An HDAC3-PROX1 corepressor module acts on HNF4α to control hepatic triglycerides.

An HDAC3-PROX1 corepressor module acts on HNF4α to control hepatic triglycerides.
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DOI:
10.1038/s41467-017-00772-5
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发表时间:
2017-09-15
影响因子:
16.6
通讯作者:
Lazar MA
Lazar MA
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Armour SM;Remsberg JR;Damle M;Sidoli S;Ho WY;Li Z;Garcia BA;Lazar MA

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组蛋白去乙酰化酶HDAC 3是肝脏脂质代谢的关键介质,HDAC 3的肝脏特异性缺失导致脂肪肝。为了阐明潜在的机制,在这里,我们报告了一种交联方法,然后通过质谱法来定义体内高置信度的HDAC 3相互作用组,其中包括典型的NCoR-HDAC 3复合物以及Prospero相关的同源异型盒1蛋白(PROX 1)。HDAC 3和PROX 1广泛共定位于小鼠肝脏基因组上,并被肝细胞核因子4α(HNF 4 α)共募集。HDAC 3-PROX 1模块控制调节脂质稳态的基因程序的表达,并且任一组分的肝特异性消融增加肝脏中的甘油三酯含量。这些发现强调了转录因子和辅助调节因子的特定组合在生物体代谢微调中的重要性。HDAC 3是肝脏脂质代谢的关键介质,其缺失导致脂肪肝。在这里,作者描述了体内肝脏HDAC 3相互作用组,提供了HDAC 3与PROX 1相互作用的证据,并表明HDAC 3和PROX 1控制调节脂质稳态的基因表达。
The histone deacetylase HDAC3 is a critical mediator of hepatic lipid metabolism, and liver-specific deletion of HDAC3 leads to fatty liver. To elucidate the underlying mechanism, here we report a method of cross-linking followed by mass spectrometry to define a high-confidence HDAC3 interactome in vivo that includes the canonical NCoR–HDAC3 complex as well as Prospero-related homeobox 1 protein (PROX1). HDAC3 and PROX1 co-localize extensively on the mouse liver genome, and are co-recruited by hepatocyte nuclear factor 4α (HNF4α). The HDAC3–PROX1 module controls the expression of a gene program regulating lipid homeostasis, and hepatic-specific ablation of either component increases triglyceride content in liver. These findings underscore the importance of specific combinations of transcription factors and coregulators in the fine tuning of organismal metabolism. HDAC3 is a critical mediator of hepatic lipid metabolism and its loss leads to fatty liver. Here, the authors characterize the liver HDAC3 interactome in vivo, provide evidence that HDAC3 interacts with PROX1, and show that HDAC3 and PROX1 control expression of genes regulating lipid homeostasis.
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发表时间: 2001-09-01
影响因子: 5.3
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期刊: Science (New York, N.Y.)
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