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- W2049672603 abstract "Activating enhancer-binding protein 2gamma (AP-2gamma) is a member of the developmentally regulated AP-2 transcription factor family that regulates the expression of many downstream genes. Whereas the effects of AP-2alpha overexpression on cell growth are fairly well established, the cellular effects of AP-2gamma overexpression are less well studied. Our new findings show that AP-2gamma significantly upregulates p21 mRNA and proteins, inhibits cell growth, and decreases clonogenic survival. Cell cycle analysis revealed that forced AP-2gamma expression induced G1-phase arrest, decreased DNA synthesis, and decreased the fraction of cells in S phase. AP-2gamma expression also led to cyclin D1 repression, decreased Rb phosphorylation, and decreased E2F activity in breast carcinoma cells. AP-2gamma binding to the p21 promoter was observed in vivo, and the absence of growth inhibition in response to AP-2gamma expression in p21(-/-) cells demonstrated that p21 caused, at least in part, AP-2-induced cell cycle arrest. Finally, the tumor growth of human breast carcinoma cells in vivo was inhibited by the expression of AP-2gamma relative to empty vector-infected cells, suggesting that AP-2gamma acts as a tumor suppressor. In summary, expression of either AP-2gamma or AP-2alpha inhibited breast carcinoma cell growth; thus, these genes may be therapeutic targets for breast cancer." @default.
- W2049672603 created "2016-06-24" @default.
- W2049672603 creator A5031993414 @default.
- W2049672603 creator A5036264139 @default.
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- W2049672603 date "2006-07-01" @default.
- W2049672603 modified "2023-09-27" @default.
- W2049672603 title "AP-2γ Induces p21 Expression, Arrests Cell Cycle, Inhibits the Tumor Growth of Human Carcinoma Cells" @default.
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- W2049672603 doi "https://doi.org/10.1593/neo.06367" @default.
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