单细胞转录组学揭示了COVID-19和HIV中T细胞的内在和系统衰老
Alan Tomusiak1,2, Sierra Lore1,3, Morten Scheibye-Knudsen3
1Buck Institute for Research on Aging, Novato, CA 94945, USA.
Aging
|February 26, 2026
概括
新的单细胞生物标志物可以区分免疫细胞内的衰老与细胞群的变化. 这有助于了解COVID-19和HIV等疾病如何影响免疫衰老.
科学领域:
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
- 衰老研究研究 衰老研究
背景情况:
- 目前的衰老生物标志物通常依赖于大量细胞测量,掩盖细胞内在衰老的系统性影响.
- 区分细胞组成的变化和内在细胞衰老对于理解疾病影响至关重要.
研究的目的:
- 开发和应用单细胞转录基因时钟,以区分系统和细胞内在衰老.
- 为了调查免疫衰老的签名,以应对COVID-19和HIV+ART.
主要方法:
- 利用单细胞RNA测序来分析细胞和散装水平的衰老.
- 开发了"Tictock" (T免疫细胞转录的时钟) 用于T细胞的年龄和细胞类型预测.
- 在共享的时钟基因上进行基因本体学丰富分析.
主要成果:
- 在6个人类T细胞子集中,Ticktock准确地预测了年龄和细胞类型.
- COVID-19与CD8+细胞毒性T细胞增加有关;HIV+ART显示T细胞组成稳定.
- 无论是COVID-19还是HIV+ART都增加了原始CD8+T细胞的转录组年龄.
- 确定了常见的衰老途径,包括核糖体成分和TNF受体结合.
结论:
- 单细胞转录生物标志物可以解开系统性和细胞内在的免疫衰老.
- 这种方法为测量健康和疾病中的免疫衰老提供了一个强大的工具.
- 这些发现突出显示了COVID-19和HIV+ART的独特免疫衰老特征.
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