SOUTH SAN FRANCISCO, Calif., April 03, 2007 /PRNewswire-FirstCall/ -- Cell Genesys, Inc. today announced final, updated results from its second multi-center Phase 2 trial of GVAX immunotherapy for prostate cancer which evaluated escalating doses of the immunotherapy in 80 patients with metastatic hormone-refractory prostate cancer (HRPC). Additional follow-up of the 22 patients who received the dose that is comparable to that being employed in the company's ongoing Phase 3 program indicates that the median survival is 35.0 months. Four patients have withdrawn consent to further follow-up and thus were censored in the analysis. The company previously reported final median survival results from its first multi-center Phase 2 trial of GVAX immunotherapy for prostate cancer in 34 patients with metastatic HRPC that showed an overall median survival of 26.2 months. The survival results from the two, independent multi-center Phase 2 clinical trials compare favorably to the previously published median survival of 18.9 months for metastatic hormone-refractory prostate cancer patients treated with Taxotere(R) (docetaxel) chemotherapy plus prednisone, the current standard of care for these patients. The company's ongoing Phase 3 program is designed to confirm this potential survival benefit for GVAX immunotherapy for prostate cancer.
"We are certainly encouraged by the survival data from the second Phase 2 trial of GVAX immunotherapy for prostate cancer. The final median survival of 35.0 months also compares favorably to a predicted median survival of 22.0 months for these 22 patients based on a validated, published nomogram using seven prognostic variables," stated Rob Dow, M.D., chief medical officer of Cell Genesys. "We continue to hope that GVAX immunotherapy for prostate cancer may some day offer a new treatment option for patients with this disease."
GVAX immunotherapy for prostate cancer is currently