在阿尔茨海默病小鼠模型中,AIBP控制TLR4炎症和线粒体功能障碍
Yi Sak Kim1, Soo-Ho Choi1, Keun-Young Kim2
1Department of Medicine, University of California, San Diego, La Jolla, CA, 92093, USA.
bioRxiv : the preprint server for biology
|April 8, 2024
概括
ApoA-I结合蛋白 (AIBP) 通过调节微质炎症反应和线粒体功能来保护阿尔茨海默病. 删除AIBP会在小鼠模型中恶化神经炎症,氧化应激和神经退行.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 微质驱动的神经炎症是阿尔茨海默病 (AD) 发病的核心原因.
- 激活的微质细胞形成TLR4炎症,富含胆固醇的脂质,促进炎症.
研究的目的:
- 研究ApoA-I结合蛋白 (AIBP) 在调节TLR4炎症和AD中的微质功能中的作用.
- 确定AIBP缺乏对AD进展和神经退行症的影响.
主要方法:
- 使用微质细胞的体外研究和使用缺乏AIBP (Apoa1bp-/- APP/PS1) 的APP/PS1转基因小鼠的体内研究.
- 分析TLR4炎症支架形成,微质激活,线粒体形态,氧化应激 (ROS),内分泌网膜扩张,粉样β (Aβ) 斑块负荷,神经元细胞死亡和动物生存.
主要成果:
- 粉样β诱导的TLR4炎症发生在微质细胞中.
- Apoa1bp-/- APP/PS1微质表现出高分支线粒体,ROS增加和扩张的ER.
- 与对照组相比,Aβ斑块负担,神经元细胞死亡和死亡率在Apoa1bp-/- APP/PS1小鼠中显著增加.
结论:
- AIBP控制了TLR4炎症机和微质中的线粒体动态.
- 在减轻与AD相关的氧化应激和神经退行方面,AIBP起着保护作用.
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