DNA virus oncoprotein HPV18 E7 selectively antagonizes cGAS-STING-triggered innate immune activation.

DNA virus oncoprotein HPV18 E7 selectively antagonizes cGAS-STING-triggered innate immune activation.
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DOI:
10.1002/jmv.28310
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发表时间:
2023-01
影响因子:
12.7
通讯作者:
Yu, Xiao-Fang
Yu, Xiao-Fang
中科院分区:
医学3区
文献类型:
--
作者:
Lou, Meng;Huang, Dingbo;Zhou, Zhenbang;Shi, Xinyu;Wu, Miaowei;Rui, Yajuan;Su, Jiaming;Zheng, Wenwen;Yu, Xiao-Fang

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DNA 病毒的细胞感染会触发由 DNA 传感器介导的先天免疫反应。环 GMP-AMP 合酶 (cGAS) 干扰素基因刺激剂 (STING) 信号通路已被确定为 DNA 传感通路,可激活干扰素以响应病毒感染,从而介导宿主对病毒的防御。先前的研究已确定 DNA 肿瘤病毒、人乳头瘤病毒 18 (HPV18) 和腺病毒的癌基因 E7 和 E1A 分别为 cGAS-STING 通路的抑制剂。然而,STING 在受感染细胞中的功能以及 HPV18 E7 拮抗 STING 诱导的干扰素 β 产生的机制仍不清楚。我们报告 HPV18 E7 选择性拮抗 STING 触发的活化 B 细胞核因子 kappa 轻链增强子 (NF-κB) 激活,但不拮抗 IRF3 激活。 HPV18 E7 在对 NF-κB 激活至关重要的区域中与 STING 结合,并阻断 p65 的核积累。此外,E7 对 STING 触发的 NF-κB 激活的抑制与 HPV 致病性有关,但与 E7-Rb 结合无关。 HPV18 E7、严重急性呼吸综合征冠状病毒-2开放阅读框3a、人类免疫缺陷病毒-2病毒蛋白X和卡波西肉瘤相关疱疹病毒KSHV病毒干扰素调节因子1选择性抑制STING触发的NF-κB或IRF3激活,表明这些病毒向拮抗宿主先天免疫的方向趋同进化。总的来说,病毒蛋白对 cGAS-STING 通路的选择性抑制可能是一个关键的致病决定因素,使其成为治疗致癌病毒诱发的肿瘤疾病的有希望的靶点。
Cellular infections by DNA viruses trigger innate immune responses mediated by DNA sensors. The cyclic GMP–AMP synthase (cGAS)‐stimulator of interferon gene (STING) signaling pathway has been identified as a DNA‐sensing pathway that activates interferons in response to viral infection and, thus, mediates host defense against viruses. Previous studies have identified oncogenes E7 and E1A of the DNA tumor viruses, human papillomavirus 18 (HPV18) and adenovirus, respectively, as inhibitors of the cGAS‐STING pathway. However, the function of STING in infected cells and the mechanism by which HPV18 E7 antagonizes STING‐induced Interferon beta production remain unknown. We report that HPV18 E7 selectively antagonizes STING‐triggered nuclear factor kappa‐light‐chain‐enhancer of activated B cells (NF‐κB) activation but not IRF3 activation. HPV18 E7 binds to STING in a region critical for NF‐κB activation and blocks the nuclear accumulation of p65. Moreover, E7 inhibition of STING‐triggered NF‐κB activation is related to HPV pathogenicity but not E7–Rb binding. HPV18 E7, severe acute respiratory syndrome coronavirus‐2 open reading frame 3a, human immunodeficiency virus‐2 viral protein X, and Kaposi's sarcoma‐associated herpesvirus KSHV viral interferon regulatory factor 1 selectively inhibited STING‐triggered NF‐κB or IRF3 activation, suggesting a convergent evolution among these viruses toward antagonizing host innate immunity. Collectively, selective suppression of the cGAS‐STING pathway by viral proteins is likely to be a key pathogenic determinant, making it a promising target for treating oncogenic virus‐induced tumor diseases.
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