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Ⅰ型干扰素感应可激活休眠脂肪细胞的炎症潜能。

Type I interferon sensing unlocks dormant adipocyte inflammatory potential.

机构信息

Medical Scientist Training Program, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH, 45220, USA.

Immunology Graduate Program, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH, 45220, USA.

出版信息

Nat Commun. 2020 Jun 2;11(1):2745. doi: 10.1038/s41467-020-16571-4.

Abstract

White adipose tissue inflammation, in part via myeloid cell contribution, is central to obesity pathogenesis. Mechanisms regulating adipocyte inflammatory potential and consequent impact of such inflammation in disease pathogenesis remain poorly defined. We show that activation of the type I interferon (IFN)/IFNα receptor (IFNAR) axis amplifies adipocyte inflammatory vigor and uncovers dormant gene expression patterns resembling inflammatory myeloid cells. IFNβ-sensing promotes adipocyte glycolysis, while glycolysis inhibition impeded IFNβ-driven intra-adipocyte inflammation. Obesity-driven induction of the type I IFN axis and activation of adipocyte IFNAR signaling contributes to obesity-associated pathogenesis in mice. Notably, IFNβ effects are conserved in human adipocytes and detection of the type I IFN/IFNAR axis-associated signatures positively correlates with obesity-driven metabolic derangements in humans. Collectively, our findings reveal a capacity for the type I IFN/IFNAR axis to regulate unifying inflammatory features in both myeloid cells and adipocytes and hint at an underappreciated contribution of adipocyte inflammation in disease pathogenesis.

摘要

白色脂肪组织炎症,部分通过髓系细胞贡献,是肥胖发病机制的核心。调节脂肪细胞炎症潜能的机制以及这种炎症对疾病发病机制的影响仍未得到明确界定。我们发现,I 型干扰素 (IFN)/IFNα 受体 (IFNAR) 轴的激活放大了脂肪细胞的炎症活力,并揭示了类似于炎症性髓系细胞的休眠基因表达模式。IFNβ 感应促进脂肪细胞糖酵解,而糖酵解抑制则阻碍 IFNβ 驱动的脂肪细胞内炎症。肥胖驱动的 I 型 IFN 轴诱导和脂肪细胞 IFNAR 信号转导有助于小鼠肥胖相关发病机制。值得注意的是,IFNβ 的作用在人类脂肪细胞中是保守的,并且检测到 I 型 IFN/IFNAR 轴相关特征与人类肥胖驱动的代谢紊乱呈正相关。总的来说,我们的研究结果揭示了 I 型 IFN/IFNAR 轴在髓系细胞和脂肪细胞中调节统一炎症特征的能力,并暗示了脂肪细胞炎症在发病机制中的作用被低估。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6487/7265526/a514a7249266/41467_2020_16571_Fig1_HTML.jpg

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