在多巴胺能神经元中增加了帕金森症病理标志物,而在发育过程中暴露于阿特拉
Han Zhao1, Junkai Xie1, Shichen Wu1
1Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States of America.
The Science of the total environment
|November 10, 2023
概括
在发育过程中低水平的亚特拉 (ATZ) 除草剂暴露会损害大脑细胞. 这项研究表明,人类干细胞衍生神经元中的ATZ暴露增加了与帕金森病相关的神经退行性标记物.
科学领域:
- 环境毒理学环境毒理学
- 神经科学是一个神经科学.
- 发育生物学是发展生物学.
背景情况:
- 阿特拉 (ATZ) 是一种广泛使用的除草剂和内分泌干扰剂,在饮用水中发现,经常超过EPA限制.
- 流行病学研究表明,ATZ暴露与神经退行之间存在联系,但机制,特别是在发育过程中,尚不清楚.
研究的目的:
- 研究低度ATZ暴露对人类多巴胺基 (DA) 神经元发育中的神经毒性影响.
- 检查ATZ对神经元形态,活性,蛋白质聚合和基因表达的影响.
主要方法:
- 人类诱导的多能干细胞 (hiPSCs) 分化为地板原始细胞 (FPPs).
- 两天内,FPP暴露在0.3和3ppb的ATZ中,然后在没有ATZ的环境中分化为DA神经元.
- 对差异化的DA神经元进行了神经元复杂性,神经元活动,tau和α-synuclein (aSyn) 病理以及转录组变化的分析.
主要成果:
- 暴露于ATZ显著降低了神经元网络的复杂性.
- 在ATZ暴露后观察到神经元活动增加和高的tau和aSyn病理.
- 转录组分析支持观察到的神经毒性影响.
结论:
- 对低度ATZ的发育暴露会诱导神经元变化,反映帕金森病的病理学.
- 这项研究提供了证据表明,早期的ATZ暴露可能会增加神经退行症的风险.
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