L-carnitine protects C2C12 cells against mitochondrial superoxide overproduction and cell death

• 作者: Arnaud Bernard Fran?oise Le Borgne Gaétan Ravaut Jean Demarquoy
• 来源期刊: 世界生物化学杂志：英文版（电子版）
• 学科: 医学
• 关键词: Superoxide 阴离子 线粒体 反应 Autophagy 肌肉 肉毒碱 氧种类 房间死亡
• 年，卷（期）: 2017,（1）
• 页码范围: 86-94
• 页数: 9页
• 分类号: R363

摘要

AIM To identify and characterize the protective effect that L-carnitine exerted against an oxidative stress in C2C12 cells.METHODS Myoblastic C2C12 cells were treated with menadione, a vitamin K analog that engenders oxidative stress, and the protective effect of L-carnitine(a nutrient involved in fatty acid metabolism and the control of the oxidative process), was assessed by monitoring various parameters related to the oxidative stress, autophagy and cell death. RESULTS Associated with its physiological function, a muscle cell metabolism is highly dependent on oxygen and may produce reactive oxygen species(ROS), especially under pathological conditions. High levels of ROS are known to induce injuries in cell structure as they interact at many levels in cell function. In C2C12 cells, a treatment with menadione induced a loss of transmembrane mitochondrial potential, an increase in mitochondrial production of ROS; it also induces autophagy and was able to provoke cell death. Pre-treatment of the cells with L-carnitine reduced ROS production, diminished autophagy and protected C2C12 cells against menadione-induced deleterious effects. CONCLUSION In conclusion, L-carnitine limits the oxidative stress in these cells and prevents cell death.