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• W2149044230 abstract "Toward the goal of developing effective treatments for prostate cancers, we examined the effects of cyclin-dependent kinase inhibitors on the survival of prostate cancer cells. We show that roscovitine, R-roscovitine, and CGP74514A (collectively referred to as CKIs) induce the apoptosis of LNCaP and LNCaP-Rf cells, both of which express wild-type p53. Apoptosis required caspase-9 and caspase-3 activity, and cytochrome c accumulated in the cytosol of CKI-treated cells. Amounts of p53 increased substantially in CKI-treated cells, whereas amounts of the endogenous caspase inhibitor XIAP decreased. CKIs did not appreciably induce the apoptosis of LNCaP cells treated with pifithrin-alpha, which prevents p53 accumulation, or of prostate cancer cells that lack p53 function (PC3 and DU145). Ectopic expression of p53 in PC3 cells for 44 hours did not reduce XIAP abundance or induce apoptosis. However, p53-expressing PC3 cells readily apoptosed when exposed to CKIs or when depleted of XIAP by RNA interference. These findings show that CKIs induce the mitochondria-mediated apoptosis of prostate cancer cells by a dual mechanism: p53 accumulation and XIAP depletion. They suggest that these events in combination may prove useful in the treatment of advanced prostate cancers." @default.
• W2149044230 created "2016-06-24" @default.
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• W2149044230 date "2005-09-01" @default.
• W2149044230 modified "2023-09-26" @default.
• W2149044230 title "Accumulation of p53 and Reductions in XIAP Abundance Promote the Apoptosis of Prostate Cancer Cells" @default.
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• W2149044230 doi "https://doi.org/10.1158/0008-5472.can-05-0347" @default.
• W2149044230 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16140939" @default.
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