STING-Dependent Signaling Underlies IL-10 Controlled Inflammatory Colitis.

STING-Dependent Signaling Underlies IL-10 Controlled Inflammatory Colitis.
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DOI:
10.1016/j.celrep.2017.11.101
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发表时间:
2017-12-26
期刊:
影响因子:
8.8
通讯作者:
Barber GN
Barber GN
中科院分区:
生物学1区
文献类型:
--
作者:
Ahn J;Son S;Oliveira SC;Barber GN

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肠道免疫动态平衡是通过共生细菌与宿主相互作用产生一系列平衡的细胞因子来维持的,这些细胞因子对于伤口修复和对抗感染是必不可少的。炎症性肠病(IBD)可导致结肠炎相关癌症(CAC),被认为涉及黏膜肠道上皮破裂后的慢性微生物刺激。然而,负责调节这些炎症过程的先天免疫途径仍未完全阐明。在这里,我们显示共生细菌主要影响单核巨噬细胞的刺痛信号,从而产生促炎细胞因子和抗炎IL-10。在没有刺痛的情况下,表现为IL-10丢失的小肠结肠炎被完全消除。在没有cGAS的情况下,肠道炎症不那么严重,这可能表明环状二核苷酸(CDN)间接调节STING信号的作用。我们的数据揭示了炎症的原因,并为预防IBD提供了一个潜在的治疗靶点。
Intestinal immune homeostasis is preserved by commensal bacteria interacting with the host to generate a balanced array of cytokines that are essential for wound repair and for combatting infection. Inflammatory Bowel Disease (IBD), which can lead to colitis-associated cancer (CAC), is thought to involve chronic microbial irritation following a breach of the mucosal intestinal epithelium. However, the innate immune pathways responsible for regulating these inflammatory processes remain to be fully clarified. Here we show that commensal bacteria influence STING-signaling predominantly in mononuclear phagocytes to produce both pro-inflammatory cytokines as well as anti-inflammatory IL-10. Enterocolitis, manifested through loss of IL-10 was completely abrogated in the absence of STING. Intestinal inflammation was less severe in the absence of cGAS, possibly suggesting a role for cyclic dinucleotides (CDNs) indirectly regulating STING signaling. Our data sheds insight into the causes of inflammation and provides a potential therapeutic target for prevention of IBD.
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