甲基胺在斑马鱼幼虫上对不同类型的微塑料具有不同的关节毒性,通过调解氧化应激来调解氧化应激
Jindong Xu1, Wenqi Yang1, Dongyi Wang1
1College of Oceanography, Hohai University, Nanjing 210098, China.
Toxics
|January 22, 2024
概括
聚钢 (PS) 和PVC微塑料 (MPs) 伤害斑马鱼幼虫,而PS更有毒. 甲基胺 (METH) 恶化了PS的影响,但减少了PVC的毒性,影响了水生生态系统.
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
- 聚合物科学 聚合物科学
背景情况:
- 水生生态系统面临着聚钢 (PS) 和PVC微塑料 (MPs) 以及甲基胺 (METH) 的共同污染.
- 这些污染物对水生生物的联合毒性在很大程度上仍未知.
研究的目的:
- 为了研究PS和PVCMPs对斑马鱼幼虫的差异性毒性.
- 评估MPs和METH在水生环境中的联合毒性影响.
- 阐明MP诱导的毒性和METH相互作用的潜在机制.
主要方法:
- 斑马鱼幼虫暴露于单个PS和PVCMPs (20毫克L-1) 和与METH (250和500微克L-1) 结合使用10天.
- 分析了与氧化应激和炎症相关的致命效应,运动,组织病理和基因表达.
- 检查了肠道中的颗粒沉积.
主要成果:
- 无论是PS还是PVC的MP都造成了致命的影响 (10-20%) 并显著抑制了斑马鱼的运动.
- 组织病理学分析显示了MP粒子沉积和肠道中的炎症反应.
- PS MPs的毒性比PVC MPs更高;METH加剧了PS的毒性,但对抗了PVC的毒性.
结论:
- 与PVC微塑料相比,聚乙烯微塑料对鱼幼虫的毒性更大.
- 甲基胺与PS和PVCMP有不同的相互作用,刺激PS的毒性,同时对抗PVC的毒性.
- 这些发现为管理水生环境中微塑料和甲基胺污染的策略提供了信息.
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