Dexamethasone, Carfilzomib, & Nivolumab With Pelareorep for Relapsed/Refractory Multiple Myeloma

This phase I trial studies the side effects and best dose of wild-type reovirus (pelareorep) when given together with dexamethasone, carfilzomib, and nivolumab in treating patients with multiple myeloma that has come back (relapsed). Drugs used in chemotherapy, such as dexamethasone, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Carfilzomib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Immunotherapy with monoclonal antibodies, such as nivolumab, may help the body's immune system attack the cancer and may interfere with the ability of tumor cells to grow and spread. A virus, called pelareorep, which has been changed in a certain way, may be able to kill tumor cells without damaging normal cells. Giving dexamethasone, carfilzomib, and nivolumab with pelareorep may work better in treating patients with multiple myeloma.