Polatuzumab Vedotin, Venetoclax, and Rituximab and Hyaluronidase Human for the Treatment of Relapsed or Refractory Mantle Cell Lymphoma

This phase II trial studies the effect of polatuzumab vedotin, venetoclax, and rituximab and hyaluronidase human in treating patients with mantle cell lymphoma that has come back (relapsed) or does not respond to treatment (refractory). Polatuzumab vedotin is a monoclonal antibody, polatuzumab, linked to a toxic agent called vedotin. Polatuzumab attaches to CD79B positive cancer cells in a targeted way and delivers vedotin to kill them. Venetoclax may stop the growth of cancer cells by blocking Bcl-2, a protein needed for cell growth. Rituximab hyaluronidase is a combination of rituximab and hyaluronidase. Rituximab binds to a molecule called CD20, which is found on B cells (a type of white blood cell) and some types of cancer cells. This may help the immune system kill cancer cells. Hyaluronidase allows rituximab to be given by injection under the skin. Giving rituximab and hyaluronidase by injection under the skin is faster than giving rituximab alone by infusion into the blood. Giving polatuzumab vedotin, venetoclax, and rituximab and hyaluronidase human may work better than standard therapy in treating patients with mantle cell lymphoma.