BOSTON--(BUSINESS WIRE)--Exelixis, Inc. (Nasdaq:EXEL) today reported interim data from an ongoing phase 1 dose-escalation trial of XL147 (SAR245408) in combination with the EGFR inhibitor erlotinib in patients with advanced solid tumors. XL147 is a selective, orally available small molecule inhibitor of phosphoinositide-3-kinase (PI3K). 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 epidermal growth factor receptor (EGFR) inhibitors. Neil Faulkner, MD from the Karmanos Cancer Institute, Wayne State University, Detroit, MI, an investigator on the phase 1 trial, will present the data in a poster session (Abstract #C197) beginning at 12:30 pm, local time, on Wednesday, November 18, 2009, at the AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics, which is being held November 15-19 in Boston. XL147 is being developed with sanofi-aventis.
