New progesterone derivatives as inhibitors of 5alpha-reductase enzyme and prostate cancer cell growth |
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Authors: | Cabeza Marisa Bratoeff Eugene Heuze Ivonne Rojas Arely Terán Nayely Ochoa Martha' Ramírez-Apan Teresa Ramírez Elena Pérez Victor Gracia Isabel |
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Institution: | Department of Biological Systems and Animal Production, Metropolitan University-Xochimilco, Mexico, DF Mexico. marisa@correo.xoc.uam.mx |
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Abstract: | In this study we report the synthesis and pharmacological evaluation, in vivo as well as in vitro, of four new progesterone derivatives 4-7. The evaluation in vivo was carried out on gonadectomized male hamsters that were injected subcutaneously daily with 1 mg/Kg of testosterone (T) and/or 1 mg/Kg of finasteride, or with 2 mg/Kg of the novel compounds. It was observed that when testosterone (T) and finasteride or compound 4 were injected together, the weight of the prostate decreased significantly as compared to that oftestosterone-treated animals. Compounds 5-7 did not show any in vivo activity. The 5alpha-reductase inhibitory activity of the novel compounds was determined in vitro using human prostate homogenates; the steroids 4-7 inhibited the 5alpha-reductase activity with IC50 values lower than that for the reference compound finasteride. 3. The effect of compounds 4-7 on the growth of lymphocytes and prostate cancer culture cells line was that steroid 4 inhibited the growth of both cells lines at a concentration of 50 microM and showed a cytotoxic effect whereas compounds 5-7 showed a much lower inhibition. Nevertheless steroids 4-7 didn't exhibit any toxic effects in vivo since the animals remained alive during the six days of treatment. |
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