PM2.5诱导皮质器官中的发育神经毒性
Yuqing Han1, Zhenjie Yu1, Yue Chen2
1Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, 300384, China.
Environmental pollution (Barking, Essex : 1987)
|September 8, 2024
概括
细颗粒物 (PM2.5) 暴露会损害人类发育中的大脑,导致神经元死亡并扰乱发育. 这项研究使用3D大脑器官来揭示PM2.5的神经毒性机制.
科学领域:
- 神经科学是一个神经科学.
- 发展性毒理学 发展性毒理学
- 环境健康 环境健康
背景情况:
- 颗粒物 (PM2.5) 暴露与神经发育毒性有关,穿越胎盘和血脑屏障.
- 现有的二维细胞和动物模型不能准确地反映人类大脑的发育,掩盖了PM2.5精确的神经毒性机制.
- 需要先进的模型来研究PM2.5对人类大脑发育的影响.
研究的目的:
- 研究PM2.5诱导的神经毒性在人类大脑发育中的机制.
- 利用模仿早期人类大脑皮层发育的三维 (3D) 皮质器官.
- 评估PM2.5对神经元亡,分化和分子通路的影响.
主要方法:
- 开发3D人类皮质器官,表达皮质层蛋白质.
- 在5微克/毫升和50微克/毫升的度下,有机体暴露于PM2.5.
- 神经元亡,神经区分和基因表达 (转录学) 的分析.
主要成果:
- 暴露于PM2.5引发了显著的神经细胞亡,并破坏了正常的神经分化.
- 转录基因分析显示了线粒体复合体I功能中的PM2.5诱导的异常.
- 观察到的效应表明与帕金森综合征,错误的轴突引导和突触维护受损的潜在联系.
结论:
- 3D皮质有机体为评估PM2.5神经毒性在人类大脑发育过程中提供了强大的模型.
- 暴露于PM2.5通过亡和分化干扰对神经发育产生不利影响.
- 调查结果强调需要严格的空气污染控制政策来保护公共健康,特别是在中国.
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