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伪狂犬病病毒IE180的蛋白质将G3BPs劫持到核中,以抑制压力颗粒的形成
Ruihan Zhao1, Zhenbang Zhu1, Wenqiang Wang1
1Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University College of Veterinary Medicine, Yangzhou, China.
Journal of virology
|March 27, 2025
概括
伪狂热病毒 (PRV) 蛋白IE180通过与G3BP蛋白相互作用并将其隔离到核中,从而抑制抗病毒应激颗粒 (SG) 的形成,帮助病毒复制. 这种机制对于PRV免疫逃避至关重要,并且可能与其他alphaherpesvirus共享.
科学领域:
- 病毒学 病毒学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 伪狂热病毒 (PRV) 是一种 alfaherpesvirus,在动物中引起重大疾病.
- 压力颗粒 (SGs) 是细胞结构,通常抑制病毒感染.
- 病毒往往会发展出机制来逃避宿主抗病毒反应,包括SG形成.
研究的目的:
- 为了研究PRV和宿主细胞压力颗粒之间的相互作用.
- 为了阐明PRV直接早期蛋白IE180在SG形成中的作用.
- 了解PRV如何操纵宿主细胞机械进行复制.
主要方法:
- 用不同的PRV菌株感染宿主细胞.
- 同免疫沉测试检测蛋白质相互作用.
- 构建IE180蛋白质的切断和突变.
- G3BP蛋白质淘汰和外源表达研究.
- 显微镜观察SG形成和蛋白质定位.
主要成果:
- 在宿主细胞中,PRV感染会抑制SG的形成.
- PRV IE180 蛋白与 G3BP1/2 相互作用,并定位到核中.
- 结合G3BPs的IE180干扰了SG的形成,尽管细胞质IE180的影响较弱.
- G3BP淘汰赛增强了PRV复制,而SG形成则抑制了它.
结论:
- 通过将G3BP蛋白质劫持到核中,PRV IE180积极抑制SG的形成.
- 这种机制促进了PRV的复制,并代表了一种新的免疫逃避策略.
- 这些发现提供了对alphaherpesvirus病原体和宿主病原体相互作用的见解,对HSV-1等相关病毒有潜在的影响.
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