在小鼠中枢神经系统中SARS-CoV-2的演变推动了病毒多样化
Jacob Class1, Lacy M Simons2,3, Ramon Lorenzo-Redondo2,3
1Department of Microbiology and Immunology, College of Medicine, University of Illinois Chicago, Chicago, IL, USA.
Nature microbiology
|August 23, 2024
概括
在SARS-CoV-2尖端蛋白的furin分裂部位 (FCS) 对于神经侵袭和病毒在中枢神经系统 (CNS) 和肺部之间传播至关重要. 删除FCS可以减少SARS-CoV-2的毒性和细分.
科学领域:
- 病毒学 病毒学
- 神经科学是一个神经科学.
- 传染性疾病 传染性疾病
背景情况:
- 神经系统并发症与2019年严重的冠状病毒病 (COVID-19) 和SARS-CoV-2感染的后急性后果有关.
- 驱动SARS-CoV-2神经入侵及其在中枢神经系统 (CNS) 内的演变的机制仍然不清楚.
研究的目的:
- 为了研究控制SARS-CoV-2神经侵入的进化压力.
- 为了比较肺部的病毒进化与受感染小鼠的中枢神经系统.
主要方法:
- 小鼠被内鼻接种了野生型的SARS-CoV-2或一种缺乏尖峰裂部位 (FCS) 的变种.
- 在肺部和中枢神经系统中评估了病毒分歧,标位和发病率.
- 内注射用于评估FCS在中枢神经系统到肺部传播中的作用.
主要成果:
- 与肺相比,SARS-CoV-2在中枢神经系统中表现出更高的遗传分歧,在FCS中经常发生突变.
- 删除FCS显著减弱病毒毒性,减少病毒标位和鼻内感染后的发病率.
- 被FCS删除的病毒在直接内注射后恢复了毒性.
- 完整的FCS是病毒从中枢神经系统传播到肺部所必需的.
结论:
- 尖峰素裂解部位 (FCS) 在SARS-CoV-2的热带和中枢神经系统和肺部之间的分隔中发挥着关键作用.
- 了解FCS的作用对于解决与SARS-CoV-2感染相关的神经并发症至关重要.
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