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Hot Spot Mutation In Tp53 (R248q) Causes Oncogenic Gain-Of-Function Phenotypes In A Breast Cancer Cell Line Derived From An African American Patient, Nataly Shtraizent, Hiroshi Matsui, Alla Polotskaia, Jill Bargonetti
Hot Spot Mutation In Tp53 (R248q) Causes Oncogenic Gain-Of-Function Phenotypes In A Breast Cancer Cell Line Derived From An African American Patient, Nataly Shtraizent, Hiroshi Matsui, Alla Polotskaia, Jill Bargonetti
Publications and Research
African American (AA) breast cancer patients often have triple negative breast cancer (TNBC) that contains mutations in the TP53 gene. The point mutations at amino acid residues R273 and R248 both result in oncogenic gain-of-function (GOF) phenotypes. Expression of mutant p53 (mtp53) R273H associates with increased cell elasticity, survival under serum deprivation conditions, and increased Poly (ADP ribose) polymerase 1 (PARP1) on the chromatin in the AA-derived TNBC breast cancer cell line MDA-MB-468. We hypothesized that GOF mtp53 R248Q expression could stimulate a similar phenotype in the AA-derived TNBC cell line HCC70. To test this hypothesis we depleted the R248Q …