First-in-human, Open-label Phase 1/2 Study to Investigate Safety and Efficacy of SAR445514, an NKcell Engager (NKCE) Targeting B-cell Maturation Antigen (BCMA) in Monotherapy in Participants With Relapsed/Refractory Multiple Myeloma (RRMM) and in Relapsed/Refractory Light-chain Amyloidosis (RRLCA)
This is a first-in-human (FIH) Phase 1/Phase 2 study for evaluating SAR445514 in monotherapy in participants with relapsed/refractory multiple myeloma (RRMM) and relapsed/refractory light chain amyloidosis (RRLCA). The study will comprise 3 parts: A dose escalation phase (Part 1) in RRMM participants (Part 1a) that will evaluate several doses administered to determine 2 doses that will be tested in the dose optimization part. A dose escalation will also be done in RRLCA participants (Part 1b) but started sequentially after the end of the dose escalation in RRMM participants. This dose escalation will evaluate the 2 doses planned to be used in dose optimization in RRMM, to ensure those doses are safe also for RRLCA participants. A dose optimization phase (Part 2) that will be evaluating 2 doses determined from Part 1 to determine the preliminary recommended Phase 2 dose (pRP2D) and schedule for SAR445514 in RRMM. A dose expansion phase (Part 3) that will evaluate the preliminary efficacy of the confirmed recommended Phase 2 dose (cRP2D) and schedule for SAR445514 in RRMM (Part 3a) and RRLCA (Part 3b). Approximately 101 participants will be enrolled and treated by study intervention and separated as such: Part 1a: Approximately 18 to 30 participants Part 1b: Approximately 6 to 12 participants Part 2: Approximately 30 participants Part 3a: Approximately 15 participants Part 3b: Approximately 14 participants
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