从负链RNA病毒的终端管结构产生的小干扰RNAs促进病毒感染
Wan Zhao1,2, Qiong Li1, Mengqi Sun1
1State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
PLoS pathogens
|January 3, 2025
概括
来自大米条纹病毒 (RSV) 的病毒衍生小干扰RNA (vsiRNA) 通过抑制昆虫免疫力并帮助大米植物的复制促进病毒感染. 这揭示了 vsiRNAs 在增强病毒病变发生过程中的新作用.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 病毒衍生的小干扰RNAs (vsiRNAs) 已知具有抗病毒免疫力.
- vsiRNAs在病毒感染中的潜在积极作用在很大程度上仍未被探索.
研究的目的:
- 研究源自大米条纹病毒 (RSV) 基因组末端的 vsiRNAs 的功能.
- 为了确定vsiRNAs是否可以促进病毒感染.
主要方法:
- 来自RSV基因组末的三个丰富的 vsiRNAs 的表征.
- 对依赖昆虫Dicer1和Dicer2的 vsiRNA生成的分析.
- 对病毒RNA和宿主基因 (DOPA脱碳酶) 的 vsiRNA向评估.
- 在VsiRNA沉默转基因大米中评估病毒标位.
主要成果:
- 确定了三种丰富的 vsiRNAs,它们起源于保存的RSV基因组末端,并且依赖于昆虫的Dicer酶.
- 这些vsiRNAs向病毒RNAs,并通过降低DOPA脱碳酶的调节来抑制昆虫氧化酶免疫反应.
- 在转基因大米中抑制这些 vsiRNAs 显著降低了病毒标位,表明它们促进RSV复制.
结论:
- 源自负链RNA病毒保留的手柄结构的 vsiRNAs 在增强病毒感染方面具有独特的功能.
- 这些 vsiRNAs通过向病毒RNA和调节昆虫免疫来促进病毒传播而双重作用.
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