funding; Sandoz: Membership on an entity's Board of Directors or advisory committees, Research Funding; Incyte: Research Funding; Gilead: Research Funding; AstraZeneca/Acerta: Membership on an entity's Board of Directors or advisory committees, Research Funding. McKay:Epizyme: Consultancy, Honoraria. Opat:Celgene: Consultancy, Honoraria; Roche: Consultancy, Honoraria; Janssen: Consultancy, Honoraria; Mundipharma: Consultancy, Honoraria. Radford:GSK: Equity Ownership; ADC Therapeutics: Consultancy, Research Funding; Takeda: Consultancy, Honoraria, Research Funding; BMS: Consultancy, Honoraria; AstraZeneca: Equity Ownership, Research Funding; Novartis: Consultancy, Honoraria; Seattle Genetics: Consultancy, Honoraria. Whalen:Epizyme: Employment, Equity Ownership. Rajarethinam:Epizyme: Employment, Equity Ownership. Navia:Epizyme: Employment, Equity Ownership. Adib:Epizyme: Employment, Equity Ownership. Salles:Amgen: Honoraria, Other: Educational events; Autolus: Consultancy, Membership on an entity's Board of Directors or advisory committees; BMS: Honoraria; Epizyme: Consultancy, Honoraria; Merck: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Novartis, Servier, AbbVie, Karyopharm, Kite, MorphoSys: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Educational events; Roche, Janssen, Gilead, Celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Educational events; Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Educational events.

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Alkaline Phosphatase (ALP) Variation During Carfilzomib Treatment Is Associated to Best Response in Multiple Myeloma.

Blood ◽

10.1182/blood.v114.22.2865.2865 ◽

2009 ◽

Vol 114 (22) ◽

pp. 2865-2865 ◽

Cited By ~ 2

Author(s):

Maurizio Zangari ◽

Latha Polavaram ◽

Fenghuang Zhan ◽

Guido J. Tricot ◽

Ravi Vij ◽

...

Keyword(s):

Retrospective Analysis ◽

Board Of Directors ◽

Research Funding ◽

Single Agent ◽

Proteasome Inhibitors ◽

Phase 2 ◽

Two Phase ◽

Advisory Committees ◽

Best Response ◽

Ortho Biotech

Abstract Abstract 2865 Poster Board II-841 BACKGROUND: The ubiquitin-proteasome pathway, which has been shown to be an essential cellular degradative system in myeloma cells, can also regulate bone formation through its effects on osteoblast differentiation. Retrospective analysis of variation of ALP during treatment with bortezomib indicates a close correlation between myeloma response and serum ALP levels which multiple studies have shown to be of bone origin. To determine if this effect is a class effect of proteasome inhibitors (PIs), this retrospective study analyzed variation of ALP in relationship to myeloma response during treatment with carfilzomib, the first in a new class of selective epoxyketone PIs that has demonstrated encouraging safety and efficacy in two phase 2 studies of relapsed or refractory myeloma patients. METHODS: Retrospective analysis of serum ALP was performed on relapsed or refractory myeloma patients enrolled on two phase 2 studies (PX-171-003 and PX- 171-004) evaluating the safety and efficacy of single agent carfilzomib. We analyzed data from 38 patients in the first cohort of the PX-171-003 study, a relapsed and refractory myeloma trial for patients who have received ≥ 3 prior therapies including bortezomib and an IMiD and 29 patients in PX-171-004, a relapsed or refractory myeloma trial that included bortezomib naïve patients. All patients received 20 mg/m2 of carfilzomib on Days 1, 2, 8, 9, 15, and 16 of a 28-day cycle. RESULTS: Seventy-seven patients were enrolled. The median age was 63 years with a median time since diagnosis of 4.6 years, 52% were male, 84.% had relapsed after autologous transplants, 82.% were previously exposed to bortezomib, and 92% were previously exposed to an IMiD. Sixty seven patients with ALP data were evaluable for response. In PX-171-003 the ORR (≥PR) was 18% and the clinical benefit response (CBR; ≥MR) was 26%, while in PX-171-004 the ORR was 35.5% overall and 57% in bortezomib naive patients. ALP increment from baseline, which was most evident during the second cycle of treatment, was statistically different in patients who achieved ≥VGPR compared to all others on Days 1 (P=0.0049) and 8 (P=0.006) of Cycle 2. In all patients achieving a VGPR or better, ALP increased more than 15 units per liter at Cycle 2 Day 1 over baseline An ALP increase over the same period of time was seen in 26 %, 13%, and 11% of patients achieving PR, MR, and SD, respectively. None of the patients with progressive disease exhibited a similar increase. Our study indicates that response first assessed on Day 15 of Cycle 1 parallels the ALP elevation which returned to baseline levels at the end of Cycle 3. CONCLUSIONS: This retrospective analysis on a subset of patients in these ongoing phase 2 studies of single agent carfilzomib in relapsed or refractory multiple myeloma suggests that elevation in ALP may be associated with best response. Taken with previous publications describing bortezomib treatment, these results suggest that this specific anabolic bone phenomenon could be a class effect of proteasome inhibitors. These phase 2 studies are ongoing with a higher dose of carfilzomib (27 mg/m2) being evaluated. The data from this small subset analysis suggests that further exploration of this relationship is warranted. Disclosures: Zangari: Milllennium: Honoraria, Research Funding; Novartis: Research Funding; Celgene: Honoraria; OrthoBiotech: Honoraria; Optum Health: Honoraria; Educational Concepts Group, LLC: Membership on an entity's Board of Directors or advisory committees. Vij:Proteolix: Consultancy, Research Funding. Jagannath:Millennium: Honoraria, Membership on an entity's Board of Directors or advisory committees; Celgene: Honoraria; Merck: Honoraria. Siegel:Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Millennium: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Stewart:Millennium: Consultancy, Research Funding; Proteolix: Consultancy, Honoraria; Novartis: Consultancy, Honoraria; Celgene: Honoraria. Wang:Proteolix: Honoraria, Research Funding. Belch:Ortho Biotech: Honoraria, Research Funding. Jakubowiak:Millennium Pharmaceuticals, Inc.: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Centocor Ortho Biotech: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Exelixis: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Bristol-Myers-Squibb: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Trudel:Celgene: Honoraria, Speakers Bureau; Ortho Biotech: Honoraria. Bahlis:Celgene: Honoraria, Speakers Bureau; Ortho Biotech: Honoraria, Speakers Bureau. Lonial:Celgene: Consultancy; Millennium: Consultancy, Research Funding; BMS: Consultancy; Novartis: Consultancy; Gloucester: Research Funding. Singhal:Celgene: Speakers Bureau; Millennium: Speakers Bureau.

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Phase 1b Evaluation of the Safety and Efficacy of a 30-Minute IV Infusion of Carfilzomib In Patients with Relapsed and/or Refractory Multiple Myeloma

Blood ◽

10.1182/blood.v116.21.3024.3024 ◽

2010 ◽

Vol 116 (21) ◽

pp. 3024-3024 ◽

Cited By ~ 1

Author(s):

Kyriakos Papadopoulos ◽

David Samuel diCapua Siegel ◽

Seema B. Singhal ◽

Jeffrey R. Infante ◽

Edward A. Sausville ◽

...

Keyword(s):

Multiple Myeloma ◽

Peripheral Blood ◽

Research Funding ◽

Mononuclear Cells ◽

Single Agent ◽

Proteasome Inhibition ◽

Response Assessment ◽

Phase 2 ◽

Peripheral Blood Mononuclear ◽

Phase 1B

Abstract Abstract 3024 Background: Carfilzomib (CFZ) is a novel, highly selective, epoxyketone proteasome inhibitor. In two separate Phase 2 trials in patients (pts) with relapsed and/or refractory (R/R) multiple myeloma (MM), single-agent CFZ administered as an IV bolus over 1–10 minutes has demonstrated durable activity at 20/27 mg/m2 and is well-tolerated with no clinically significant cumulative toxicity. In rats, significantly improved tolerability of CFZ was obtained following administration as a 30 min infusion as compared to a rapid IV bolus. Notably, a dose of 48 mg/m2 via IV bolus resulted in 50% lethality, compared to minimal toxicity without lethality at the same dose via a 30 min infusion. The reduced toxicity with 30-min infusion may reflect the role of Cmax (45 μM for bolus vs. 1.5 μM for infusion), since proteasome inhibition in blood and tissue was equivalent in both groups. Here we report on the results of administration of CFZ as a 30-minute IV infusion in a Phase 1b study in pts with R/R MM. The goals of this study are to determine the maximum recommended dose for infusion, safety, efficacy, pharmacokinetics (PK), and pharmacodynamic (PD) parameters. Methods: This Phase 1b trial is enrolling pts with R/R MM after ≥2 prior treatment failures. CFZ is given as a 30-minute IV infusion on days (D) 1, 2, 8, 9, 15, and 16 of a 28-day cycle (C) until progression. Dosing in all cohorts is initiated at 20 mg/m2 for the first two doses, with subsequent escalation to 36, 45, 56, or 70 mg/m2. Dose escalation follows standard 3+3 rules. Dexamethasone (4 mg for doses up to 45 mg/m2) is given prior to each infusion, with 8 mg given at higher doses. Responses by IMWG Uniform Response Criteria are measured at every C. Plasma samples for PK analysis and peripheral blood samples for PD analysis were obtained from pts at C1D1 (20 mg/m2) and C2D1 (all dose cohorts). Results: To date, 16 pts with R/R MM have been enrolled in the Phase 1b infusion study (4 at 36 mg/m2; 3 at 45 mg/m2; 7 at 56 mg/m2 and 2 at 70 mg/m2). Pts have remained on study for a median of 4 cycles (range 1–13+). Dose Limiting Toxicity (DLT) was observed in both pts treated at 70 mg/m2: reversible Grade (G) 3 renal failure in one pt within 24-hours following his first dose at 70 mg/m2 (C1D8); reversible G3 fatigue with fevers 4 days following four doses of 70 mg/m2 (C1 D20). Both pts were successfully rechallenged and continue on treatment. Seven patients have started dosing at 56 mg/m2; to date, one DLT (reversible G3 hypoxia with fevers) was observed. Thirteen pts are evaluable for efficacy (2 pts withdrew prior to 1st response assessment; 1 pt is too early to assess). Responses, time on study and prior regimens are detailed in the following table. Preliminary PK analysis demonstrates that the Cmax with 30-minute infusion is lower than obtained with a 5–10 minute IV bolus of the same dose. Inhibition of proteasome activity in red blood cells (RBCs) and peripheral blood mononuclear cells (PBMCs) was >80% at 20 mg/m2 and >90% at 36 mg/m2 and above. Common adverse events (AEs) with CFZ delivered as a 30-minute infusion have included fatigue, fevers, myalgias, diarrhea, nausea, thrombocytopenia, and reversible elevations in serum creatinine. There have been no episodes of worsening of baseline peripheral neuropathy or hepatotoxicity. Conclusions: In pts with R/R MM, single-agent CFZ as 30-minute IV infusion is both active and well-tolerated at doses ≥36 mg/m2; the dose level of 56 mg/m2 is being expanded as the recommended phase 2 dose on this schedule. Responses were seen in 8 out of 13 evaluable MM pts, including three VGPRs in pts who had received 5–7 prior regimens. Similar to animal studies, improved safety outcomes in MM patients can be achieved with near complete proteasome inhibition when CFZ is administered as a 30-minute infusion. An additional schedule of CFZ using weekly dosing (30-minute infusion for 5 weeks out of every 6) will be investigated in this trial. Disclosures: Papadopoulos: Onyx Pharmaceuticals: Consultancy, Research Funding. Siegel:Millenium: Consultancy, Honoraria; Celgene: Consultancy, Honoraria. Singhal:Celgene: Speakers Bureau; Takeda/Millenium: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Onyx: Research Funding. Gordon:Onyx Pharmaceuticals: Research Funding. Kauffman:Onyx Pharmaceuticals: Employment. Woo:Onyx Pharmaceuticals: Employment. Lee:Onyx Pharmaceuticals: Employment. Bui:Onyx Pharmaceuticals: Employment. Hannah:Onyx Pharmaceuticals: Consultancy.

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An Open-Label Phase 2 Study Of Ofatumumab In Combination With a Novel AKT Inhibitor (Afuresertib) In Previously Treated Patients With Chronic Lymphocytic Leukemia (CLL)

Blood ◽

10.1182/blood.v122.21.4175.4175 ◽

2013 ◽

Vol 122 (21) ◽

pp. 4175-4175

Author(s):

Christine I. Chen ◽

Susi Snitzler ◽

Trina Wang ◽

Harminder Paul ◽

Lisa W Le ◽

...

Keyword(s):

Board Of Directors ◽

Research Funding ◽

Single Agent ◽

Treatment Phase ◽

Phase 2 ◽

Akt Inhibitor ◽

Advisory Committees ◽

Phase 2 Study ◽

Previously Treated ◽

Grade 3

Abstract Introduction Ofatumumab is a novel anti-CD20 monoclonal antibody which led to impressive single-agent responses of 47-58% in a phase 2 study of CLL patients (pts) with refractory disease (Wierda et al 2010). Unfortunately, response durations were short (median 5.6-7.1 mos). In order to improve upon these results, we combined ofatumumab with a novel pan-AKT kinase inhibitor, afuresertib (GSK2110183). The AKT pathway plays a centralized role in tumor differentiation, migration, proliferation and survival and is frequently aberrantly activated in CLL (Longo et al 2007). Single agent afuresertib is very well-tolerated with minimal myelotoxicity in relapsed/refractory hematologic malignancies (Spencer et al ASH 2011). We present an interim analysis of the initial 19 of 31 planned pts in an ongoing trial of ofatumumab and afuresertib in relapsed/refractory CLL. Methods Previously treated CLL pts who have received at least one prior fludarabine-containing regimen with disease progression are eligible. During the initial 6 month Treatment Phase, ofatumumab 2000mg IV is administered weekly for 8 doses, then once every 4 week cycle for 4 doses (dose/schedule identical to the pivotal phase 2 trial) with afuresertib 125mg orally daily. An initial 10 day Lead-in Phase with afuresertib alone allows for evaluation of pharmacodynamic (PD) changes in phosphoproteins and pharmacokinetic (PK) studies. Pts are assessed for safety and response on day 1 of each cycle. Pts achieving SD, PR or CR by the end of the Treatment Phase proceed to the Maintenance Phase with single-agent afuresertib for a maximum of 12 mos (12 cycles). Results Demographics: To date, 19 pts have been enrolled. Median age is 65 yrs (range 43-76), baseline median Hb 108g/L (range 80-145), absolute lymphocytes 29.7 x109/L (range 1.0-464.9), β2M 4.42mg/L (range 1.42-3.21), bulky nodes ≥5cm in 5 pts (32%), organomegaly in 8 pts (42%), del17p/del11q on FISH in 9 pts (47%), and ZAP70+ in 13 pts (68%). Eight pts (42%) were fludarabine-refractory; only 2 pts had received prior alemtuzumab. The median number of prior therapies was 2 (range 1-6). Toxicity: Hematologic: 4 pts (21%) developed Gr 3-4 neutropenia during at least 1 cycle; 1 pt (5%) had a febrile neutropenia event. Only 2 pts (10.5%) have developed Gr 3-4 thrombocytopenia, without bleeding. Nonhematologic toxicity: Most common related grade 3-4 toxicities were GI: dyspepsia (53%), diarrhea (37%), nausea (21%), temporally related to oral afuresertib and easily managed symptomatically. Infusion reactions to ofatumumab were frequent (12 pts; 63%) with grade 3 reactions in 3 pts. Five pts (26%) developed non-infectious pneumonitis, with 3 pts requiring hospitalization. Two pts with preexisting atrial arrhythmias sustained exacerbation with weekly ofatumumab infusions. Most infections were mild, with only 1 grade 3 cellulitis. Efficacy: Of the 19 response-evaluable pts receiving a median of 6 cycles (range 1-9), 8 pts (42%) have achieved a PR, 11 SD (58%), and no CR. Response onset was rapid at a median 0.9 mos (range 0.8-2.8). At a median follow-up of 6.8 mos (range 0.3-12.9 mos), 5 pts (26%) have progressed and one patient has died after cycle 1 on therapy due to progressive CLL. PD Studies: CD19+ cells are assayed for phosphorylated AKT and its downstream targets RAS40 and GSK3 in addition to phospho-proteins of alternative pathways including ERK and pS6 by multiplexed phospho-flow cytometry. Peripheral blood samples are collected at screening and on cycle 1 day 10, after dosing with afuresertib. Of the 7 patients evaluated thus far, 5 demonstrated constitutive AKT phosphorylation at baseline. Partial inhibition of AKT signaling evidenced by increased phosphorylation of AKT and inhibition of GSK3 and/or RAS40 phosphorylation in response to BCR stimulation was observed post-treatment, indicating target engagement by afuresertib. PK Studies: Afuresertib exposure (Cmax and AUC) was similar when afuresertib was administered alone or in combination with ofatumumab. Conclusion Preliminary results from this phase 2 study suggests that a combination of ofatumumab plus a novel oral AKT inhibitor, afuresertib, has activity in previously treated CLL and is generally well-tolerated with minimal myelotoxicity. Response data are encouraging but whether durable responses can be achieved requires more mature follow-up. Disclosures: Chen: Johnson & Johnson: Consultancy, Research Funding; Lundbeck: Consultancy; Celgene: Consultancy, Research Funding; GlaxoSmithKline: Research Funding; Roche: Honoraria. Off Label Use: Off-label use of ofatumumab and afuresertib for the treatment of relapsed/refractory CLL. Smith:GSK: Employment, Equity Ownership. Johnston:Roche: Membership on an entity’s Board of Directors or advisory committees, Research Funding; Lundbeck: Membership on an entity’s Board of Directors or advisory committees, Research Funding; GSK: Membership on an entity’s Board of Directors or advisory committees, Research Funding.

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Nanatinostat (Nstat) and Valganciclovir (VGCV) in Relapsed/Refractory (R/R) Epstein-Barr Virus-Positive (EBV +) Lymphomas: Final Results from the Phase 1b/2 VT3996-201 Study

Blood ◽

10.1182/blood-2021-152603 ◽

2021 ◽

Vol 138 (Supplement 1) ◽

pp. 623-623

Author(s):

Bradley M. Haverkos ◽

Onder Alpdogan ◽

Robert Baiocchi ◽

Jonathan E Brammer ◽

Tatyana A. Feldman ◽

...

Keyword(s):

T Cell ◽

B Cell ◽

Board Of Directors ◽

Research Funding ◽

Cell Lymphoma ◽

B Cell Lymphoma ◽

T Cell Lymphoma ◽

Phase 2 ◽

Advisory Committees ◽

Phase 1B

Abstract Introduction: EBV can be associated with several types of lymphomas, with reported frequencies of up to 8-10% in diffuse large B cell lymphoma (DLBCL), 30-100% in peripheral T cell lymphoma (PTCL) subtypes, 80% in post-transplant lymphoproliferative disease (PTLD), and 15-30% in classical Hodgkin lymphoma (HL), with adverse impact on outcomes. Nanatinostat (Nstat) is a Class-I selective oral HDAC inhibitor that induces the expression of the lytic BGLF4 EBV protein kinase in EBV + tumor cells, activating ganciclovir (GCV) via phosphorylation. This results in GCV-induced inhibition of viral and cellular DNA synthesis and apoptosis. Herein we report the final results from this exploratory study for patients with R/R EBV + lymphomas (NCT03397706). Methods: Patients aged ≥18 with histologically confirmed EBV + lymphomas (defined as any degree of EBER-ISH positivity), R/R to ≥1 prior systemic therapies with an absolute neutrophil count ≥1.0×10 9/L, platelet count ≥50×10 9/L, and no curative treatment options per investigator were enrolled into 5 dose escalation cohorts to determine the recommended phase 2 doses (RP2D) of Nstat + VGCV for phase 2 expansion. Phase 2 patients received the RP2D (Nstat 20 mg daily, 4 days per week + VGCV 900 mg orally daily) in 28-day cycles until disease progression or withdrawal. Primary endpoints were safety/RP2D (phase 1b) and overall response rate (ORR) (phase 2); secondary endpoints were pharmacokinetics, duration of response (DoR), time to response, progression free survival and overall survival. Responses were assessed using Lugano 2014 response criteria beginning at week 8. Results: As of 18 June 2021, 55 patients were enrolled (phase 1b: 25; phase 2: 30). Lymphoma subtypes were DLBCL (n=7), extranodal NK/T-cell (ENKTL) (n=9), PTCL, not otherwise specified (PTCL-NOS) (n=5), angioimmunoblastic T cell lymphoma (n=6), cutaneous T cell (n=1), HL (n=11), other B cell (n=3), and immunodeficiency-associated lymphoproliferative disorders (IA-LPD) (n=13), including PTLD (n=4), HIV-associated (n=5), and other [n=4: systemic lupus erythematosus (SLE) (n=2), common variable/primary immunodeficiency (n=2)]. Median age was 60 years (range 19-84), M/F 35/20, median number of prior therapies was 2 (range 1-11), 76% had ≥2 prior therapies, 78% were refractory to their most recent prior therapy, and 84% had exhausted standard therapies. EBER positivity ranged from <1 to 90% in 42 tumor biopsies with central lab review. The most common treatment-emergent adverse events (TEAEs) of all grades were nausea (38%), neutropenia (34%), thrombocytopenia (34%), and constipation (31%). Grade 3/4 TEAEs in >10% of patients included neutropenia (27%), thrombocytopenia (20%), anemia (20%), and lymphopenia (14%). Dose reductions and interruptions due to treatment-related AEs were reported in 14 (25%) and 16 (29%) patients, respectively. Only 1 patient had to discontinue therapy. There were no cases of CMV reactivation. For 43 evaluable patients (EBER-ISH + with ≥ 1 post-treatment response assessment) across all histologies, the investigator-assessed ORR and complete response (CR) rates were 40% (17/43) and 19% (8/43) respectively. Patients with T/NK-NHL (n=15; all refractory to their last therapy) had an ORR of 60% (n=9) with 27% (n=4) CRs. Two patients (ENKTL and PTCL-NOS) in PR and CR respectively were withdrawn at 6.7 and 6.6 months (m) respectively for autologous stem cell transplantation. For DLBCL (n=6), ORR/CR was 67%/33% (both CRs were in patients refractory to first-line R-CHOP). For IA-LPD (n=13), ORR/CR was 30%/20% (PTLD: 1 CR, other: 1 CR, 1 PR). For HL (n=10), there was 1 PR (4 SD). The median DoR for all responders was 10.4 m, with a median follow-up from response of 5.7 m (range 1.9-34.1 m). For the 17 responders, 8 lasted ≥ 6 months. Conclusions: The combination of Nstat and VGCV was well-tolerated with a manageable toxicity profile and shows promising efficacy in patients with R/R EBV + lymphomas, particularly in refractory T/NK-NHL, a heterogeneous group of aggressive lymphomas with dismal outcomes, with multiple durable responses. Further evaluation of this novel combination therapy for the treatment of recurrent EBV + lymphomas is ongoing in the phase 2 VT3996-202 trial. Disclosures Haverkos: Viracta Therapeutics, Inc.: Honoraria, Research Funding. Baiocchi: Prelude Therapeutics: Consultancy; viracta: Consultancy, Current holder of stock options in a privately-held company; Codiak Biosciences: Research Funding; Atara Biotherapeutics: Consultancy. Brammer: Seattle Genetics: Speakers Bureau; Celgene: Research Funding; Kymera Therapeutics: Consultancy. Feldman: Alexion, AstraZeneca Rare Disease: Honoraria, Other: Study investigator. Brem: Karyopharm: Membership on an entity's Board of Directors or advisory committees; SeaGen: Speakers Bureau; BeiGene: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Bayer: Membership on an entity's Board of Directors or advisory committees; KiTE Pharma: Membership on an entity's Board of Directors or advisory committees; TG Therapeutics: Consultancy; ADC Therapeutics: Membership on an entity's Board of Directors or advisory committees; Pharmacyclics/Janssen: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Morphosys/Incyte: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Scheinberg: Roche: Consultancy; Abbvie: Consultancy; BioCryst Pharmaceuticals: Consultancy; Alexion pharmaceuticals: Consultancy, Honoraria, Speakers Bureau; Novartis: Consultancy, Honoraria, Speakers Bureau. Joffe: AstraZeneca: Consultancy; Epizyme: Consultancy. Katkov: Viracta Therapeutics, Inc.: Current Employment. McRae: Viracta Therapeutics, Inc.: Current Employment. Royston: Viracta Therapeutics, Inc.: Current Employment. Rojkjaer: Viracta Therapeutics, Inc.: Current Employment. Porcu: Viracta: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Innate Pharma: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; BeiGene: Membership on an entity's Board of Directors or advisory committees, Research Funding; Incyte: Research Funding; Daiichi: Honoraria, Research Funding; Kiowa: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Spectrum: Consultancy; DrenBio: Consultancy.

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Venetoclax in Combination with FLAG-IDA Chemotherapy (FLAG-V-I) for Fit, Relapsed/Refractory AML Patients: Interim Results of a Phase 1b/2 Dose Escalation and Expansion Study

Blood ◽

10.1182/blood-2018-99-114812 ◽

2018 ◽

Vol 132 (Supplement 1) ◽

pp. 4048-4048 ◽

Cited By ~ 10

Author(s):

Courtney D. DiNardo ◽

Maher Albitar ◽

Tapan M. Kadia ◽

Kiran Naqvi ◽

Kenneth Vaughan ◽

...

Keyword(s):

Adverse Events ◽

Research Funding ◽

Single Agent ◽

Response Assessment ◽

Early Mortality ◽

Genetics Research ◽

Best Response ◽

Significant Difference ◽

Phase 1B ◽

Refractory Aml

Abstract Background: Venetoclax (VEN) is a potent and selective small molecule BCL2 inhibitor, with activity both as a single agent in relapsed/refractory AML, and in frontline combinations with hypomethylating agents and low-dose cytarabine. The ability of VEN to reduce the apoptotic threshold indicates it may be effective in combination with genotoxic agents which induce apoptosis, such as the FLAG-IDA regimen. Objectives: A Phase 1b/2 clinical trial was designed to assess the safety and efficacy of VEN in combination with FLAG-IDA induction/consolidation. The primary safety endpoint was the overall incidence and severity of adverse events by CTCAE criteria. The primary efficacy endpoint was ORR by modified IWG AML criteria, and defined as CR, CRi, and PR. Secondary analyses include duration of response (DOR) and overall survival (OS), and exploratory analyses include gene expression signatures by RNA sequencing. Methods: Eligibility for the Phase 1b portion includes medically fit, relapsed/refractory (R/R) AML patients of any age with adequate organ function and ECOG PS ≤ 2. Patients receive FLAG-IDA induction/consolidation, in combination with VEN orally daily. FLAG-IDA induction for R/R AML consists of fludarabine 30 mg/m2 IV days 2-6, cytarabine 2 g/m2 IV days 2-6, idarubicin 6 mg/m2 IV days 4-6, and filgrastim 5 mcg/kg daily days 1-7 (or peg-filgrastim 6 mg after day 5 to replace remaining injections). The first cohort (dose -1) received FLAG-IDA with VEN 200 mg on days 1-21 of induction, incorporating a 2-day VEN dose ramp up. After the observation of gram-negative bacteremia and/or sepsis in 5 of the first 6 patients during cycle 1 nadir, an amended dose level -1 induction was designed with VEN 200 mg on days 1-14 and cytarabine 1.5 g/m². After completion of induction/consolidation, single-agent VEN at 400 mg orally continuously is provided as maintenance for patients not proceeding to SCT. The data cutoff for this analysis was 7.26.2018. Results: Twelve patients with a median age of 49 years (range 32 - 72) have been enrolled. All patients had relapsed/refractory AML with a median of 2 (range 1 - 4) prior treatments, and four (33%) patients had received ≥1 prior allogeneic SCT. Six patients (50%) had complex cytogenetics, 3 (25%) were intermediate risk, and 3 (25%) were favorable risk. Additional demographics including molecular annotation at study enrollment are provided in Table 1. The median number of FLAG-IDA + VEN cycles received is 2 (0.5 - 3). Severe adverse events regardless of causality were neutropenic fever/bacteremia (n=5), pneumonia/lung infection (n=4), sepsis (n=4), typhlitis (n=1), and hypotension (n=2). All cases of sepsis occurred in the original dose -1 cohort. No early mortality was observed on study (30-d and 60-d mortality 0%). Of 12 patients, one remains too early for response assessment. Of 11 patients, 8 patients (73%) achieved a best response of CR/CRi (7 CR, 1 CRi). Seven patients attained a best response within the first induction cycle, and one attained blast reduction after cycle 1 followed by CR after re-induction. Median time to ANC recovery > 500/ul in responding patients was 28 days (range 23 to 33 days). Of the 8 responding patients, three patients proceeded to allogeneic SCT, 2 remain on study, 2 patients relapsed, and 1 patient died in CR. Figure 1 depicts OS and DOR. With a median follow-up time of 4 months to date, median DOR has not been reached and the 6-month OS is 67%. NGS evaluation of RNA at pre-treatment and end of cycle 1 (EOC1) timepoints demonstrated no significant difference in BCL2 expression, either before/after therapy per patient, or based on clinical response. In patients who failed to achieve CR/CRi, significantly lower EOC1 expression (p=0.05) of BAX, BCLXL, BCL10, BCL2A1, BCL3, BCL9, TRS1, and TP53 was identified. Additionally, increased MCL1 expression at EOC1 was significantly (p=0.04) associated with relapse. Conclusion: FLAG-IDA chemotherapy with venetoclax demonstrates notable activity in a heavily pre-treated and R/R yet medically fit patient population. Neither prolonged cytopenias nor early mortality was observed. The ongoing Phase 1b portion aims to establish the best VEN dose in combination with intensive chemotherapy, to be followed with a Phase 2 portion with treatment arms for both newly diagnosed and R/R AML patients. Disclosures DiNardo: Medimmune: Honoraria; Bayer: Honoraria; Karyopharm: Honoraria; Abbvie: Honoraria; Celgene: Honoraria; Agios: Consultancy. Albitar:Neogenomics Laboratories: Employment. Kadia:Abbvie: Consultancy; Jazz: Consultancy, Research Funding; BMS: Research Funding; BMS: Research Funding; Celgene: Research Funding; Abbvie: Consultancy; Takeda: Consultancy; Novartis: Consultancy; Pfizer: Consultancy, Research Funding; Pfizer: Consultancy, Research Funding; Novartis: Consultancy; Amgen: Consultancy, Research Funding; Jazz: Consultancy, Research Funding; Amgen: Consultancy, Research Funding; Takeda: Consultancy; Celgene: Research Funding. Ravandi:Bristol-Myers Squibb: Research Funding; Xencor: Research Funding; Sunesis: Honoraria; Macrogenix: Honoraria, Research Funding; Abbvie: Research Funding; Amgen: Honoraria, Research Funding, Speakers Bureau; Jazz: Honoraria; Jazz: Honoraria; Amgen: Honoraria, Research Funding, Speakers Bureau; Orsenix: Honoraria; Macrogenix: Honoraria, Research Funding; Orsenix: Honoraria; Astellas Pharmaceuticals: Consultancy, Honoraria; Xencor: Research Funding; Sunesis: Honoraria; Seattle Genetics: Research Funding; Abbvie: Research Funding; Astellas Pharmaceuticals: Consultancy, Honoraria; Bristol-Myers Squibb: Research Funding; Seattle Genetics: Research Funding. Cortes:Novartis: Consultancy, Research Funding; Daiichi Sankyo: Consultancy, Research Funding; Pfizer: Consultancy, Research Funding; Astellas Pharma: Consultancy, Research Funding; Arog: Research Funding. Konopleva:Stemline Therapeutics: Research Funding.

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