Testing the Addition of KRT-232 (AMG 232) to Usual Chemotherapy for Relapsed Multiple Myeloma

Summary

Participation Requirements

Description

PRIMARY OBJECTIVES: I. Evaluate safety and tolerability of MDM2 Inhibitor KRT-232 (KRT-232 [AMG 232]) in combination with carfilzomib, lenalidomide, and dexamethasone (KRd). (Part A) II. Determine the maximum tolerated dose (MTD) and recommended phase 2 dose (RP2D) of KRT-232 (AMG 232) in combinatio...

PRIMARY OBJECTIVES: I. Evaluate safety and tolerability of MDM2 Inhibitor KRT-232 (KRT-232 [AMG 232]) in combination with carfilzomib, lenalidomide, and dexamethasone (KRd). (Part A) II. Determine the maximum tolerated dose (MTD) and recommended phase 2 dose (RP2D) of KRT-232 (AMG 232) in combination with carfilzomib, lenalidomide, and dexamethasone (KRd). (Part A) III. Confirm the safety and tolerability of KRT-232 (AMG 232) in combination with carfilzomib, lenalidomide, and dexamethasone (KRd) at MTD/tentative RP2D in a goal of 10 subjects with relapsed and/or refractory myeloma. (Part B) SECONDARY OBJECTIVES: I. Evaluate progressive disease (PD) effects of KRT-232 (AMG 232) through serum MIC-1 levels. (Part A) II. Assess KRT-232 (AMG 232) exposure-response relationships (PD, toxicity, and efficacy). (Part A) III. Evaluate the overall response rate of KRT-232 (AMG 232) in combination with carfilzomib, lenalidomide, and dexamethasone (KRd) in relapsed/refractory myeloma by International Myeloma Working Group (IMWG) criteria. (Part B) IV. Evaluate PD effects of KRT-232 (AMG 232) through serum MIC-1 levels. (Part B) V. Assess KRT-232 (AMG 232) exposure-response relationships (PD, toxicity, and efficacy). (Part B) EXPLORATORY OBJECTIVES: I. To observe and record anti-tumor activity of KRT-232 (AMG 232) in combination with carfilzomib, lenalidomide, and dexamethasone (KRd) in relapsed/refractory myeloma by International Myeloma Working Group (IMWG) criteria. (Part A) II. Evaluate ribonucleic acid (RNA) expression levels of relevant genes in the TP53 pathway that may predict response to therapy using pre- and post-treatment bone marrow biopsies. (Parts A and B) OUTLINE: This is a dose-escalation study of MDM2 Inhibitor KRT-232. Patients receive MDM2 Inhibitor KRT-232 orally (PO) once daily (QD) on days 1-7, carfilzomib intravenously (IV) over 10-30 minutes on days 1-2, 8-9, and 15-16 of cycles 1-12 and on days 1-2 and 15-16 of cycles 13-18, lenalidomide PO on days 1-21, and dexamethasone PO or dexamethasone sodium phosphate IV on days 1, 8, 15, and 22. Cycles repeat every 28 days in the absence of disease progression or unexpected toxicity. After completion of study treatment, patients are followed up for 30 days.

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