PPARγ通过卡斯巴-3依赖的线粒体通路调节骨关节炎冠状细胞亡
Scientific reports
|May 16, 2024
概括
激活过氧体增殖器激活受体 (PPARγ) 可以通过减少细胞亡和细胞外基质降解来保护骨关节炎 (OA),提供潜在的治疗途径.
科学领域:
- 生物医学科学 生物医学科学
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 骨关节炎 (OA) 是一种普遍存在的退行性关节疾病.
- 由于氧化压力的慢性细胞亡是OA发病的一个关键因素.
- 氧酶增殖器激活受体玛 (PPARγ) 在OA进展中的作用尚未完全理解.
研究的目的:
- 调查PPARγ在OA中氧化应激诱导的状细胞亡中的作用.
- 阐明PPARγ影响OA病变的分子机制.
主要方法:
- 培养和分析了原发性人体冠状细胞 (正常和OA).
- 评估了细胞增殖,活力,细胞毒性,亡,活性氧物种 (ROS),氧化 (NO),线粒体膜潜能 (MMP) 和细胞染色体C释放.
- 评估了II型原蛋白 (Col2a1),aggrecan,可诱导氧化合成酶 (iNOS),caspase-9,caspase-3和PPARγ的基因和蛋白质表达.
主要成果:
- 在OA胆固醇细胞中,PPARγ表达的下调.
- 甲状腺冠状细胞表现出减少的增殖,增加的亡,增加的ROS和NO,以及减少的MMP.
- PPARγ激活 (GW1929) 或卡斯巴-3抑制 (Z-DEVD-FMK) 保护了冠状细胞免受亡并缓解了OA的进展.
结论:
- 氧化应激驱动慢性细胞亡和OA中的细胞外基质降解.
- PPARγ激活通过抑制酶-3依赖的线粒体亡途径来缓解OA的进展.
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