在细胞因子风暴期间可以保持平静吗? 免疫检查点路径影响COVID-19疾病的严重程度
Matyas Meggyes1,2, David U Nagy3, Ildiko Toth4
1Department of Medical Microbiology and Immunology, Medical School, University of Pecs, Pecs, Hungary.
Frontiers in microbiology
|January 7, 2025
概括
严重的COVID-19患者表现出免疫功能障碍,TIGIT和PD-1途径与细胞因子风暴期间的疾病严重程度和死亡率有关. 了解这些免疫检查点对于管理严重感染至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 病理生理学 病理生理学
背景情况:
- 随着疾病严重程度的变化,COVID-19流行病对全球健康构成了重大挑战.
- 细胞因子风暴是严重COVID-19的标志,导致显著的发病率和死亡率.
- 免疫失调,特别是涉及免疫检查点,被怀疑是严重的COVID-19病原体.
研究的目的:
- 为了研究中度和重度COVID-19患者的免疫特征,这些患者经历了细胞因子风暴.
- 探索免疫细胞特征与严重COVID-19中的死亡率之间的关联.
- 阐明编程死亡-1 (PD-1) /编程死亡连接体1 (PD-L1) 和具有Ig和ITIM域 (TIGIT) 途径的T细胞免疫受体在COVID-19严重性中的作用.
主要方法:
- 流细胞测量用于分析中度,重度COVID-19患者和健康对照的外周血液单核细胞.
- 免疫细胞的表型和功能特征在各组之间进行了比较.
- 使用Luminex试验量化了可溶性免疫检查点分子和配体.
主要成果:
- 严重的COVID-19患者显示CD8+ T细胞频率降低,但CD8+ T,NK和NKT细胞过度活化.
- 在重症患者的单细胞中观察到免疫检查点配体的升级.
- CD8+ T和NK细胞上的TIGIT表达,NKT细胞上的PD-1,表明了一系列免疫功能障碍,包括过度活化和疲劳,与病毒清除受损和致命结果有关.
结论:
- 免疫检查点路径和激活签名是COVID-19疾病严重程度的关键决定因素.
- 这项研究强调了严重的COVID-19的双重免疫反应:高活性与疲劳的特征一起.
- 增加NK细胞激活和细胞毒性与严重的COVID-19患者的致命结果相关,这些患者有细胞因子风暴.
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