산화질소 억제가 혈압, 심박동수 및 체중에 미치는 영향

Abstract

This study exarnined the physiological and histological changes in Sprague-Dawley rats with induced hypertension by chronic treatment of NG-nitro-L-arginine methyl ester(L-NAME), nitric oxide synthesis inhibitor. Systolic blood pressure of L-NAME treatement experimental group was significantly higher compared with untreated control group by 28.5%(44.2mmHg)(p<0.001). Changing rates on systolic blood pressure of L-NAME treated groups according to during L-NAME treatment period were significantly higher than control groups by 16.1% in 2weeks, 15.1% in 4weeks(p<0.05), 29.1% in 6weeks(p<0.01) and 28.5%(p<;0.001. However, heart rate and body weight did all not significant differ between L-NAME treated group and control group, between L-NAME posttreated rats and pretreated rats. Systolic blood pressure had each low correlation with heart rate and body weight. In conclusion, chronic inhibition of nitric oxide by L-NAME treatment had significant effect on systolic blood pressure, but not affect on heart rate and body weight. Thus, this study suggested that nitric oxide had important role to control for blood pressure and to modulation for function of organs associated with blood pressure.