微型纳米塑料引发了依赖大小和负担的肠道异质酸化和海洋足动物的氧化应激
1School of Energy and Environment and State Key Laboratory of Marine Environmental Health, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China.
Environmental pollution (Barking, Essex : 1987)
|December 26, 2025
概括
微纳米塑料 (MNP) 导致海洋足动物的肠道酸化和氧化应激. 藻会加剧酸化,但减少压力,揭示了MNP对动物浮游生物的复杂影响.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 毒理学 毒理学 毒理学
背景情况:
- 微纳米塑料 (MNP) 污染了全球的海洋生态系统,原因是废物管理不足.
- 海洋动物浮游生物,像copepods一样,容易受到MNP摄入和相关的毒理效应.
研究的目的:
- 为了研究MNP对肠道pH值和海洋脚 (Parvocalanus crassirostris) 的氧化应激的影响.
- 评估MNP大小,度和食物可用性如何影响这些生理反应.
主要方法:
- 使用聚合诱导排放光原体 (AIEgens) 标记的MNP和光探头用于体内视觉化和肠道pH和活性氧物种 (ROS) 的量化.
- 采用毒理学建模,特别是逻辑物流模型,以将MNP负担与ROS水平相关联.
- 评估了MNP度的变化和藻的存在对Copepod生理学的影响.
主要成果:
- MNPs诱导前肠中肠酸化和减少后肠酸性,观察到与大小相关的效应.
- 藻加剧了MNP诱导的酸化,但减轻了ROS过度生产.
- 尽管内部化有限,但NP产生的ROS水平明显高于MP. 较高的MNP负担与ROS增加相关,MP显示较低的值,但最大ROS产量低于NP.
结论:
- 许多MNP对海洋足动物产生异质影响,影响肠道pH值,并诱导全身氧化应激.
- 食物的可用性 (藻) 调节了MNP的毒性,突出了复杂的生态相互作用.
- 这些发现为MNP对海洋浮游生物健康和生态系统功能的次致命影响提供了关键的见解.
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