通过二氧化物异构体对肠上皮质屏障完整性的阿里碳水化合物受体介导的破坏
Hideki Kakutani1, Teruyuki Nakao1
1Laboratory of Disease Prevention, Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata 573-0101, Osaka, Japan.
Toxics
|November 27, 2025
概括
持久性有机污染物 (POP) 通过激活酸受体 (AhR) 来破坏肠道屏障. 这项研究表明,POPs损害了肠道屏障功能,并揭示了胃肠功能障碍的机制.
科学领域:
- 环境毒理学环境毒理学
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
背景情况:
- 肠上皮是对毒素的关键屏障.
- 持久有机污染物 (POP) 是基碳化合物受体 (AhR) 连接体,对肠道完整性的影响尚不清楚.
研究的目的:
- 研究POPs对肠道屏障功能的影响.
- 为了阐明POP诱导的肠道屏障破坏背后的机制.
主要方法:
- 使用人类Caco-2细胞单层的体外研究.
- 在体内研究使用小鼠状环模型.
- 试验包括横体电阻,透性,细胞毒性和基因表达分析.
主要成果:
- 2,3,7,8-四二二氧化 (TCDD) 在非细胞毒性水平下损害了肠道屏障功能.
- TCDD的影响依赖于AhR,并涉及抑制的紧结蛋白表达 (claudin-1,claudin-4,ZO-1) 和slug上调.
- 在体内,TCDD增加了肠道透性,并减少了Claudin-4的表达.
结论:
- 肠道屏障破坏是POP暴露的敏感毒理结果.
- 通过AhR信号,POPs通过机械方式将环境污染物与胃肠功能障碍联系起来.
- 研究结果强调需要评估POPs对肠道健康的影响.
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