Pivotal roles of cGAS-cGAMP signaling in antiviral defense and immune adjuvant effects.

Pivotal roles of cGAS-cGAMP signaling in antiviral defense and immune adjuvant effects.
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DOI:
10.1126/science.1244040
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发表时间:
2013-09-20
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Chen ZJ
Chen ZJ
中科院分区:
其他
文献类型:
--
作者:
Li XD;Wu J;Gao D;Wang H;Sun L;Chen ZJ

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微生物DNA侵入动物细胞的细胞质会引发一系列宿主免疫反应,帮助清除感染;然而,细胞质中的自身DNA可能导致自身免疫性疾病。生物化学方法导致鉴定环GMP-AMP(cGAMP)合酶(cGAS)作为触发先天免疫应答的胞质DNA传感器。我们在此发现,cGas缺陷小鼠的细胞,包括成纤维细胞、巨噬细胞和树突状细胞,在DNA转染或DNA病毒感染时,不能产生I型干扰素和其他细胞因子。与野生型小鼠相比,cGas−/−小鼠对单纯疱疹病毒-1(HSV 1)的致死性感染更敏感。我们还表明,cGAMP是一种佐剂,可促进小鼠抗原特异性T细胞活化和抗体产生。
Invasion of microbial DNA into the cytoplasm of animal cells triggers a cascade of host immune reactions that help clear the infection; however, self DNA in the cytoplasm can cause autoimmune diseases. Biochemical approaches led to the identification of cyclic GMP-AMP (cGAMP) synthase (cGAS) as a cytosolic DNA sensor that triggers innate immune responses. Here we show that cells from cGAS-deficient (cGas−/−) mice, including fibroblasts, macrophages and dendritic cells, failed to produce type-I interferons and other cytokines in response to DNA transfection or DNA virus infection. cGas−/− mice were more susceptible to lethal infection with herpes simplex virus-1 (HSV1) than wild type mice. We also show that cGAMP is an adjuvant that boosts antigen-specific T cell activation and antibody production in mice.
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