The narrowing of the CD8 T cell repertoire in old age.

The narrowing of the CD8 T cell repertoire in old age.
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DOI:
10.1016/j.coi.2011.05.005
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发表时间:
2011-08
影响因子:
7
通讯作者:
Woodland DL
Woodland DL
中科院分区:
医学2区
文献类型:
--
作者:
Blackman MA;Woodland DL

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随着年龄的增长,免疫功能逐渐下降,导致老年人对感染的易感性增加,对疫苗的反应减弱。多样化的T细胞库对于强有力的免疫应答是必不可少的,并且免疫老化的一个重要表现是库多样性的进行性丧失,主要是在小鼠和人类中的CD8 T细胞中。重要的是,外周T细胞库中的扰动,包括CD4:CD8比率的降低和巨细胞病毒驱动的T细胞克隆扩增,对人类定义的“免疫风险表型”做出了重大贡献,该表型预测了非常年老个体的两年死亡率。
Immune function declines progressively with age, resulting in increased susceptibility of the elderly to infection and impaired responses to vaccines. A diverse repertoire of T cells is essential for a vigorous immune response, and an important manifestation of immune aging is the progressive loss of repertoire diversity, predominantly among CD8 T cells in both mice and humans. Importantly, perturbations in the peripheral T cell repertoire, including reduction of the CD4:CD8 ratio and cytomegalovirus-driven T cell clonal expansions, make a major contribution to the “immune risk phenotype” defined for humans, which predicts two-year mortality in very old individuals.
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