赛尔图因-3激活了线粒体展开的蛋白质反应,并减少了脑缺血/再损伤
Xie Xiaowei1,2, Xu Qian3, Zhou Dingzhou1
1Department of Neurosurgery, Hunan Provincial People' s Hospital (The First-Affiliated Hospital of Hunan Normal University), Changsha 410005, Hunan Province, People's Republic of China.
International journal of biological sciences
|September 14, 2023
概括
塞尔图因-3 (Sirt3) 通过Foxo3/Sphk1通路激活线粒体展开蛋白反应 (UPR) 来保护中风后的大脑细胞,减少损伤并改善结果.
科学领域:
- 神经科学是一个神经科学.
- 线粒体生物学 线粒体生物学
- 生物化学 生物化学
背景情况:
- 锡尔图因-3 (Sirt3) 向参与大脑缺血/反 (I/R) 损伤的线粒体蛋白.
- 线粒体展开蛋白质反应 (UPR) 在压力下维持线粒体蛋白质稳定.
研究的目的:
- 调查Sirt3在脑后缺血功能障碍期间在UPRmt中的作用.
- 阐明Sirt3在脑I/R损伤中的神经保护作用背后的分子机制.
主要方法:
- 利用Sirt3转基因小鼠和一个短暂的中脑动脉封闭模型.
- 评估了心脏病发作的大小,神经炎症,神经活力,线粒体功能和ROS产量.
- 调查了分叉盒O3 (Foxo3) /神素激酶1 (Sphk1) 途径和UPR的参与.
主要成果:
- 在脑后缺血症中,Sirt3水平下降.
- 通过增强线粒体功能,Sirt3过度表达减少了心脏病发作大小,神经炎症,并改善了神经活力.
- 通过 Foxo3/Sphk1 途径,Sirt3 通过 UPRmt保护了线粒体.
- 过度表达的sphingosine kinase 1 (Sphk1) 模仿了Sirt3的保护作用.
结论:
- Sirt3/Foxo3/Sphk1通路激活了UPRmt,提供神经保护,防止缺血性中风.
- 准这种途径为缺血性中风治疗提供了一个有前途的治疗策略.
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