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不同强度运动对AMPKα2基因敲除小鼠骨骼肌葡萄糖运载体4表达的影响 被引量:6

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摘要 目的:探讨不同强度运动对AMPKα2基因敲除小鼠骨骼肌葡萄糖运载体4(GLUT4)基因和蛋白表达的影响。方法:野生和AMPKα2基因敲除小鼠各30只,并分别随机分为安静对照组、低强度(12m/min)跑台运动组和高强度(20m/min)跑台运动组,每组10只。运动时间均为1小时。运动后即刻取材,测定骨骼肌GLUT4基因和蛋白表达、AMPKα2蛋白表达以及肌糖原、血糖、血清胰岛素水平。结果:无论野生型还是AMPKα2基因敲除小鼠,1小时不同强度一次性跑台运动后GLUT4 mRNA含量与安静组相比均显著增加。无论安静状态或1小时不同强度跑台运动后,AMPKα2基因敲除小鼠GLUT4基因和蛋白含量与野生小鼠相比均无显著差异。1小时不同强度跑台运动后,AMPKα2基因敲除小鼠骨骼肌肌糖原含量均显著低于野生鼠。野生或AMPKα2基因敲除小鼠,低强度跑台运动组血糖含量显著低于安静组,而高强度跑台运动组与安静组相比无显著差异。结论:不同强度一次性运动后,敲除AMPKα2基因虽然影响了运动小鼠肌糖原的消耗,但未影响骨骼肌GLUT4基因和蛋白含量变化,提示AMPKα2可能并非是一次性运动诱导的骨骼肌GLUT4蛋白和基因含量变化的唯一调节信号。
机构地区 北京体育大学
出处 《中国运动医学杂志》 CAS CSCD 北大核心 2010年第4期467-471,共5页 Chinese Journal of Sports Medicine
基金 北京市自然科学基金课题(5072031)
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