化基因受体CXCR3在流感发病过程中促进CD8+ T细胞依赖的肺病理
Kai Guo1, Dan J K Yombo2, Zhihan Wang2,3
1Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA.
Science advances
|January 3, 2024
概括
准CXCR3+ CD8+ T细胞可以预防流感感染期间的肺损伤. 阻断CXCR3可以减轻肺损伤而不影响病毒清除,这表明治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 呼吸系统医学 呼吸系统医学
背景情况:
- CD8+ T 细胞在流感中起着双重作用,有助于病毒控制和肺病理.
- 特定的CD8+T细胞子集可能会调解这些不同的功能,但它们的确切作用需要进一步阐明.
研究的目的:
- 在流感感染期间剖析CD8+ T细胞反应的异质性.
- 确定特定的CD8+T细胞子集及其相关的分子机制,驱动保护性免疫与肺病理.
- 探索针对特定的CD8+T细胞通路 (如CXCR3) 的治疗潜力,以减轻流感引起的肺损伤.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 分析流感感染小鼠肺中的CD8+T细胞.
- 识别不同的CD8+T细胞亚群及其调节网络 (regulons).
- 药理上阻断CD8+T细胞活动和CXCR3信号传递.
- 使用野生类型和Cxcr3缺乏的小鼠进行采养转移实验.
主要成果:
- 在流感感染期间,scRNA-seq在CD8+T细胞群中显示出显著的多样性.
- 一个Cxcr3高的CD8+T效应子集与增强的细胞毒性反应有关.
- CD8+ T 效应体和中央记忆细胞都表现出强大的效应体功能.
- 在感染晚期或持续减少的肺损伤时阻止CD8+ T细胞或CXCR3,而不会影响病毒清除.
- 在Cxcr3缺乏的小鼠中,野生型CD8+T细胞的收养转移使肺病理恶化.
结论:
- CXCR3+ CD8+ T细胞参与调解流感诱导的肺病理.
- 向CXCR3是一个潜在的治疗策略,可以减轻与流感感染相关的肺损伤,同时保持病毒控制.
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