Interferon Regulatory Factors IRF1 and IRF7 Directly Regulate Gene Expression in Bats in Response to Viral Infection.

Interferon Regulatory Factors IRF1 and IRF7 Directly Regulate Gene Expression in Bats in Response to Viral Infection.
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DOI:
10.1016/j.celrep.2020.108345
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发表时间:
2020-11-03
期刊:
影响因子:
8.8
通讯作者:
Wang LF
Wang LF
中科院分区:
生物学1区
文献类型:
--
作者:
Irving AT;Zhang Q;Kong PS;Luko K;Rozario P;Wen M;Zhu F;Zhou P;Ng JHJ;Sobota RM;Wang LF

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蝙蝠细胞和组织具有通常与干扰素α(IFNα)信号传导相关的抗病毒基因的升高的基础表达水平。在这里,我们显示干扰素调节因子1(IRF 1),3,和7水平升高,在大多数蝙蝠组织,基本上,IRFs有助于I型IFN配体的表达和高表达的干扰素调节基因(IRGs)。细胞中IRF 1/3/7的CRISPR敲除(KO)揭示了以IFN-配体信号传导依赖性和很大程度上独立的方式受每个IRF影响的不同基因子集。作为先天免疫的主要调节因子,IRF控制IRG应答的动力学和维持,并在应答甲型流感病毒(IAV)、单纯疱疹病毒1型(HSV-1)、梅拉卡病毒/Pteropine orthoreovirus 3梅拉卡(PRV 3 M)和中东呼吸综合征相关冠状病毒(MERS-CoV)感染中发挥重要作用。由于其在蝙蝠中的差异表达与在人类中的差异表达相比,这突出了基础IRF表达在病毒应答中的关键作用,并且可能在蝙蝠中的免疫细胞发育中与IRF在人类生物学中的功能相关。蝙蝠通过转录因子IRF 1/3/7表达高水平的抗病毒基因以响应合成的dsRNA、IFN或病毒。欧文等人表明这种诱导在很大程度上绕过了IFNα/β的产生,这可能是一种限制IFN信号传导诱导的炎症同时仍然限制病毒感染的方法。
Bat cells and tissue have elevated basal expression levels of antiviral genes commonly associated with interferon alpha (IFNα) signaling. Here, we show Interferon Regulatory Factor 1 (IRF1), 3, and 7 levels are elevated in most bat tissues and that, basally, IRFs contribute to the expression of type I IFN ligands and high expression of interferon regulated genes (IRGs). CRISPR knockout (KO) of IRF 1/3/7 in cells reveals distinct subsets of genes affected by each IRF in an IFN-ligand signaling-dependent and largely independent manner. As the master regulators of innate immunity, the IRFs control the kinetics and maintenance of the IRG response and play essential roles in response to influenza A virus (IAV), herpes simplex virus 1 (HSV-1), Melaka virus/Pteropine orthoreovirus 3 Melaka (PRV3M), and Middle East respiratory syndrome-related coronavirus (MERS-CoV) infection. With its differential expression in bats compared to that in humans, this highlights a critical role for basal IRF expression in viral responses and potentially immune cell development in bats with relevance for IRF function in human biology. Bats express high levels of antiviral genes in response to synthetic dsRNA, IFN, or virus by the transcription factors IRF1/3/7. Irving et al. show that this induction largely bypasses IFNα/β production and that this may be a method for limiting the inflammation induced by IFN signaling while still restricting virus infection.
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