不同时间电刺激对C2C12肌管糖代谢的影响及其机制研究

The Effects of different time Electrical stimulation on Carbohydrate Metabolism in Skeletal Muscle Cell

  • 摘要: 以小鼠骨骼肌母细胞(C2C12)肌管为研究对象,测定不同时间电刺激对其AMPK、HK-Ⅱ、GS-1基因表达、以及GLUT4基因及蛋白表达等糖转运和代谢相关指标的变化,探讨不同收缩时间对骨骼肌细胞糖代谢的影响,以及这种影响的机制. 骨骼肌细胞的肌糖原消耗随刺激时间延长而增加,为了保证骨骼肌细胞糖消耗的需要,通过AMPK信号通路的调控,其膜对胞外糖转运的能力会随收缩时间增加而增强;骨骼肌细胞内糖原合成酶的合成则由于肌糖原储量的持续下降而增加.

     

    Abstract: The aim of this study was to measure the changes in cellular glucose intake and carbohydrate metabolism in mouse C2C12 skeletal muscle cells,so as to discuss the effect that skeletal muscle cells carbohydrate metabolism by electrical stimulation of different time as well as the possible mechanism. Glycogen consumption increased continuously with prolonged contraction of skeletal muscle cells.The capacity of glucose translocation across the cell membrane would be enhanced with the increase of contraction time. The activity of glycogen synthase might be increased due to declining muscle glycogen reserves after 60 and 120 min electrical stimulation.And all of these changes were possibly regulated by AMPK signaling pathway.

     

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