建立具有复制能力的膀性口腔炎病毒,复制SADS-CoV的入口
Zihui Zhu1, Yutong Han2, Mingli Gong1
1Center for Infectious Disease Research, School of Medicine, Tsinghua University, Beijing, China.
Journal of virology
|April 1, 2024
概括
研究人员设计了一种新型囊性口腔炎病毒 (VSV) 载体,携带猪急性腹综合征冠状病毒 (SADS-CoV) 尖端蛋白. 该工具有助于研究SADS-CoV的入侵,并开发针对这种动物感染威胁的潜在疫苗.
科学领域:
- 病毒学 病毒学
- 疫苗学 疫苗学 疫苗学
- 分子生物学分子生物学
背景情况:
- 动物性冠状病毒,包括猪急性腹综合征冠状病毒 (SADS-CoV),对人类和动物健康存在持续风险.
- 在人类细胞系中,SADS-CoV已经证明了感染力,这表明了潜在的动物传播.
- 对于研究SADS-CoV入侵和开发疫苗或抗病毒药物等对策的工具有限.
研究的目的:
- 为研究SADS-CoV病毒入口设计一个安全有效的工具.
- 开发一种潜在的针对SADS-CoV的疫苗候选者,使用复合囊膜口腔炎病毒 (VSV) 载体.
- 调查TMPRSS2在SADS-CoV尖端介导细胞进入中的作用.
主要方法:
- 设计了一种具有复制能力的重组VSV (rVSV),表达SADS-CoV尖端 (S) 蛋白和一个金星记者.
- 通过序列通道优化了rVSV-SADS S病毒,识别了S蛋白的细胞质尾部 (rVSV-Venus-SADS SΔ11) 中的11-氨基酸切断,以增强传播.
- 评估免疫子和小鼠血清的病毒中和,并评估TMPRSS2在病毒进入中的作用.
主要成果:
- 成功生成了rVSV-Venus-SADS SΔ11,一个显示SADS-CoV S蛋白的修饰VSV载体.
- 优化的S蛋白切断增强了病毒的传播和细胞膜的定.
- 工程病毒易于通过免疫动物的抗体中和,并证实TMPRSS2促进SADS-CoV尖端介导的入口.
- 用rVSV-Venus-SADS SΔ11对小鼠进行首次增强免疫,产生了针对SADS-CoV.的强效中和抗体.
结论:
- 开发了一种基于rVSV的安全和实用的工具,用于研究SADS-CoV的进入机制.
- 证明了这种rVSV载体的潜力,作为开发SADS-CoV疫苗的平台.
- 突出了TMPRSS2在SADS-CoV感染中的重要性,并为未来对SADS-CoV和相关动物性病毒的研究提供了有价值的模型.
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