通过RNA病毒激活和逃避FEAR途径
Emily A Rex1, Dahee Seo1, Aaron Embry1
1Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA.
bioRxiv : the preprint server for biology
|March 10, 2025
概括
该FACT-ETS-1抗病毒反应 (FEAR) 途径限制了DNA和RNA病毒. 病毒使用各种策略来规避这种途径,通过向SUMOylated hSpt16蛋白质来规避这种途径,突出 FEAR.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- FACT-ETS-1抗病毒反应 (FEAR) 途径是一种干扰素独立的先天免疫机制,限制了DNA病毒的复制.
- 毒杆病毒对A51R蛋白进行编码,通过将SUMOylated hSpt16与微管结合,从而阻碍ETS-1的表达,从而对FEAR途径产生对抗作用.
- 目前尚不清楚RNA病毒是否与FEAR路径相互作用以及它们如何抵消它.
研究的目的:
- 为了研究RNA病毒与FEAR路径的相互作用.
- 确定病毒机制来对抗RNA病毒中的FEAR路径.
- 探索FEAR路径调制的治疗潜力及其在病毒宿主范围中的作用.
主要方法:
- 在人类和昆虫细胞模型中利用了囊泡性口腔炎病毒 (VSV) 和帕拉米克索病毒.
- 使用具有缺陷矩阵 (M) 或辅助"C"蛋白的突变病毒菌株.
- 评估病毒复制,蛋白质降解,核进口和宿主范围的决定因素.
主要成果:
- 包括VSV和paramyxoviruses在内的RNA病毒受到FEAR路径的限制.
- VSV M 蛋白降解 SUMOylated hSpt16 并阻止 ETS-1 核导入; FACT 抑制增强了瘤性 VSV 复制.
- VSV-Spt16的相互作用影响宿主范围,对抗性受损导致昆虫细胞中流产性感染;paramyxoviruses使用保留的动机来降解SUMOylated Spt16.
结论:
- 病毒,无论是DNA还是RNA,都独立进化了各种机制来对抗SUMOylated宿主Spt16蛋白质.
- 恐惧路径是对广泛病毒的抗病毒免疫的关键组成部分.
- 针对FEAR途径有潜力改善菌性病毒疗法和了解病毒与宿主相互作用.
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