scholarly journals Pralatrexate in Combination with Cyclophosphamide, Doxorubicin, Vincristine, and Prednisone (CHOP) in Previously Untreated Patients with Peripheral T-Cell Lymphoma (PTCL): A Phase 1 Dose-Escalation Study

Blood ◽  
2017 ◽  
Vol 130 (Suppl_1) ◽  
pp. 818-818 ◽  
Author(s):  
Andrei Shustov ◽  
Patrick B Johnston ◽  
Stefan Klaus Barta ◽  
Gajanan Bhat ◽  
Guru Reddy ◽  
...  
Keyword(s):  
T Cell ◽  
Dose Escalation ◽  
Cell Lymphoma ◽  
Phase 1 ◽  
T Cell Lymphoma ◽  
Peripheral T Cell Lymphoma ◽  
Dose Escalation Study ◽  
Chop Regimen ◽  
Treatment Naïve ◽  
Grade 3

Abstract Background: The prognosis of patients with PTCL remains poor after standard CHOP therapy - the most commonly used combination regimen. Relapses occur in the majority of patients, and curability rates of the relapsed disease are very low. Hence, advances in front-line therapy of PTCL are long overdue. Pralatrexate, a second-generation antifolate, demonstrated a single agent activity in patients with relapsed and refractory PTCL with a response rate of 27%, including complete remissions in 11% of patients (O'Connor et al. J Clin Onc 2011). We conducted a Phase 1 multi-center dose-escalation study of pralatrexate in combination with standard CHOP (Fol-CHOP) in treatment-naïve PTCL patients. Objectives: The primary objective of the study was to determine the maximum tolerated dose (MTD) of pralatrexate when administered with a standard CHOP regimen to patients with newly diagnosed PTCL. The secondary objectives included safety, tolerability, efficacy and pharmacokinetics of pralatrexate in combination with CHOP (Fol-CHOP). Methods: In Part 1 of this 3+3 dose-escalation study, pralatrexate was administered at 10, 15, 20, 25, or 30 mg/m2 as an IV push on days 1 and 8 of a standard 21-day CHOP regimen (cyclophosphamide 750 mg/m2, doxorubicin 50 mg/m2, vincristine 1.4 mg/m2 [maximum 2 mg] on day 1 and oral prednisone 100 mg on days 1-5). In Part 2 of the study patients were treated at the MTD of pralatrexate established in Part 1, with standard CHOP. In both parts of the study patients were treated with up to 6 cycles of therapy, or until toxicity or disease progression. Patients received antimicrobial prophylaxis, myeloid growth factor support, and "leucovorin rescue" throughout 6 cycles of therapy. Dose-limiting toxicities (DLT) were considered during the 1st cycle of Fol-CHOP and included: Grade 4 infections, treatment-related non-hematological toxicity ≥Grade 3, platelet count < 25 X 109/L at any time, or ANC < 0.5 X 109/L for >7 days despite G-CSF administration. Responses were assessed by the investigator per the Revised Response Criteria for Malignant Lymphoma (Cheson 2007). Results: A total of 31 patients have been enrolled (19 in Part 1; 12 in Part 2). MTD was not reached and pralatrexate dose of 30 mg/m2 in combination with CHOP was selected for Part 2 of the study as predefined by the protocol. The majority of patients were male, White, with the median age of 66 yrs (range, 18-78) at the time of enrolment. PTCL diagnoses included: anaplastic large cell lymphoma, anaplastic lymphomakinase-negative (ALCL, ALK-, n=5), peripheral T-cell lymphoma, not-otherwise specified (PTCL-NOS, n=18), and angioimmunoblastic T-cell lymphoma (AITL, n=5). Fol-CHOP was generally well tolerated with median RDI of 98%. Common (≥ 30%) adverse events (AEs) of any grade were fatigue (n=23), constipation (n=20), nausea (n=16), mucositis (n=14), diarrhea (n=12), anemia (n=9), vomiting (n=10) and oral pain (n=10). Most common (≥ 10%) AEs ≥ grade 3 were anemia (n=6), fatigue (n=4) and neutrophil count decreas (n=5). The only Grade >3 treatment-related AEs (≥10%) was neutrophil count decrease (n=4). SAEs were observed in 13 patients, treatment related SAEs were anemia, febrile neutropenia, dehydration, mucositis and nausea. Five patients withdrew from study: 2 due to disease progression, 1 due to AE and 2 due lapse >28 days between doses. In the 27 patients avaluable for response, the investigator assessed objective response (OR) and complete response (CR) rates were 89% wand 67%, respectively. Conclusions: The combination of pralatrexate and CHOP was well tolerated in treatment-naive PTCL patients. MTD of pralatrexate was not reached, and the protocol-defined maximum dose of 30 mg/m2 on days 1 and 8 of a 21-day CHOP cycle was recomended for future studies. The observed OR and CR rates warrant further evaluation of this regimen in newly diagnosed PTCL patients. Disclosures Shustov: Celgene: Other: Publication assistance; Spectrum Pharmaceuticals: Consultancy, Research Funding. Bhat: Spectrum Pharmaceuticals: Employment. Reddy: Spectrum Pharmaceuticals: Employment.

Lenalidomide in relapsed adult T-cell leukaemia-lymphoma or peripheral T-cell lymphoma (ATLL-001): a phase 1, multicentre, dose-escalation study

2016 ◽  
Vol 3 (3) ◽  
pp. e107-e118 ◽  
Author(s):  
Michinori Ogura ◽  
Yoshitaka Imaizumi ◽  
Naokuni Uike ◽  
Norio Asou ◽  
Atae Utsunomiya ◽  
...  
Keyword(s):  
T Cell ◽  
Dose Escalation ◽  
Cell Lymphoma ◽  
Phase 1 ◽  
T Cell Lymphoma ◽  
Cell Leukaemia ◽  
Peripheral T Cell Lymphoma ◽  
Dose Escalation Study

scholarly journals A Dose Escalation Study of RP6530, a Novel Dual PI3K δ/γ Inhibitor, in Patients with Relapsed/Refractory T-Cell Lymphoma

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 3004-3004 ◽  
Author(s):  
Yasuhiro Oki ◽  
Auris Huen ◽  
Prajak J Barde ◽  
Kumar Penmetsa ◽  
Alda Ashu ◽  
...  
Keyword(s):  
T Cell ◽  
Adverse Events ◽  
Dose Escalation ◽  
Cell Lymphoma ◽  
Phase 1 ◽  
Performance Status ◽  
T Cell Lymphoma ◽  
Clinical Activity ◽  
Dose Escalation Study ◽  
Grade 3

Abstract Introduction: The δ isoform of PI3K is highly expressed in cells of hematopoietic origin. The γ isoform is associated with T-lymphocytes and neutrophils and plays a distinct role in T-cell function. Since δ/γ isoforms are synergistic in the growth and survival of certain T-cell malignancies, dual targeting of PI3K δ/γ is an attractive intervention strategy in patients with T-cell lymphoma. RP6530 is a novel, highly specific dual PI3K δ/γ inhibitor with nanomolar inhibitory potency for both isotypes. It has shown acceptable safety profile and efficacy in patients (pts) with advanced hematologic malignancies in a Phase 1 study (ASH 2015). Herein, we present the preliminary results from an ongoing Phase 1/1b, dose escalation study of RP6530 in 11 pts with mature T-cell neoplasms (NCT02567656). Methods: The study consists of dose escalation cohorts to determine the MTD of RP6530 using a standard 3+3 design, followed by two expansion cohorts enrolling 20 pts with peripheral T-cell lymphoma (PTCL) and 20 pts with cutaneous T-cell lymphoma (CTCL). Pts with a diagnosis of PTCL or CTCL who have received at least one prior systemic therapy, ECOG performance status ≤ 2 and measurable/evaluable disease are eligible. This study evaluated the safety, maximum tolerated dose (MTD), pharmacokinetics, pharmacodynamics, and clinical activity of RP6530 administered twice daily (BID) in 28-day cycles. Responses were evaluated for PTCL and CTCL based on IWG criteria (Cheson 2014) and the modified Severity Weighted Assessment Tool (mSWAT) respectively. Dose limiting toxicity (DLT) was defined by a toxicity of grade 3/4 that is considered related to treatment during the first cycle of treatment. Results: To date eleven pts (6 PTCL and 5 CTCL) (5 males and six females) have been enrolled at three dose levels: 200 mg BID, 400 mg BID and 800 mg BID. ECOG performance status score was 0/1/2 in 10/1/0 pts, respectively, with a mean age of 68 yrs (range 52-76). Pts had a median of 3 (range: 3-6) prior treatment regimens, and 5 pts had refractory disease and 6 relapsed on prior treatments. RP6530 was well tolerated without any DLT or related serious adverse event reported to date. A total of 52 non-serious adverse events were reported: 41 Grade 1/2 and 11 Grade 3/4. The most common adverse events included mild vomiting (18%), diarrhoea (18%), fatigue (18%), and rash (18%). No Grade 3/4 adverse events were deemed related to RP6530 except for ALT/AST elevation in one pt. No pt discontinued treatment due to a safety issue. Dose-proportional increases in plasma concentrations were observed in PKs. Dose escalation is currently ongoing at 800 mg BID. Five pts were evaluated for responses at Cycle 3, Day1. Two pts (1 PTCL and 1 CTCL) experienced PR (40%) that are ongoing >5 months, and three pts experienced stable disease lasting for >3 months (60%). Three pts experienced rapid disease progression during first cycle, and discontinued treatment prematurely. Conclusion: This ongoing study of RP6530 demonstrated an acceptable safety profile at doses evaluated, with a promising clinical activity. The results support further evaluation of RP6530 in pts with mature T-cell neoplasms. Disclosures Oki: Novartis: Research Funding. Barde:Rhizen Pharmaceuticals SA: Employment. Penmetsa:Rhizen Pharmaceuticals SA: Employment. Viswanadha:Incozen Therapeutics: Employment.

Phase I Dose-Escalation Study of Cpi-613, in Combination with Bendamustine, in Relapsed or Refractory T-Cell Non-Hodgkin Lymphoma

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 4163-4163 ◽  
Author(s):  
Zanetta S. Lamar ◽  
Scott Isom ◽  
Rakhee Vaidya ◽  
Anne W Beaven ◽  
Zachariah A. McIver
Keyword(s):  
T Cell ◽  
Dose Escalation ◽  
Response Rate ◽  
Cell Lymphoma ◽  
Phase 1 ◽  
Single Agent ◽  
Hematologic Malignancies ◽  
T Cell Lymphoma ◽  
Non Hodgkin Lymphoma ◽  
Grade 3

Abstract Background:T cell lymphomas account for 10-15% of lymphoid malignancies and display significant heterogeneity. T cell lymphomas have a worse prognosis than most B cell lymphomas. For relapsed or refractory disease, there is not a standard treatment and median progression free and overall survival rates have been reported as 3.7 and 6.5 months, respectively. Therefore, optimal treatment for relapsed/refractory T cell Non-Hodgkin Lymphoma (NHL) is an unmet clinical need. CPI-613 is a lipoate derivative that has shown activity in hematologic malignancies. CPI-613 selectively targets the pyruvate dehydrogenase complex (PDC) and α-ketoglutarate dehydrogenase complex (KGDHC) in tumor cells. CPI-613 leads to the inhibition of the catalytic and regulatory functions of the PDC and the KGDHC causing alterations of mitochondrial enzyme complex activities and altering redox status, leading to apoptosis, necrosis and autophagy of tumor cells. The anti-tumor activity of CPI-613 is evident in various cancer cell lines, xenograft animal tumor models and clinical trials against a diverse group of cancers. Patients tolerate CPI-613 as a single agent at doses up to 3,000 mg/m2, according to Phase 1 trials in patients with solid tumors and hematologic malignancies. Bendamustine has shown single agent activity in the relapsed lymphoma setting with response rates of approximately 50% for T cell NHL. Here, we are conducting a Phase I study in which the primary objective was to evaluate the maximum tolerated dose (MTD) of CPI-613 while administered in combination with Bendamustine. The secondary objective was to determine response rate to treatment. Methods: This study is a phase 1, open label, modified 3+3 dose escalation clinical trial evaluating CPI-613 and Bendamustine combination therapy. CPI-613 was given at escalating doses starting at 2,000mg/m2 over 2 hrs on days 1-4, and on days 8, 11, 15 and 18. Bendamustine was infused at 90 mg/m2 on days 4 and 5 of each treatment cycle. Each treatment cycle was 4 weeks and repeated up to six cycles. Demographics, patient characteristics and dose levels are shown in the table below. There was no intra-patient dose escalation. Results: As of July 27, 2016, eight subjects have received at least one dose of study drug. Eight patients are evaluable for safety and five patients are evaluable for response. The most common grade 3 or higher toxicities were lymphopenia and neutropenia and occurred in 4 subjects. One patient dosed at 2750 mg/m2 had a dose limiting toxicity of grade 3 acute kidney injury and grade 4 lactic acidosis. The protocol was later amended to discontinue dose escalation at doses of 2750 mg/m2 or higher and to expand the 2500mg/m2 cohort. The overall response rate was 80%. Three patients with peripheral T cell lymphoma, NOS, obtained a complete response and 1 patient with mycosis fungoides had a partial response. One patient with T cell acute lymphomoblastic lymphoma had progressive disease. The median time to response is 1.8 months. Enrollment is ongoing and updated trial results will be presented. Conclusions: This first reported study of CPI-613 administration in combination with Bendamustine in subjects with relapsed or refractory T cell lymphoma showed a good safety profile and an excellent overall response rate of 80% with CRs in all three patients with peripheral T cell lymphoma, NOS. Although numbers are small, continued investigation is warranted as these response rates in a poor risk population of patients with relapsed/refractory T cell lymphoma are very exciting. Clinical trial: NCT02168907 Disclosures No relevant conflicts of interest to declare.

scholarly journals Belinostat in combination with standard cyclophosphamide, doxorubicin, vincristine and prednisone as first-line treatment for patients with newly diagnosed peripheral T-cell lymphoma

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Patrick B. Johnston ◽  
Amanda F. Cashen ◽  
Petros G. Nikolinakos ◽  
Anne W. Beaven ◽  
Stefan Klaus Barta ◽  
...  
Keyword(s):  
T Cell ◽  
Cell Lymphoma ◽  
Single Agent ◽  
Dose Intensity ◽  
Maximum Tolerated Dose ◽  
Primary Objective ◽  
T Cell Lymphoma ◽  
Hematologic Toxicity ◽  
Peripheral T Cell Lymphoma ◽  
Grade 3

Abstract Background Belinostat is a histone deacetylase inhibitor approved for relapsed refractory peripheral T-cell lymphoma (PTCL). The primary objective of this study was to determine the maximum tolerated dose (MTD) of belinostat combined with CHOP (Bel-CHOP). Secondary objectives included safety/tolerability, overall response rate (ORR), and belinostat pharmacokinetics (PK). Methods Patients were ≥ 18 years with histologically confirmed, previously untreated PTCL. Patients received belinostat (1000 mg/m2 once daily) + standard CHOP for 6 cycles with varying schedules using a 3 + 3 design in Part A. Part B enrolled patients at MTD dose. Results Twenty-three patients were treated. One patient experienced DLT (Grade 3 non-hematologic toxicity) on Day 1–3 schedule, resulting in escalation to Day 1–5 schedule (n = 3). No DLTs were observed and Day 1–5 schedule with 1000 mg/m2 was declared as MTD. Twelve additional patients were enrolled in Part B using MTD. Median relative dose intensity was 98%. All patients experienced adverse events (AEs), including nausea (78%), fatigue (61%), and vomiting (57%). Serious AEs occurred in 43%, with febrile neutropenia (17%) and pyrexia (13%). Overall ORR was 86% with 71% reported CR at MTD. Belinostat PK parameters were similar to single-agent. Conclusions Bel-CHOP was well tolerated and MTD in CHOP combination was the same dose and schedule as single agent dosing. Trial Registration: ClinicalTrials.gov Identifier: NCT01839097.

A Phase I Open Label Dose Escalation Study To Evaluate MEDI-507 in Patients with CD2-Positive T-Cell Lymphoma/Leukemia.

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 2727-2727 ◽  
Author(s):  
Deborah A. Casale ◽  
Nancy L. Bartlett ◽  
David D. Hurd ◽  
Francine Foss ◽  
Barbara Pro ◽  
...  
Keyword(s):  
T Cell ◽  
Phase I ◽  
Dose Escalation ◽  
Cell Lymphoma ◽  
Tumor Lysis Syndrome ◽  
Lymphocytic Leukemia ◽  
T Cell Lymphoma ◽  
Cell Recovery ◽  
Open Label ◽  
Dose Escalation Study

Abstract This ongoing multicenter study is a Phase I trial with MEDI-507 (Siplizumab) [a humanized IgG1k class monoclonal antibody that binds to the CD2 receptor on human T- and NK-cells] to determine the maximum tolerated dose (MTD) or the optimum biologic dose (OBD) in patients with relapsed/refractory CD2-positive T-cell lymphoma/leukemia [CD2-positive adult T-cell leukemia (ATL), cutaneous T-cell lymphoma (CTCL), peripheral T-cell lymphoma (PTCL), and large granular lymphocytic leukemia (LGL).] Open label 3+3 dose escalation was conducted in which patients receive bi-weekly infusions of MEDI-507 over 3 consecutive days at total doses of 0.7 mg/kg, 3.4 mg/kg or 4.8 mg/kg. Predose and serial MEDI-507 pharmacokinetics (ELISA) at Visit 2 and anti MEDI-507 antibodies (ELISA), peripheral blood total T-Cell and CD2-positive T-cells (flow cytometry), and C3 and C4 complement are obtained for each patient. Patients are followed for one year after their last dose of MEDI-507 for tumor assessment and CD2-positive T-cell recovery. 16 patients have been enrolled: 3 (0.7 mg/kg); 9 (3.4); 4 (4.8). Three additional patients were added to the 3.4 mg/kg cohort to replace patients who progressed early and one patient with tumor lysis syndrome. Diagnoses of the 16 patients: PTCL (9), CTCL (6) and NK-LGL (1). Frequent adverse events reported, to date, are infusion reaction (7/16) patients; hypertension (4/16); lymphopenia (4/16); fatigue (4/16) and leukopenia (3/16). Two DLT’s have been observed. The first, erythematous confluent dermatitis, occurred in one patient at 3.4 mg/kg and the cohort was expanded with eventual dose escalation. The second, pulmonary edema, occurred in one patient at 4.8 mg/kg and the cohort is currently being expanded without further DLT identified to date. Two responses have been observed, one PR in an NK-LGL patient at 3.4 mg/kg and one CR in a PTCL patient at 3.4 mg/kg. MEDI-507 has been well tolerated and shown anti-tumor activity. Dosing will change to weekly dosing with dose escalation (3+3) starting at 1.2 mg/kg as 0.8 mg/kg was seen to be safe in the single center study. MTD and/or OBD have not been determined.

Pralatrexate Is Active in Cutaneous T-Cell Lymphoma (CTCL): Results of a Multicenter, Dose-Finding Trial.

Blood ◽  
2009 ◽  
Vol 114 (22) ◽  
pp. 919-919
Author(s):  
Steven M. Horwitz ◽  
Madeleine Duvic ◽  
Youn Kim ◽  
Jasmine M Zain ◽  
Mary Jo Lechowicz ◽  
...  
Keyword(s):  
T Cell ◽  
Adverse Events ◽  
Dose Reduction ◽  
Research Funding ◽  
Cell Lymphoma ◽  
Phase 1 ◽  
Single Agent ◽  
Optimal Dose ◽  
T Cell Lymphoma ◽  
Grade 3

Abstract Abstract 919 Background: Pralatrexate enters cancer cells via the reduced folate carrier-1 (RFC-1) and is efficiently polyglutamated by folylpolyglutamyl synthetase (FPGS), leading to high intracellular retention. In a Phase 1/2 study of patients with hematologic malignancies, pralatrexate demonstrated activity in aggressive T-cell lymphoma with a maximum tolerated dose (MTD) of 30 mg/m2 once weekly for 6 of 7 weeks. The generally indolent course of CTCL may be better treated at lower doses in a maintenance fashion if a lower incidence and severity of adverse events can be achieved while preserving activity. PDX-010 is an open-label, single-agent, multicenter, Phase 1 dose-reduction trial in patients with relapsed or refractory CTCL. The primary objective is to identify an optimal dose and schedule of pralatrexate for these patients. Methods: Eligibility included mycosis fungoides (MF), Sézary syndrome (SS), and primary cutaneous anaplastic large cell lymphoma (ALCL); with disease progression after at least 1 prior systemic therapy. The pralatrexate dose and schedule started at 30 mg/m2 by IV push on 3 of 4 weeks and subsequent cohorts received reduced doses (20, 15, 10 mg/m2) and/or schedules (3/4 or 2/3 weeks) of pralatrexate based on tolerability. All patients received supplementation with vitamin B12 1 mg intramuscularly every 8-10 weeks and folic acid 1 mg orally once daily. As we sought a well tolerated regimen the definition of DLTs to trigger dose reduction included toxicities such as grade ≥ 3 neutropenia, grade ≥ 2 thrombocytopenia, febrile neutropenia, grade ≥ 2 mucositis/stomatitis, and any toxicity leading to dose omission or reduction in cycle 1. If DLT occurred and a response was seen, the following cohort was opened at the next lower dose or next less frequent schedule. Response was evaluated by modified severity-weighted adjustment tool (SWAT) every 2 cycles for 6 months and then every 4 cycles. For patients with lymph node involvement, scans were completed at baseline and upon clinical response or end of treatment, whichever occurred first. Results: Thirty-one patients received pralatrexate, with 18 (58%) men and median age of 57 yrs (range, 30-81). Patients had received a median of 6 prior therapies (range, 1-25). Cohorts at the following doses/schedules were enrolled: 30 mg/m2 x 3/4 weeks (n=2), 20 mg/m2 x 3/4 weeks (n=3), 20 mg/m2 x 2/3 weeks (n=7), 15 mg/m2 x 3/4 weeks (n=6), 15 mg/m2 x 2/3 weeks (n=3), and 10 mg/m2 x 3/4 weeks (n=10). Patients received pralatrexate for a median of 72 days (range, 7-491+); 4 patients received >10 cycles of treatment. The most common treatment-related adverse events (all grades) were mucositis (18 patients [58%]), nausea (14 patients [45%]), fatigue (14 patients [45%]), pyrexia (7 patients [23%]), vomiting (6 patients [19%]), anemia (6 patients [19%]), and edema (5 patients [16%]). Grade 3-4 treatment-related toxicities in >1 patient each were mucositis (4 patients [13%]) and anemia (2 patients [6%]). Mucositis was dose limiting (≥ grade 2) in 8 patients (26%). A total of 11 responses were observed, including 2 complete responses and 9 partial responses. In the 18 patients who received pralatrexate at a dose intensity of 15 mg/m2 x 3/4 weeks or greater, the objective response rate was 56% (10/18 patients). This appeared to be the threshold dose for substantial activity in CTCL, below which the incidence of responses decreased in this dose de-escalation trial. Conclusion: Pralatrexate shows impressive activity in the treatment of relapsed CTCL. The optimal dose and schedule that provided activity with tolerability for CTCL was determined to be pralatrexate 15 mg/m2 weekly on 3 of 4 weeks. This cohort is being expanded to better assess efficacy and durability. Disclosures: Horwitz: Allos Therapeutics, Inc: Consultancy, Research Funding. Duvic:Allos Therapeutics, Inc.: Research Funding. Lechowicz:Allos Therapeutics, Inc.: Consultancy. Fruchtman:Allos Therapeutics, Inc.: Employment.

Clinical Safety and Activity in a Phase 1 Trial of IPI-145, a Potent Inhibitor of Phosphoinositide-3-Kinase-δ,γ, in Patients with Advanced Hematologic Malignancies

Blood ◽  
2012 ◽  
Vol 120 (21) ◽  
pp. 3663-3663 ◽  
Author(s):  
Ian W. Flinn ◽  
Steven M. Horwitz ◽  
Manish Patel ◽  
Anas Younes ◽  
James R. Porter ◽  
...  
Keyword(s):  
T Cell ◽  
Dose Escalation ◽  
Research Funding ◽  
Cell Lymphoma ◽  
Phase 1 ◽  
Hematologic Malignancies ◽  
Lymphocytic Leukemia ◽  
Grade 3 ◽  
Expansion Cohort ◽  
Dose Levels

Abstract Abstract 3663 Introduction: Phosphoinositide-3-kinases (PI3Ks) play pivotal roles in cell signaling and regulate a variety of cellular functions relevant to oncogenesis. Impaired development and function of B and T lymphocytes has been demonstrated in PI3K-δ and PI3K-γ isoform knockout mice, supporting the development of PI3K-δ,γ specific inhibitors for B- and T-cell lymphoid malignancies. IPI-145 is a potent PI3K-δ,γ inhibitor in clinical development for patients (pts) with hematologic malignancies. The activity of IPI-145 via PI3K-δ and PI3K-γ isoform inhibition has been characterized in biochemical and cellular assays and demonstrated in preclinical models of B- and T-cell mediated disease. Early results of the Phase 1 study in pts with advanced hematologic malignancies are reported here. Methods and Patients: This Phase 1 dose-escalation study is designed to evaluate the safety, pharmacokinetics (PK) and activity of orally administered IPI-145 in pts with advanced hematologic malignancies, including T-cell lymphomas/leukemias. Sequential cohorts of pts are enrolled at progressively higher dose levels with expansion cohorts of pts with select hematologic malignancies. IPI-145 is administered orally 2 times per day (BID) continuously in 28-day cycles. Tumor response is evaluated based on disease-specific standard criteria. Results: As of 16 July 2012, the study had enrolled 20 pts; 5 pts with chronic lymphocytic leukemia (CLL)/small lymphocytic leukemia (SLL), 4 with indolent non-Hodgkin's lymphoma (iNHL), 3 with aggressive B-cell NHL [including diffuse large B-cell lymphoma (DLBCL) n=2 and Richter's transformation n=1], 3 with multiple myeloma (MM), 2 with Hodgkin's lymphoma (HL), 2 with T-cell lymphoma [anaplastic large-cell lymphoma (ALCL) n=2] and 1 with mantle cell lymphoma (MCL). Of these pts, 11 are male and 9 female, with a median [range] age of 63 years [30–81], with 36% <6 month from most recent prior systemic therapy. The median [range] number of prior therapies was 3 [1–8]. IPI-145 doses administered include 8 mg BID (n=1), 15 mg BID (n=6), 25 mg BID (n=7), 35 mg BID (n=3), and 50 mg BID (n=3). The median [range] number of treatment cycles was 2 [1–8], with 12 (60%) pts continuing on treatment. Adverse events (AEs) have occurred in 13 (65%) pts, including 7 (35%) pts with AEs Grade ≥3. Treatment-related AEs occurred in 11 pts (55%) with Grade ≥3 occurring in 5 pts (25%). Grade 4 neutropenia was the one dose limiting toxicity observed to date (15 mg dose cohort). New Grade ≥3 hematological laboratory abnormalities included neutropenia [n= 6 (30%)] and thrombocytopenia [n= 1 (5%)]. Grade 3 ALT/AST elevations occurred in 1 (5%) MM pt with onset 6 weeks after IPI-145 initiation. Preliminary PK show dose-proportional increases in plasma Cmax and AUC over the dose range studied. Further, the PK and initial pharmacodynamic (PD) data from the first 3 cohorts (8–25 mg BID) predict continuous suppression of the PI3K-δ pathway with increasing inhibition of the PI3K-γ pathway with a 25 mg BID dose or greater. In the evaluable pts (n=11), responses were observed at the 8, 15, and 25 mg BID dose levels including 2/3 CLL/SLL pts (0 CR/2 PR/1 SD), 1/2 iNHL pts (1 CR/0 PR/1 SD), and 1/1 in MCL (1 PR). No responses have been observed to date in evaluable pts with MM (0/3) or aggressive NHL (0/2). All pts with at least SD after 2 cycles (n=6) remain on treatment including the first pt dosed. Based on the PK/PD and the preliminary activity observed in pts with CLL, iNHL and MCL, an expansion cohort is enrolling pts in these select hematologic diseases dosed at 25 mg BID to further evaluate the safety and preliminary activity of IPI-145. Dose escalation continues with a focus on pts with T-cell malignancies and DLBCL where increasing suppression of the PI3K-γ isoform may improve the efficacy profile. Additional expansion cohorts in T-cell lymphoma, DLBCL, myeloproliferative neoplasms and the acute leukemias will better define disease specific activity. Conclusions: IPI-145, an oral, potent PI3K-δ,γ inhibitor, appears to be well tolerated and has shown initial clinical activity in pts with iNHL, MCL, and CLL. A dose of 25 mg BID effectively inhibits PI3K-δ, providing a rationale for expansion in CLL/iNHL/MCL. Additional safety and efficacy data from the ongoing dose escalation evaluation in T-cell/aggressive NHL and the CLL/iNHL/MCL expansion cohort will be presented. Disclosures: Flinn: Infinity Pharmaceuticals, Inc.: Research Funding. Horwitz:Seattle Genetics: Consultancy, Research Funding; Allos: Consultancy, Research Funding; Celgene: Consultancy, Research Funding; Bristol-Myers Squibb: Consultancy; Genzyme: Consultancy; Kyowa Hakko Kirin Pharma: Consultancy; Johnson & Johnson: Consultancy; Infinity Pharmaceuticals, Inc. : Research Funding. Patel:Infinity Pharmaceuticals, Inc. : Research Funding. Younes:Novartis: Honoraria, Research Funding; Celgene: Honoraria; Seattle Genetics: Honoraria, Research Funding; Sanofi-Aventis: Honoraria, Research Funding; MIllenium: Honoraria; Incyte: Honoraria; Genentech: Research Funding; Infinity Pharmaceuticals, Inc. : Research Funding; Gilead: Research Funding. Porter:Infinity Pharmaceuticals, Inc. : Employment. Sweeney:Infinity Pharmaceuticals, Inc. : Employment. Allen:Infinity Pharmaceuticals, Inc. : Employment. Kelly:Infinity Pharmaceuticals, Inc. : Employment. Kahl:Infinity Pharmaceuticals, Inc. : Research Funding.

Safe and Effective Treatment of Patients with Peripheral T-Cell Lymphoma (PTCL) with the Novel HDAC Inhibitor, Belinostat, in Combination with CHOP: Results of the Bel-CHOP Phase 1 Trial

Blood ◽  
2015 ◽  
Vol 126 (23) ◽  
pp. 253-253 ◽  
Author(s):  
Patrick B. Johnston ◽  
Amanda F. Cashen ◽  
Petros G. Nikolinakos ◽  
Anne W Beaven ◽  
Stefan Klaus Barta ◽  
...  
Keyword(s):  
T Cell ◽  
Response Rate ◽  
Cell Lymphoma ◽  
Large Cell ◽  
T Cell Lymphoma ◽  
Peripheral T Cell Lymphoma ◽  
Anaplastic Lymphoma ◽  
Not Otherwise Specified ◽  
Baseline Characteristics ◽  
Grade 3

Abstract Background: Peripheral T-cell lymphoma (PTCL) is a heterogeneous group of non-Hodgkin lymphomas associated with poor prognosis and repeated recurrence for most subtypes. Currently, anthracycline-based therapies such as cyclophosphamide, doxorubicin, vincristine and prednisone (CHOP) or CHOP-like therapies are recommended as the first-line treatment for PTCL, but the prognosis remains poor with most patients relapsing within 5 years. Thus, improved treatment strategies are still needed. Belinostat is a potent, pan-histone deacetylase inhibitor that was recently approved in the United States for the treatment of patients with relapsed or refractory PTCL (R/R PTCL). Approval was based on results from the pivotal Phase 2 BELIEF study (O'Connor et al, JCO, 2015) of belinostat in R/R PTCL, which demonstrated durable clinical benefit (objective response rate [ORR] 25.8%) and tolerability. Since belinostat (Bel) and each of the components of the CHOP regimen target different aspects of the cell cycle with different mechanisms of action, there is potential for a synergistic effect of a Bel-CHOP combination treatment regimen for patients with PTCL. Methods: Patients with PTCL received CHOP in association with 1000 mg/m2 of belinostat on various schedules, repeated every 21-days for up to 6 cycles. The cohort schema followed a traditional "3+3" dose escalation design. The objective of Part A of the study was to determine the Maximum Tolerated Dose (MTD) of the Bel-CHOP combination. Once the MTD was determined, at least 10 more patients were to be treated in the Expansion Phase (Part B). Belinostat was to be administered as a 1000 mg/m2 IV infusion once daily for up to 5 days, depending on the assigned cohort (Fig 1). The starting cohort was Cohort 3 (CHOP + 1000 mg/m2 of daily belinostat on Days 1-3). Patients received primary prophylaxis with growth factor (G-CSF) support. Dose-limiting toxicities (DLT) were considered during the 1st cycle and included: non-hematological toxicity Grades 3-4, platelet count &lt; 25 X 109/L at any time or ANC &lt; 0.5 X 109/L lasting more than 7 days despite G-CSF administration. The primary endpoint of the study was the determination of the MTD of the Bel-CHOP combination. Secondary endpoints included safety, tolerability and ORR (complete response [CR] + partial response [PR]) and pharmacokinetics. Results: A total of 23 patients were enrolled in the study, 11 of which were treated in Part A. One patient in Part A was deemed inevaluable because the patient died due to disease progression before completing Cycle 1. The MTD was determined to be 1000 mg/m2 on Days 1-5 (Cohort 5); 12 more patients were then treated at this dose level (Part B). The only DLT experienced in the study was in Cohort 3 (Grade 3 Nausea and Vomiting). At the time of this abstract, 18/23 patients (78%) have completed all 6 cycles of Bel-CHOP, with 87% completing at least 4 cycles. Ten patients (43%) had at least one serious adverse event (SAE) and 18 (78%) had at least one Grade 3 or 4 adverse event (AE). The most frequent Grade 3/4 AEs were hematological in nature: neutrophil count decreased (26%), anemia (22%), neutropenia (17%) and white blood cell count decreased (17%). The ORR for the18 patients that have completed an End of Study Visit is 89% (16/18), with the vast majority achieving a CR [72% (n=13)], and 17% (n=3) a PR. Progressive disease was reported in 2 patients. Conclusions: These results demonstrate that the combination of belinostat with CHOP (Bel-CHOP) is well tolerated, with all components of CHOP and belinostat being given at their standard therapeutic doses. The rates of AEs were consistent with those typically reported with CHOP alone, and clinical activity was demonstrated with a response rate of 89% based on 18 evaluable patients. Thus, Bel-CHOP is a promising new regimen in PTCL that will be further tested in a Phase 3 randomized trial. Table. Table. Figure 1. Summary of Demographic and Baseline Characteristics AITL= angioimmunoblastic T-cell lymphoma; ALCL =anaplastic large-cell lymphoma; ALK = anaplastic lymphoma kinase; NOS = not otherwise specified Figure 1. Summary of Demographic and Baseline Characteristics. / AITL= angioimmunoblastic T-cell lymphoma; ALCL =anaplastic large-cell lymphoma; ALK = anaplastic lymphoma kinase; NOS = not otherwise specified Disclosures Barta: Seattle Genetics: Research Funding. Bhat:Spectrum Pharmaceuticals, Inc: Employment. Song:Spectrum Pharmaceutical, Inc: Employment. Choi:Apectrum Pharmaceuticals, Inc: Employment. Allen:Spectrum Pharmaceuticals, Inc: Employment. Foss:Spectrum Pharmaceuticals; Celgene: Seattle Genetics: Infinity; Millenium: Consultancy, Honoraria, Research Funding, Speakers Bureau.

Phase 1 dose escalation study of MEDI-565, a bispecific T-cell engager that targets human carcinoembryonic antigen (CEA), in patients with advanced gastrointestinal (GI) adenocarcinomas.

2016 ◽  
Vol 34 (4_suppl) ◽  
pp. 320-320
Author(s):  
Michael J. Pishvaian ◽  
Michael Morse ◽  
Jennifer T. McDevitt ◽  
Song Ren ◽  
Gabriel Robbie ◽  
...  
Keyword(s):  
T Cell ◽  
Antitumor Activity ◽  
Dose Escalation ◽  
Half Life ◽  
High Titer ◽  
Phase 1 ◽  
Single Chain ◽  
Dose Escalation Study ◽  
Human T Cell ◽  
Grade 3

320 Background: MEDI-565, a bispecific single-chain antibody, targets human CEA on tumor cells and the CD3 epsilon subunit of the human T-cell receptor complex. In murine models, MEDI-565 showed antitumor activity in CEA-expressing tumors (J Immunother 2009;34:341-52). Methods: This phase 1, multicenter, open-label, dose-escalation study enrolled adults with GI adenocarcinomas (including esophageal, gastric, small intestine, colorectal, biliary tract, and pancreatic). MEDI-565 was given intravenously over 3 h on days 1–5 in 28-day cycles, with 4 single-patient (pt) (0.75–20 μg) and 5 standard 3+3 escalation (60 μg–3 mg; 1.5–7.5 mg with dexamethasone [dex]) cohorts. Primary objective was to determine the maximum tolerated dose (MTD); secondary objectives were to evaluate pharmacokinetics (PK), antidrug antibody (ADA), and antitumor activity. Results: Study enrolled39 pts: mean age 59 y; 56% male; 28 (72%) colorectal, 6 (15%) pancreatic, 5 (13%) other. Dose-limiting toxicities (grade ≥ 3 nonhematologic) were seen in 4 pts (2 at 3-mg; 2 at 7.5-mg + dex): hypoxia (n = 2), diarrhea, and cytokine release syndrome (CRS). Grade 3 treatment-related adverse events (AEs) seen in 5 pts: diarrhea, CRS, increased alanine aminotransferase, hypertension (all n = 1), and hypoxia (n = 2). Treatment-related serious AEs seen in 6 pts: diarrhea, vomiting, pyrexia, CRS (all n = 1), and hypoxia (n = 2). Five pts discontinued treatment due to AEs: diarrhea, CRS, central nervous system metastases, and hypoxia (n = 2). MEDI-565 exposures increased in approximately dose-proportional manner, with clearance (35–77 L/d) and half-life (2–7 h) typical of drug class. ADA had minor impact; 19 pts (48.7%) had ADAs, 5/39 (12.8%) with high titer, with decreased MEDI-565 concentrations in 2 pts. Plasma inflammatory cytokines were elevated posttreatment in several pts at 1.5- and 3-mg (no dex) dose levels. No objective responses were observed; 11 (28%) pts had stable disease as best response. Conclusions: The MTD of MEDI-565 in pts with GI adenocarcinomas was 5 mg with dex. PK was linear, with fast clearance and short half-life. No objective responses were observed. Clinical trial information: NCT01284231.

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