, Volume 17, Issue 4, pp 337-344

Role of p27 in Prostate Carcinogenesis

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The cyclin dependent kinase inhibitor p27 binds to and inhibits preferentially S-phase kinases thereby halting cell cycle progression. Loss of p27 expression has been shown to be associated with aggressive behavior in a variety of human epithelial tumors including prostate cancer. In this review, the role of p27 in cell cycle progression as well as its regulation by the ubiquitin-proteasome pathway are discussed. The experimental evidence pointing to the role of p27 as a tumor suppressor gene is outlined. The data generated to date on the prognostic significance of loss of p27 protein expression in human prostate cancers are summarized. Finally, the implications of the changes in p27 expression which occur as a result of androgen ablation in normal and neoplastic prostate are discussed.