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The effect of exercise on ultrastructure of skeletal muscle in insulin resistant rats and its clinical significance
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF DIABETES
- Issue:
- 1
- DOI:
- 10.3969/j.issn.1006-6187.2010.01.019
- Key Word:
- 运动;胰岛素抵抗;骨骼肌;大鼠;有氧代谢
Abstract： 目的 观察胰岛素抵抗(IR)大鼠骨骼肌超微结构变化的特点,探讨高脂饮食及运动对骨骼肌的影响. 方法 健康Wismr雄性大鼠分基础饲料喂养组(NC),高脂饲料喂养组(HF).高脂喂养大鼠10周,构建IR动物模型.HF组再随机分出一半为非运动组,另一半为运动组,游泳运动干预4周.运动前后以钳夹技术评估IR大鼠胰岛素敏感性,检测3组大鼠葡萄糖输注率(GIR)以及股薄肌进行透射电镜观察. 结果 HF组大鼠GIR显著低于NC组(P<0.01),运动组大鼠GIR显著低于非运动组(P<0.01);电镜显示,HF组骨骼肌细胞肌原纤维束排列松散;线粒体数量减少;运动后可明显减轻上述病理改变. 结论 运动可增强骨骼肌的有氧代谢,改变IR大鼠骨骼肌超微结构,并以线粒体改变较为明显.适当的运动能够改善IR机体内胰岛素敏感性,维持骨骼肌细胞的正常形态.
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