TRIM38诱导在感染呼吸道同胞细胞病毒的细胞下调I型干扰素表达通过与TRIM25竞争,以结合RIG-I
Qingqing Sun1,2, Xiao Han1,3, Lingtong Meng1
1Department of Immunology, Key Laboratory of Immune Mechanism and Intervention on Serious Disease in Hebei Province, Hebei Medical University, Shijiazhuang, Hebei, China.
Inflammation
|April 17, 2024
概括
呼吸道同胞细胞病毒 (RSV) 感染上调TRIM25,激活RIG-I用于I型干扰素 (IFN-I) 生产. 然后TRIM38通过对抗TRIM25与RIG-I结合来抑制IFN-I,从而创建一个负反循环.
科学领域:
- * 病毒学 病毒学
- * 免疫学 免疫学
- * 分子生物学 * 分子生物学
背景情况:
- *天生的免疫力对宿主防御病毒感染至关重要.
- * I型干扰素 (IFN-I) 是抗病毒反应的关键媒介.
- *TRIM家族蛋白质在调节免疫信号通路方面发挥着重要作用.
研究的目的:
- * 调查TRIM25和TRIM38在RSV感染期间调节IFN-I产生的作用.
- *阐明TRIM25和TRIM38与RIG-I相互作用的分子机制.
- * 了解TRIM25和TRIM38在控制宿主抗病毒反应中的相互作用.
主要方法:
- *分析了RSV感染的呼吸道上皮细胞中TRIM25和TRIM38的表达.
- *共免疫沉试验评估TRIM25和TRIM38与RIG-I.I.结合的情况.
- * 随处化试验以确定所涉及的随处化类型 (K63和K48).
- *报告者测试测量IFN-I产生和NF-κB通路激活.
主要成果:
- *RSV感染诱导TRIM25表达,该表达通过K63-连接的泛素化激活RIG-I,从而通过NF-κB通路产生IFN-I.
- *IFN-I促进TRIM38表达,该表达通过通过K48链接的无化来降低RIG-I蛋白水平来降低IFN-I.
- *TRIM38与TRIM25竞争RIG-I结合,TRIM38结合到一个更广泛的区域,包括TRIM25结合站点.
- *TRIM25通过K63-链接的无处不在结合,在第一个CARD域的K-45结合RIG-I.
结论:
- *TRIM25和TRIM38在调节IFN-I生产方面表现出对抗性的关系.
- *TRIM38通过与TRIM25竞争来负面调节RIG-I激活,从而抑制宿主抗病毒反应.
- *一个涉及TRIM38和TRIM25的负反循环控制IFN-I水平,防止免疫反应过度激活.
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