抑制I型干扰素信号传递是玛疹病毒编码的微RNA的保留功能
Devin N Fachko1, Yan Chen1, Nikita S Ivanov1
1Vaccine and Gene Therapy Institute, Beaverton, Oregon, USA.
Journal of virology
|December 31, 2025
概括
非人类灵长类动物的玛疹病毒使用microRNA来抑制I型干扰素反应,这是一个保存的免疫逃避策略. 这些病毒miRNAs向关键信号分子,帮助长期的病毒持久性.
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:
- 疹病毒通过解除天生的免疫信号来逃避宿主免疫力.
- 来自埃普斯坦-巴尔病毒 (EBV) 和卡波西肉瘤相关性疹病毒 (KSHV) 的病毒微RNA (miRNA) 抑制了I型干扰素 (IFN) 反应.
- 微RNAs在相关非人类灵长类 (NHP) 马疹病毒的免疫逃避中的作用在很大程度上是未知的.
研究的目的:
- 调查NHP马疹病毒是否利用miRNA介导的策略来调节I型IFN反应.
- 识别特定的病毒miRNA及其参与IFN通路调节的点.
主要方法:
- 功能性查NHP马-疹病毒miRNAs对它们对I型IFN信号传输的影响.
- 主细胞感染miRNA缺少病毒以评估ISG表达.
- 序列分析和记者测定用于识别miRNA目标.
- 在NHP病毒中取消特定的病毒miRNA同类物 (EBV BART).
主要成果:
- 确定了多个NHP马疹病毒miRNAs,可以减弱I型IFN介导的记者激活和ISG表达.
- 在 rhesus 淋巴结核病毒 (rLCV) 中删除miRNA导致ISG表达的增加.
- 从rLCV中去除EBV BART miRNA同类物,增加了受感染细胞对I型IFN的敏感性.
- 确定的目标包括I型IFN受体 (IFNAR1,IFNAR2) 和JAK/STAT通路组件 (JAK1,IRF9).
结论:
- 抑制I型IFN反应是NHP马-疹病毒miRNAs的保留功能.
- 通过准I型IFN信号通路,NHP马疹病毒miRNAs有助于病毒的持续性.
- 提供了关于这些病毒miRNAs如何调节先天抗病毒免疫力的机械洞察力.
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