Remodelling of the gut microbiota by hyperactive NLRP3 induces regulatory T cells to maintain homeostasis.

Remodelling of the gut microbiota by hyperactive NLRP3 induces regulatory T cells to maintain homeostasis.
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过度活跃的 NLRP3 重塑肠道微生物群,诱导调节性 T 细胞维持体内平衡

DOI:
10.1038/s41467-017-01917-2
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发表时间:
2017-12-01
影响因子:
16.6
通讯作者:
Meng G
Meng G
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Yao X;Zhang C;Xing Y;Xue G;Zhang Q;Pan F;Wu G;Hu Y;Guo Q;Lu A;Zhang X;Zhou R;Tian Z;Zeng B;Wei H;Strober W;Zhao L;Meng G

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炎性小体参与肠道稳态和炎症病理,但NLRP 3炎性小体在这些过程中的作用还不清楚。具有NLRP 3突变的Cryopyrin相关周期性综合征(CAPS)患者在皮肤,关节和眼睛中具有自身炎症,但在肠道中没有。在这里,我们表明携带Nlrp 3 R258 W突变的CAPS模型小鼠的肠道维持肠道内稳态。此外,这些小鼠对实验性结肠炎和结直肠癌具有强烈的抵抗力;这主要是通过重塑肠道微生物群,由于调节性T细胞(T细胞)的诱导增加而具有增强的抗炎能力。在机制上,NLRP 3R 258 W仅在固有层单核吞噬细胞中起作用,以直接增强IL-1β而不是IL-18分泌。增加的IL-1β促进局部抗微生物肽以促进微生物群重塑。我们的数据表明,NLRP 3R 258 W诱导的肠道微生物群重塑,诱导局部THP维持稳态并补偿否则有害的肠道炎症。炎性小体参与肠道稳态和炎性病理。作者表明,过度活跃的NLRP 3炎性体通过重塑肠道微生物群和诱导调节性T细胞来维持肠道稳态。
Inflammasomes are involved in gut homeostasis and inflammatory pathologies, but the role of NLRP3 inflammasome in these processes is not well understood. Cryopyrin-associated periodic syndrome (CAPS) patients with NLRP3 mutations have autoinflammation in skin, joints, and eyes, but not in the intestine. Here we show that the intestines of CAPS model mice carrying an Nlrp3 R258W mutation maintain homeostasis in the gut. Additionally, such mice are strongly resistant to experimental colitis and colorectal cancer; this is mainly through a remodelled gut microbiota with enhanced anti-inflammatory capacity due to increased induction of regulatory T cells (Tregs). Mechanistically, NLRP3R258W functions exclusively in the lamina propria mononuclear phagocytes to directly enhance IL-1β but not IL-18 secretion. Increased IL-1β boosts local antimicrobial peptides to facilitate microbiota remodelling. Our data show that NLRP3R258W-induced remodelling of the gut microbiota, induces local Tregs to maintain homeostasis and compensate for otherwise-detrimental intestinal inflammation. Inflammasomes are involved in gut homeostasis and inflammatory pathologies. The authors show that a hyperactive NLRP3 inflammasome maintains gut homeostasis through remodelling of the gut microbiota and induction of regulatory T cells.
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