DOK3 maintains intestinal homeostasis by suppressing JAK2/STAT3 signaling and S100a8/9 production in neutrophils.

DOK3 maintains intestinal homeostasis by suppressing JAK2/STAT3 signaling and S100a8/9 production in neutrophils.
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DOK 3通过抑制中性粒细胞中JAK 2/STAT 3信号传导和S100 a8/9产生来维持肠道内稳态。

DOI:
10.1038/s41419-021-04357-5
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发表时间:
2021-11-06
影响因子:
9
通讯作者:
Lam KP
Lam KP
中科院分区:
生物学1区
文献类型:
--
作者:
Loh JT;Lee KG;Lee AP;Teo JKH;Lim HL;Kim SS;Tan AH;Lam KP

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炎症性肠病(IBD)的发病机制如何取决于宿主遗传学,微生物组和免疫系统的复杂相互作用尚未完全了解。在这里,我们发现激酶3(DOK 3)的下游,一种参与免疫信号传导的衔接蛋白,可以保护小鼠免受葡聚糖硫酸钠(DSS)诱导的结肠炎。DOK 3缺陷促进肠道微生物生态失调和结肠炎易感性增强,这可以通过从野生型小鼠转移正常微生物群来逆转。从机制上讲,DOK 3通过抑制结肠嗜中性粒细胞中的JAK 2/STAT 3信号传导以限制其S100 a8/9产生来发挥其保护作用,从而维持肠道微生物生态和结肠稳态。因此,我们的研究结果表明,免疫系统和微生物组以前馈方式发挥作用,DOK 3使结肠中性粒细胞保持静止状态,以建立肠道稳态和保护IBD所必需的肠道微生物组。
How pathogenesis of inflammatory bowel disease (IBD) depends on the complex interplay of host genetics, microbiome and the immune system is not fully understood. Here, we showed that Downstream of Kinase 3 (DOK3), an adapter protein involved in immune signaling, confers protection of mice from dextran sodium sulfate (DSS)-induced colitis. DOK3-deficiency promotes gut microbial dysbiosis and enhanced colitis susceptibility, which can be reversed by the transfer of normal microbiota from wild-type mice. Mechanistically, DOK3 exerts its protective effect by suppressing JAK2/STAT3 signaling in colonic neutrophils to limit their S100a8/9 production, thereby maintaining gut microbial ecology and colon homeostasis. Hence, our findings reveal that the immune system and microbiome function in a feed-forward manner, whereby DOK3 maintains colonic neutrophils in a quiescent state to establish a gut microbiome essential for intestinal homeostasis and protection from IBD.
DOI: 10.1084/jem.20111453
发表时间: 2012-08-27
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