通过雌激素受体通路对结构上不同 PFAS 的雌激素活性
Fanglin Hu1, Tingyu Lu1, Minjie Li2,3
1College of Life Sciences, China Jiliang University, Zhejiang, Hangzhou, China.
这项研究揭示了包括 perfluorooctane sulfonamide (PFOSA) 在内的几个聚和 perfluoroalkyl 物质 (PFAS) 通过激活雌激素受体 (ER) 来表现出雌激素作用. PFOSA显示出最强的效果,强调需要评估PFAS超越PFOA,PFOS和PFHxS.
科学领域:
- 环境化学环境化学
- 毒理学 毒理学 毒理学
- 内分泌学 在内分泌学.
背景情况:
- 斯德哥尔摩公约要求逐步淘汰PFOA,PFOS和PFHxS等某些和多基物质 (PFAS).
- 其他PFAS在环境中的存在日益增加,需要了解它们的毒理特征.
- 不同 PFAS 的雌激素作用和机制在很大程度上仍然未被描述.
研究的目的:
- 研究和比较八种典型的PFAS的雌激素活性.
- 为了阐明PFAS诱导的雌激素的潜在分子机制.
- 评估雌激素受体 (ER) 在调解PFAS效应中的作用.
主要方法:
- 测试MCF-7细胞增殖测试以评估雌激素效应.
- 雌激素受体 (ER) 抗剂治疗以确认ER参与.
- 露西法酶记者基因测定和光竞争性结合测定,以评估ER激活和结合.
- 分子对接模拟以预测与ER的结合亲缘关系.
主要成果:
- 四种PFAS (PFOA,PFOS,PFHxS和PFOSA) 促进了MCF-7细胞的增殖,这表明它们具有雌激素活性.
- 在测试的化合物中, perfluorooctane sulfonamide (PFOSA) 显示出最强大的雌激素作用.
- PFOSA,PFOS和PFOA的雌激素活性下降,与它们的功能群相关 (硫胺 > 硫酸 > 碳酸).
- PFASs直接与雌激素受体 (ER) 结合并激活,通过多次测试和分子对接证实了这一点.
结论:
- 各种PFAS通过ER介导的途径产生雌激素作用.
- 受体结合亲和力是影响PFASs雌激素效能的关键因素.
- 由于其具有雌激素的潜力,PFOS前体和其他结构多样化的PFAS需要在环境风险评估方面更加关注.
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