RESUMO
Objective To investigate the change of plasma visfatin level and the relationship of plasma visfatin level to body mass index(BMI),waist hip ratio(WHR),blood glucose,plasma insulin levels as well as other factors in the subjects with different glucose tolerances.Methods Fasting and glucose loading 2 h plasma visfatin levels were assayed by ELISA in patients with type 2 diabetes and impaired glucose tolerance(IGT),and controls.The relationship of plasma visfatin level with BMI,HOMA-IR,blood lipids,plasma glucose,plasma insulin,free fatty acids(FFA)levels were also analyzed.Results Fasting and glucose loading 2 h plasma visfatin levels in the type 2 diabetic patients were significantly reduced compared with controls[(11.63?7.48)?g/L vs (16.82?6.06)?g/L and (12.02?6.86)?g/L vs (16.26?7.78)?g/L,both P＜0.05],and the level of plasma visfatin in IGT was lower than that in diabetics and higher than controls.The level of visfatin in obese subjects was modestly higher than that in non-obese subjects,but the difference is not significant.Plasma visfatin level was positively correlated with WHR(r=0.42,P＜0.01),and negatively with 2 h plasma glucose after glucose loading(2hPG)and HbA_(1C)(r=-0.33,P＜0.01 and r=-0.25,both P＜0.05).Multiple regression analysis showed that fasting plasma glucose,WHR,2hPG,high density lipoprotein cholesterol and HbA_(1C) were independent related factors in influencing plasma visfatin levels.Conclusion The change of visfatin level is associated with glucose metabolism,which may contribute,in part,to the pathogenesis of diabetes and obesity.