Abstract

Ketoconazole has been recently used in the treatment of advanced prostatic cancer and is believed to exert its effect by inhibition of androgen production. In order to determine whether ketoconazole exerts an additional direct cytotoxic effect on prostate cancer cells, we studied its effect on human hormone-independent prostate cancer cell lines (PC-3 and DU-145) in an in vitro clonogenic tumor assay. We showed that clinically achievable doses of ketoconazole caused greater than 90% suppression of tumor colony growth.

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