全球缺失和针对严重COVID-19的保护性免疫状态
Alexis J Combes1,2,3, Tristan Courau4,5,6, Nicholas F Kuhn4,5
1Department of Pathology, University of California San Francisco, San Francisco, CA, USA. Alexis.Combes@ucsf.edu.
严重的COVID-19涉及过度激进的抗体反应,阻碍免疫细胞中干扰素刺激的基因表达. 在2019年冠状病毒疾病中,这种免疫自我破坏可能为新的免疫疗法提供了目标.
科学领域:
- 免疫学
- 病毒学
- 细胞生物学
背景情况:
- 严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 引起了一系列疾病,从轻度到严重.
- 了解免疫系统在2019年轻度和重度冠状病毒病 (COVID-19) 中的不同反应对于有效治疗至关重要.
研究的目的:
- 调查轻度和严重的COVID-19表型之间的免疫差异.
- 确定COVID-19患者细胞反应的背后机制.
主要方法:
- 整体血液保存单细胞分析,包括中性细胞,单细胞,血小板,淋巴细胞和血清.
- 在免疫细胞类型中分析干扰素刺激基因表达模式 (ISG).
- 在严重的COVID-19患者中检查抗SARS-CoV-2抗体功能和血清分析.
主要成果:
- 轻微的COVID-19病例在所有免疫细胞中显示协调的ISG表达.
- 严重的COVID-19患者缺乏系统性ISG表达细胞,尽管抗体度高,病毒载量低.
- 严重的COVID-19患者的抗体通过激活干扰素反应的信号回路来阻止ISG的产生.
结论:
- 严重的COVID-19的特征是过度热心的抗体反应,会损害重要的抗病毒免疫防御.
- 免疫系统攻击自身的这种免疫失调可能发生在其他病毒感染中.
- 识别这些抗体介导的阻断机制为严重的COVID-19和其他病毒性疾病提供了潜在的治疗点.
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