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中国临床药理学与治疗学 ›› 2003, Vol. 8 ›› Issue (6): 662-665.

• 研究原著 • 上一篇    下一篇

缬沙坦对自发性高血压大鼠血管结构和舒缩功能的影响

王华军, 谢良地, 姚恩辉, 许昌声, 晋学庆, 吴可贵   

  1. 福建医科大学附属第一医院高血压研究所,福州 350005,福建
  • 收稿日期:2003-05-29 修回日期:2003-06-25 出版日期:2003-12-26 发布日期:2020-11-19
  • 通讯作者: 王华军,男,本科,福建省高血压研究所主管技师。Tel:0591-3357199-2756 E-mail:f zwhj@163.net
  • 基金资助:
    福建省科技厅项目(No2000Z127)

Effects of valsartan on the structure and function of vessels in spontaneously hypertensive rats

WANG Hua-Jun, XIELIang-Di, YAO En-Hui, XU Chang-Sheng, JIN Xue-Qing, WU Ke-Gui   

  1. Institute of Hypertension,First Affiliated Hospital,Fujian Medical University,Fuzhou 350005,Fujian,China
  • Received:2003-05-29 Revised:2003-06-25 Online:2003-12-26 Published:2020-11-19

摘要: 目的 观察缬沙坦对自发性高血压大鼠(SHR)的血压、血管功能和结构的影响。方法 30 只12 wk 龄雄性SHR,随机分成3 组,每组10 只:缬沙坦大剂量组(30 mg·kg-1·d-1);缬沙坦小剂量组(10 mg·kg-1·d-1);SHR 模型对照组,另设同龄雄性正常血压WKY 大鼠作为正常对照组(n=10)。用无创法测定尾动脉收缩压及心率,至给药4 wk 处死。测定胸主动脉、肠系膜动脉分支第三级血管壁(中膜)/腔面积比,并采用平衡记录仪记录离体的动脉环对血管活性药物去甲肾上腺素(NE)和硝普钠反应的敏感性。结果 与模型组相比,大、小剂量缬沙坦均能降低SHR 血压,肠系膜动脉壁肥厚明显改善(P<0 .01);大剂量明显减少主动脉腔壁比(P<0 .01),小剂量缬沙坦也可减少腔壁比,但无统计学意义;大、小剂量均能使胸主动脉及肠系膜动脉对硝普钠的舒张敏感性增加(P<0 .05),对NE 收缩的敏感性降低(P<0 .05)。结论 缬沙坦能改善SHR的非内皮依赖性血管舒张功能,使SHR 血管对循环〗活性物质的异常反应改善,并抑制SHR 的血管壁变厚。

关键词: 药效学, 高血压大鼠, 缬沙坦, 收缩功能, 舒张功能, 高血压

Abstract: AIM: To evaluate the effects of valsartan on the structure and function of vessels in spontaneously hypertensive rats(SHR).METHODS: 30 twelve-weekold male SHRs were divided into three groups at random:untreated control(n=10),low-dose valsartan(10mg·kg-1·d-1,n=10),and high-dose Valsartan(30mg·kg-1·d-1,n=10).Valsartan was given by gavage for 4 weeks,while SHR control and 10 age- and sexmatchedWistar Kyoto rats(WKY)were given water only.Systolic bloodPressure(SBP)was measured using tailcuff technique.Wall tolumen area ratios(Wl)of thoracic aorta and mesenteric artery(3rd grade branch)were assessed by morphormetic assay.The effect of valsartan on the vascular reactivity o the vasoactive substance:norepinephrine and sodium nitroprusside were studied by using rings of thoracic aorta and mesenteric arteries isolated from rats.RESULTS: After 4-week treatment,thelevels of SBPin both high andlow-dose groups were significantlylower than those in control grouP(P<0.05).The values of Wl of mesenteric artery in the two treatment groups were markedly reduced than those in the control grouP(P<0.05),and the values of Wl of thoracic aorta in the high -dose grouPwere markedly reduced than those in the control grouP(P<0.01).Both mesenteric artery and thoracic aorta in valsartan treated groups exhibited significantly depressed function of vasoconstriction response to noradrenaline and enhanced function of vasodilation to SNP.CONCLUSION: Valsartan can meliorate the function of resistant vessels by enhancing their sensitivity to vasodilator and depressing the sensitivity to vasoconstrictor;and also attenuate the resistant vascular hypertrophy during the development of hypertension in SHR.

Key words: pharmacodynamics, spontaneously hypertensive rats, valsartan, vasoconstriction, vasodilation, hypertension

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