The relationship between serum leptin levels and insulin resistance in hypertensive and obesity patients / 中国组织工程研究

ABSTRACT

Objective To investigate the relationship between serum leptin levels and insulin resistance(IR)in obesity and hypertensive patients and their role on the occurrence of hypertension or/and obesity.Methods Serum glucose,insulin,total cholesterol(TC),triglycerides(TG),HDL－ C,LDL－ C,uricacid(Ur),insulin sensitivity index(ISI),urinary albumin excretion(UAE)and serum leptin concentrations were determined in 66 men with essential hypertension and 67 male normotensives.The correlations between leptin and IR,and they and body mass index (BMI),blood pressure and other parameters were analyzed.Results Serum leptin levels were signifcantly higher in hypertensive and obesity subjects than in normotensive and nonobesity ones.ISI of nonobesity was higher than obesity in normotensive group,but both obesity and nonobesity ISI was higher in normotensive group than in hypertensive one .No significant change in obesity and nonobesity was found for the decreased levels and ISI(r=－ 0.51,P<0.01 and r="－" 0.38,P< 0.05,respectively ) and the most singificant factors that affected serum leptin levels were BMI,waist hip ratio and ISI and the factors that affected ISI in order of importance were BMI,SBP,DBP,TG,Ur and leptin in obesity subjects of both hypertensive and ISI in above mentioned patients.The multiple regression analysis indicated that BMI was closely correlated with leptin,ISI and TG in obesity patients of both hypertensive and normotensive groups. Conclusion The increase in serum leptin levels in obesity is highly correlated with ISI and is correlated with lipid metabolism.leptin resisitance may has a indirect action in occrrence of hypertension and the correlation with IR remain to be sutdied.