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在斑马鱼 (Danio rerio) 胚胎中由有机金属和离子锡化合物诱导的生物积累和氧化应激
Jalal Hassan1, Aref Barkhordari2, Mohammad Kazem Koohi2
1Division of Toxicology, Department of Comparative Bioscience, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran. jalalhassan@ut.ac.ir.
Bulletin of environmental contamination and toxicology
|April 1, 2025
概括
在斑马鱼胚胎中,三乙 (TBT) 和三乙 (TPT) 暴露增加了氧化应激标志物和死亡率. 更多的TBT生物累积,表明在成长中的鱼类中毒性和易感性更高.
科学领域:
- 环境毒理学环境毒理学
- 水生生态毒理学 水生生态毒理学
- 鱼类胚胎学 鱼类胚胎学
背景情况:
- 包括Tributyltin (TBT) 和Triphenyltin (TPT) 在内的锡化合物是水生生态系统中持续存在的内分泌干扰化学物质.
- 这些有机蛋白可以干扰水生生物的生物过程,需要研究它们的特定影响.
- 微量锡对于鱼类的发育至关重要,但人类产生的有机素会带来重大环境风险.
研究的目的:
- 为了研究TBT,TPT和SnCl在斑马鱼胚胎中的生物积累和氧化应激效应.
- 为了确定这些锡化合物在斑马鱼中的急性毒性和LC50,96h值.
- 评估斑马鱼胚胎对TBT,TPT和SnCl2的不同敏感性.
主要方法:
- 斑马鱼胚胎暴露于不同度 (0-20 ng/L) 的TBT,TPT和SnCl.
- 评估了急性毒性,并计算了LC50,96h值.
- 测量了氧化应激生物标志物的水平,包括甲基酶 (CAT),超氧化脱酶 (SOD) 和甲 (MDA).
主要成果:
- 确定的LC50,96h值为TBT的4.2 ng/L,TPT的8.7 ng/L,SnCl2的12.56 ng/L. 这些值为TBT的4.2 ng/L,TPT的8.7 ng/L,SnCl2的12.56 ng/L.
- 暴露于TBT,TPT和SnCl导致CAT,SOD和MDA水平增加,这表明氧化应激.
- 与TPT和SnCl2相比,TBT表现出更高的生物积累,并在斑马鱼胚胎中引起更高的死亡率.
结论:
- 斑马鱼胚胎对TBT非常敏感,导致显著的氧化应激并破坏抗氧化剂平衡.
- 在这个模型中,TBT表现出比TPT和SnCl2更大的生物积累潜力和急性毒性.
- 这些发现凸显了水生环境中有机化合物的生态毒理风险,特别是对成长中的鱼类.
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