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肝细胞中烧伤诱导的线粒体功能障碍:受甲基化控制的J蛋白沉默的作用
Akshay Pratap1, Kenneth Meza Monge, Andrea C Qualman
1From the Division of Gastrointestinal, Trauma, and Endocrine Surgery, Department of Surgery (A.P., K.M.M., A.C.Q., E.J.K., J.-P.I.), Division of Burn Research (E.J.K.), and Division of Alcohol Research (E.J.K.), Department of Immunology and Microbiology, University of Colorado, Aurora, Colorado.
甲基化控制的J蛋白 (MCJ) 通过增加氧化应激和线粒体功能障碍,加剧烧伤后的肝损伤. 沉默MCJ保护肝细胞,这表明它可以.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 毒理学 毒理学 毒理学
背景情况:
- 烧伤导致全身炎症和器官损伤,特别是肝脏.
- 肝脏的免疫和代谢作用在烧伤后至关重要,需要采取预防肝功能障碍的策略.
- 甲基化控制的J蛋白 (MCJ) 是一种内部线粒体蛋白,与氧化应激和线粒体功能障碍有关.
研究的目的:
- 通过实验室模型研究MCJ在烧伤引起的肝损伤中的作用.
- 为了确定MCJ沉默是否可以减轻与烧伤相关的肝细胞损伤,氧化应激和线粒体功能障碍.
主要方法:
- 阿尔法老鼠肝12细胞被暴露在受烧伤小鼠 (SBIM) 的血清中,以模仿烧伤.
- 使用短毛RNA (shRNA) 沉默了MCJ.
- 分析了细胞活力,细胞亡,活性氧物种 (ROS),抗氧化反应,电子运输链 (ETC) 组件和线粒体呼吸.
主要成果:
- SBIM治疗降低了细胞活力,增加了细胞亡标志物和ROS水平.
- MCJ沉默显著改善了细胞活力,减少了细胞亡和ROS,并提高了抗氧化蛋白的调节.
- MCJ静音恢复了ETC组件,并增强了线粒体呼吸参数,包括基本和最大呼吸,ATP生产和备用呼吸能力.
结论:
- 通过促进细胞毒性,氧化应激和线粒体功能障碍,MCJ在烧伤引起的肝细胞损伤中发挥着关键作用.
- 沉默MCJ提供了对与烧伤相关的肝损伤的保护作用.
- 在烧伤患者中,MCJ代表了维护肝功能的潜在治疗标.
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