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Docetaxel plus oblimersen sodium (Bcl-2 antisense oligonucleotide): an EORTC multicenter, randomized phase II study in patients with castration-resistant prostate cancer.

Author(s): Sternberg CN, Dumez H, Van Poppel H, Skoneczna I, Sella A, Daugaard G, Gil T, Graham J, Carpentier P, Calabro F, Collette L, Lacombe D, EORTC Genitourinary Tract Cancer Group

Affiliation(s): Department of Medical Oncology, San Camillo and Forlanini Hospitals, Rome, Italy. cstern@mclink.it

Publication date & source: 2009-07, Ann Oncol., 20(7):1264-9. Epub 2009 Mar 17.

Publication type: Clinical Trial, Phase II; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't

BACKGROUND: This randomized, phase II study assessed the activity of oblimersen sodium, a Bcl-2 antisense oligonucleotide, administered before docetaxel (Taxotere) to patients with castration-resistant prostate cancer. PATIENTS AND METHODS: Chemotherapy-naive patients with prostate-specific antigen (PSA) progression and testosterone < or = 0.5 ng/ml received docetaxel 75 mg/m2 on day 1 or oblimersen 7 mg/kg/day continuous i.v. infusion on days 1-7 with docetaxel 75 mg/m2 on day 5 every 3 weeks for < or = 12 cycles. Primary end points were confirmed PSA response (Bubley criteria) and major toxic events. RESULTS: Confirmed PSA response was observed in 46% and 37% of 57 and 54 patients treated with docetaxel and docetaxel-oblimersen, respectively. Partial response (RECIST) was achieved in 18% and 24%, respectively. Oblimersen added to docetaxel was associated with an increase in the incidence of grade > or = 3 fatigue, mucositis, and thrombocytopenia. Major toxic events were reported in 22.8% and 40.7% of patients with docetaxel and docetaxel-oblimersen, respectively. CONCLUSIONS: The primary end points of the study were not met: a rate of confirmed PSA response >30% and a major toxic event rate <45% were not observed with docetaxel-oblimersen.

Page last updated: 2009-10-20

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