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mTOR在托洛二酸盐诱导的喘中调解呼吸道上皮层E-cadherin干扰
Lin Fu1, Lichang Chen2, Xianru Peng2
1Department of Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China.
哺乳动物的目标拉巴胺素 (mTOR) 途径驱动了空气道上皮质E-cadherin功能障碍在二酸 (TDI) 诱导的喘中. 通过拉巴胺素抑制mTOR可以恢复E-cadherin并缓解喘症状.
科学领域:
- 呼吸系统医学 呼吸系统医学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 乙素对呼吸道上皮质完整性至关重要,其下调与喘有关.
- 猛素 (mTOR) 信号传递的哺乳动物点与喘病因发生有关.
- 二酸 (TDI) 暴露模型喘,影响E-cadherin功能.
研究的目的:
- 调查mTOR信号通路在TDI诱导喘期间呼吸道上皮层E-cadherin功能障碍中的作用.
- 在这个喘模型中评估mTOR抑制的治疗潜力.
主要方法:
- 用TDI暴露来诱导雄性BALB/c小鼠和BEAS-2B气道上皮细胞系的喘.
- 治疗小鼠和细胞时使用了已知mTOR信号传递抑制剂拉巴素.
- 评估了mTOR酸化,p70s6k激活,呼吸道过度反应,炎症细胞计数,细胞因子释放 (IL-4,IL-5,IL-17) 和E-cadherin表达 (包括可溶性E-cadherin).
主要成果:
- 在体外和体外模型中,TDI暴露增加了mTOR信号激活 (p-mTOR,p-p70s6k).
- 拉巴胺治疗显著降低了BALF.的气道过敏反应,炎症 (中性恋,乙性恋) 和促炎性细胞因子释放.
- 拉帕米辛恢复了下调的E-cadherin表达,并降低了可溶性E-cadherin水平,表明对上皮损伤的保护.
结论:
- 在TDI诱导的喘中,mTOR信号通路在调解气道上皮质E-cadherin干扰方面发挥着关键作用.
- 拉巴胺抑制mTOR信号传递有效缓解喘症状,并恢复上皮屏障功能.
- 针对mTOR途径代表了管理与上皮功能障碍相关的喘的潜在治疗策略.
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