慢性化物通过肠-大脑轴诱导斑马鱼的神经毒性
Jianjie Chen1, Mengyan Xu2, Lijuan Li1
1College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China.
Comparative biochemistry and physiology. Toxicology & pharmacology : CBP
|February 26, 2025
概括
斑马鱼的慢性化物暴露会损害大脑组织,改变行为,并破坏肠道健康. 这种神经毒性与肠道微生物群失衡和降低多巴胺水平有关,男性更容易受到影响.
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.
- 鱼类生物学 鱼类生物学
背景情况:
- 化物是水中普遍存在的污染物.
- 长期暴露于化物对鱼类的神经系统和行为构成风险.
- 鱼类中化物毒性的确切机制在很大程度上仍然是未知的.
研究的目的:
- 为了研究慢性化物暴露对斑马鱼行为的影响.
- 阐明化物诱导的神经毒性和行为变化的潜在机制.
主要方法:
- 斑马鱼被暴露在不同化物度 (CK,LF,MF,HF) 中90天.
- 进行了行为分析,大脑和肠道组织检查,多巴胺水平测量,基因表达分析和肠道微生物群分析.
主要成果:
- 化物暴露导致了脑组织损伤,并减少了斑马鱼的游泳活动.
- 大脑和肠道中的多巴胺水平和相关基因表达显著下降.
- 肠道屏障功能被破坏,增加了透性并改变了肠道微生物群的组成.
- 雄性斑马鱼对高化物度表现出更大的敏感性.
结论:
- 化物通过破坏肠道透性和肠道微生物群失衡,诱导斑马鱼的神经毒性和行为变化.
- 大脑和肠道中多巴胺通路的失调有助于观察到的毒性影响.
- 肠道微生物群失调和相关的代谢途径改变是化物毒性的关键机制.
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