基因X通过向GPX4来诱导子孙的血管内皮铁,以致于依赖于ubiquitination的降解
Jing Li1, Yuhui Cui2, Chengyi Zheng3,4
1Department of Pediatric, Central Hospital Affiliated to Shandong First Medical University, No. 105 Jiefang Road, Jinan 250021, China.
Current research in toxicology
|October 13, 2025
概括
孕期暴露于PFOA替代品GenX,通过诱导内皮细胞中的铁亡,导致后代血管发育不良. 这通过破坏关键的铁灭抑制剂GPX4的稳定性而发生,影响发育安全.
科学领域:
- 环境毒理学环境毒理学
- 发展生物学 发展生物学
- 血管生物学 血管生物学
背景情况:
- 作为PFOA的替代物,GenX是一种和多基基物质 (PFAS),在环境中广泛存在.
- 关于GenX的发育毒性,特别是它对血管发育的代际影响的数据有限.
研究的目的:
- 在小鼠中研究妊娠期GenX暴露的代际血管后果.
- 阐明基因X诱导的发育性血管毒性背后的分子机制.
主要方法:
- 怀孕期间,小鼠暴露于GenX.
- 对怀孕结果,胎盘结构和后代血管发育的评估.
- 对内皮细胞铁亡标记物的分析 (GSH,SOD,MDA,Fe2+,ROS).
- 研究GenX与GPX4的相互作用及其降解.
- GPX4过度表达的救援实验.
主要成果:
- 暴露于GenX导致了不良的妊娠结果,胎儿生长限制和胎盘功能障碍.
- 后代表现出全身血管发育不良,包括异常血管生成和内皮功能障碍.
- 通过耗尽GSH,抑制SOD,增加氧化应激,并直接针对GPX4进行降解,GenX在血管内皮细胞中诱导铁.
- 过度表达GPX4挽救了GenX诱导的铁死并恢复了血管平衡.
结论:
- 孕期GenX暴露会通过ferroptosis引起后代血管发育毒性.
- 通过破坏GPX4的稳定性,GenX破坏了血管发育,GPX4是ferroptosis的关键抑制剂.
- 这项研究强调需要重新评估GenX的发育安全性,并确定了涉及GPX4的新毒理学途径.
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