STING induces early IFN-β in the liver and constrains myeloid cell-mediated dissemination of murine cytomegalovirus

STING induces early IFN-β in the liver and constrains myeloid cell-mediated dissemination of murine cytomegalovirus
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STING 在肝脏中诱导早期 IFN-β 并限制骨髓细胞介导的鼠巨细胞病毒传播

DOI:
10.1038/s41467-019-10863-0
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发表时间:
2019
影响因子:
16.6
通讯作者:
U. Kalinke
U. Kalinke
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Pia;Julia Spanier;K. Borst;J. Becker;André Riedl;C. Hirche;L. Ghita;Jennifer Skerra;Kira Baumann;S. Lienenklaus;Marius Doering;Z. Ruzsics;U. Kalinke

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巨细胞病毒是一种DNA编码的β疱疹病毒,在巨噬细胞中诱导STING依赖性1型干扰素应答,并使用骨髓细胞作为传播媒介。在这里,我们报告说,STING基因敲除小鼠对鼠巨细胞病毒(MCMV)感染的抗性与野生型对照组一样,而Toll样受体/RIG-I样受体/STING信号转导缺陷的小鼠不会产生1型干扰素应答并死于感染。尽管单独的STING对存活是不利的,但库普弗细胞中的早期IFN-β诱导是STING依赖性的,并控制早期肝病毒繁殖。用诱导型报告基因MCMV进行的感染实验表明,STING限制了MCMV在骨髓细胞中的复制,并限制了病毒通过这些细胞的传播。相比之下,病毒从肝细胞传播到其他器官的限制是独立的STING。因此,在MCMV感染期间,STING参与枯否细胞中早期IFN-β的诱导以及限制病毒通过骨髓细胞传播,而它对于生存是不可或缺的。先天免疫信号通路感知不同的微生物特征,并可引发不同但重叠的免疫应答。在这里,作者剖析了这些途径对MCMV感染反应的贡献,发现STING信号传导对宿主存活至关重要,但对限制病毒复制和通过骨髓细胞传播至关重要。
Cytomegalovirus is a DNA-encoded β-herpesvirus that induces STING-dependent type 1 interferon responses in macrophages and uses myeloid cells as a vehicle for dissemination. Here we report that STING knockout mice are as resistant to murine cytomegalovirus (MCMV) infection as wild-type controls, whereas mice with a combined Toll-like receptor/RIG-I-like receptor/STING signaling deficiency do not mount type 1 interferon responses and succumb to the infection. Although STING alone is dispensable for survival, early IFN-β induction in Kupffer cells is STING-dependent and controls early hepatic virus propagation. Infection experiments with an inducible reporter MCMV show that STING constrains MCMV replication in myeloid cells and limits viral dissemination via these cells. By contrast, restriction of viral dissemination from hepatocytes to other organs is independent of STING. Thus, during MCMV infection STING is involved in early IFN-β induction in Kupffer cells and the restriction of viral dissemination via myeloid cells, whereas it is dispensable for survival. Innate immune signaling pathways sense different microbial features and can elicit distinct yet overlapping immune responses. Here the authors dissect the contribution of these pathways to the response to MCMV infection and find that STING signaling is dispensable for host survival but crucial to restrict viral replication and dissemination via myeloid cells.
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