对细胞交叉对话的系统分析揭示了SEMA6D-TREM2在阿尔茨海默病中调节微质功能的作用
Ricardo D'Oliveira Albanus1,2,3, Gina M Finan4,5, Logan Brase1,3
1Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63130, USA.
Science translational medicine
|July 30, 2025
概括
涉及TREM2和SEMA6D的细胞通信中断会影响阿尔茨海默病 (AD) 的进展. 在AD大脑中,失去SEMA6D信号破坏了微质功能和粉样β清除.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- 细胞交叉交谈对大脑健康至关重要,并与阿尔茨海默病 (AD) 等神经退行性疾病有关.
- 了解失调的细胞通信网络对于识别AD病原和治疗点至关重要.
研究的目的:
- 重建和分析人类大脑中的细胞交叉交谈网络,以确定与阿尔茨海默病 (AD) 相关的失调.
- 在AD的背景下,研究TREM2和SEMA6D在神经元-微细胞通信中的作用.
主要方法:
- 细胞交叉通话网络的重建,使用来自人类大脑捐赠者的单核转录资料.
- 空间转录组学和组织免疫染色分析基因网络激活和蛋白质定位在人类大脑组织中.
- 使用来自TREM2淘汰赛模型的诱导多能干细胞衍生微质细胞进行验证.
主要成果:
- 确定了一个由TREM2和神经元SEMA6D介导的神经元-微细胞交叉交谈网络,在晚期AD中断.
- 在粉样β (Aβ) 斑块附近观察到SEMA6D-TREM2网络的激活,SEMA6D与斑块和微质结合在一起.
- 根据疾病阶段发现SEMA6D丰度下降,与微质激活减少和Aβ清除受损相关.
- 证明SEMA6D以TREM2依赖的方式诱导微质激活和Aβ细胞分裂.
结论:
- 描述细胞交叉交谈网络为AD生物学和遗传风险因素提供了关键的见解.
- SEMA6D-TREM2通路是神经元-微细胞通信的关键调解者,其破坏有助于AD.
- 这项研究确定了阿尔茨海默病干预的新型治疗点和途径.
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