葡萄皮质类药物通过A549细胞中的Bcl-2/GR复合体缓解颗粒物诱导的COX-2表达和线粒体功能障碍
Yeon-Ji Park1,2, June Heo1,2, Yonghyeon Kim1,2
1Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea.
Scientific reports
|November 3, 2023
概括
葡萄糖皮质类药物通过葡萄糖皮质类受体 (GR) 调节循环氧化酶-2 (COX-2) 途径和线粒体功能,抑制颗粒物 (PM) 诱导的肺炎. 这涉及减少活性氧物种 (ROS) 和增强Bcl-2/GR复合体.
科学领域:
- 环境健康 环境健康
- 细胞生物学 细胞生物学
- 分子药理学分子药理学
背景情况:
- 暴露于颗粒物 (PM) 诱导线粒体功能障碍和肺炎.
- 循环氧化酶-2 (COX-2) 途径在炎症和线粒体平衡中发挥着至关重要的作用.
- 在PM暴露期间通过葡萄糖皮质体受体 (GR) 抑制COX-2的机制尚不清楚.
研究的目的:
- 阐明德克萨梅他抑制PM诱导的COX-2/前列腺素E2 (PGE2) 途径在A549细胞中的机制.
- 研究反应性氧物种 (ROS) 在PM诱导的COX-2表达中的作用.
- 检查葡萄糖皮质类药物对线粒体功能和GR-Bcl-2相互作用的影响.
主要方法:
- 用PM和德克萨米他对待A549细胞.
- 评估了COX-2蛋白,mRNA和促进剂活性.
- 葡萄糖皮质体受体抗剂RU486被用于阻止GR.
- 测量了反应性氧物种 (ROS) 水平和线粒体膜潜力.
- 分析了Bcl-2/GR复合物的形成.
主要成果:
- 德甲抑制了PM诱导的COX-2表达,而RU486.6阻断了这种效应.
- PM诱导的COX-2表达与ROS水平的增加相关;抗氧化剂取消了这种诱导.
- 暴露于颗粒物减少了线粒体膜的潜力,而这被德克萨米他逆转了.
- 葡萄糖皮质类药物增强了PM处理细胞中的Bcl-2/GR复合体的形成.
结论:
- 葡萄皮质类药物通过GR调节PM诱导的COX-2表达和线粒体功能障碍.
- ROS调解了PM诱导的COX-2表达.
- GR和Bcl-2之间的增强相互作用参与了葡萄糖皮质体的作用.
- COX-2/PGE2通路和GR-Bcl-2相互作用是PM诱导炎症的潜在治疗点.
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