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环境剂量 MEOHP 通过混合EMT机制促进膀癌的进展:基于不良结果途径
Yuwei Wang1, Heng Ni2, Sitong Dong1
1Department of Toxicology of School of Public Health and Department of Gynecologic Oncology of Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China.
Environmental science & technology
|February 6, 2026
概括
通过尿路暴露于二甲基甲酸盐 (DEHP) 代谢物,单二甲基-5-甲基甲酸盐 (MEOHP),与增加膀癌症风险有关. MEOHP通过关键分子事件激活上皮质-介质酶过渡来促进癌症的进展.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 癌症研究 癌症研究
背景情况:
- 2-乙烯基) 甲酸盐 (DEHP) 是一种普遍存在的塑化剂污染物,已知有不良健康影响.
- 尿中DEHP代谢物对膀癌进展的影响尚不清楚.
研究的目的:
- 为了确定与膀癌风险相关的关键尿路增塑剂代谢物.
- 通过不良结果路径 (AOP) 框架,研究这些代谢物影响膀癌症进展的机制.
主要方法:
- 使用基于量子的g计算 (QGC) 模型与NHANES数据 (2005-2018) 分析尿路代谢物与膀癌风险之间的关联.
- 采用了体外实验,将人体膀癌细胞暴露在具有环境相关的单-2-乙基-5-氧赫西尔) 甲酸盐 (MEOHP) 度中.
- 研究的分子事件包括YAP和β-catenin核转位和上皮层-介质细胞过渡 (EMT) 激活.
主要成果:
- 在老年男性中,尿液增塑剂代谢物与膀癌风险之间发现了积极的关联.
- 确定DEHP的二次代谢物Mono(2-ethyl-5-oxohexyl) 甲酸盐 (MEOHP) 是主要的驱动因素.
- 暴露于100nM MEOHP诱导了膀癌细胞中的混合EMT表型.
- MEOHP暴露增加了YAP和β-catenin的核转移,维持了混合EMT表型.
结论:
- 这项研究提供了第一个证据,将可塑剂二次代谢物 (MEOHP) 与膀癌的进展联系起来.
- 环境暴露于MEOHP可能会对泌尿系统健康构成风险.
- 强调需要在环境化学品评估中考虑代谢物毒性.
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