经过衰老的多乳酸微塑料通过斑马鱼的PPARγ激活加剧脂质代谢障碍和心脏功能障碍:用聚合物和寡合物的比较研究
Hongyi Xian1, Ruobing Bai2, Yu Feng2
1National Medical Products Administration (NMPA) Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China; Department of Cardiovascular Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China.
Ecotoxicology and environmental safety
|November 4, 2025
概括
聚乳酸微塑料 (MPs) 破坏斑马鱼的脂质代谢,并通过激活PPARγ引起心脏缺陷. 不同的PLA降解阶段表现出不同的毒性,突出显示非堆肥环境中的风险.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 材料科学 材料科学 材料科学
背景情况:
- 聚乳酸 (PLA) 是一种可生物降解的塑料替代传统塑料.
- 在非堆肥条件下降解期间对PLA微塑料 (MP) 毒性的了解有限.
研究的目的:
- 为了比较斑马鱼幼虫在不同降解阶段 (聚合物,寡合物,老化聚合物) 的PLA MPs的毒性.
- 研究PLAMP诱导的毒性背后的机制,重点关注脂质代谢和心脏发育.
主要方法:
- 斑马鱼幼虫暴露于环境相关的PLA MPs度 (0.1,1,10 mg/L).
- 进行了形态,生化和转录组分析.
- 用一种特定的抗剂 (GW9662) 调查过氧酶增殖器激活受体γ (PPARγ) 的作用.
主要成果:
- 解放军的MP破坏了脂质代谢,降低了ATP水平,增加了活性氧物种,导致心脏形.
- PLA MPs激活了PPARγ,提高了参与脂质储存和心脏发育的基因.
- 聚合物聚合物表现出比聚合物寡合物和UV老化聚合物更大的心脏毒性.
结论:
- PLA MPs通过PPARγ介导的途径损害斑马鱼的能量稳态和心脏发育.
- PLA的降解阶段会影响其毒性.
- 迫切需要在现实的环境条件下对基于PLA的材料进行全面的生态风险评估.
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