干扰素刺激的cirHOMER1减弱了抗病毒天生的免疫力
Ao Zhang1, Ranran Yao1, Shijin Geng1
1Department of Immunology, School of Basic Medical Sciences, NHC Key Laboratory of Medical Immunology, Medicine Innovation Center for Fundamental Research on Major Immunology-related Diseases, Peking University, Beijing, China.
mBio
|July 15, 2025
概括
循环RNA circHOMER1通过抑制I型干扰素信号传递和促进病毒复制来抑制抗病毒免疫力. 这种新发现的干扰素刺激的circRNA在维持免疫平衡中起着至关重要的作用,可能是病毒感染的治疗点.
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:
- 循环RNAs (circRNAs) 越来越多地被认为是它们在各种生物过程中的角色.
- 鉴定出circHOMER1,一种在大脑中丰富的circRNA,在病毒感染和干扰素刺激时被上调.
- 它在免疫系统中的功能,特别是抗病毒天生的免疫力,以前是未知的.
研究的目的:
- 为了研究circHOMER1在抗病毒天生的免疫力中的作用.
- 阐明circHOMER1调节I型干扰素信号通路的分子机制.
- 评估circHOMER1作为病毒感染治疗点的潜力.
主要方法:
- 循环RNA微阵列查以识别差异表达的循环RNAs.
- 过度表达和敲击实验来评估circHOMER1的功能.
- 机制研究涉及竞争性内源性RNA (ceRNA) 测定,西部抹杀和RNA免疫沉.
- 使用小鼠感染模型的体内研究.
主要成果:
- 循环HOMER1的表达被各种病毒和I型干扰素上调.
- 过度表达circHOMER1抑制病毒诱导的I型干扰素信号传递,并增强病毒复制.
- 环HOMER1作为miR-145-3p的ceRNA,对OTUD7B和IRF3的表达产生负调节.
- circHOMER1 干扰了 RIG-I/G3BP1 相互作用,损害了病毒RNA 的检测.
- circHOMER1在小鼠模型中表现出免疫抑制作用.
结论:
- circHOMER1是一种新的干扰素刺激的circRNA,可以负面调节抗病毒先天免疫力.
- circHOMER1通过ceRNA活动调节I型干扰素信号传递,并通过干扰病毒RNA传感而起作用.
- circHOMER1对于免疫恒温是必不可少的,并且代表了病毒感染和自身免疫性疾病的潜在治疗标.
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