聚乙阻燃剂通过结合其细胞外域来抑制生长因子诱导的EGFR激活
Natalie C Sondermann1, Afaque A Momin2, Stefan T Arold2
1IUF - Leibniz-Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany.
Archives of toxicology
|December 12, 2024
概括
聚二乙烯 (PBDE) 是一种持久性环境污染物. 这项研究表明,PBDE与表皮生长因子受体 (EGFR) 结合,抑制其活性,并可能解释不良健康影响.
科学领域:
- 环境化学环境化学
- 分子生物学分子生物学
- 毒理学 毒理学 毒理学
背景情况:
- 聚二乙烯 (PBDE) 被广泛用作阻燃剂,并在环境中持续存在.
- 在野生动物和人类中检测到PBDE,研究将暴露与不良健康影响联系起来.
- 表皮生长因子受体 (EGFR) 参与细胞功能,已知与其他污染物相互作用.
研究的目的:
- 研究BDE-47和BDE-99对人体细胞上表皮生长因子受体 (EGFR) 活性的影响.
- 确定PBDE对健康有害影响的潜在作用机制.
- 探索EGFR作为PBDE的潜在细胞表面受体.
主要方法:
- 在体对接分析中预测结合相互作用.
- 基于AlphaLISA的测试用于研究受体结合.
- 通过SDS-PAGE和Western blot分析来评估蛋白质变化.
- 在人类角质细胞中进行实验,以评估细胞反应.
主要成果:
- 发现BDE-47和BDE-99与EGFR的细胞外域结合.
- PBDE 抑制了生长因子触发的EGFR激活.
- PBDE抑制了EGFR介导的DNA合成和基碳化合物受体信号传递在角质细胞中.
结论:
- EGFR被确定为PBDE的细胞表面受体.
- PBDE通过抑制EGFR活性来发挥其作用,从而提供了一种新的作用模式.
- 这一发现有助于评估PBDE和相关阻燃剂的危险性.
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