Molecular Genetics, College of Arts and Sciences, The Ohio State University, Columbus, OH 43210, USA.
Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA.
J Mol Biol. 2022 Mar 30;434(6):167265. doi: 10.1016/j.jmb.2021.167265. Epub 2021 Sep 22.
Coronavirus disease (COVID-19) is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and is characterized by a delayed interferon (IFN) response and high levels of proinflammatory cytokine expression. Type I and III IFNs serve as a first line of defense during acute viral infections and are readily antagonized by viruses to establish productive infection. A rapidly growing body of work has interrogated the mechanisms by which SARS-CoV-2 antagonizes both IFN induction and IFN signaling to establish productive infection. Here, we summarize these findings and discuss the molecular interactions that prevent viral RNA recognition, inhibit the induction of IFN gene expression, and block the response to IFN treatment. We also describe the mechanisms by which SARS-CoV-2 viral proteins promote host shutoff. A detailed understanding of the host-pathogen interactions that unbalance the IFN response is critical for the design and deployment of host-targeted therapeutics to manage COVID-19.
新型冠状病毒病(COVID-19)由严重急性呼吸系统综合征冠状病毒 2(SARS-CoV-2)引起,其特征为干扰素(IFN)应答延迟和促炎细胞因子表达水平升高。I 型和 III 型 IFN 在急性病毒感染期间作为第一道防线发挥作用,并且很容易被病毒拮抗以建立有感染性的感染。越来越多的研究探讨了 SARS-CoV-2 拮抗 IFN 诱导和 IFN 信号传导以建立有感染性的感染的机制。在这里,我们总结了这些发现,并讨论了阻止病毒 RNA 识别、抑制 IFN 基因表达诱导和阻断 IFN 治疗反应的分子相互作用。我们还描述了 SARS-CoV-2 病毒蛋白促进宿主关闭的机制。详细了解宿主-病原体相互作用,以平衡 IFN 反应,对于设计和部署以宿主为靶向的治疗药物来管理 COVID-19 至关重要。