Journal
MEDICAL ONCOLOGY
Volume 28, Issue -, Pages S381-S387Publisher
HUMANA PRESS INC
DOI: 10.1007/s12032-010-9679-9
Keywords
Apoptosis; Cell cycle; Mutant p53; Prostate cancer; RNA interference
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p53 is the most frequently mutated tumor suppressor gene in human cancer. Recent studies have indicated that p53 mutants not only lose tumor suppression activity but also gain novel oncogenic functions that contribute to tumor malignancy. In this study, we explored mutant p53 as a target for novel anti-cancer treatment in prostate cancer. Using the DU145 human androgen-independent prostate cancer cell line, we show that silencing of mutant p53 gene by RNA interference led to significant inhibition of cell viability and growth, which was associated with cell cycle arrest at G1 and G2/M phase, and ultimately induced massive apoptosis. Mechanistically, p53-siRNA inhibited phosphatidylinositol 30-kinase/Akt signaling pathway, which might be responsible for the reduced proliferation and apoptosis induction. These findings suggest that RNA interference targeting mutant p53 may serve as a novel therapeutic strategy for the treatment of androgen-independent prostate cancer.
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