败血症导致原始CD8T细胞的表型和功能的持久变化
Roger R Berton1,2, Patrick W McGonagil3, Isaac J Jensen1,2,4
1Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, Iowa, United States of America.
PLoS pathogens
|October 12, 2023
概括
败血症改变了天真的CD8T细胞池,增加了Ly6C+细胞. 这些细胞增强对新感染的反应,影响败血症幸存者的免疫功能.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 传染性疾病 传染性疾病
背景情况:
- 败血症会引发细胞因子风暴和免疫功能障碍,增加幸存者的感染易感性.
- 纯粹的CD8 T细胞池的功能和组成可能会因败血症而改变,影响后续的免疫反应.
- 了解这些变化对于管理败血症后感染至关重要.
研究的目的:
- 为了调查毒症如何诱导原始CD8T细胞池中的表型和功能变化.
- 确定I型干扰素 (IFN I) 信号在天真CD8T细胞异质性中的作用.
- 评估败血症诱导的CD8 T细胞改变对初级CD8 T细胞对感染反应的影响.
主要方法:
- 使用了多微生物血症的结和刺穿 (CLP) 鼠标模型.
- 分析了天真的CD8T细胞种群,专注于Ly6C+和Ly6C-子集.
- 对来自败血症患者的外周血液样本进行了纵向分析.
主要成果:
- I型干扰素 (IFN I) 信号驱动纯粹的CD8T细胞异质性,增加非败菌性小鼠中的Ly6C+细胞.
- 败血症幸存者表现出Ly6C+天真CD8T细胞的增加.
- 在病毒感染 (LCMV) 后,Ly6C+原始 CD8 T 细胞表现出增强的效应和记忆 CD8 T 细胞生成和细胞因子产生.
- 与健康对照人群相比,败血症患者在CD8 T细胞子集组成中表现出显著的变化.
结论:
- 败血症严重改变了天真的CD8 T细胞池组成,有利于Ly6C+细胞.
- 这些败血症引起的变化增强了CD8 T细胞对随后感染的反应.
- 败血症会影响免疫系统建立原发性CD8T细胞反应的能力,从而影响对新感染的易感性.
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