CAMBRIDGE, Mass.--(BUSINESS WIRE)--Jan. 31, 2006--ImmunoGen, Inc. (Nasdaq: IMGN), a biopharmaceuticals company that develops targeted anticancer therapeutics using its Tumor-Activated Prodrug (TAP) technology, today announced that the Company has been informed by Genentech (NYSE: DNA) that the trastuzumab-DM1 Investigational New Drug (IND) application submitted by Genentech to the U.S. Food and Drug Administration (FDA) has become effective. This event triggers a $2 million milestone payment to ImmunoGen. Trastuzumab-DM1 comprises ImmunoGen’s cell-killing agent, DM1, linked to Genentech’s therapeutic antibody, trastuzumab, which targets overexpression of the HER2 protein.
