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中国临床药理学与治疗学 ›› 2004, Vol. 9 ›› Issue (12): 1393-1397.

• 研究原著 • 上一篇    下一篇

萘哌地尔衍生物BWYJ 扩张血管效应及其机理研究

王会玖1,2, 黄燮南1, 蒋青松1, 吴芹1, 孙安盛1, 石京山1   

  1. 1遵义医学院药理学教研室, 遵义 563003, 贵州;
    2安阳市人民医院心内科, 安阳 455000, 河南
  • 收稿日期:2004-09-03 修回日期:2004-11-09 出版日期:2004-12-26 发布日期:2020-11-19
  • 通讯作者: 黄燮南, 男, 博士研究生导师, 教授, 研究方向:心血管药理。Tel:0852-3118696 E-mail:jsshi@zmc.gz.cn
  • 作者简介:王会玖, 男, 硕士, 主治医师, 研究方向:心血管疾病的基础与临床研究。Tel:0372-5905870 E-mail:laojiu992001@yahoo.com.cn
  • 基金资助:
    贵州省科委基金资助项目(NoC-184)

Effects of naftopidil's ramification-BWYJ on vascular activities and it's vasodilative mechanism

WANG Hui-Jiu1,2, HUANG Xie-Nan1, JIANG Qing-Song1, WU Qin1, SUN An-Sheng1, SHI Jing-Shan1   

  1. 1Department of Pharmacology, Zunyi Medical College, Zunyi 563003, Guizhou, China;
    2Department of Cardiology, the People's Hospital of Anyang, Anyang 455000, Henan, China
  • Received:2004-09-03 Revised:2004-11-09 Online:2004-12-26 Published:2020-11-19

摘要: 目的: 观察萘哌地尔衍生物BWYJ 对家兔血管活动的影响, 并探讨其血管活性机理, 为该药的开发研究提供基础资料。方法: 采用家兔主动脉收缩的方法, 观察BWYJ 对去甲肾上腺素(NA)、5-羟色胺(5-HT) 和高钾量效曲线的影响;应用无Ca2+-复Ca2+的实验法, 以NA 和咖啡因为血管收缩剂, 间接观察BWYJ 对细胞内游离钙浓度([Ca2+]i) 的影响,并分析其可能作用机理。结果: BWYJ 10-7、3×10-7、10-6mol·L-1使NA 量效曲线明显平行右移, 而最大反应不变, pA2 值为7.61 。本品10-6、10-5 mol·L-1对5-HT 量效曲线也有同样的效应, pA2值为6.56 。而当剂量为3×10-6、10-5 mol·L-1时,对氯化钾(KCl) 量效曲线没有明显影响。在无钙Krebs 液中, BWYJ 10-7、3× 10-7、10-6 和10-5 mol·L-1呈浓度依赖性抑制NA 所致血管条的短暂收缩, 对复Ca2+后NA 所诱发的持续收缩也呈剂量依赖性抑制作用, 但其剂量达10-5 mol·L-1时尚不能抑制咖啡因在无Ca2+液中所致收缩。结论: BWYJ 可能是一种α受体阻断剂, 兼有拮抗5-HT 受体的作用。其扩血管的机理可能是通过阻断细胞膜上的α受体或5-HT 受体, 从而抑制这些受体中介的Ca2+内流和Ca2+释放所致。

关键词: 萘哌地尔, 细胞内游离钙, 兔胸主动脉条, 去甲肾上腺素, 5-羟色胺, 氯化钾

Abstract: AIM: To investigate the effects of BWYJ (naftopidil's ramification) on the vascular activities in rabbits and to explore its vasodilative mechanisms. METHODS: The isotonic contractions of the thoracic aorta strips in rabbits were recorded, and the effects of BWYJ on the concentration-response curves of noradrenaline (NA), high potassium and 5-hydroxytryptamine (5-HT) was observed.The procedure of Ca2+ free-Ca2+ addition was designed to indirectly observe the effects of BWYJ on intracellular free Ca2+ ([Ca2+]i).RESULTS: BWYJ shifted the concentration-response curves of NA and 5-HT to right in parallel, the maximum responses were unchanged, and the pA2 values were 7.61 and 6.56, respectively.But it did not affect the concentration-response curve of high potassium.In Ca2+-free medium, BWYJ 10-7, 3×10-7, 10-6 and 10-5mol·L-1concentration-dependently inhibited the transient contraction induced by NA and the long-lasting contraction induced by addition of Ca2+.But BWYJ 10-5mol·L-1did not inhibit the contraction induced by caffeine.CONCLUSION: BWYJ may be an α-adrenergic receptor blocker and a 5-HT receptor blocker simultaneously.The vasodilative mechanism of BWYJ may be related to its inhibiting effects on the Ca2+-influx and Ca2+-release mediated by α-adrenergic and 5-HT receptors.

Key words: naftopidil, thoracic aorta strips of rabbit, noradrenaline, KCl, 5-HT

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