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- W2106461424 endingPage "5504" @default.
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- W2106461424 abstract "Interleukin-6 (IL-6), involved in cancer-related inflammation, acts as an autocrine and paracrine growth factor, which promotes angiogenesis, metastasis, and subversion of immunity, and changes the response to hormones and to chemotherapeutics. We explored transcription mechanisms involved in differential IL-6 gene expression in breast cancer cells with different metastatic properties. In weakly metastatic MCF7 cells, histone H3 K9 methylation, HP1 binding, and weak recruitment of AP-1 Fra-1/c-Jun, NF-κB p65 transcription factors, and coactivators is indicative of low chromatin accessibility and gene transcription at the IL-6 gene promoter. In highly metastatic MDA-MB231 cells, strong DNase, MNase, and restriction enzyme accessibility, as well potent constitutive transcription of the IL-6 gene promoter, coincide with increased H3 S10 K14 phosphoacetylation and promoter enrichment of AP-1 Fra-1/c-Jun and NF-κB p65 transcription factors and MSK1, CBP/p300, Brg1, and Ezh2 cofactors. Complementation, silencing, and kinase inhibitor experiments further demonstrate involvement of AP-1 Fra-1/c-Jun and NF-κB p65/RelB members, but not of the alpha estrogen receptor in promoting chromatin accessibility and transcription across the IL-6 gene promoter in metastatic breast cancer cells. Finally, the natural withanolide Withaferin A was found to repress IL-6 gene transcription in metastatic breast cancer cells upon dual inhibition of NF-κB and AP-1 Fra-1 transcription factors and silencing of IL-6 promoter chromatin accessibility." @default.
- W2106461424 created "2016-06-24" @default.
- W2106461424 creator A5003141781 @default.
- W2106461424 creator A5011060423 @default.
- W2106461424 creator A5018767436 @default.
- W2106461424 creator A5026815635 @default.
- W2106461424 creator A5052226197 @default.
- W2106461424 creator A5055657583 @default.
- W2106461424 creator A5060863599 @default.
- W2106461424 date "2009-10-01" @default.
- W2106461424 modified "2023-10-18" @default.
- W2106461424 title "Hyperactivated NF-κB and AP-1 Transcription Factors Promote Highly Accessible Chromatin and Constitutive Transcription across the Interleukin-6 Gene Promoter in Metastatic Breast Cancer Cells" @default.
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