Multiple Myeloma is a hematological neoplasm that, over the recent few years, has benefited from numerous therapeutic options. Among the latter, CAR-T stands out as the most recent and one of the most promising treatments currently available. Despite its recent introduction, multiple CAR-T products have already been approved, and research regarding cellular therapy is rapidly increasing. We conducted a comprehensive search and review of the available literature, including published studies and abstracts from recent meetings (ASH, ASCO, ASTCT, IMS), regarding Multiple Myeloma and CAR-T therapy. We describe the discovery and research regarding promising targets like the B-Cell Maturation Antigen (BCMA) and others, the origin and nature of CAR-T cells, and the recent introduction of anti-BCMA CAR-Ts Idecabtagene-vicleucel and Ciltacabtagene-autoleucel, which are currently the only approved CAR-T products for MM. Additionally, we discuss non-BCMA-targeting CAR-Ts and their clinical implications. Given the significant impact of cellular therapy, we provide an overview of its limitations and possible adverse implications, as well as related resistance mechanisms. Finally, we describe the current research aimed at improving CAR-T therapy in MM, including structural innovations and new therapeutic approaches, such as in the earlier lines of treatment and maintenance therapy.
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