环境毒素带来的神经系统风险的病理生理学:Microcystin-LR通过使用大脑器官模型和小鼠模型的热致死途径导致神经元数量的减少
Ying Liu1, Qinmei Tan1, Mei Yuan1
1The Affliated Nanhua Hospital, Key Laboratory of Environmental Health and Risk Control of Hunan Province, School of Public Health, Hengyang Medical School, University of South China, Hengyang 421001, China.
Ecotoxicology and environmental safety
|March 7, 2026
概括
微囊素-LR (MC-LR) 引起神经毒性,减少神经元数量并激活大脑器官和小鼠的炎症途径. 这项研究揭示了MC-LR触发JNK/NF-κB信号,导致神经炎症和热.
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.
- 细胞生物学 细胞生物学
背景情况:
- 微素-LR (MC-LR) 是一种强烈的毒素,可疑具有神经毒性作用.
- 对于MC-LR神经毒性的精确机制及其对大脑健康的影响仍然不完全理解.
- 了解MC-LR的影响对于公共卫生和生态系统保护至关重要.
研究的目的:
- 通过使用大脑器官和小鼠模型来研究MC-LR暴露的神经毒性作用.
- 阐明MC-LR诱导的神经毒性的潜在分子机制.
- 评估MC-LR对神经元活力,炎症和细胞死亡途径的影响.
主要方法:
- 利用微电极阵列 (MEA) 和TUNEL在人类大脑器官中进行染色,以评估神经元活动和死亡.
- 给12个月大小的小鼠服用不同度的MC-LR,随后进行了基因病理学和生物化学分析.
- 在小鼠海马组织中使用qPCR和Western blot来分析JNK/NF-κB信号和炎症标记物 (nlrp3,caspase-1,il-18,il-6,gsdmd) 的激活.
主要成果:
- 急性MC-LR暴露显著降低了大脑器官中的神经元放电活动和神经元数量.
- 在有机体和小鼠模型中,MC-LR暴露导致了神经元死亡的增加和神经元数量的减少.
- 长期的MC-LR暴露激活了JNK/NF-κB通路,在小鼠海马中诱导神经炎症和热.
结论:
- MC-LR 具有显著的神经毒性潜力,导致神经元损失和功能障碍.
- 长时间的MC-LR暴露会触发JNK/NF-κB信号,导致神经炎症和神经元灭.
- 这些发现凸显了MC-LR对大脑健康的重大风险,并需要进一步研究缓解策略.
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