污染物 perfluorohexane sulfonate (PFHxS) 降低了血清甲状腺素,但没有改变出生后大鼠大脑中的甲状腺作用
Katherine L O'Shaughnessy1, Kiersten S Bell2, Aubrey L Sasser2
1Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, United States Environmental Protection Agency, Research Triangle Park, NC 27709, USA.
Environment international
|July 4, 2024
概括
像PFHxS这样的Per-和多醇基物质 (PFAS) 改变甲状腺激素水平,但似乎不会在老鼠中引起发育神经毒性. 与抗甲状腺药物不同,PFHxS对大脑甲状腺激素的作用产生了有限的影响.
科学领域:
- 环境毒理学环境毒理学
- 神经内分泌学神经内分泌学
- 发展性毒理学 发展性毒理学
背景情况:
- 和多醇基物质 (PFAS) 是广泛存在的环境污染物,与公共卫生问题有关,包括甲状腺功能障碍.
- 甲状腺激素 (THs) 对正常的大脑发育至关重要,引发了人们对PFAS可能作为发育神经毒剂的担忧.
- 暴露于PFAS的特定神经发育影响,特别是PFHxS,仍然不太清楚.
研究的目的:
- 在大鼠模型中研究 perfluorohexane sulfonate (PFHxS) 暴露对内分泌和神经发育的影响.
- 为了比较PFHxS与propylthiouracil (PTU) 的作用,这是已知的甲状腺介导发育神经毒性诱导剂.
- 评估PFHxS对母亲和幼甲状腺激素水平以及大脑甲状腺激素信号传递的影响.
主要方法:
- 孕妇,哺乳期和发育中的老鼠暴露于PFHxS和PTU.
- 在母体和幼中测量血清甲状腺素 (T4) 和甲状腺刺激激素 (TSH).
- 分析大脑TH水平,基因表达 (RNA测序),放射性质形态和行为表型.
主要成果:
- PFHxS显著降低了母体和幼血清T4水平,与PTU相比.
- PTU,但不是PFHxS,增加了TSH水平.
- PFHxS对大脑TH水平和作用的影响很小,与PTU不同,它大大降低了它们并破坏了TH信号传输.
结论:
- 暴露于PFHxS会改变大鼠的血清甲状腺激素概况,但不会在发育中的大脑中诱导甲状腺功能低下症.
- 与PTU不同,PFHxS似乎不会通过破坏甲状腺激素信号传递引起发育神经毒性.
- 神经发育效应的差异可能源于PFHxS与TH运输蛋白的相互作用,例如transthyretin.
关键词:
大脑发育 大脑发育甲状腺功能低下症 甲状腺功能低下症神经毒性 神经毒性-和多基基物质 (PFAS) 的使用.perfluorohexane 硫酸盐 (PFHxS) 是一种氧化硫酸盐.甲状腺作用 甲状腺作用更多相关视频
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