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- W2170709726 abstract "The beta-catenin protein plays a critical role in embryonic development and mature tissue homeostasis through its effects on E-cadherin-mediated cell adhesion and Wnt-dependent signal transduction. In colon and other cancers, mutations of beta-catenin or the adenomatous polyposis coli (APC) tumor suppressor appear to stabilize beta-catenin and enhance its interaction with T cell factor (TCF) or lymphoid enhancer factor (Lef) transcription factors. At present, a complete picture of the means by which beta-catenin's interactions with TCF/Lef proteins contribute to neoplastic transformation is lacking. We report that the transcriptional coactivator p300 interacts with beta-catenin in vitro and in vivo and is critical for beta-catenin-mediated neoplastic transformation. p300 synergistically activates beta-catenin/TCF transcription, and their biochemical association requires the CH1 domain of p300 and a region of beta-catenin that includes its NH(2)-terminal transactivation domain and the first two armadillo repeats. Lowering of cellular p300 levels by using a ribozyme directed against p300 reduced TCF transcriptional activity and inhibited the neoplastic growth properties of a beta-catenin-transformed rat epithelial cell line and a human colon carcinoma line with a beta-catenin mutation. These findings demonstrate a critical role for p300 in beta-catenin/TCF transcription and in cancers arising from defects in beta-catenin regulation." @default.
- W2170709726 created "2016-06-24" @default.
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- W2170709726 date "2000-10-24" @default.
- W2170709726 modified "2023-10-16" @default.
- W2170709726 title "Regulation of β-catenin transformation by the p300 transcriptional coactivator" @default.
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- W2170709726 doi "https://doi.org/10.1073/pnas.220158597" @default.
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