Genome-wide coactivation analysis of PGC-1alpha identifies BAF60a as a regulator of hepatic lipid metabolism.
Genome-wide coactivation analysis of PGC-1alpha identifies BAF60a as a regulator of hepatic lipid metabolism.
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DOI:
10.1016/j.cmet.2008.06.013
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发表时间:
2008-08
期刊:
影响因子:
29
通讯作者:
Lin, Jiandie D.
中科院分区:
文献类型:
--
作者:
Li, Sinning;Liu, Chang;Li, Na;Hao, Tong;Han, Ting;Hill, David E.;Vidal, Marc;Lin, Jiandie D.
Impaired mitochondrial function has been implicated in the pathogenesis of type 2 diabetes, heart failure and neurodegeneration as well as during aging. Studies with the PGC-1 transcriptional coactivators have demonstrated that these factors are central components of the regulatory network that controls mitochondrial function in mammalian cells. Here we describe a genome-wide coactivation assay to globally identify transcription factors and cofactors in this pathway. These analyses revealed a molecular signature of the PGC-1α transcriptional network and identified BAF60a (SMARCD1) as a molecular link between the SWI/SNF chromatin-remodeling complexes and hepatic lipid metabolism. Adenoviral-mediated expression of BAF60a stimulates fatty acid β-oxidation in cultured hepatocytes and ameliorates hepatic steatosis in vivo. PGC-1α mediates the recruitment of BAF60a to PPARα binding sites, leading to transcriptional activation of peroxisomal and mitochondrial fat oxidation genes. These results define a role for the SWI/SNF complexes in the regulation of lipid homeostasis.
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