宿主RNA酸酶DUSP11的病毒盗版是由鸟病毒的病毒盗版
Kayla H Szymanik1, Emily A Rex2, Vamshikrishna R Pothireddy1
1Department of Molecular Biosciences, The University of Texas at Austin, Austin, Texas, United States of America.
PLoS pathogens
|April 21, 2025
概括
飞病毒编码病毒DUSP11 (vDUSP11) 同类物,模仿宿主DUSP11的功能. 这种病毒酶降低了RNA三酸酶的活性,抑制了RIG-I介导的先天免疫激活,并恢复了病毒感染.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 天生的免疫依赖于通过5'pppRNA.RNA等分子信号识别病毒病原体.
- RNA传感器RIG-I检测到5'pppRNA,从而启动抗病毒反应.
- 内源RNA聚合酶III (RNAPIII) 转录可以触发自身免疫反应,如果它们保留5'ppp.
研究的目的:
- 研究宿主双特异性酸酶11 (DUSP11) 在调节对RNA的先天免疫反应中的作用.
- 在鸟病毒中识别和描述DUSP11 (vDUSP11s) 的病毒同类物.
- 了解VDUSP11s如何影响RNA代谢和病毒感染.
主要方法:
- 对病毒基因组进行分析,以确定DUSP11同源.
- 在宿主细胞中vDUSP11s的表达.
- 内源性RNAPIII转录的量化.
- 对5'pppRNA介导的免疫激活的细胞敏感性的评估.
- 在DUSP11活性存在或不存在的情况下对病毒感染的评估.
主要成果:
- 在鸟病毒中发现了病毒DUSP11同类物 (vDUSP11s).
- vDUSP11表达减少了内源RNAPIII转录的水平.
- vDUSP11表达降低了细胞对5'pppRNA诱导的免疫激活的敏感性.
- 在DUSP11缺乏的环境中观察到的vDUSP11表达恢复了病毒感染缺陷.
结论:
- 鸟病毒已经进化了vDUSP11s来操纵宿主RNA代谢.
- vDUSP11s作为RNA三酸酶,抑制RIG-I介导的天生的免疫力.
- 这种病毒策略可以通过逃避宿主防御来实现有效的病毒复制.
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