在组织中维护和功能调节对COVID-19疫苗的免疫记忆
Julia Davis-Porada1, Alex B George2, Nora Lam3
1Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, NY 10032, USA; Medical Scientist Training Program, Columbia University Irving Medical Center, New York, NY 10032, USA.
Immunity
|November 7, 2024
概括
COVID-19 mRNA疫苗诱导组织中的持久免疫记忆. 组织中的尖端反应性T细胞随着年龄的增长而更加普遍,并提供局部调节和监控以进行保护.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 细胞生物学 细胞生物学
背景情况:
- 组织内存T细胞和B细胞对于对病原体有效免疫至关重要.
- 了解COVID-19 mRNA疫苗在各种组织中产生的长期免疫记忆对于评估疫苗有效性至关重要.
研究的目的:
- 综合分析由COVID-19 mRNA疫苗诱导的免疫记忆的分布,表型,持久性和转录特征,遍及血液,淋巴体器官和肺部.
- 研究年龄和感染史对不同组织中疫苗诱导的免疫记忆的影响.
主要方法:
- 来自63名接受了COVID-19mRNA疫苗接种疫苗的器官捐献者的免疫细胞的分析.
- 使用组织居民标记物对Spike (S) 反应性记忆T细胞和B细胞进行表征,并评估其耐用性和表型.
- 转录造型分析以了解循环中的S-反应性T细胞与组织中的功能特征.
主要成果:
- 在淋巴细胞器官和肺部发现了尖端反应性记忆T细胞,其组织居民标志物表达因感染史而变化.
- S-反应性B细胞被确定为位于淋巴体器官中的类切换记忆细胞.
- 与循环中的S反应性组织记忆T细胞相比,S反应性组织记忆T细胞表现出更长的持久性和随着年龄的增长而增加的患病率.
- 观察到功能性细分,调节性T细胞配置文件在组织中丰富,在循环中效应器/细胞分解性配置文件更丰富.
结论:
- COVID-19 mRNA疫苗在淋巴体器官和肺部建立了持久的免疫记忆.
- 疫苗诱导的T细胞记忆显示功能分离,组织寄存细胞提供局部调节,循环细胞提供监视.
- 这些发现突出了保护性免疫的机制,使组织损伤最小化.
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