长期的SARS-CoV-2的连续传递揭示了融合进化的迹象
Charles S P Foster1,2, Gregory J Walker1,2, Tyra Jean1,2
1Serology and Virology Division (SAViD), NSW Health Pathology, Prince of Wales Hospital, Sydney, New South Wales, Australia.
Journal of virology
|June 9, 2025
概括
在试验室中对严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 的连续传递揭示了一致的突变积累和融合进化. 这些发现有助于预测未来的病毒轨迹,并为针对不断发展的冠状病毒的公共卫生策略提供信息.
科学领域:
- 病毒学和进化生物学
- 基因组学和生物信息学
- 公共卫生和流行病学
背景情况:
- 病毒进化对于流行病的应对,预测和监测至关重要.
- SARS-CoV-2 的全基因组测序 (WGS) 有助于研究人类人口演变.
- 在体外序列传递提供了一个受控的环境来研究病毒适应.
研究的目的:
- 为了研究SARS-CoV-2的进化动态,并在广泛的体外序列传递过程中确定关键突变.
- 将体外进化与同时临床序列进行比较,并了解突变出现机制.
- 为尽量减少SARS-CoV-2感染影响的公共卫生策略提供信息.
主要方法:
- 在Vero E6细胞中连续传递9个SARS-CoV-2系 (包括关注的变种) 通过≥33个通道 (33-100).
- 全基因组测序 (WGS) 用于分析病毒的进化动态和识别突变.
- 对体外突变与临床序列进行比较分析,以确定融合进化.
主要成果:
- 在串行传递过程中,SARS-CoV-2经常积累突变,其中一些低频变体丢失,而另一些变体则变为固定的.
- 在不同的通道线和临床序列中观察到融合突变,包括那些可能导致免疫逃避的突变 (例如,S:A67V,S:H655Y).
- 关键突变可以在体外发生融合,表明超出宿主免疫反应的机制,可能是由于体外益处或随机事件.
结论:
- 广泛的SARS-CoV-2体外序列传递表明了显著的进化动态和突变积累.
- 特定突变的融合进化在体外反映了临床环境中的发现,突出了潜在的健康优势.
- 该研究提供了对SARS-CoV-2演变的定量见解,为预测模型和公共卫生干预提供了信息.
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