Donor Immune Cells (TGFbi NK Cells) and Isatuximab for the Treatment of Relapsed or Refractory Multiple Myeloma

This phase I trial tests the side effects and best dose of TGFbi natural killer (NK) cells (TiNK) when given together with isatuximab for the treatment of patients with multiple myeloma that has come back after a period of improvement (relapsed) or that has not responded to treatment (refractory). NK cells are a type of white blood cell that are known to spontaneously attack cancer cells. TiNK are NK cells made in a laboratory to have a higher response to tumor cells. A monoclonal antibody is a type of protein that can bind to certain targets in the body, such as molecules that cause the body to make an immune response (antigens). Immunotherapy with monoclonal antibodies, such as isatuximab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Patients also receive standard treatment (cyclophosphamide and dexamethasone) on this trial. Cyclophosphamide is in a class of medications called alkylating agents. It works by damaging the cell's DNA and may kill cancer cells. It may also lower the body's immune response. Dexamethasone is in a class of medications called corticosteroids. It is used to reduce inflammation and lower the body's immune response to help lessen the side effects of chemotherapy drugs. Giving TiNK and isatuximab with standard treatment may be a safe and effective treatment for relapsed or refractory multiple myeloma.