转录基因洞察野生类型小鼠的免疫动态,这些小鼠受到SARS-CoV-2Beta变体的挑战
Hamid Reza Jahantigh1, Amany Elsharkawy1,2, Komal Arora1
1Department of Biology, College of Arts and Sciences, Georgia State University, Atlanta, GA, USA.
Laboratory animal research
|January 29, 2026
概括
这种SARS-CoV-2的Beta变体感染了野生型小鼠,揭示了关键的肺基因表达变化. 这项研究确定了像亡和细胞因子反应这样的上调的途径,为病毒病原体提供了洞察力.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
背景情况:
- 由于ACE2受体不相容,野生型小鼠对祖先的SARS-CoV-2菌株没有敏感性.
- 在SARS-CoV-2的Beta变体可以有效地感染野生类型的小鼠.
- 以前的研究表明,转基因小鼠的SARS-CoV-2感染可以导致致命的脑炎.
研究的目的:
- 为了研究感染SARS-CoV-2Beta变体的野生类型小鼠肺部的转录基因格局.
- 识别差异表达基因 (DEG) 和参与宿主反应的关键途径.
- 通过RT-qPCR和多重检测验证RNA测序发现.
主要方法:
- 野生型C57BL/6J小鼠被内鼻感染了SARS-CoV-2Beta变种 (B.1.351菌株).
- 感染后3天和6天收集肺组织进行RNA测序.
- 使用Limma-Voom和fgsea包进行了差异基因表达,通路丰富和网络分析.
主要成果:
- 在感染后的第3天发现了285个DEG,在感染后的第6天发现了46个DEG.
- 上调的途径包括细胞亡和细胞因子反应.
- 确定了关键向基因 (Kif11,Ccna2,Aurkb) 和枢纽基因,通过RT-qPCR验证,并增加了炎症媒介蛋白.
结论:
- 这是首次对感染了临床SARS-CoV-2分离物的野生型老鼠肺部进行转录组分析.
- 这些发现增强了对SARS-CoV-2小鼠模型中病原性事件的理解.
- 这项研究强调了野生类型小鼠对研究SARS-CoV-2Beta变种感染动态的有用性.
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