机构地区:[1]兰州大学第一医院心脏中心,甘肃省兰州市730000
出 处:《中国循环杂志》2016年第2期180-184,共5页Chinese Circulation Journal
基 金:兰州大学中央高校基本科研业务费专项资金资助(lzujbky-2013-218)
摘 要:目的:观察经静脉注射血管内皮抑制因子-2(vasostatin-2,VS-2)对时自发性高血压大鼠血流动力学的影响。方法:36只1±16周龄、体质量为160~250g的自发性高血压雄性大鼠分为6组:生理盐水组(n=6):经股静脉导管注入生理盐水(100gl/kg);儿茶酚抑素(catestatin)组(n=6):经股静脉导管注入catestatin(20μg/kg);极低剂量VS-2组(n=6):经股静脉导管注入VS-2(5μg/kg);低剂量VS-2组(n=6):经股静脉导管注入VS-2(10μg/kg);中等剂量VS-2组(n=6):经股静脉导管注入VS-2(20μg/kg);高剂量VS-2组(n=6):经股静脉导管注入VS-2(40μg/kg).利用清醒自由活动大鼠血流动力学动态监测技术监测静脉注射VS-2及catestatin对自发性高血压大鼠平均动脉压、心率及压力反射敏感性的影响。结果:与用药前相比,中等剂量VS-2及高剂量VS-2显著降低自发性高血压大鼠的心率、平均动脉压并升高压力反射敏感性[中等剂量VS-2组:(341.3±19.3)次/min vs(365.5±25.5)次/min、(133.0±8.9)mmHg(1mmHg=0.133kPa)vs(147.5±11.2)mmHg、(0.52±0.18)ms/mmHg vs(0.37±0.12)ms/mmHg;高剂量VS-2组:(348.8±30.8)次/min vs(374.5±34.8)次/min、(131.5±9.3)mmHg vs(151.7±10.8)mmHg、(0.53±0.05)ms/mmHg vs(0.38±0.03)ms/mmHg,P均〈0.01];catestatin也显著降低自发性高血压大鼠的心率、平均动脉压并升高压力反射敏感性[(318.7±13.4)次/min vs(365.5±25.5)次/min、(119.7±7.3)mmHg vs(147.5±11.2)mmHg、(0.58±0.15)ms/mmHg vs(0.35±0.11)ms/mmHg,P均〈0.01);同等剂量(20μg/kg)的VS-2与catestatin比较,VS-2对心率、平均动脉压的影响较弱[(341.3±19.3)次/min vs(318.7±13.4)次/min、(133.0±8.9)mmHg vs(119.7±7.3)mmHg,均P〈Objective: To observe the effect of the intravenous infusion of vasostatin-2 (VS-2) on hemodynamics in experimental rats with spontaneous hypertension (SH). Methods: A total of 36 (14-16) weeks male SH rats with the mean body weight at (160-250) g were randomly divided into 6 groups: (1) Control group, the rats received normal saline (100 μl/kg), (2) Catestatin (20 μtg/kg) group, (3) VS-2 (5 μg/kg) group, (4) VS-2 (10 μg/kg) group, (5) VS-2 (20 μg/kg) group and (6) VS-2 (40 μg/kg) group, n=6 in each group. The average blood pressure (BP), heart rate (HR) and baroreflex sensitivity (BRS) were monitored and compared upon VS-2 treatment and between VS-2 and catestatin treatments in conscious and freelance rats. Results: Compared with prior treatment, VS-2 (20 p.g/kg) and VS-2 (40 μg/kg) could obviously decrease the HR, BP and BRS in SH rats. In VS-2 (20 μg/kg) group, HR by bpm was (341.3 ± 19.3) vs (365.5 ± 25.5), BP by mmHg was (133.0 ± 8.9) vs (147.5 ± 11.2) and BRS by ms/mmHg was (0.52 ± 0.18) vs (0.37 ± 0.12); in VS-2 (40 μg/kg) group, HR was (348.8 ± 30.8) vs (374.5 ± 34.8), BP was (131.5 ± 9.3) vs (151.7 ± 10.8) and BRS was (0.53 ± 0.05) vs (0.38 ± 0.03), all P〈0.01. Catestatin treatment could also decrease the HR as (318.7 ± 13.4) vs (365.5 ± 25.5), BP as (119.7 ± 7.3) vs (147.5 ± 11.2) and BRS as (0.58 ± 0.15) vs (0.35 ± 0.11), all P〈0.01. Compared with catestatin (20 μg/kg), the rats received VS-2 (20 μg/kg) had the weaker reduction of HR as (318.7 ± 13.4) vs (341.3 ± 19.3), BP as (119.7 ± 7.3) vs (133.0 ± 8.9), all P〈0.01, while BRS was similar as (0.58 ± 0.15) vs (0.52 ± 0.18), P〉0.05. Conclusion: Intravenous infusion of VS-2 may obviously affect HR, BP and BRS in experimental SH rats; compared with the same dosage of catestatin, VS-2 had the weaker reductio
分 类 号:R54[医药卫生—心血管疾病]
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