基础科学和病原发生学
Dallin Dressman1,2, Edric D Winford1,3, Badri N Vardarajan1,2,4
1Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
保持较高比例的天真CD8+T细胞和降低T细胞细胞毒性可能会防止阿尔茨海默病 (AD) 中的大脑缩和认知衰退. 这种免疫特征与中年成年人皮质厚度增加有关.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
背景情况:
- 老龄化和阿尔茨海默氏症 (AD) 的免疫反应各不相同,受遗传学,社会经济地位,种族和种族的影响.
- 了解与生物和认知衰老相关的免疫表型可以揭示AD风险因素和潜在的治疗点.
研究的目的:
- 调查免疫细胞表型和多民族队列中的认知/大脑衰老标志物之间的相关性.
- 识别可能影响阿尔茨海默病风险和进展的免疫过程.
主要方法:
- 从205名参与者 (年龄29-81岁) 的439,000多个免疫细胞中单细胞RNA和T/B细胞受体的测序.
- 分析了86名参与者的等离子体蛋白质组学数据.
- 评估免疫细胞比例,T细胞扩张,基因表达,认知得分和皮质厚度之间的相关性,控制人口统计.
主要成果:
- 更高的皮层厚度与增加的天真和粘膜相关的不变T (MAIT) CD8+ T细胞以及减少的效能记忆细胞有关.
- 更大的皮层厚度与降低的T细胞克隆扩张和T细胞亚型中的抗原呈现/细胞毒性基因的表达率较低有关.
- 较高的认知分数与马-三角形T细胞中细胞毒性,抗原呈现和抗菌防御基因的表达减少有关.
结论:
- 较高的天真CD8+T细胞比例和降低的T细胞细胞毒性基因表达与AD相关的大脑区域的皮质厚度较大相关,而不依赖年龄.
- 针对天真T细胞维护和T细胞细胞毒性/扩张的治疗策略可能在衰老和AD中提供神经保护和认知益处.
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