Cyclic GMP-AMP synthase is an innate immune sensor of HIV and other retroviruses.

Cyclic GMP-AMP synthase is an innate immune sensor of HIV and other retroviruses.
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DOI:
10.1126/science.1240933
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发表时间:
2013-08-23
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:
Gao D;Wu J;Wu YT;Du F;Aroh C;Yan N;Sun L;Chen ZJ

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逆转录病毒,包括HIV,可以激活先天免疫反应,但逆转录病毒的宿主传感器在很大程度上是未知的。在这里,我们表明,HIV感染激活环GMP-AMP(cGAMP)合酶(cGAS)产生cGAMP,cGAMP结合并激活衔接蛋白STING以诱导I型干扰素和其他细胞因子。HIV逆转录酶的抑制剂,而不是整合酶,消除了病毒对干扰素-β的诱导,这表明逆转录的HIV DNA触发了先天免疫应答。小鼠或人细胞系中cGAS的敲除或敲低阻断了HIV、鼠白血病病毒(MLV)和猿猴免疫缺陷病毒(SIV)的细胞因子诱导。这些结果表明cGAS是HIV和其他逆转录病毒的先天免疫传感器。
Retroviruses, including HIV, can activate innate immune responses, but the host sensors for retroviruses are largely unknown. Here we show that HIV infection activates cyclic-GMP-AMP (cGAMP) synthase (cGAS) to produce cGAMP, which binds to and activates the adaptor protein STING to induce type-I interferons and other cytokines. Inhibitors of HIV reverse transcriptase, but not integrase, abrogated interferon-β induction by the virus, suggesting that the reverse transcribed HIV DNA triggers the innate immune response. Knockout or knockdown of cGAS in mouse or human cell lines blocked cytokine induction by HIV, murine leukemia virus (MLV) and Simian immunodeficiency virus (SIV). These results indicate that cGAS is an innate immune sensor of HIV and other retroviruses.
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