CAR-T Re-treatment for Refractory/Relapsed Multiple Myeloma

Patients will undergo leukapheresis to isolate peripheral blood mononuclear cells (PBMCs) or use their mononuclear cells that preserved in the laboratory for the production of CAR-T cells. After a pre-treatment lymphodepletion therapy, patients will receive the re-treatment of CAR-T therapy by intravenous injection.