与阿尔茨海默病相关的Aβ寡合体和氧化应激对血脑屏障功能障碍的影响
Brittany E Watson1, Mihyun L Waugh1, Nolan J Foreman1
1Department of Biomedical Engineering, Univ of South Carolina, Columbia, SC, USA.
Tissue barriers
|September 3, 2025
概括
阿尔茨海默病 (AD) 涉及到血脑屏障 (BBB) 的功能障碍. 致病性粉样β寡合体和氧化应激会恶化BBB完整性,这表明AD的早期治疗点.
科学领域:
- 神经科学
- 细胞生物学
- 病理学
背景情况:
- 血脑屏障 (BBB) 功能障碍是阿尔茨海默病 (AD) 的早期标志.
- 导致AD的BBB功能障碍的主要因素包括粉样β (Aβ) 蛋白聚合和氧化应激增加.
- 了解Aβ与氧化应激之间的相互作用对于AD的发病至关重要.
研究的目的:
- 研究病原性Aβ寡聚体和氧化应激对BBB完整性的单独和联合影响.
- 使用人类大脑的微血管内皮细胞模型来评估BBB跨内皮电阻 (TEER).
主要方法:
- 培养初级人类大脑微血管内皮细胞以形成BBB模型.
- 细胞暴露于不同度的Aβ寡合体和/或氧化应激.
- 使用TEER测量来量化屏障完整性的变化.
主要成果:
- 不有毒的Aβ寡合体显著降低了TEER,表明BBB减弱.
- Aβ单体没有影响TEER.
- 轻微的氧化应激虽然不影响屏障完整性,但加剧了Aβ寡合体对TEER的有害影响.
结论:
- 致病性Aβ寡合体,特别是在氧化应激的存在下,有助于阿尔茨海默病早期的BBB功能障碍.
- 这些发现凸显了BBB作为阿尔茨海默病早期干预的潜在治疗点.
- Aβ和氧化应激对BBB完整性的协同作用需要进一步研究AD治疗策略.
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