【摘要】 目的 观察胰岛素抵抗的的水平变化，探讨胰岛素抵抗脂肪细胞的分子机制。方法 体外培养前脂肪细胞, 并诱导其分化成熟,地塞米松诱导成熟脂肪细胞形成胰岛素抵抗，利用RT-PCR 技术检测和葡萄糖转运子4表达变化。结果 地塞米松作用于3T3-L1脂肪细胞葡萄糖消耗量明显降低, 地塞米松诱导的胰岛素抵抗状态下AMPK、PPARγ和GLUT4 mRNA表达水平显著下调。结论 地塞米松降低3T3-L1脂肪细胞葡萄糖消耗量产生胰岛素抵抗，提示其表达水平下降可能是3T3-L1脂肪细胞胰岛素抵抗原因之一。

    【关键词】地塞米松;3T3-L1脂肪细胞;胰岛素抵抗;腺苷酸活化蛋白激酶;过氧化物酶增殖受体γ;葡萄糖转运子4

    【Abstract】Objective To observe the changes of insulin resistance level, to investigate the molecular mechanism of insulin resistance adipocytes. Cultured preadipocytes in vitro, and induce its differentiation induced by dexamethasone in mature adipocytes,insulin resistance, change 4 expression was measured by RT-PCR technique and glucose transporter. Results dexamethasone effects on glucose consumption of 3T3-L1 cells decreased significantly, state AMPK, PPAR γ and GLUT4 mRNA expression was significantly lower in the dexamethasone induced insulin resistance. Conclusion dexamethasone reduced glucose consumption of 3T3-L1 fatty cells produce insulin resistance, suggesting that the gene expression level decreased may be one reason of insulin resistance in 3T3-L1 adipocytes ......