Role of investigational monoclonal antibodies in the treatment of multiple myeloma: A systematic review

e19533 Background: Immunotherapy for multiple myeloma (MM) has been of focus in recent years due to its myeloma-specific immune responses. We reviewed literature on non-FDA approved monoclonal antibodies (MoAbs) to highlight future perspectives. Methods: We searched PubMed, EMBASE, Web of Science, Cochrane and Clinicaltrilas.gov to include phase I/II clinical trials. Results: 40 studies (1917 patients) were included. Isatuximab (anti-CD38) and F50067 (anti-CXCR4) were the only MoAbs which produced encouraging results as monotherapy with ORR of 66.7% and 32% respectively. Isatuximab use in combination with Len-Dex produced CBR of 83%, and in combination with pomalidomide and dexamethasone CBR of 73%. Indatuximab Ravtansine, an antibody-drug conjugate, produced ORR 78% and 79% in combination with Len-Dex and pomalidomide + dexamethasone respectively. Conclusions: CD38 remains an important target for further clinical trials in combination therapy. Trials using indatuximab, pembrolizumab, lorvotuzumab, siltuximab, and dacetuzumab in combination therapy produced better outcomes as compared to monotherapies. [Table: see text]