暴露于PM2.5会通过破坏铁代谢和Nrf2介导的铁亡路来加剧症状和认知功能障碍
Huiya Mei1, Dongqin Wu1, Zenghua Yong2
1Department of Pediatrics, Affiliated Hospital of Jiangnan University, Wuxi, China; Lab of Modern Environmental Toxicology, Public Health and Preventive Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, China.
The Science of the total environment
|November 19, 2023
概括
空气污染,特别是细颗粒物 (PM2.5),可以通过破坏铁平衡并导致大脑中神经元铁亡,从而加剧和认知问题. 控制PM2.5暴露对于发作患者至关重要.
科学领域:
- 神经科学是一个神经科学.
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
背景情况:
- 空气污染,特别是细颗粒物 (PM2.5) 是一个全球性问题,具有跨境影响.
- 虽然PM2.5对呼吸系统和心血管系统的影响已知,但新兴的研究将其与中枢神经系统风险联系起来.
- 有限的研究探索PM2.5对发作和神经元铁亡的影响.
研究的目的:
- 调查PM2.5暴露对症状的影响.
- 在发作的背景下检查PM2.5诱导的海马神经神经灭.
- 了解患者中PM2.5水平,铁稳态和Nrf2铁性通路之间的关系.
主要方法:
- 在性小鼠中利用莫里斯水迷宫,拉辛分数和EEG记录来评估发作恶化和认知功能障碍.
- 采用Nissl染色和CCK-8测试来评估PM2.5.5的神经毒性影响.
- 分析了传输电子显微镜 (TEM) 图像,以直接证实铁亡.
- 测量了Fe2+和脂质活性氧物种 (ROS) 水平,以支持ferroptosis的发现.
主要成果:
- 在性小鼠中,PM2.5暴露加剧了发作症状和认知功能障碍.
- 暴露于PM2.5引发了神经毒性作用和海马神经元灭.
- 升高的Fe2+和脂质ROS水平表明PM2.5诱导的铁亡.
- 在高PM2.5区域的发作患者表现出铁稳定性和Nrf2-依赖性铁亡路的破坏.
结论:
- 暴露于PM2.5会对中枢神经系统产生负面影响,特别是在患者中.
- PM2.5有助于海马神经元铁亡,并加剧与有关的神经系统缺陷.
- 控制PM2.5空气污染对于控制发作情况和预防神经损伤至关重要.
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