终端分化效应记忆T细胞与基于衰老的社区队列中的认知和AD相关生物标志物相关
Edric Winford1, Jenny Lutshumba1, Barbara J Martin2
1Department of Neuroscience, University of Kentucky, 741 S. Limestone St. Rm B459, Lexington, KY, 40536, USA.
Immunity & ageing : I & A
|June 12, 2024
概括
终端分化的效应记忆T细胞 (TEMRAs) 与老年人的神经炎症和神经元损伤有关. CD8+ TEMRAs与脑损伤的生物标志物相关,这表明它在衰老和痴呆症进展中起作用.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 老年学是指老年学的学科.
背景情况:
- 免疫反应随着年龄的增长和阿尔茨海默病 (AD) 和相关痴呆症 (ADRD) 发生变化.
- 终端分化效应记忆T细胞 (TEMRAs) 在衰老和AD中至关重要,表现出细胞毒性和与认知衰退的联系.
- 对TEMRA变化与AD相关的认知衰退与一般认知衰退的特定关联仍然不清楚.
研究的目的:
- 研究TEMRAs与老年人的认知功能之间的关联.
- 为了检查TEMRAs和AD,神经退行和神经炎症的血生物标志物之间的关系.
- 在基于社区的队列中探索这些协会.
主要方法:
- 来自肯塔基大学阿尔茨海默氏病研究中心 (UK-ADRC) 队列的84名参与者的分析.
- 采集血液用于血生物标志物分析 (Aβ42/Aβ40,tau,Nf-L,GFAP) 和外周血液单核细胞 (PBMC) 隔离.
- 流细胞计量量化T细胞子集,包括CD4+和CD8+TEMRAs,TCM,天真T细胞和TEM.
主要成果:
- CD8+ TEMRAs与神经纤维光链 (Nf-L) 和状纤维酸蛋白 (GFAP),神经退行和神经炎症的标志物显示出正相关性.
- 在CD8+ TEMRAs和认知得分或AD特定生物标志物之间没有发现显著的关联.
- CD4+ TEMRAs与通过迷你精神状态检查 (MMSE) 测量的认知障碍有关.
结论:
- CD8+ TEMRAs的积累可能表明神经元损伤和神经炎症在衰老或AD/ADRD中的反应.
- 社区队列中的发现表明TEMRAs与与神经病理病发相关的系统性免疫变化有关.
- 需要进一步的研究来阐明TEMRAs在认知衰退和痴呆症中的确切作用.
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