在SARS-CoV-2感染中,RNA编辑调节宿主免疫反应和T细胞稳态
Molly Huang1,2, Adam Mark3, Jessica Pham4
1Department of Obstetrics, Gynecology & Reproductive Sciences, University of California San Diego, La Jolla, California, United States of America.
PloS one
|August 23, 2024
概括
通过ADAR1编辑氨酸到氨酸 (A-to-I) 的RNA有助于控制SARS-CoV-2. 高RNA编辑水平与较低的病毒载量相关,这表明ADAR1抑制感染并保持T细胞健康.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- 主要由ADAR1调节的腺酸到氨酸 (A-to-I) RNA编辑对于免疫调节和抗病毒防御至关重要.
- 病毒RNA激活ADAR1影响宿主免疫反应,并与严重的COVID-19病原发生有新兴联系.
研究的目的:
- 研究ADAR1介导的A-to-IRNA编辑在SARS-CoV-2感染中的作用.
- 为了探索RNA编辑水平和COVID-19患者的病毒载荷之间的关联.
- 在SARS-CoV-2感染期间检查T细胞中的ADAR1表达和功能.
主要方法:
- 从SARS-CoV-2感染者和对照个体的鼻口腔擦拭物中分析整个转录组数据.
- 差异基因表达分析专注于RNA修饰和干扰素反应途径.
- 单细胞RNA测序以评估感染样本的免疫细胞中的ADAR1表达.
- 在体外实验涉及ADAR1在T细胞中被击倒的实验.
主要成果:
- 在人类转录组数据中发现了A-to-IRNA编辑事件.
- 宿主细胞中较高的RNA编辑水平与较低的SARS-CoV-2病毒载量显著相关 (p = 9.27 E-06).
- 细胞毒性CD8T细胞在COVID-19阳性样本中调高ADAR1 (p = 0.0269),在T细胞激活时表达增加.
- 导致ADAR1倒退导致T细胞亡和异常的IL-2分泌.
结论:
- 由ADAR1编辑的A-to-IRNA对SARS-CoV-2感染起着保护作用,其与病毒载荷的反相关性表明.
- 在COVID-19期间,ADAR1在激活的T细胞,特别是CD8T细胞中被上调.
- 适当的ADAR1功能对于维持T细胞平衡和功能至关重要,这对于对抗SARS-CoV-2感染至关重要.
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