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人类常见的APOE基因变异影响小鼠COVID-19死亡率
Benjamin N Ostendorf1,2,3,4, Mira A Patel5, Jana Bilanovic5
1Laboratory of Systems Cancer Biology, The Rockefeller University, New York, NY, USA. bostendorf@rockefeller.edu.
Nature
|September 21, 2022
概括
阿波脂蛋白E (APOE) 基因变异影响COVID-19的严重程度. 在小鼠和人类中,APOE2和APOE4等位基因与更糟糕的结果,病毒载量增加和免疫反应受损有关.
科学领域:
- 遗传学
- 免疫学
- 病毒学
背景情况:
- COVID-19 的结果各不相同,从无症状到致命.
- 人们怀疑遗传因素有助于这种异质性,但机制尚不清楚.
- 已知APOE基因变异是阿尔茨海默氏症和动脉样硬化的危险因素.
研究的目的:
- 研究阿波利波蛋白E (APOE) 基因变异在COVID-19结果中的作用.
- 探索APOE变种对病毒感染和免疫反应的影响.
主要方法:
- 使用SARS-CoV-2感染的小鼠模型.
- 在具有不同APOE等位基因 (APOE2,APOE3,APOE4) 的小鼠中比较疾病进展,病毒载荷和免疫反应.
- 进行体外测定以评估病毒感染率.
- 在英国COVID-19患者的生物库中分析了APOE基因型与生存的关联.
主要成果:
- 与APOE3相比,APOE2和APOE4变种导致COVID-19的进展更严重,小鼠的生存率更差.
- 患有APOE2/ APOE4的小鼠在感染初期呈现较高的病毒载荷和抑制的适应性免疫力.
- 在体外研究证实了APOE2和APOE4的SARS-CoV-2感染增加.
- 在感染SARS-CoV-2的人类患者中,APOE基因型与生存显著相关.
结论:
- APOE基因型在确定COVID-19的严重程度方面发挥着作用.
- APOE变种对病毒感染和免疫力的差异影响有助于结果的异质性.
- APOE基因定型可能有助于识别患重症COVID-19的风险较高的人.
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