DHX15 is required to control RNA virus-induced intestinal inflammation.

DHX15 is required to control RNA virus-induced intestinal inflammation.
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DOI:
10.1016/j.celrep.2021.109205
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发表时间:
2021-06-22
期刊:
影响因子:
8.8
通讯作者:
Zhang Z
Zhang Z
中科院分区:
生物学1区
文献类型:
--
作者:
Xing J;Zhou X;Fang M;Zhang E;Minze LJ;Zhang Z

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RNA解旋酶在各种生物学过程中发挥关键作用,包括在先天免疫中充当病毒RNA传感器。在此,我们发现RNA解旋酶DEAH-box解旋酶15(DHX 15)对于肠上皮细胞(IEC)响应poly I:C和RNA病毒而产生I型干扰素(IFN-I,IFN-β)、III型IFN(IFN-λ3)和炎性小体衍生的细胞因子IL-18是必需的,其中肠道RNA病毒优先,而不是DNA病毒。重要的是,我们产生了IEC特异性Dhx 15敲除小鼠,并证明DHX 15是控制乳鼠肠道RNA病毒轮状病毒和成年小鼠体内呼肠孤病毒诱导的肠道炎症所必需的,这归因于Dhx 15缺陷小鼠IEC中IFN-β,IFN-λ3和IL-18的产生受损。机制上,DHX 15与NLRP 6相互作用以触发NLRP 6炎性体组装和活化,从而诱导IEC中的IL-18分泌。总的来说,我们的报告揭示了DHX 15在IEC中感知肠道RNA病毒和控制肠道炎症方面的关键作用。Xing等人表明,DHX 15作为RNA病毒传感器在IEC中产生IFN-β、IFN-λ3和IL-18,并且是体内控制RNA病毒诱导的肠道炎症所必需的。他们进一步证明DHX 15与NLRP 6相互作用以触发IEC中IL-18分泌的NLRP 6炎性体活化。
RNA helicases play critical roles in various biological processes, including serving as viral RNA sensors in innate immunity. Here, we find that RNA helicase DEAH-box helicase 15 (DHX15) is essential for type I interferon (IFN-I, IFN-β), type III IFN (IFN-λ3), and inflammasome-derived cytokine IL-18 production by intestinal epithelial cells (IECs) in response to poly I:C and RNA viruses with preference of enteric RNA viruses, but not DNA virus. Importantly, we generate IEC-specific Dhx15-knockout mice and demonstrate that DHX15 is required for controlling intestinal inflammation induced by enteric RNA virus rotavirus in suckling mice and reovirus in adult mice in vivo, which owes to impaired IFN-β, IFN-λ3, and IL-18 production in IECs from Dhx15-deficient mice. Mechanistically, DHX15 interacts with NLRP6 to trigger NLRP6 inflammasome assembly and activation for inducing IL-18 secretion in IECs. Collectively, our report reveals critical roles for DHX15 in sensing enteric RNA viruses in IECs and controlling intestinal inflammation. Xing et al. show that DHX15 functions as an RNA virus sensor to produce IFN-β, IFN-λ3, and IL-18 in IECs and is required to control RNA virus-induced intestinal inflammation in vivo. They further demonstrate that DHX15 interacts with NLRP6 to trigger NLRP6 inflammasome activation for IL-18 secretion in IECs.
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