缺氧通过紧密结蛋白重塑和增强的细胞泄漏破坏了人类支气管上皮屏障的完整性
Jianmin Huang1, Shan He2, Qiuyun Zhang1
1Department of Otorhinolaryngology, Fujian Children's Hospital (Fujian Branch of Shanghai Children's Medical Center), College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, 350011, Fujian, China.
European journal of medical research
|August 24, 2025
概括
持续的缺氧和香烟烟雾显著损害人的支气管上皮细胞,通过减少紧密结蛋白增加细胞死亡和损害屏障功能. 间歇性缺氧没有显著影响.
科学领域:
- 细胞生物学
- 呼吸系统医学
- 生理学
背景情况:
- 低氧会损害细胞和器官,导致细胞亡和疾病.
- 虽然肺缺氧已得到充分研究,但由于缺氧导致的支气管损伤仍然不太清楚.
- 这项研究研究了缺氧对人类支气管上皮细胞屏障功能和紧结蛋白的影响.
研究的目的:
- 确定持续和间歇性缺氧对人类支气管上皮细胞的影响.
- 在低氧条件下评估关键紧结蛋白 (ZO-1,ocludin,claudin-1) 的表达水平.
- 评估缺氧对支气管上皮细胞屏障完整性的影响.
主要方法:
- 主要人类支气管上皮细胞被暴露在控制,间歇性缺氧,持续性缺氧或香烟烟雾中.
- 使用流细胞计量测量了亡.
- 通过西式涂抹分析了紧结蛋白表达 (ZO-1,ocludin,claudin-1).
- 通过测量跨表皮电阻 (TEER) 来评估屏障功能.
主要成果:
- 与对照组相比,持续的缺氧和香烟烟雾显著增加了亡率.
- 持续的缺氧和烟雾暴露降低了TEER,表明屏障功能受损.
- 持续的缺氧导致克劳丁- 1的表达减少,而香烟烟雾降低了ZO- 1,奥克卢丁和克劳丁- 1水平.
- 间歇性缺氧没有显著改变细胞亡,TEER或紧结蛋白表达.
结论:
- 低氧显著影响人类支气管上皮细胞,破坏细胞间连接并增加透性.
- 持续的缺氧和吸烟会损害支气管上皮屏障的功能.
- 紧接蛋白调节是缺氧影响支气管上皮完整性的关键机制.
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