SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Exelixis, Inc. (Nasdaq: EXEL) today reported updated interim data from three ongoing trials of XL765 (SAR245409), an orally available small molecule inhibitor of phosphoinositide-3-kinase (PI3K) and mTOR. Activation of the PI3K pathway is a frequent event in human tumors, promoting cell proliferation, survival, and resistance to chemotherapy and radiotherapy. The pathway also has been implicated as a mediator of resistance to agents targeting epidermal growth factor receptor (EGFR) family members. The presentations will be made at the 2010 Annual Meeting of the American Society of Clinical Oncology, which is being held June 4-8 in Chicago. Exelixis is developing XL765 with sanofi-aventis.
