WASHINGTON, April 19, 2010 (GLOBE NEWSWIRE) -- Immunomedics, Inc. (Nasdaq:IMMU), a biopharmaceutical company focused on developing monoclonal antibodies to treat cancer and other serious diseases, reported today at the 101st Annual Meeting of the American Association for Cancer Research (AACR) results from two studies aimed at improving the design of antibody-SN-38 conjugates for targeted cancer chemotherapy.