核RPSA感知病毒核酸,以促进先天的炎症反应
Yan Jiang1, Siqi Sun1, Yuan Quan1
1Department of Immunology, Center for Immunotherapy, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China.
Nature communications
|December 19, 2023
概括
研究人员发现40S核糖体蛋白SA (RPSA) 作为核传感器,在病毒感染期间触发促炎细胞因子. 骨髓细胞中的RPSA缺乏减少了对HSV-1和IAV等核复制病毒的炎症反应.
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:
- 天生的免疫依赖于传感器来检测病毒感染并触发防御机制.
- I型干扰素 (IFN-I) 和促炎细胞因子是抗病毒反应的关键媒介.
- 虽然已知IFN-I的核传感器,但主要诱导益炎性细胞因子的核传感器是不太了解的.
研究的目的:
- 识别涉及先天抗病毒免疫的新型核传感器.
- 阐明已识别的传感器在细胞因子生产中的特定作用.
- 了解病毒核酸核感应的基础分子机制.
主要方法:
- 功能查,以识别识别病毒核酸的核蛋白.
- 产生和分析骨髓细胞特异性Rpsa缺乏的小鼠.
- 使用简单疹病毒-1 (HSV-1) 和流感A病毒 (IAV) 的感染模型.
- 酸化位点分析和蛋白质与蛋白质相互作用研究 (SMARCA5招募).
主要成果:
- 40S核糖体蛋白SA (RPSA) 被确定为病毒核酸的核传感器.
- RPSA主要促进促炎性细胞因子基因表达.
- 骨髓细胞特异性Rpsa缺乏导致减少对HSV-1和IAV的炎症反应.
- 在Tyr204中核RPSA酸化招募SMARCA5,提高NF-κB的染色质可访问性.
结论:
- RPSA作为抗病毒先天免疫的关键核传感器,主要驱动促炎性细胞因子的产生.
- RPSA-SMARCA5-NF-κB轴提供了一种新的核内通路,用于启动炎症反应.
- 这一发现扩大了我们对在宿主防御中对核内复制的病毒的核感应机制的理解.
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