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在人体效应细胞和记忆CD8T细胞分化过程中调节CD45异型:对T细胞命名的含义

Donald J McGuire^1,2, Rama S Akondy³, Shu Yang⁴

¹Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322.

Proceedings of the National Academy of Sciences of the United States of America

|August 5, 2025

概括

人类CD8T细胞在病毒接种后切换CD45RA和CD45RO表达,这一过程由抗原存在来调节. 这挑战了对记忆CD8T细胞表型的传统定义.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学

背景情况:

CD45异型 (CD45RA和CD45RO) 是T细胞分化和功能的关键标记物.
记忆CD8T细胞上CD45异型的动态表达,特别是在人类中,仍然不完全理解.

研究的目的:

为了研究疫苗接种后在病毒特异性CD8T细胞上CD45异型的纵向表达.
确定抗原在调节CD8T细胞中CD45异型切换中的作用.

主要方法:

对黄热病病毒 (YFV-17D) 疫苗特异性CD8 T细胞的CD45异型表达的纵向分析.
活体培养具有或没有相关的抗原特异性CD8T细胞,以评估CD45调节.
在细胞巨型病毒 (CMV) 和SARS-CoV-2尖端特异性CD8T细胞中分析CD45异型动态.

主要成果:

特定于YFV的CD8T细胞从CD45RO+效应细胞转变为CD45RA+记忆细胞,很少获得正规的CD45RO+中央记忆 (Tcm) 现型.
活体抗原的退出会诱导CD45RO+细胞的CD45RA再表达,而抗原的存在会维持CD45RO的表达.
特定于CMV和SARS-CoV-2的CD8 T细胞也在体内和体外表现出抗原驱动的CD45RA/RO切换.

结论:

抗原的可用性在调节人类CD8T细胞上的CD45异型表达方面发挥着关键作用.
观察到的CD45异形动力学表明,需要重新评估人类记忆CD8 T细胞的分类.
在人类病毒特异性记忆CD8 T细胞中很少检测到正规的TCM表型.

关键词:

这种CD45异构体是CD45异构体.人类CD8T细胞命名法这就是SARS-CoV-2病毒.细胞巨型病毒 (cytomegalovirus) 是一种病毒.黄热病疫苗黄热病疫苗黄热病疫苗

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