RNF144B通过向MDA5进行自性降解来负面调节抗病毒免疫力
Guoxiu Li1,2,3, Jing Zhang4,5, Zhixun Zhao1,3
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, 730000, China.
EMBO reports
|September 16, 2024
概括
RNF144B负面调节了对病毒的天生的免疫反应. 它针对MDA5进行降解,增强感染EMCV的小鼠的存活率.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- MDA5是一种RIG-I类受体,对于感知双链RNA和启动抗病毒I型干扰素反应至关重要.
- 失调MDA5信号传递可能会影响先天性免疫力和病毒病原性.
研究的目的:
- 研究RNF144B在MDA5介导的先天抗病毒免疫的调节中的作用.
- 阐明RNF144B影响MDA5功能和稳定的分子机制.
主要方法:
- 同免疫沉降试验证实了RNF144B-MDA5相互作用.
- 在MDA5.5上进行ubiquitination测试以确定ubiquitination位点和链接类型.
- 西部涂抹和免疫光检测以评估MDA5蛋白水平和局部化.
- 自试验评估p62在MDA5降解中的作用.
- 使用Rnf144b淘汰赛小鼠和EMCV感染模型进行体内研究,以评估抗病毒反应和生存率.
主要成果:
- 特别是RNF144B与MDA5.5进行相互作用.
- 在Lys23和Lys43.3,RNF144B促进了MDA5的K27/K33结合的多比基化.
- RNF144B促进了MDA5.5的p62-介导的自降解.
- 缺少Rnf144b会增强I型干扰素的产生,并抑制体内EMCV的复制.
- Rnf144b淘汰赛小鼠在EMCV感染后的生存率增加.
结论:
- RNF144B作为先天抗病毒免疫反应的负调节剂.
- RNF144B针对MDA5的CARD,促进其自降解.
- 抑制RNF144B可以增强抗病毒免疫力,并改善病毒感染期间的存活率.
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