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CMV-independent increase in CD27-CD28+ CD8+ EMRA T cells is inversely related to mortality in octogenarians.
npj Aging ( IF 4.1 ) Pub Date : 2020-01-21 , DOI: 10.1038/s41514-019-0041-y
Carmen Martin-Ruiz 1, 2 , Jedrzej Hoffmann 3 , Evgeniya Shmeleva 4 , Thomas von Zglinicki 1, 5 , Gavin Richardson 1 , Lilia Draganova 6 , Rachael Redgrave 1 , Joanna Collerton 1 , Helen Arthur 1 , Bernard Keavney 7, 8 , Ioakim Spyridopoulos 1, 6
Affiliation  

Cytomegalovirus (CMV) seropositivity in adults has been linked to increased cardiovascular disease burden. Phenotypically, CMV infection leads to an inflated CD8 T-lymphocyte compartment. We employed a 8-colour flow cytometric protocol to analyse circulating T cells in 597 octogenarians from the same birth cohort together with NT-proBNP measurements and followed all participants over 7 years. We found that, independent of CMV serostatus, a high number of CD27-CD28+ CD8 EMRA T-lymphocytes (TEMRA) protected from all-cause death after adjusting for known risk factors, such as heart failure, frailty or cancer (Hazard ratio 0.66 for highest vs lowest tertile; confidence interval 0.51-0.86). In addition, CD27-CD28+ CD8 EMRA T-lymphocytes protected from both, non-cardiovascular (hazard ratio 0.59) and cardiovascular death (hazard ratio 0.65). In aged mice treated with the senolytic navitoclax, in which we have previously shown a rejuvenated cardiac phenotype, CD8 effector memory cells are decreased, further indicating that alterations in T cell subpopulations are associated with cardiovascular ageing. Future studies are required to show whether targeting immunosenescence will lead to enhanced life- or healthspan.

中文翻译:

CD27-CD28+ CD8+ EMRA T 细胞的 CMV 独立增加与八旬老人的死亡率呈负相关。

成人巨细胞病毒(CMV)血清阳性与心血管疾病负担增加有关。从表型上看,CMV 感染会导致 CD8 T 淋巴细胞区室膨胀。我们采用 8 色流式细胞术方案分析来自同一出生队列的 597 名八旬老人的循环 T 细胞以及 NT-proBNP 测量结果,并对所有参与者进行了 7 年多的跟踪。我们发现,独立于 CMV 血清状态,在调整已知的危险因素(例如心力衰竭、虚弱或癌症)后,大量 CD27-CD28+ CD8 EMRA T 淋巴细胞 (TEMRA) 可以避免全因死亡(对于心力衰竭、虚弱或癌症的风险比为 0.66)最高与最低三分位数;置信区间 0.51-0.86)。此外,CD27-CD28+ CD8 EMRA T 淋巴细胞可预防非心血管死亡(风险比 0.59)和心血管死亡(风险比 0.65)。在接受 senolytic navitoclax 治疗的老年小鼠中,CD8 效应记忆细胞减少,进一步表明 T 细胞亚群的变化与心血管衰老相关,我们之前已经在其中显示了心脏表型的恢复。未来的研究需要证明靶向免疫衰老是否会延长寿命或健康寿命。
更新日期:2020-01-21
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