对人体胸腺和外围血液的单细胞分析揭示了T细胞发育和衰老的动态
Yujun Deng1, Zhengcan Peng1, Kang Ming1
1Center for Immunology and Hematology, Department of Biotherapy and Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.
Nature aging
|October 24, 2025
概括
衰老会损害甲状腺,降低T细胞潜力,改变外围T细胞. 研究人员确定了免疫衰老和最近的胸膜移民的标记物,为T细胞免疫力下降提供了洞察力.
科学领域:
- 免疫学 免疫学 免疫学
- 老年学是一门学科.
- 细胞生物学 细胞生物学
背景情况:
- 与年龄相关的胸膜内置增加了老年人感染和癌症的易感性.
- 驱动胸膜衰老的精确机制及其对外围T细胞的影响尚未完全理解.
研究的目的:
- 通过单细胞分析,研究衰老对人类胸腺和外围T细胞的影响.
- 确定T细胞衰老的分子特征,并开发免疫衰老的预测模型.
- 在衰老过程中特征T细胞受体谱的变化.
主要方法:
- 单细胞RNA测序387,762个细胞从人类胆小板和年轻人和老年人的外周血液.
- 分析T细胞谱系潜力,基因表达特征和T细胞受体谱.
- 识别与胸膜衰老和T细胞群相关的细胞表面标记物.
主要成果:
- 衰老降低了早期胸腺原始体的T系潜力,但增加了胸腺内先天性淋巴细胞潜力.
- 衰老的胸腺体显示成熟的T细胞具有炎症特征的丰富和胸腺上皮细胞的枯竭.
- 在周围血液中发现了T细胞衰老的转录特征,从而产生了基于T细胞的免疫年龄预测模型.
- CD38被确定为最近的胸膜迁移的标记物.
- 在T细胞受体谱的多样性转移到记忆/效应T细胞,老年人病毒特异性T细胞的扩张.
结论:
- 这项研究提供了对人类胸膜内置和外围T细胞衰老的全面见解.
- 研究结果揭示了关键的分子和细胞变化,有助于与年龄相关的T细胞免疫力下降.
- 鉴定的标记物和模型可以指导恢复老年人免疫功能的策略.
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