SARS-CoV-2 进化的特征反映了人类肠道内的选择性压力
Anton Zhiyanov1, Maxim Shkurnikov1, Ashot Nersisyan1
1Faculty of Biology and Biotechnology, HSE University, Moscow, Russia.
Journal of medical virology
|July 29, 2023
概括
主体微RNAs (miRNAs) 与严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 相互作用. 迷RNA结合部位的丧失,特别是在NSP4区域,影响了病毒的进化和Omicron变异的兴起.
科学领域:
- 病毒学 病毒学
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 微RNA (miRNA) 是小型非编码RNA,通过与信使RNA (mRNA) 结合来调节基因表达.
- 在体细胞中,宿主miRNAs可以与病毒基因组相互作用,影响病毒复制和翻译.
- 严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 已经迅速演变,随着时间的推移,出现了不同的血统.
研究的目的:
- 研究宿主组织特异性miRNA结合在SARS-CoV-2进化中的作用.
- 分析miRNA结合部位动态对病毒基因组适应的影响.
- 了解塑造SARS-CoV-2血统的选择性压力,包括Omicron.
主要方法:
- 在GISAID数据库中分析伦敦和柏林样本中的SARS-CoV-2基因组序列.
- 病毒系的分类为"祖先变异"和"Omicrons".
- 在SARS-CoV-2基因组内的miRNA结合部位的基分析,重点是NSP4区域.
主要成果:
- 在SARS-CoV-2基因组的NSP4区域中发现了大量的miRNA结合部位.
- 观察到人类肠道miRNAs对NSP4区域的进化压力的证据.
- 在三年病毒演化过程中检测到miRNA结合部位的普遍丧失,特别是在NSP4中.
- 这种结合点的丧失与Omicron亚系的出现和主导相关,特别是BA.2后裔.
结论:
- 主体miRNA结合,特别是NSP4区域,在塑造SARS-CoV-2演变中发挥了重要作用.
- 观察到miRNA结合部位的损失促进了Omicron变异的适应和主导.
- 了解这些宿主病毒相互作用,可以深入了解病毒演变和流行病动态.
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