免疫抑制,先前存在的免疫和突变倾向塑造了SARS-CoV-2在持久感染中的进化
Minghui An1,2, Xiaolong Dong3, Yang Gao3
1State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, NHC Key Laboratory of AIDS Prevention and Treatment, National Clinical Research Center for Laboratory Medicine, The First Hospital of China Medical University, China Medical University, Shenyang 110001, China.
在免疫功能低下的人群中,持续的SARS-CoV-2感染加速了病毒的进化,产生了新型变异. 了解这些进化动态对于公共卫生和针对新兴菌株的疫苗开发至关重要.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 公共卫生 公共卫生
背景情况:
- 持续的SARS-CoV-2感染,特别是在免疫受损的宿主中,充当病毒进化和新变种出现的储.
- 了解病毒进化机制对于开发有效的公共卫生策略和疫苗至关重要,特别是针对弱势群体.
- 长期COVID-19可能与持续感染中的病毒演变有关.
研究的目的:
- 在持久性感染中调查SARS-CoV-2变种的进化和突变概况.
- 为了确定影响宿主内病毒演化速率的因素.
- 评估持续感染可能产生令人担忧或感兴趣的变种的可能性.
主要方法:
- 采用了下一代测序和家族遗传分析.
- 分析了来自5名持久性SARS-CoV-2感染的个体的连续口腔喉拭片样本.
- 在不同的宿主免疫状态中比较了进化模式和突变率.
主要成果:
- 观察到宿主内部进化模式的显著变化.
- 三名免疫功能低下的主体的进化率是其他两名患者的20倍,与免疫抑制和突变程度有关.
- 在尖峰基因中确定了15种宿主内部单核酸变异 (iSNVs),表明融合进化,其中一些突变与关注/感兴趣的变异保持一致.
结论:
- 持久性感染是新型,潜在有害的SARS-CoV-2变种的重要来源.
- 病毒的进化动态受到病毒学,免疫学和遗传因素的复杂相互作用的影响.
- 强调迫切需要对免疫受损宿主进行个性化监测,以防止疫情爆发和研究后果.
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