CD8+ T cell differentiation in the aging immune system: until the last clone standing

被引:36
作者
Buchholz, Veit R. [1 ]
Neuenhahn, Michael [1 ,2 ,3 ,4 ]
Busch, Dirk H. [1 ,2 ,3 ,4 ,5 ]
机构
[1] Tech Univ Munich, Inst Med Microbiol Immunol & Hyg, D-81675 Munich, Germany
[2] Helmholtz Ctr Munich Neuherberg, Clin Cooperat Grp Antigen Specif Immunotherapy, Munich, Germany
[3] Helmholtz Ctr Munich Neuherberg, Clin Cooperat Grp Immune Monitoring, Munich, Germany
[4] TUM, Munich, Germany
[5] Tech Univ Munich, Focus Grp Clin Cell Proc & Purificat, Inst Adv Study, D-81675 Munich, Germany
关键词
CYTOMEGALOVIRUS-INFECTION; RECEPTOR DIVERSITY; MEMORY INFLATION; VIRAL-INFECTION; AGED MICE; REPERTOIRE; NAIVE; EXPANSIONS; OLD; VIRUS;
D O I
10.1016/j.coi.2011.05.002
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
A substantial deterioration of the naive CD8(+) T cell pool occurs regularly in humans beyond the age of 65 years. While recall responses to pathogens encountered during youth or adulthood are largely uncompromised, the de novo generation of memory responses by aged naive CD8(+) T cells is perturbed. In recent years evidence has accumulated that the diminished responsiveness of naive CD8(+) T cells in aged humans and other mammals coincides with a progressive loss of naive T cell receptor (TCR) repertoire diversity. In this review we focus on thymic involution and chronic latent viral infections as key factors driving the reduction in naive TCR repertoire diversity. We present novel insights gained by studying the antigen-driven differentiation of single CD8(+) T cells in young hosts and discuss possible implications of these insights for therapeutic support of the thinned-out clonal T cell repertoire of the elderly by vaccination or adoptive cell therapy.
引用
收藏
页码:549 / 554
页数:6
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