在严重的COVID-19患者中,临时TCR动态和表位元多样性标志着恢复
Kriti Khare1,2, Sunita Yadav1, Sayanti Halder1
1Division of Immunology and Infectious Disease Biology, INtegrative GENomics of HOst-PathogEn (INGEN-HOPE) Laboratory, Council of Scientific and Industrial Research (CSIR)-Institute of Genomics and Integrative Biology (CSIR-IGIB), Delhi, India.
Frontiers in immunology
|July 25, 2025
概括
严重的COVID-19患者表现出扩大T细胞受体多样性和随着时间的推移减少炎症,表明免疫恢复的转变. 这种适应性免疫过渡包括扩大抗原识别和病毒清除.
科学领域:
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
- 基因组学就是基因组学.
背景情况:
- 严重的COVID-19涉及免疫失调,T细胞对疾病进展和恢复至关重要.
- 在严重的COVID-19中,T细胞受体 (TCR) 谱的纵向动态尚不清楚.
研究的目的:
- 在严重的COVID-19期间调查T细胞受体谱和适应性免疫的时间变化.
- 为了将T细胞动态与细胞因子概况相关联,以深入了解免疫恢复.
主要方法:
- 在三个时间点 (第1,4,7天) 分析了36名接受ICU治疗的严重COVID-19患者的外周血液样本.
- 批量RNA测序用于TCR谱系提取和细胞因子分析.
- 使用VDJdb和TCRex进行TCR克隆型注释,用于表位特异性推断.
主要成果:
- 在第7天观察到TCR克隆类型的2.3倍扩张和TCR-β链使用量的增加,表明多克隆T细胞反应.
- 随着时间的推移,TCR-γ链的流行率下降,并减少了促炎性细胞因子 (IL-1β,IL-6).
- 将TCR克隆类型映射到SARS-CoV-2和其他病原体表位,表明交叉反应或记忆T细胞参与.
结论:
- 严重的COVID-19恢复包括从免疫功能障碍到解决方案的协调过渡.
- 扩大TCR多样性,减少炎症和扩大抗原识别的特点是这种适应性免疫转变.
- 对TCR谱和细胞因子的综合分析为病毒清除和免疫稳定机制提供了洞察力.
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