口疫病毒VP1通过自降解YTHDF2,以调节病毒复制的IRF3活动
Huisheng Liu1, Qiao Xue1, Fan Yang1
1State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.
Autophagy
|March 22, 2024
概括
口病病毒 (FMDV) 使用其VP1蛋白来增加GTPBP4水平,抑制先天免疫反应并促进病毒复制. 降低GTPBP4可以增强对FMDV的抗病毒免疫力.
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:
- 病毒,包括FMDV,利用宿主自来降解蛋白质并增强复制.
- 在FMDV感染期间,自和先天免疫之间的相互作用仍然不完全理解.
- 主体GTP结合蛋白4 (GTPBP4) 作为天生的免疫反应的负调节剂.
研究的目的:
- 阐明在FMDV感染期间天生的免疫反应中自的调节机制.
- 研究GTPBP4在FMDV复制和宿主抗病毒防御中的作用.
- 确定FMDV如何对抗宿主抗病毒免疫力.
主要方法:
- 使用GTPBP4缺陷模型研究了GTPBP4在FMDV复制和先天免疫中的作用.
- 分析了FMDV VP1蛋白与自途径的相互作用及其对GTPBP4表达的影响.
- 利用自抑制剂和分子技术研究涉及YTHDF2降解的AKT-MTOR依赖途径.
主要成果:
- 缺乏GTPBP4会增强抗病毒的先天免疫反应,并赋予对FMDV的抵抗力.
- FMDV VP1蛋白通过一种依赖AKT-MTOR的自路径调节GTPBP4的表达,降低YTHDF2.
- 升高的GTPBP4抑制IRF3与IFN-β促进体结合,抑制I型干扰素的产生.
结论:
- FMDV VP1通过劫持自来增加GTPBP4表达来负面调节天生的免疫力.
- 这种机制抑制了I型干扰素的产生,促进了病毒复制.
- 这项研究揭示了一种新的FMDV免疫逃避策略,涉及GTPBP4和YTHDF2.
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