斑马鱼中长链和多醇基物质的毒性定型和发育毒性
Paul G Kraus1, Youn-Jeong Choi2,3, Linda S Lee2,3
1School of Health Sciences, Purdue University, West Lafayette, Indiana 47907, United States.
Environmental science & technology
|November 25, 2025
概括
像PFOS,PFDA和PFUnA这样的遗传per-/polyfluoroalkyl物质 (PFAS) 在斑马鱼幼虫中生物累积并破坏多巴胺水平. 对这些化学物质的发育暴露可以改变行为和神经发育.
科学领域:
- 环境毒理学环境毒理学
- 发育神经生物学 发育神经生物学
- 化学品风险评估 化学品风险评估
背景情况:
- 传统的长链每/多醇基物质 (PFAS),包括PFOS,PFDA和PFUnA,尽管生产逐步停止,但仍然存在.
- 污染的淡水鱼是这些持久化学物质的重要暴露途径.
- 关于PFDA和PFUnA的发育毒性,特别是关于神经发育的数据有限.
研究的目的:
- 在斑马鱼中描述PFOS,PFDA和PFUnA的毒动力学.
- 评估发育神经毒性的潜力,重点关注行为和多巴胺调节.
- 为了建模遗留PFAS暴露对神经健康的影响.
主要方法:
- 斑马鱼幼虫被暴露在PFOS,PFDA和PFUnA中.
- 质谱法用于量化水和斑马鱼组织中的PFAS水平.
- 视觉运动反应试验评估了幼虫的行为.
- 与酶相关的免疫吸收试验 (ELISA) 测量了多巴胺水平.
主要成果:
- PFOS,PFDA和PFUnA被快速吸收并在斑马鱼组织中显著生物缩.
- 在暴露于PFDA和PFUnA的幼虫中观察到改变的行为模式.
- 暴露于这三种PFAS导致多巴胺总水平在各种度范围内升高,降至0.004ppb.
结论:
- PFOS,PFDA和PFUnA显示出显著的生物积累潜力.
- 对这些遗留的PFAS的发育暴露可能导致神经化学和行为改变.
- 需要进一步的研究,以了解发育期PFAS暴露的长期神经后果.
相关概念视频
01:26Physical Properties of Amines
Amines with low molecular weight are usually gaseous at room temperature, while those with high molecular weight are liquid or solids in nature. Usually, low molecular weight amines have a rotten fish-like smell. Diamines typically have a pungent smell. For instance, cadaverine and putrescine, depicted in Figure 1, are two molecules responsible for decaying tissue.
01:23Toxicity Testing in Animals
Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...