Recombinant Human IL-7 (NT-I7) in Relapsed/Refractory Multiple Myeloma Following BCMA CAR-T Therapy (Cilta-cel)

CAR-T cell therapy is an emerging treatment modality in relapsed and refractory multiple myeloma (MM). CAR-T therapy in MM relies on directing autologous T-cells to detect and clear myeloma cells expressing B-cell Maturation Antigen (BCMA). While BCMA CAR-T cell-treated patients achieve an excellent overall response rate, their response is often not durable. NT-I7 promotes CAR-T cell expansion and efficacy in pre-clinical lymphoma models. In patients receiving CD19-directed CAR-T therapy for lymphoma, NT-I7 augmented CAR-T expansion while being safe and tolerable. The impact of NT-I7 on BCMA CAR-T cells in multiple myeloma is unknown. This is a two-arm, double blind, placebo-controlled, randomized, single-site phase Ib study testing the safety and toxicity of adding NT-I7 to BCMA CAR-T therapy in patients with relapsed and refractory multiple myeloma. The hypothesis is that NT-I7 will promote CAR-T expansion and persistence which will enhance clearance of MM, while maintaining a favorable safety and toxicity profile. Patients receiving standard of care BCMA CAR-T (Cilta-cel) will be randomized to either NT-I7 or placebo. Correlative studies will evaluate CAR-T cell expansion, persistence, immune-phenotype, function and correlate with clinical outcomes.