Abstract
Perfluorooctane sulfonic acid (PFOS), as a potential endocrine disrupting chemical, is widely detected in the environment, wildlife and human. Currently few studies have documented the effects of chronic PFOS exposure on thyroid in aquatic organisms and the underlying mechanisms are largely unknown. The present study assessed the effect of chronic PFOS exposure on thyroid structure and function using zebrafish model. Zebrafish at 8 h post fertilization (hpf) were exposed to PFOS (250 µg/l) until 120 d post fertilization (dpf). Thyroid hormone (T3 and T4) level, thyroid morphology and thyroid function related gene expression were evaluated in zebrafish at 120 dpf. Our findings demonstrated that chronic PFOS exposure altered thyroid hormone level, thyroid follicular cell structure and thyroid hormone related gene expression, suggesting the validity of zebrafish as an alternative model for PFOS chronic toxicity screening.
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Acknowledgements
We thank Zhouxi Fang for technical help with TEM. This work was supported by the Key Project of Natural Science Foundation of Zhejiang Province (LZ13B070001) and the Natural Science Foundation of China (21277104 and 21307096) and the Science and Technology Project of Wenzhou (H20100062 and Y20170147).
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Chen, J., Zheng, L., Tian, L. et al. Chronic PFOS Exposure Disrupts Thyroid Structure and Function in Zebrafish. Bull Environ Contam Toxicol 101, 75–79 (2018). https://doi.org/10.1007/s00128-018-2359-8
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DOI: https://doi.org/10.1007/s00128-018-2359-8