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An LXR–NCOA5 gene regulatory complex directs inflammatory crosstalk‐dependent repression of macrophage cholesterol efflux 下载免费PDF全文
Mark A Gillespie Elizabeth S Gold Stephen A Ramsey Irina Podolsky Alan Aderem Jeffrey A Ranish 《The EMBO journal》2015,34(9):1244-1258
LXR–cofactor complexes activate the gene expression program responsible for cholesterol efflux in macrophages. Inflammation antagonizes this program, resulting in foam cell formation and atherosclerosis; however, the molecular mechanisms underlying this antagonism remain to be fully elucidated. We use promoter enrichment‐quantitative mass spectrometry (PE‐QMS) to characterize the composition of gene regulatory complexes assembled at the promoter of the lipid transporter Abca1 following downregulation of its expression. We identify a subset of proteins that show LXR ligand‐ and binding‐dependent association with the Abca1 promoter and demonstrate they differentially control Abca1 expression. We determine that NCOA5 is linked to inflammatory Toll‐like receptor (TLR) signaling and establish that NCOA5 functions as an LXR corepressor to attenuate Abca1 expression. Importantly, TLR3–LXR signal crosstalk promotes recruitment of NCOA5 to the Abca1 promoter together with loss of RNA polymerase II and reduced cholesterol efflux. Together, these data significantly expand our knowledge of regulatory inputs impinging on the Abca1 promoter and indicate a central role for NCOA5 in mediating crosstalk between pro‐inflammatory and anti‐inflammatory pathways that results in repression of macrophage cholesterol efflux. 相似文献
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Intrinsic disorder in yeast transcriptional regulatory network 总被引:2,自引:0,他引:2
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Transcriptional regulatory networks underlying gene expression changes in Huntington's disease 下载免费PDF全文
Jeffrey P Cantle Robert M Bragg Peter J Skene Sydney R Coffey Dani E Bergey Vanessa C Wheeler Marcy E MacDonald Nitin S Baliga Jim Rosinski Leroy E Hood Jeffrey B Carroll Nathan D Price 《Molecular systems biology》2018,14(3)
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