针对SARS-CoV-2突起的细胞类型特定适应
Marc Carrascosa-Sàez1, María-Carmen Marqués1, Ron Geller1,2
1Institute for Integrative Systems Biology (I2SysBio). University of Valencia-CSIC, Paterna, 46980, Spain.
Virus evolution
|May 23, 2024
概括
严重急性呼吸道综合征冠状病毒-2 (SARS-CoV-2) 尖端蛋白适应不同细胞类型,改变病毒的进入和适应性. 特定突变在低血管酶转化酶-2 (ACE2) 环境中增强感染力,影响病毒热带性.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 严重急性呼吸道综合征冠状病毒-2 (SARS-CoV-2) 感染了各种人体组织,主要是通过血管素转化酶-2 (ACE2) 受体相互作用.
- 了解SARS-CoV-2在各种细胞环境中的演变对于预测病毒热带性和病原性至关重要.
研究的目的:
- 在不同的细胞环境中研究SARS-CoV-2尖端蛋白的适应性进化.
- 为了识别赋予细胞类型特异性表型变化的突变,并评估它们对病毒进入和适应性的影响.
主要方法:
- 在四个具有不同入口因子水平的人类细胞系中,一个尖端表达的复合囊泡性口腔炎病毒 (VSV) 的实验进化.
- 测序以确定20个通道后的适应性尖端突变.
- VSV伪型化测试用于评估进入效率,ACE2亲和力,尖端处理,TMPRSS2使用和进入通路利用.
- 细胞-细胞融合试验,以评估尖端的融合性.
- 重组VSV适应性测试,以确定所选突变的优势.
主要成果:
- 确定了16种适应性尖端突变,对病毒进入和复制性适应性表现出细胞类型特异性影响.
- 突变L48S和A372T,在低ACE2条件下进行选择,增强受体亲和力,合成细胞形成和进入效率.
- 突变的影响在不同细胞类型之间有很大差异,突出显示了细胞上下文依赖的适应性.
结论:
- SARS-CoV-2 尖端蛋白显示出对不同宿主细胞类型的特定适应能力.
- 这些发现为SARS-CoV-2组织热带性,病毒进化和适应多种细胞环境的潜在机制提供了洞察力.
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