吡格列酮对波动性高糖处理的人脐静脉内皮细胞脂联素受体表达的影响

目的探讨吡格列酮对波动性高糖处理的人脐静脉内皮细胞(HUVEC)脂联素受体(AdipoR1和AdipoR2)表达的影响。方法将HUVEC在波动性高糖培养液(5.5、20mmol.L-1每隔8h轮换1次)中培养5d后,随机分为阴性对照组、吡格列酮处理组(10、1与0.1μmol.L-1)和阳性对照组。应用实时定量PCR方法检测脂联素受体mRNA表达的改变。结果与波动性高糖组比较,吡格列酮处理后HU-VECAdipoR1表达增高。当吡格列酮浓度增至1μmol.L-1以上时,AdipoR1mRNA表达增加呈现差异。各组细胞Adi-poR2表达量间差别无显著性。结论AdipoR1很可能是胰岛素增敏剂吡格列酮改善内皮胰岛素敏感性的作用机制之

The effects of pioglitazone on the adiponectin receptors expression of HUVECs induced by intermittent high glucose

Aim To investigate the effect of pioglitazone on the AdipoR1 and AdipoR2 expression of HU-VECs induced by intermittent high glucose.Methods After exposed to intermittent high glucose for 5 d,HUVECs were incubated with pioglitazone(10,1 or 0.1 μmol·L-1) for 24 hours.The AdipoR1 and AdipoR2 mRNA expression levels in HUVECs were also determined by real-time PCR.Results After exposed to intermittent high glucose for 5 days,HUVECs were treated with pioglitazone(10,1 or 0.1 μmol·L-1) for 24 h.10,1μmol·L-1 of pioglitazone treatment enhanced AdipoR1 mRNA level(both P<0.05),which induced in a dose-dependent manner.But there is no effect on the level of AdipoR2.Conclusions Pioglitazone can inhibit significantly the downregulation of AdipoR1 in HUVECs induced by intermittent high glucose in a dose-dependent manner.The AdipoR1 may play an important role in adiponectin sensitivity amelioration of endothelial cells.