CELL:肠道菌群通过胆酸-I型IFN信号轴限制病毒传播

2020-07-15 MedSci原创 MedSci原创

基孔肯雅病毒(CHIKV)是一种新出现的阿尔法病毒,已经感染了数百万人。然而,至今为止,我们对于调控疾病结果的因素仍然知之甚少。

基孔肯雅病毒(CHIKV)是一种新出现的阿尔法病毒,已经感染了数百万人。然而,至今为止,我们对于调控疾病结果的因素仍然知之甚少。

最近,研究人员发现,在无菌小鼠或口服抗生素耗竭肠道微生物的常规饲养小鼠中,在病毒接种的1天内发生了更严重的CHIKV感染和传播。

微生物组的变化改变了浆细胞树突状细胞(pDCs)的TLR7-MyD88信号,并钝化了I型干扰素(IFN)的系统性产生。因此,循环中的单核细胞表达较少的IFN刺激基因,并允许CHIKV感染的发生。

此外,研究人员还发现,定植单一细菌物种,Clostridium scindens,或其衍生的代谢物,次级胆汁酸脱氧胆酸,就可以恢复pDC和MyD88依赖的I型IFN反应,以限制全身CHIKV的感染和向蚊媒的传播。

因此,共生肠道细菌在感染后数小时内通过胆汁酸-pDC-IFN信号轴调控抗病毒免疫和循环α病毒水平,从而影响病毒感染、传播和潜在的传播。

 

原始出处:

Emma S. Winkler et al. The Intestinal Microbiome Restricts Alphavirus Infection and Dissemination through a Bile Acid-Type I IFN Signaling Axis, CELL (2020). DOI:https://doi.org/10.1016/j.cell.2020.06.029

 

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    2020-12-29 维他命
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    2020-07-17 bugit

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