生物
心理压抑
增强子
再分配(选举)
基因
遗传学
细胞
辅因子
转录因子
细胞生物学
基因表达
酶
生物化学
政治学
政治
法学
作者
Søren Fisker Schmidt,Bjørk Ditlev Larsen,Anne Loft,Ronni Nielsen,Jesper Grud Skat Madsen,Susanne Mandrup
出处
期刊:Genome Research
[Cold Spring Harbor Laboratory]
日期:2015-06-25
卷期号:25 (9): 1281-1294
被引量:84
标识
DOI:10.1101/gr.188300.114
摘要
The proinflammatory cytokine tumor necrosis factor (TNF) plays a central role in low-grade adipose tissue inflammation and development of insulin resistance during obesity. In this context, nuclear factor κ-light-chain-enhancer of activated B cells (NFκB) is directly involved and required for the acute activation of the inflammatory gene program. Here, we show that the major transactivating subunit of NFκB, v-rel avian reticuloendotheliosis viral oncogene homolog A (RELA), is also required for acute TNF-induced suppression of adipocyte genes. Notably, this repression does not involve RELA binding to the associated enhancers but rather loss of cofactors and enhancer RNA (eRNA) selectively from high-occupancy sites within super-enhancers. Based on these data, we have developed models that, with high accuracy, predict which enhancers and genes are repressed by TNF in adipocytes. We show that these models are applicable to other cell types where TNF represses genes associated with super-enhancers in a highly cell-type–specific manner. Our results propose a novel paradigm for NFκB-mediated repression, whereby NFκB selectively redistributes cofactors from high-occupancy enhancers, thereby specifically repressing super-enhancer-associated cell identity genes.
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