尤比基因特异蛋白酶5通过去除MAVS和IRF3的尤比基因,促进了EV-A71的复制
Shumin Zhang1, Yuan Fang2, Shuai Ren1
1Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng 475004, China.
Virologica Sinica
|December 6, 2025
概括
人类肠道病毒A71 (EV-A71) 通过升调全素特异蛋白酶5 (USP5) 来逃避免疫反应. 抑制USP5可以增强抗病毒信号传输,为抗手足口病提供新的治疗策略.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 人类肠道病毒A71 (EV-A71) 引起手足口病 (HFMD),对儿童构成重大威胁.
- 线粒体抗病毒信号蛋白 (MAVS) 和干扰素调节因子3 (IRF3) 对抗病毒免疫非常重要.
- 涉及duebiquitinases (DUBs) 的病毒免疫逃避机制尚未完全理解.
研究的目的:
- 调查DUBs的作用,特别是泛素特异蛋白酶5 (USP5) 在EV-A71感染和免疫逃避中的作用.
- 阐明USP5影响抗病毒信号通路的机制.
- 探索USP5作为对EV-A71.1的潜在治疗点.
主要方法:
- 细胞的EV-A71感染和USP5表达的评估.
- 使用siRNA的USP5淘汰实验.
- 同免疫沉以研究蛋白质相互作用.
- 西方涂抹分析蛋白质无化和酸化.
- 用USP5抑制剂PR-619.9进行治疗.
主要成果:
- 在EV-A71感染中,USP5表达得到了上调.
- USP5敲除抑制了EV-A71复制,并增强了I型干扰素 (IFN-I) 和干扰素刺激基因 (ISG) 的产生.
- USP5与MAVS和IRF3相互作用,减少了它们的K63结合的多比基因化,随后是IRF3酸化.
- 此外,USP5还规范了EV-D68和CVA16复制以及IFN-I生产.
- 药理上抑制USP5增强了IFN的抗病毒作用.
结论:
- USP5通过抑制MAVS和IRF3介导的抗病毒信号来促进EV-A71的免疫逃避.
- 针对USP5-IRF3轴为EV-A71和其他潜在的肠道病毒感染提供了一个新的治疗策略.
- USP5是宿主抗病毒对肠道病毒反应的关键调节者.
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