揭示与寡合性Aβ诱导的Src激活相关的早期事件
Sandra I Mota1,2,3, Lígia Fão1,2, Patrícia Coelho1,2
1CNC-UC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.
Antioxidants (Basel, Switzerland)
|September 28, 2023
概括
阿尔茨海默氏病 (AD) 涉及可溶性粉样β oligomers (AβO) 激活Src. kinase. 这项研究揭示了AβO触发Src激活,导致升,线粒体功能障碍和神经元中的氧化应激,这表明Src是治疗标.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 细胞生物学 细胞生物学
背景情况:
- 可溶性粉样β oligomers (AβO) 涉及到早期阿尔茨海默氏症 (AD) 病原发生.
- 已知AβO通过N-甲基-D-酸盐受体 (NMDAR) 提高细胞内和损害线粒体功能.
- Src 激酶与NMDAR相互作用,但其在早期AβO诱导的神经毒性中的作用尚不清楚.
研究的目的:
- 为了研究短暂的寡合体Aβ1-42暴露对Src酶激活的影响.
- 阐明将Src激活与线粒体功能障碍和海马神经元中氧化还原变化的机制.
主要方法:
- 主要大鼠海马神经元短时间暴露在寡合性Aβ1-42中.
- 分析了Src激活,NMDAR活性,细胞内水平和活性氧物种 (ROS) 生成 (细胞和线粒体).
- 评估了线粒体形态和Src抑制的影响.
主要成果:
- 简要 AβO 暴露诱导过氧化 (H2O2) 依存的 Src 激活.
- 观察到NMDAR激活,细胞内的增加,细胞和线粒体H2O2水平的升高.
- 观察到轻微的线粒体碎片化,由Src抑制来阻止,这表明有一个前循环.
结论:
- 激酶激活在早期AβO诱导的神经功能障碍中起着关键作用.
- AβO触发Src激活,导致通过细胞和线粒体ROS生成的突触恒常性损失.
- 调节Src活性可能为AD中线粒体和海马体的谷氨酸突触提供保护策略.
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