Autore	Discussione
Franco da Genova	Inserito il 24/07/2005
	Provenge A chi interessa. Provenge non è un chemioterapico, teniamolo ben presente, Franco da Genova. Dendreon's Second Randomized Phase 3 Trial Shows Provenge Extends Survival in Patients With Advanced Prostate Cancer SEATTLE, WA -- July 21, 2005 -- Dendreon Corporation today announced that the analysis of the final three-year survival data of its second Phase 3 study (D9902A) of Provenge(R), the Company's investigational active immunotherapy for the treatment of prostate cancer, showed a survival benefit in men with advanced prostate cancer who were treated with Provenge. Prostate cancer is the most commonly diagnosed non-skin cancer in the United States and the third most common cancer worldwide. In the D9902A study, the three-year final survival analysis in the intent-to-treat population of the double-blind, placebo-controlled study of Provenge in 98 men with asymptomatic, metastatic, androgen-independent (hormone-refractory) prostate cancer showed a 20% improvement in median survival for patients who were randomized to receive Provenge compared to placebo. In addition, at the three-year final follow up, the percentage of patients alive in the Provenge-treated group was substantially greater than the percentage of patients alive who received placebo. As expected, the results from this study did not meet the criteria for statistical significance based on a log rank test. A secondary analysis using a Cox multivariate regression analysis of overall survival, which adjusts for prognostic factors known to influence survival, met the criteria for statistical significance. The hazard ratio observed in this analysis was similar to that seen in the Company's first Phase 3 study (D9901). As reported earlier this year, the final three-year follow up of the D9901 study of Provenge in 127 men with asymptomatic, metastatic, androgen-independent prostate cancer showed a median survival benefit of 21% or 4.5 months and a three-fold improvement in survival at 36 months (P =.01; hazard ratio = 1.7). This hazard ratio implies that patients who received placebo have a 70% greater relative risk of dying than patients who received Provenge. A supplemental analysis that examined pooled survival data from the two companion Phase 3 clinical studies (D9901 and D9902A) showed a statistically significant survival benefit in the overall intent-to-treat population of 225 patients. In this analysis, a 23% increase in median survival was seen in patients randomized to receive Provenge compared to placebo. In addition, at the three-year final follow up, the percentage of patients alive in the Provenge-treated group was substantially greater than the percentage of patients alive who received placebo. In the combined D9901 and D9902A analysis, a Cox multivariate regression analysis of overall survival also met the criteria for statistical significance. Further analyses of the data are ongoing and will be submitted for presentation at an upcoming medical meeting. As in previous studies, Provenge was well tolerated with the most common adverse events reported being fever and chills lasting for one to two days. "We believe the data from this second study support what we saw in the first Phase 3 trial -- that Provenge prolongs survival in men with advanced prostate cancer," said Mitchell H. Gold, M.D., Dendreon's president and chief executive officer. "We plan to share all of the data collected to date from our clinical studies of Provenge with the FDA to determine the most efficient pathway for bringing Provenge to market." "The results of this trial support our understanding of the potential utility of Provenge in the treatment of patients with advanced prostate cancer," said Celestia Higano, MD, director and associate professor of the GU oncology clinical research group at the University of Washington, Seattle and a principal investigator in the D9902A study. "The survival benefit observed in these studies combined with a favorable safety profile holds promise for the many prostate cancer patients who have few appealing treatment options available to them." More than one million men in the United States have prostate cancer, with an estimated 220,000 new cases of prostate cancer diagnosed each year. More than 30,000 men die each year from the disease. Study Details The study, known as D9902A, is a double-blind, placebo-controlled Phase 3 trial designed to evaluate Provenge in men with asymptomatic, metastatic, androgen-independent prostate cancer. D9902A was originally designed to be the companion study to Dendreon's completed first Phase 3 study D9901. The D9902A study was stopped in 2002 after 98 patients were enrolled when the analysis of D9901 showed that no statistically significant benefit in time to disease progression had been observed in the overall group, but that a benefit was seen in the subgroup of patients with Gleason scores of seven and less. In January 2005, the Company announced that the primary endpoint of time to disease progression in D9902A did not show a statistically significant delay in the overall group or in the Gleason score subgroups. Three-year follow up of patients for survival was the secondary endpoint of the D9902A study. About Provenge Provenge is designed to stimulate a patient's immune system against prostate cancer. It is developed through Dendreon's proprietary Antigen Delivery Cassette(TM) technology, which utilizes a recombinant form of an antigen found in 95% of prostate cancers, prostatic acid phosphatase (PAP). Provenge is being further evaluated in an ongoing Phase 3 study in asymptomatic, metastatic, androgen-independent prostate cancer (D9902B). It is also being evaluated in a Phase 3 trial, known as PROTECT or P-11, in men with early stage prostate cancer. SOURCE: Dendreon Corporation
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