六价通过触发线粒体功能障碍和ROS介导信号来诱导神经毒性
Tongtong Zhang1, Lina Feng2, Jie Cui2
1Department of Neurology, People's Hospital of Linyi, Linyi, 276000, Shandong, China.
Neurochemical research
|November 27, 2023
概括
六价 (Cr (VI)) 暴露会通过引起线粒体功能障碍和氧化应激而损害主要神经元. 谷氨酸 (GSH) 减轻了这些影响,改善了神经活力,并表明了Cr (VI) 神经毒性机制.
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.
- 细胞毒理学 细胞毒理学
背景情况:
- 六价 (Cr (VI)) 是一种广泛存在的环境污染物,已知具有系统性毒性.
- (VI) 诱导的神经毒性,特别是在初级神经元水平上,仍未得到充分研究.
- 了解Cr (VI) 对神经元的影响对于公共卫生和环境安全至关重要.
研究的目的:
- 为了研究Cr (VI) 对大鼠海马中主要神经元的神经毒性作用.
- 阐明Cr (VI) 诱导的神经毒性的潜在机制,重点关注线粒体功能和氧化应激.
- 评估谷氨 (GSH) 对Cr (VI) 神经毒性的潜在保护作用.
主要方法:
- 主要大鼠海马神经元被暴露在二氧化 (K2Cr2O7) 中,以模拟Cr (VI) 暴露.
- 通过MTT测定来评估神经活力.
- 使用JC-1和Mito-Tracker探针评估了线粒体功能障碍.
- 使用DCFH-DA和Mito-SOX Red测量了氧化应激标志物,包括活性氧物种 (ROS) 和DNA损伤.
- 分析了Bcl-2家族蛋白质和MAPKs的表达水平,并通过西式涂抹进行了分析.
主要成果:
- 暴露于Cr (VI) 显著抑制了神经活力,这种活力取决于剂量和时间.
- 通过改变BCL-2家族蛋白质表达,Cr (VI) 诱导了线粒体功能障碍.
- 在Cr (VI) 治疗后观察到细胞内ROS生成增加,DNA损伤和MAPKs激活.
- 谷氨 (GSH) 的使用有效抵消了Cr (VI) 诱导的ROS产生,恢复了Bcl-2家族表达,减弱了DNA损伤,并减少了MAPKs的激活,最终改善了神经活力.
结论:
- 在初级海马神经元中,Cr (VI) 具有显著的神经毒性.
- 神经毒性机制包括Cr (VI) 诱导的线粒体功能障碍,ROS介导的氧化损伤和MAPKs路径激活.
- 谷氨 (GSH) 通过减轻氧化应激和相关的细胞损伤,显示出对Cr (VI) 神经毒性的保护作用.
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