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  • Title: Multicenter randomized phase II study of two schedules of docetaxel, estramustine, and prednisone versus mitoxantrone plus prednisone in patients with metastatic hormone-refractory prostate cancer.
    Author: Oudard S, Banu E, Beuzeboc P, Voog E, Dourthe LM, Hardy-Bessard AC, Linassier C, Scotté F, Banu A, Coscas Y, Guinet F, Poupon MF, Andrieu JM.
    Journal: J Clin Oncol; 2005 May 20; 23(15):3343-51. PubMed ID: 15738542.
    Abstract:
    PURPOSE: Mitoxantrone-corticosteroid is currently the standard palliative treatment in hormone-refractory prostate cancer (HRPC) patients. Recent clinical trials documented the high activity of the docetaxel-estramustine combination. We conducted a randomized phase II study to evaluate prostate-specific antigen (PSA) response (primary end point) and safety of two docetaxel-estramustine-prednisone (DEP) regimens and mitoxantrone-prednisone (MP). PATIENTS AND METHODS: One hundred thirty metastatic HRPC patients were randomly assigned to receive docetaxel (70 mg/m2 on day 2 or 35 mg/m2 on days 2 and 9 of each 21-day cycle) and estramustine (280 mg p.o. tid on days 1 through 5 and 8 through 12) or mitoxantrone 12 mg/m2 every 3 weeks; all patients received prednisone (10 mg daily). RESULTS: One hundred twenty-seven patients were assessable for PSA response and safety. A > or = 50% PSA decline was found in a greater percentage of patients in the docetaxel arms (67% and 63%) compared with MP (18%; P = .0001). Median time to PSA progression was five times longer with DEP than with MP (8.8 and 9.3 v 1.7 months, respectively; P = .000001). Overall survival was better in the docetaxel arms (18.6 and 18.4 months) compared with the MP arm (13.4 months), but not significantly so (P = .3). Crossover rates differed significantly among treatment arms (16%, 10%, and 48% in arms A, B, and C, respectively; P = .00001). Treatment-related toxicities were mild and mainly hematologic. CONCLUSION: The results of this randomized phase II study showed significantly higher PSA decline < or = 50% and longer times to progression in HRPC patients receiving DEP-based chemotherapy than MP, and that DEP could be proposed in this setting.
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