福辛普利对自发性高血压大鼠氧化应激水平及血管功能的影响
2016-10-27刘正旺杨华杨振宇刘宜峰吴小翠张明
刘正旺, 杨华, 杨振宇, 刘宜峰,吴小翠, 张明
基础与实验研究
福辛普利对自发性高血压大鼠氧化应激水平及血管功能的影响
刘正旺, 杨华, 杨振宇, 刘宜峰,吴小翠, 张明
目的:探讨福辛普利对自发性高血压大鼠氧化应激水平及血管功能的影响。
方法:大鼠分3组:正常对照组(n=15)、自发性高血压组(高血压组,n=15)、自发性高血压福辛普利治疗组(治疗组,n=15)。治疗组每日予灌胃福辛普利[10 mg(/kg·d)],高血压组则予灌胃等体积生理盐水,每周测量尾动脉收缩压(SBP)。7周后检测血浆氧化物歧化酶(SOD)、血清活性氧(ROS)、丙二醛(MDA)、一氧化氮代谢产物(NO2-/NO3-)水平;并取胸主动脉,检测其对乙酰胆碱(Ach)/硝普钠(SNP)的舒张率。
结果:自第1周末开始至结束,治疗组的SBP较高血压组均显著下降(P<0.05)。7周后,高血压组的血浆SOD活性较正常对照组明显下降(P<0.05),而血清MDA及ROS水平则显著上升(P<0.05);但经福辛普利治疗后,治疗组大鼠的血浆SOD活性较高血压组有所上升(P=0.010),且MDA、ROS水平下降(MDA:P=0.021;ROS:P=0.009),差异均有统计学意义。高血压组NO2-/NO3-含量较正常对照组显著下降(P<0.001),高血压组和治疗组对Ach/SNP诱导的血管舒张率均较正常对照组显著下降(P<0.05)。治疗组血清NO2-/NO3-含量显著高于高血压组(P<0.001);对比高血压组,治疗组对Ach(P<0.001)诱导的血管舒张率有明显上升。
结论:福辛普利通过抗氧化应激改善血管舒张功能,可能是其发挥降压作用的机制之一。
福辛普利;大鼠,近交SHR;氧化应激; 血管舒张
Abstract
Objective: To explore the effects of fosinopril on oxidative stress and vascular function in experimental rats with spontaneous hypertension.
Methods: The rats were divided into 3 groups: Control group, with normal healthy rats (n=15), Spontaneous hypertension (SH)group (n=15), SH rats received intragastric administration of normal saline and Treatment group (n=15), SH rats received intragastric administration of fosinopril 10mg/(kg·d). All animals were treated for 7 weeks. Caudal artery systolic blood pressure (SBP) was measured at each week. blood levels of superoxide dismutase (SOD), reactive oxygen species (ROS), malonaldehyde (MDA) and NO2-/NO3- were determined in different groups respectively after 7 weeks. Moreover, thoracic aorta was taken to examine its diastolic reactive rate by acetylcholine (Ach)/sodium nitroprusside (SNP) induction.
Results: From the 1stweek until the end of experiment, compared with SH group, Treatment group had decreased SBP, P<0.05. With 7 weeks treatment, compared with Control group, SH group had decreased SOD activity, while increased protein levels of MDA and ROS, all P<0.05; compared with SH group, Treatment group showed elevated SOD activity (P=0.010), while reduced protein levels of MDA (P=0.021) and ROS (P=0.009). Compared with Control group, SH group had the lower content of NO2-/NO3-(P<0.001); both SH group and Treatment group had decreased diastolic rates by Ach/SNP induction, P<0.05. Compared with SH group, Treatment group presented the higher content of NO2-/NO3- and higher diastolic rate by Ach induction, all P<0.001.Conclusion: Fosinopril could improve vascular diastolic function via anti-oxidative stress in experimental SH rats, which might be one of its anti-hypertensive mechanisms.
(Chinese Circulation Journal, 2016,31:892.)
随着生活水平的提高,目前高血压病已成为我国中老年人最常见的疾病,而近年来研究认为,血管氧化应激反应是高血压病发生发展的重要机制之一[1,2]。……
