纳米塑料诱导的霍尔梅西斯通过刺激谷氨合成来增强线虫中的生物积累
Caijiao He1, Shuang Zhang1, Yi Chi2
1Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou 310058, China.
The Science of the total environment
|July 1, 2025
概括
纳米塑料 (NP) 增强 (Cd) 积累在通过触发hormesis,一个应激反应,而不是直接结合. 这一过程促进了Cd结合分子的储存,增加了整体重金属风险.
科学领域:
- 环境毒理学环境毒理学
- 纳米材料科学 纳米材料科学
- 生态毒理学 生态毒理学
背景情况:
- 纳米塑料 (NP) 在环境度下表现出化,可能改变生物体对共存污染物的反应.
- 纳米塑料和重金属的综合风险,特别是重金属生物积累的风险,仍然不太清楚.
研究的目的:
- 为了研究 (Cd) 和各种聚烯纳米塑料 (PS-NP) 对Caenorhabditis elegans的联合作用.
- 阐明NP诱导生物反应影响线虫中Cd积累的机制.
主要方法:
- 使用Caenorhabditis elegans与Cd和四种类型的PS-NP (不同尺寸和表面修饰) 的同时暴露实验.
- 使用转录组学和代谢组学对Cd生物积累的量化和分子反应的分析.
- 研究谷氨 (GSH) 在Cd-NP相互作用中的参与.
主要成果:
- 通过hormesis,PS-NPs显著增加了Cd生物积累 (1.33-1.71倍),而不是直接吸附.
- 在肠道颗粒中观察到高水平的谷氨 (GSH) -Cd复合物的储存.
- 转录组和代谢组分析显示,金属反应分子的调节和含硫氨基酸代谢的激活,使GSH合成增加了一倍.
结论:
- NP诱导的化是增强重金属生物积累的关键驱动因素.
- 这种现象通过促进GSH-Cd复合物的形成和储存来放大Cd的积累.
- 调查结果强调了NP在增加重金属毒性和生态风险方面的低估作用.
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