RESUMO
AIM: The impaired function of vascular endothelial cells occurs popularly in hypertensive patients. Hepatocyte growth factor (HGF) plays a crucial role on impaired function, and is related to prevalence, severity and target organ damages of hypertension. This study explored the relationship between HGF gene C57488A polymorphism and essential hypertension (EH). METHODS: ①Between June and December in 2006, totally 107 EH patients with an average age of (61?9) years, in them 47 cases with family history of hypertension, were recruited in this study. Informed consents were obtained from the patients who were all the Han residents of Hefei area, and the experiment was approved by the hospital ethical committee. The hypertension criteria formulated by Chinese Medical Association included the systolic pressure ≥140 mm Hg or diastolic pressure ≥ 90 mm Hg (1 mm Hg=0.133 kPa), or having received drug therapy for hypertension over one year. The patients were administrated with hypotensive drugs with one month. Meanwhile 110 normotensives without family history of hypertension and drug therapy were served as controls, with an average age of (60?8) years. Inclusion criteria: systolic pressure 0.05).②The distributions of HGF gene C57488A polymorphism were in agreement with Hardy-Weinberg equilibrium, indicating population representativeness. The frequencies of three genotypes CC, CA, AA were 0.809, 0.170, 0.021 and C, A alleles were 0.894, 0.106 in the EH group with family history respectively. Correspondingly, the frequencies were 0.733, 0.233, 0.033 and 0.850, 0.150 respectively in the EH patients without family history. Meanwhile, the frequencies were 0.527, 0.355, 0.060 and 0.705, 0.295 respectively in the controls.③The frequencies of genotype CC and allele C were both significant higher in EH with or without family history compared with the controls (P 0.05). CONCLUSION: HGF gene C57488A polymorphism is possibly associated with EH, and genotype CC and allele C may be the factors of genetic predisposition of EH in Han population of Hefei area.
RESUMO
Aim To evalute the effects of losartan on the cardiac function and secretion of nitric oxide(NO)and endothelin(ET)in patients with congestive heart failure(CHF).Methods Sixty patients with class Ⅱ～Ⅳ CHF were randomised to receive a 12 weeks of routine therapy either with losartan(n=30)to be added from 25 mg to 50 mg daily or with enalapril(n=30)to be added from 2.5 mg to 5 mg daily. The cardiac systolic and diastolic funtion and the levels of NO and ET were observed before and after therapy respectively, with 30 normal control subjects seving as control. Results The abnormal cardiac systolic and diastolic function parameter were present in patients with CHF. The ET and NO levels in CHF patients were significantly higher than those in the control group(P