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Genome-wide binding sites of Foxp4 in beige adipocyte

ABSTRACT: We found deletion of Foxp4 in mature adipocytes would augment juvenile and mature beige adipocyte thermogenesis.In order to investage the binding site of Foxp4 in the genome of beige adipocytes, we did Foxp4 ChIP-Seq with differentiated SVF cells derived from ingunal adipose tissues.

ORGANISM(S): Mus musculus

PROVIDER: GSE199559 | GEO | 2022/04/06

REPOSITORIES: GEO

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The binding sites of Foxp4 on genome in the early stage of SVF cells differentiating to beige adipocytes

Project description:We found deletion of Foxp4 in SVF cells would inhibit beige adipocyte differentiation and thermogenesis.In order to investage the binding sites of Foxp4 on genome of SVF cells, we isolated SVF cells from ingunal adipose tissues and did Foxp4 and H3K27ac ChIP-Seqs after two days' browning differentiaion.

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Genome-wide binding sites of Foxp4 in beige adipocyte

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Project description:Activation of brown adipose tissue (BAT) thermogenesis increases energy expenditure and alleviates obesity. Epigenetic regulation has emerged as a key mechanism underlying BAT development and function. To study the epigenetic regulation of BAT thermogenesis, we surveyed the expression of epigenetic enzymes that catalyze histone modifications in developmental beige adipocytes and found a unique expression pattern of suppressor of variegation 4-20 homolog 2 (Drosophila) (Suv420h2), a histone methyltransferase that preferentially catalyzes the tri-methylation at histone H4 lysine 20 (H4K20me3), a hallmark of gene silencing. Here we discovered that Suv420h2 expression parallels that of UCP1 expression in brown and beige adipocytes and that SUV420H2 knockdown significantly reduces, whereas SUV420H2 overexpression significantly increases UCP1 levels in brown adipocytes. Suv420h2 knockout (H2KO mice exhibit impaired cold-induced thermogenesis and are prone to diet-induced obesity. In contrast, mice with specific overexpression of Suv420h2 in adipocytes display enhanced cold-induced thermogenesis and are resistant to diet-induced obesity. Further study showed that Suv420h2 catalyzes H4K20 trimethylation at eukaryotic translation initiation factor 4E-binding protein 1 (4E-BP1) promoter, leading to down-regulated expression of 4E-BP1, a negative regulator of the translation initiation complex. This in turn up-regulates PGC1α protein levels, which is associated with increased expression of thermogenic program. We conclude that Suv420h2 is a key regulator of brown/beige adipocyte development and thermogenesis.

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