Dr. Weiner's research focuses on understanding the mechanisms of action of anti-cancer monoclonal antibodies, and on development of novel approaches to immunotherapy of lymphoma. He has been continually funded by the NCI since 1991 and has been the PI on the University of Iowa / Mayo Clinic Lymphoma Specialized Program of Research Excellence (P50 CA097274) since it was initiated in 2002. He has made major contributions to our understanding of the mechanisms of action responsible for the anti-tumor activity of monoclonal antibodies, including providing evidence that, in some cases, complement can inhibit the efficacy of some monoclonal antibodies.