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• W2000463332 abstract "ZBP-89, a zinc finger transcription factor, participates in histone deacetylases inhibitors (HDACi)-mediated growth arrest and apoptosis in cancer cells. p53 mutants may interact with ZBP-89 that transcriptionally regulates p21(Waf1) (p21). However, this interaction and its consequence in cancer treatments are poorly understood. In this study, we demonstrate that ZBP‑89 is essentially required in HDACi-mediated p21 upregulation in hepetocellular carcinoma (HCC). Overexpression of ZBP-89 protein enhanced the lethal effectiveness of Trichostatin A (TSA). p53 mutant p53(G245D), but not p53(R249S), directly bound to ZBP-89 and prevented its translocation from cytoplasm to nucleus. Furthermore, p53(G245D) was shown to have a similar pattern of subcellular localization to ZBP-89 in tissues of HCC patients in Hong Kong. Functionally, the cytoplasmic accumulation of ZBP-89 by p53(G245D) significantly abrogated the induction of p21 caused by sodium butyrate (NaB) treatment and protected cells from TSA-induced death. The activations of several apoptotic proteins, such as Bid and PARP, were involved in p53(G245D)-mediated protection. Moreover, the resistance to HDACi in p53(G245D)-expressing cells was reversed by overexpression of ZBP-89. Taken together, these data suggest a potential mechanism via which mutant p53 enables tumor cells to resist chemotherapy and, therefore, establish a plausible link between mutant p53 binding to ZBP-89 and a decreased chemosensitivity of HCC cells." @default.
• W2000463332 created "2016-06-24" @default.
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• W2000463332 date "2012-01-15" @default.
• W2000463332 modified "2023-09-22" @default.
• W2000463332 title "Interaction between ZBP-89 and p53 mutants and its contribution to effects of HDACi on hepatocellular carcinoma" @default.
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• W2000463332 doi "https://doi.org/10.4161/cc.11.2.18758" @default.
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