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This study examines the safety and activity of the drugs RO6870810 and Venetoclax, combined with or without Rituximab, in patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) or high-grade B-cell lymphoma. It was designed for patients whose disease persisted despite at least one course of chemotherapy and who were not eligible for stem cell transplantation. The study was conducted in Phase 1 and has been completed.
The summary above is a plain-language rendering of the official record. The original English title is shown for reference.
Criteria are reproduced from the ClinicalTrials.gov record in the original English. Only the trial team can determine eligibility.
Inclusion Criteria * Cooperative Oncology Group (ECOG) Performance Status of 0, 1, or 2. * Life expectancy \>3 months as per investigator's assessment. * Part 1 and Part 2 Group 1: Participantts with diffuse large B-cell lymphoma (DLBCL) relapsed or refractory to ≥ 1 course of chemotherapy including an anti-CD20 monoclonal antibody, and not eligible for autologous stem cell transplantation (ASCT) (including due to chemorefractory disease). Participants with transformed FL are eligible, provided DLBCL or HGBL-DH/TH histology is biopsy-confirmed prior to study entry and a treatment regimen as described above has been administered. The Sponsor retains the option to limit the number of participants enrolled with transformed FL. Part 2, Group 2: Patients identified with DE-DLBCL (expression MYC ≥40%, BCL2 \> 50%) and or HGBL-DH/TH, relapsed or refractory to \>= 1 course of chemotherapy including an anti-CD20 monoclonal antibody, and not eligible for ASCT (including due to chemorefractory disease). Patients with transformed follicular lymphoma (FL) are eligible, provided DE-DLBCL and/or HGBL-DH/TH histology is biopsy-confirmed prior to study entry and a treatment regimen as described above has been administered. The Sponsor retains the option to limit the number of participants enrolled with transformed FL. * Part 1 and Part 2: Willing to provide the protocol specified tumor biopsy(ies): at screening a fresh biopsy (if no archival biopsy tissue of less than 3 months prior to treatment and without intercurrent treatment is available); Part 2: Willing to provide an additional biopsy on Cycle 2 Day 15 (+ 2 days). * Acceptable liver function, as specified below: * Total bilirubin ≤ 2 times upper limit of normal (ULN). (Participants with known Gilbert's disease who has serum bilirubin ≤ 3 × ULN may be enrolled). * Aspartate transaminase (AST; SGOT), alanine transaminase (ALT; SGPT) ≤ 2.5 × ULN, (or ≤ 5 × ULN if tumor involvement (liver) is present). * Gamma-glutamyl transferase (GGT) alkaline phosphatase ≤ 2.5 × ULN. * Acceptable renal function, as specified below: • Creatinine clearance (CrCl) calculated by Cockroft-Gault formula of ≥ 60 mL/min. * Acceptable hematologic status (growth factors cannot be used within the previous 7 days), as specified below: * Absolute neutrophil count (ANC) ≥ 1000 cells/μL * Hemoglobin ≥ 9 g/dL * Platelet count ≥ 75,000 (platelets/μL) * Uncontrolled symptomatic hypercalcemia. * Acceptable coagulation status, as specified below: * Prothrombin time (PT) and partial thromboplastin time (PTT) ≤ 1.2 × ULN (unless receiving anticoagulation therapy, if receiving anticoagulation therapy, eligibility will be based upon international normalized ratio \[INR\]). * INR ≤ 1.6 (unless receiving anticoagulation therapy). * If receiving warfarin: INR ≤ 3.0 and no active bleeding (i.e., no bleeding within 14 days prior to first dose of study therapy). * Acceptable method of contraception Exclusion Criteria * Current central nervous system (CNS) lymphoma or leptomeningeal infiltration. * New York Heart Association (NYHA) Class III or IV cardiac disease, myocardial infarction, within the past 6 months, unstable arrhythmia, or known pericardial disease. * Fredericia-corrected QT interval (QTcF) \>470 msec (female) or \>450 msec (male), or history of congenital long QT syndrome. * Any electrocardiogram (ECG) abnormality, which in the opinion of the Investigator would preclude safe participation in the study. * Active, uncontrolled bacterial, viral, or fungal infections, within 7 days of study entry requiring systemic therapy. * Clinically important respiratory impairment * Grade ≥ 3 sensory or motor neuropathy. * Any Grade \>1 (according to the NCI CTCAE 4.03) adverse reaction unresolved from previous treatments and not readily managed and controlled with supportive care. * Serious non-malignant disease that could compromise protocol objectives in the opinion of the Investigator and/or the Sponsor. * History of progressive multifocal leukoencephalopathy (PML). * History of other malignancy within 2 years prior to screening, except for ductal carcinoma in situ not requiring chemotherapy, appropriately treated carcinoma in situ of the cervix, non-melanoma skin carcinoma, low-grade, localized prostate cancer (Gleason score ≤ 7) not requiring treatment or appropriately treated Stage I uterine cancer. * Completion of ASCT within 100 days prior to Day 1 of Cycle1. * Prior standard or investigational anti-cancer therapy, as specified below: * Radio-immunoconjugate 4 weeks or 5 half-lives, whichever is longer prior to Day 1 of Cycle 1. * Monoclonal antibody or antibody-drug conjugate (ADC) therapy within 3 weeks prior to Day 1 of Cycle 1. * Radiotherapy, chemotherapy, or targeted small-molecule therapy within 2 weeks prior to Day 1 of Cycle 1. * CAR T-cell therapy 30 days prior to Day 1 of Cycle 1. * History of major solid organ transplant (i.e., heart, lungs, liver and kidney). * History of an allogeneic bone marrow transplant. * Major surgical procedure within 28 days prior to Day 1 of Cycle 1. * Treatment with systemic corticosteroids ≥ 20 mg/day prednisone or equivalent, for non-lymphoma treatment reasons. For lower acceptable doses, documentation of a stable dose for at least 4 weeks prior to Day 1 of Cycle 1 is required. 18\. Treatment with strong to moderate CYP3A inhibitors or moderate CYP3A inducers within 7 days prior to the first dose of study treatment. * Treatment with strong CYP3A inducers within 14 days prior to the first dose of study treatment of RO6870810/venetoclax. * Consumption of grapefruits, grapefruit products, Seville oranges (including marmalade that contains Seville oranges), or star fruit within 3 days prior to the first dose of venetoclax. * Participants who are currently receiving any other investigational agent ((other than anti-cancer therapy as specified in exclusion criteria number 13) or have received an investigational agent within 30 days or 5 half-lives prior to Day 1 of Cycle 1, whichever is longer. * Prior treatment with small molecule bromodomain and extra terminal (BET) family inhibitor. * Known to be human immunodeficiency virus (HIV) positive. * Presence of positive test results for hepatitis B surface antigen (HBsAg) or hepatitis C antibodies (HcAb) (for participants receiving regimen including rituximab) * Pregnant or breastfeeding female. * Significant allergy to a biological pharmaceutical therapy that, in the opinion of the Investigator, poses an increased risk to the participant. * Uncontrolled cancer pain. Participants requiring pain medication must be on a stable regimen at study entry. Symptomatic lesions amenable to palliative radiotherapy should be treated prior to enrollment. * History of severe allergic or anaphylactic reaction to humanized or murine monoclonal antibodies (for participants receiving regimen including rituximab). * Known sensitivity or allergy to murine products or any component of RO6870810, venetoclax, or rituximab.