Objective To explore the effects of visfatin in glucose metabolism by testing the expression of visfatin in liver of rats in different glucose metabolic statuses .Methods SD rats were randomly divided into five groups :normal control group (NC group) ,diet induce obesity group (DIO group) ,diabetes mellitus group (DM group) ,diabetes controlled by insulin group (INS group)and diabetes controlled by metformin group (MET group) .Tested the data of blood glucose (FPG) ,triglyceride(TG) ,total cholesterol(TC) ,free fat acid(FFA) ,fasting insulin(Fins) .The liver of rats was used to test visfatin ,glucose‐6‐phosphatase(G‐6‐pase) mRNA by RT‐PCR and visfatin ,AMP‐activated protein kinase‐α (AMPKα) ,phosphor‐AMP‐activated protein kinase‐α (p‐AMPKα) protein by Western blot .Results FBG of group DM increased than group NC and DIO (P< 0 .01) ;FBG of group INS and MET decresed than group DM (P < 0 .01) ;HOMA‐IR of group DIO and DM increased than group NC (P < 0 .01) ;HOMA‐IR of group DM increased than group DIO (P< 0 .01) .ISI of group DIO and DM decresed than group NC (P< 0 .01) ;ISI of group DM de‐creased than group DIO(P< 0 .01) .TG of group DIO increased than group NC (P< 0 .01) .TG of group INS and MET decreased than group DM (P< 0 .05) .The level of TG and TC of group DM ,INS and MET increased than group NC (P< 0 .05) .The level of serum FFA of group DM ,INS and MET were significantly higher than group NC (P < 0 .05) ;FFA of group DM increased than group DIO(P< 0 .05) .The expression of visfatin mRNA of group DM increased than group NC and DIO (P< 0 .05) ;visfatin mRNA of group INS and MET decreased than group DM (P< 0 .01) .Group DM ,INS and MET had a significantly higher level of G‐6‐Pase mRNA of than group DIO( P < 0 .05) ;Group MET had a significantly lower level of G‐6‐Pase mRNA of than group DM (P <0 .05) .The expression of visfatin protein of group DM ,INS and MET increased than group NC ( P < 0 .05) .The expression of AMPKα protein of group DM ,INS and MET decresed than group NC(P< 0 .05) ;AMPKα of group DM decresed than group DIO (P<0 .05) .The expression of p‐AMPKα protein of group DIO ,DM ,INS and MET decresed than group NC (P< 0 .01) .Conclusion The ex‐pression of visfatin in liver of SD rats might have something to do with insulin resistance and diabetes .We could′t consider that visfatin can affect the pathway of metformin activated AMPK to decrease blood glucose .%目的：检测糖尿病大鼠肝组织内脂素（visfatin）的表达，探讨内脂素在肝糖代谢的作用。方法雄性 SD 大鼠，分为5组：正常对照组（NC 组）、肥胖组（DIO 组）、糖尿病组（DM 组）、胰岛素治疗组（INS 组）、二甲双胍治疗组（MET 组）。检测大鼠空腹血糖（FPG）、总胆固醇（TC）、三酰甘油（TG）、游离脂肪酸（FFA ）、空腹胰岛素（Fins）水平；RT‐PCR 测定大鼠肝组织 visfatin 、葡萄糖6磷酸酶（G‐6‐Pase）mRNA 的水平，Western blot 检测 visfatin 、磷酸化腺苷酸活化蛋白激酶‐α（p‐AMPKα）和腺苷酸活化蛋白激酶‐α（AMPKα）蛋白表达量。结果 DM 组 FBG 较 NC 组、DIO 组均显著升高（P＜0．01）；INS 组、MET 组 FBG 较 DM 组显著下降（P＜0．01）。 DIO 组、DM 组 HOMA‐IR 均较 NC 组显著升高（P＜0．01）；DM 组 HOMA‐IR 较 DIO 组显著升高（P ＜0．01）。DIO 组、DM 组 ISI 均较 NC 显著降低（P＜0．01），DM 组 ISI 较 DIO 组显著降低（P＜0．01）。 DIO 组 TG 较 NC 组显著升高（P＜0．01）；INS 组、MET 组 TG 较 DM 组显著降低（P＜0．05），DM 组、INS 组、MET 组 TG 、TC 均较 NC 组升高（P＜0．05）。 DM 组、MET 组、INS 组 FFA 均较 NC 组明显升高（P＜0．05）；DM 组 FFA 较 DIO 组明显升高（P＜0．05）。 DM 组 visfatin mRNA 表达较NC 组、DIO 组显著升高（P＜0．05）；INS 组、MET 组 visfatin mRNA 较 DM 组显著降低（P ＜0．01）。 DM 组、MET 、INS 组 G‐6‐Pase mRNA 较 DIO 组显著升高（P＜0．05），MET 组 G‐6‐Pase mRNA 较 DM 组显著降低（P ＜0．05）。 DM 组、INS 组、MET 组visfatin 蛋白表达较 NC 组显著升高（P＜0．05）；DM 组、MET 组、INS 组 AMPKα蛋白表达较 NC 组显著降低（P＜0．05），DM 组AMPKα蛋白表达较 DIO 组显著降低（P ＜0．05）；DIO 组、DM 组、INS 组、MET 组 p‐AMPKα蛋白表达较 NC 组显著降低（P＜0．01）。结论大鼠肝组织 visfatin 表达可能与肝糖脂代谢有关联，visfatin 可能未参与到二甲双胍激活 AMPK 降低血糖的机制中。
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