化学特异化对代表性 perfluoroalkyl 酸长期甲状腺毒性的影响
Jing Li1,2, Qi Wang3, Chenyan Hu4
1Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
Environmental science & technology
|March 7, 2025
概括
与盐相比, perfluoroalkyl 酸 (PFAA) 在酸性形式时会增加慢性毒性和甲状腺干扰,影响后代的发育和基因表达.
科学领域:
- 环境毒理学环境毒理学
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
背景情况:
- 化学物种化影响了 perfluoroalkyl 酸 (PFAA) 的发育毒性.
- 与化学物种化相关的慢性PFAA毒性的机制在很大程度上是未知的.
研究的目的:
- 研究PFAA酸与盐的慢性毒性.
- 阐明斑马鱼中PFAA结构-毒性关系.
- 检查跨代效应和甲状腺功能障碍.
主要方法:
- 成年斑马鱼暴露在PFOA,PFBA和PFBS (酸和盐) 中5个月.
- 评估了F0代毒性,后代转移和胚胎生成.
- 进行了体外TRβ结合试验和CUT&Tag测序.
主要成果:
- 在F0世代中,PFAA酸在诱导甲状腺功能低下方面比盐更强大.
- 在后代中观察到更大的PFAA酸负担,与更高的跨代缺陷和甲状腺功能障碍有关.
- PFAA酸对TRβ的结合更强,抑制TR活性并改变基因组标.
结论:
- 化学物种化严重影响慢性PFAA毒性和甲状腺功能障碍.
- 这些发现强调了在PFAA风险评估和管理中考虑化学形式的重要性.
- 通过TRβ破坏,PFOA和PFBS干扰甲状腺和神经系统的过程.
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