| Autor: |
Xiaoping Sun, Thomas Nguyen, Achouak Achour, Annette Ko, Jeffrey Cifello, Chen Ling, Jay Sharma, Toyoko Hiroi, Yongqing Zhang, Chee W. Chia, William Wood III, Wells W. Wu, Linda Zukley, Je-Nie Phue, Kevin G. Becker, Rong-Fong Shen, Luigi Ferrucci, Nan-ping Weng |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
The Journal of Clinical Investigation, Vol 132, Iss 17 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
1558-8238 |
| DOI: |
10.1172/JCI158122 |
| Popis: |
A diverse T cell receptor (TCR) repertoire is essential for protection against a variety of pathogens, and TCR repertoire size is believed to decline with age. However, the precise size of human TCR repertoires, in both total and subsets of T cells, as well as their changes with age, are not fully characterized. We conducted a longitudinal analysis of the human blood TCRα and TCRβ repertoire of CD4+ and CD8+ T cell subsets using a unique molecular identifier–based (UMI-based) RNA-seq method. Thorough analysis of 1.9 × 108 T cells yielded the lower estimate of TCR repertoire richness in an adult at 3.8 × 108. Alterations of the TCR repertoire with age were observed in all 4 subsets of T cells. The greatest reduction was observed in naive CD8+ T cells, while the greatest clonal expansion was in memory CD8+ T cells, and the highest increased retention of TCR sequences was in memory CD8+ T cells. Our results demonstrated that age-related TCR repertoire attrition is subset specific and more profound for CD8+ than CD4+ T cells, suggesting that aging has a more profound effect on cytotoxic as opposed to helper T cell functions. This may explain the increased susceptibility of older adults to novel infections. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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