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- W2000704741 abstract "In human breast cancer, mutations in the p53 gene are associated with poor prognosis. However, analysis of patient data so far did not clarify, whether missense point mutations in the p53 gene, in addition to causing loss of wild-type p53 function, also confer a gain of function phenotype to the encoded mutant p53. As heterogeneity of patient material and data might obscure a clear answer, we studied the effects of a coexpressed mutant p53(R270H) in transgenic mice in which SV40 early proteins initiate the development of mammary adenocarcinoma (WAP-T mice). In such tumors the endogenous wild-type p53 is functionally compromised by complex formation with SV40 T-antigen, thereby constituting a loss of wild-type p53 function situation that allowed analysis of the postulated gain of function effects of mutant p53(R270H). We found that mutant p53(R270H) in bi-transgenic mice enhanced the transition from intraepithelial neoplasia to invasive carcinoma, resulting in a higher frequency of invasive carcinoma per gland and per mouse, a more severe tumor phenotype, and more frequent pulmonary metastasis. Surprisingly, mutant p53(R270H) in this system does not increase genomic instability. Therefore, other postulated gain of function activities of mutant p53 must be responsible for the effects described here." @default.
- W2000704741 created "2016-06-24" @default.
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- W2000704741 date "2007-12-18" @default.
- W2000704741 modified "2023-10-15" @default.
- W2000704741 title "Mutant p53R270H gain of function phenotype in a mouse model for oncogene-induced mammary carcinogenesis" @default.
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- W2000704741 doi "https://doi.org/10.1002/ijc.23317" @default.
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