天体细胞启动自流,并在内化非活性本源细胞外α-synuclein后维持细胞活力
Fotis Andromidas1, Brooke E Mackinnon1, Abigail J Myers1
1Biology Department, University of Hartford, 200 Bloomfield Avenue, West Hartford, CT 06117, United States of America.
Molecular and cellular neurosciences
|October 5, 2024
概括
星球细胞可以在健康条件下处理和降解α-synuclein (αS),这表明星球细胞功能障碍可能会在神经退行过程中毒性αS积累之前.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 天体细胞调节突触健康,并与神经退行性疾病有关.
- 早期疾病阶段的突触损失可能源于天体细胞功能障碍.
- 细胞外α-synuclein (αS) 吸收和降解由天体细胞是关键的,但它们对单体αS在健康状态的反应是未知的.
研究的目的:
- 为了研究对单体αS的反应中天体细胞自功能.
- 为了建模健康的生理条件,用于天体细胞αS管理.
- 评估天体细胞反应,包括蛋白质降解,亡和炎症标志物.
主要方法:
- 人类原发性皮质星体细胞用单体αS和γ-synuclein (γS) 进行治疗.
- 西部斑点和超分辨率成像以确认αS内部化和聚合.
- 流细胞计 (附件V/PI) 用于对细胞亡的评估.
- 对阿波利波蛋白E (ApoE) 和c-JUN蛋白水平的分析.
主要成果:
- 天体细胞在12-48小时内成功地内化了单体αS,而二元体在48小时后出现.
- 自流是由αS在48小时后诱导的.
- 24小时过渡的早期亡在48小时内消失,表明没有细胞死亡.
- 天体细胞分泌的ApoE减少,而核c-JUN水平增加.
- 天体细胞有效地管理了单体αS降解需求.
结论:
- 在健康的生理条件下,星体细胞具有降解单体αS的能力.
- 星细胞功能障碍可能是神经退行性疾病中有害αS积累的早期事件.
- 这项研究提供了关于非病理状态中的星细胞-αS相互作用的见解.
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