MARTINSRIED/MUNICH, Germany & PRINCETON, N.J.--(BUSINESS WIRE)--GPC Biotech AG (Frankfurt Stock Exchange: GPC, NASDAQ: GPCB) today announced the initiation of a Phase 2 study evaluating satraplatin in combination with the steroid, prednisone, in patients with metastatic hormone-refractory prostate cancer (HRPC) who previously have been treated with docetaxel (Taxotere®). The study is being sponsored by the U.S. National Cancer Institute (NCI), and the principal investigator is William L. Dahut, MD, Chief, Genitourinary Research Section, Medical Oncology Branch, Center for Cancer Research, NCI.