A Phase 1 Study to Assess Safety and Tolerability of REGN5837, an Anti-CD22 x Anti-CD28 Costimulatory Bispecific Monoclonal Antibody, in Combination With Odronextamab, an Anti-CD20 x Anti-CD3 Bispecific Monoclonal Antibody, in Patients With Aggressive B-Cell Non-Hodgkin Lymphomas (ATHENA-1)
This study is researching an experimental drug called REGN5837 in combination with another drug, odronextamab (called study drug\[s\]), in patients with relapsed or refractory aggressive B-cell Non-Hodgkin Lymphomas (B-NHLs). The study has 2 parts. The aim of the first part (dose escalation) is to find a safe dose of REGN5837 when given in combination with odronextamab. The goal of the second part (dose expansion) is to use the REGN5837 drug dose found in the first part to see how well REGN5837 in combination with odronextamab works. The study is looking at several other research questions, including: * What side effects may happen from taking the study drugs * How much study drug is in the blood at different times * Whether the body makes antibodies against the study drugs (that could make the drugs less effective or could lead to side effects)
• Have documented CD20+ aggressive B-NHL, with disease that has progressed after at least 2 lines of systemic therapy containing an anti-CD20 antibody and an alkylating agent, as described in the protocol.
• Measurable disease on cross sectional imaging as defined in the protocol
• Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1
• Adequate bone marrow, renal and hepatic function as defined in the protocol
• Availability of tumor tissue for submission to central laboratory is required for study enrollment. Archival tumor tissue for histological assessment prior to enrollment is allowed
• During dose expansion phase of the study, participant should be willing to undergo mandatory tumor biopsies, if in the opinion of the investigator, the participant has an accessible lesion that can be biopsied without significant risk to the participant.