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- W2476141560 abstract "Endometrial cancers expressing estrogen and progesterone receptors respond to hormonal therapy. The disappearance of steroid hormone receptor expression is common in patients with recurrent disease, ultimately hampering the clinical utility of hormonal therapy. Here, we demonstrate for the first time that nucleophosmin (NPM1/B23) suppression can restore the expression of estrogen receptor α (ESR1/ERα) in endometrial cancer cells. Mechanistically, B23 and activator protein-2γ (TFAP2C/AP2γ) form a complex that acts as a transcriptional repressor of ERα. Our results indicate that B23 or AP2γ knockdown can restore ERα levels and activate ERα-regulated genes (e.g., cathepsin D, EBAG9, and TFF1/pS2). Moreover, AP2γ knockdown in a xenograft model sensitizes endometrial cancer cells to megesterol acetate through the upregulation of ERα expression. An increased immunohistochemical expression of AP2γ is an adverse prognostic factor in endometrial cancer. In summary, B23 and AP2γ may act in combination to suppress ERα expression in endometrial cancer cells. The inhibition of B23 or AP2γ can restore ERα expression and can serve as a potential strategy for sensitizing hormone-refractory endometrial cancers to endocrine therapy." @default.
- W2476141560 created "2016-08-23" @default.
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- W2476141560 date "2016-08-04" @default.
- W2476141560 modified "2023-10-16" @default.
- W2476141560 title "Nucleophosmin/B23 is a negative regulator of estrogen receptor α expression via AP2γ in endometrial cancer cells" @default.
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- W2476141560 doi "https://doi.org/10.18632/oncotarget.11048" @default.
- W2476141560 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5312367" @default.
- W2476141560 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27527851" @default.
- W2476141560 hasPublicationYear "2016" @default.
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