IL-10 Signaling Remodels Adipose Chromatin Architecture to Limit Thermogenesis and Energy Expenditure.

IL-10 Signaling Remodels Adipose Chromatin Architecture to Limit Thermogenesis and Energy Expenditure.
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IL-10信号重塑脂肪染色质结构,限制产热和能量消耗

DOI:
10.1016/j.cell.2017.11.019
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发表时间:
2018-01-11
期刊:
影响因子:
64.5
通讯作者:
Tontonoz P
Tontonoz P
中科院分区:
生物学1区
文献类型:
--
作者:
Rajbhandari P;Thomas BJ;Feng AC;Hong C;Wang J;Vergnes L;Sallam T;Wang B;Sandhu J;Seldin MM;Lusis AJ;Fong LG;Katz M;Lee R;Young SG;Reue K;Smale ST;Tontonoz P

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促进脂肪组织产热的信号通路已被很好地表征,但能量消耗的限制因素在很大程度上是未知的。在这里,我们表明,消除抗炎细胞因子IL-10改善胰岛素敏感性,防止饮食诱导的肥胖,并消除白色脂肪组织的布朗宁。机制研究将骨髓细胞定义为IL-10信号的来源,将脂肪细胞定义为介导这些效应的靶细胞类型。IL-10受体α在成熟脂肪细胞中高度富集,并响应于分化、肥胖和衰老而被诱导。转座酶可及染色质测序(ATAC-seq)、ChIP-seq和RNA-seq分析显示,IL-10通过改变染色质可及性并抑制ATF和C/EBPβ募集至关键增强子区域来抑制脂肪细胞中产热基因的转录。这些发现扩展了我们对炎症信号通路和脂肪组织功能之间关系的理解,并提供了对生热的生理控制的见解,可以为未来的治疗提供信息。抗炎细胞因子抑制脂肪细胞产热以限制能量消耗。
Signaling pathways that promote adipose tissue thermogenesis are well characterized, but the limiters of energy expenditure are largely unknown. Here, we show that ablation of the anti-inflammatory cytokine IL-10 improves insulin sensitivity, protects against diet-induced obesity, and elicits the browning of white adipose tissue. Mechanistic studies define bone marrow cells as the source of the IL-10 signal and adipocytes as the target cell type mediating these effects. IL-10 receptor alpha is highly enriched in mature adipocytes and is induced in response to differentiation, obesity, and aging. Assay for transposase-accessible chromatin sequencing (ATAC-seq), ChIP-seq, and RNA-seq reveal that IL-10 represses the transcription of thermogenic genes in adipocytes by altering chromatin accessibility and inhibiting ATF and C/EBPβ recruitment to key enhancer regions. These findings expand our understanding of the relationship between inflammatory signaling pathways and adipose tissue function and provide insight into the physiological control of thermogenesis that could inform future therapy. An anti-inflammatory cytokine suppresses adipocyte thermogenesis to limit energy expenditure.
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