亚基因组黄病毒RNA通过与siRNA竞争,以结合RISC组件来抑制RNA干扰
Xiang Chen1, Rui-Ting Li1, Ru-Yi Chen1
1Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China.
Journal of virology
|January 30, 2024
概括
寨卡病毒 (ZIKV) 亚基因组RNA (sfRNA) 在人类神经前代细胞中产生,并通过结合关键RNAi蛋白质来抑制抗病毒RNA干扰 (RNAi). 这种sfRNA作为RNAi的病毒抑制剂,影响发育中的大脑中ZIKV感染.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 寨卡病毒 (ZIKV) 感染人类神经前体细胞 (hNPC),对大脑发育至关重要.
- 抗病毒RNA干扰 (RNAi) 是hNPCs对ZIKV的关键防御机制.
- ZIKV编码病毒蛋白来对抗宿主RNAi,但病毒RNA在这个过程中的作用尚不清楚.
研究的目的:
- 研究ZIKV亚基因组RNA (sfRNA) 在受感染的hNPCs中的产生和功能.
- 为了确定ZIKV sfRNA是否对hNPCs中的宿主RNAi通路产生对抗作用.
- 确定涉及RNAi抑制的特定ZIKV sfRNA元素及其作用机制.
主要方法:
- 在ZIKV感染的hNPC中检测和描述sfRNA.
- 与质谱学相结合的RNA拉回测定用于识别sfRNA相互作用的主体蛋白.
- 功能性测试评估sfRNA抑制RNAi和增强病毒复制的能力.
主要成果:
- 丰富的ZIKV sfRNA在受感染的hNPCs中产生.
- ZIKV sfRNA与RNA诱导沉默复合体 (RISC) 组件RHA和PACT直接相互作用.
- ZIKV sfRNA通过超越小干扰RNA (siRNAs) 来与RHA和PACT结合来对抗RNAi,而3'干环 (3'SL) 对这种相互作用和功能至关重要.
结论:
- 在hNPCs中,ZIKV sfRNA 功能作为一种强大的RNAi (VSR) 病毒抑制剂.
- ZIKV sfRNA的3'SL是flaviviruses中保存的RNA元素,它调解与RISC组件的相互作用,并抑制RNAi.
- 像sfRNA这样的病毒非编码RNA,代表了flaviviruses对抗宿主抗病毒免疫力的重要机制.
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