目的探讨不同膳食模式对大鼠脂肪组织AMP激活的蛋白激酶(AMP-activated protein kinase,AMPK)表达的影响。方法高脂饲料喂养雄性SD大鼠实验组15w,按体重分为肥胖(DIO)和肥胖抵抗(DIO-R)组,再将DIO组一半改用基础饲料喂养(DIO-HF/LF),另...目的探讨不同膳食模式对大鼠脂肪组织AMP激活的蛋白激酶(AMP-activated protein kinase,AMPK)表达的影响。方法高脂饲料喂养雄性SD大鼠实验组15w,按体重分为肥胖(DIO)和肥胖抵抗(DIO-R)组,再将DIO组一半改用基础饲料喂养(DIO-HF/LF),另一半继续喂养高脂饮食(DIO-HF),DIO-R组继续喂养高脂饮食;以基础饲料喂养组作对照(CF)。至23w末禁食过夜处死动物,取脂肪组织,用RT-PCR法检测AMPKα1和AMPKα2 mRNA表达水平,免疫印迹法检测AMPKα蛋白水平。结果DIO-HF组大鼠体重和肾周、腰周、睾周脂肪湿重、三个部位总的脂肪湿重及脂体比均显著高于CF、DIO-HF/LF及DIO-R组,DIO-HF/LF组大鼠体重高于CF组。各组间AMPKα1 mRNA表达均无差异;DIO-HF组AMPKα2 mRNA表达及AMPKα蛋白表达水平显著低于CF、DIO-HF/LF及DIO-R组,而其余各组之间差异无统计学意义。结论脂肪组织AMPKα水平降低与饮食诱导大鼠肥胖密切相关,其中AMPKα2可能扮演重要角色。展开更多
基金This work was supported by the National Natural Science Foundation of China (No. 30270554) Key Item of Scientific Technol- ogy for Ministry of Education (No.01161)Natural Science Foundation of Xi'an Jiaotong University (No. 573021)