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- W4361244080 abstract "<div>Abstract<p><i>p53</i> alterations in human tumors often involve missense mutations that may confer dominant-negative or gain-of-function properties. Dominant-negative effects result in inactivation of wild-type p53 protein in heterozygous mutant cells and as such in a p53 null phenotype. Gain-of-function effects can directly promote tumor development or metastasis through antiapoptotic mechanisms or transcriptional activation of (onco)genes. Here, we show, using conditional mouse technology, that epithelium-specific heterozygous expression of mutant p53 (i.e., the <i>p53.R270H</i> mutation that is equivalent to the human hotspot R273H) results in an increased incidence of spontaneous and UVB-induced skin tumors. Expression of <i>p53.R270H</i> exerted dominant-negative effects on latency, multiplicity, and progression status of UVB-induced but not spontaneous tumors. Surprisingly, gain-of-function properties of <i>p53.R270H</i> were not detected in skin epithelium. Apparently, dominant-negative and gain-of-function effects of mutant p53 are highly tissue specific and become most manifest upon stabilization of p53 after DNA damage. [Cancer Res 2007;67(10):4648–56]</p></div>" @default.
- W4361244080 created "2023-03-31" @default.
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- W4361244080 date "2023-03-30" @default.
- W4361244080 modified "2023-09-27" @default.
- W4361244080 title "Data from Dominant-Negative but not Gain-of-Function Effects of a <i>p53.R270H</i> Mutation in Mouse Epithelium Tissue after DNA Damage" @default.
- W4361244080 doi "https://doi.org/10.1158/0008-5472.c.6495837" @default.
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