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中国临床药理学与治疗学 ›› 2000, Vol. 5 ›› Issue (3): 207-209.

• 论著 • 上一篇    下一篇

左旋荷包牡丹碱对猪冠状动脉条收缩效应的影响1

李惠兰, 苏彦宏2, 李仲铭, 张荣平   

  1. 昆明医学院药理教研室,2附属第一医院心内科,昆明650031
  • 收稿日期:2000-03-10 修回日期:2000-04-13 出版日期:2000-09-26 发布日期:2020-11-25
  • 作者简介:李惠兰,教授,从事药理学教学及研究。
  • 基金资助:
    1云南省天然药物重点实验室资助课题(№:971220),云南省教委资助课题(№:9712122)

Effect of L-dicentrine on contractility of the sprips of porcine coronary artery

LI Hui-Lan, SU Yan-Hong, LI Zhong-Min, ZHANG Rong-Ping   

  1. Department of Pharmacology, Kunming Medical College, Kunming 650031
  • Received:2000-03-10 Revised:2000-04-13 Online:2000-09-26 Published:2020-11-25

摘要: 目的 观察左旋荷包牡丹碱(L-dicentrine,L-D)对K+、5-HT 、Hist、Ca2+引起的猪冠状动脉条收缩效应的影响。方法 利用猪冠状动脉条的离体实验法,观察对其收缩的影响。结果 L-D对K+、5-HT、Hist、Ca 2+诱发的猪冠状动脉平滑肌的收缩有显著的拮抗作用,量效曲线显示:L-D呈现非竞争性拮抗方式。在无Ca2+液中,L-D 能抑制5-HT 诱发的猪冠状动脉收缩,说明5-HT对猪冠状动脉依赖细胞内Ca2+所致的收缩有明显的抑制作用,而对外Ca2+所致的收缩无明显的影响。结论 L-D 具有松弛猪冠状动脉条的作用,同时也提示冠状动脉平滑肌可能存在5-HT受体。

关键词: 左旋荷包牡丹碱, 冠状动脉, 解痉

Abstract: Aim & methods The antagonism of L-dicentrine to contraction of isolated porcine coronary artery strips induced by 5-HT KCl and Ca2+was observed with U-135 electrophsiological recorder.Results The contract ions induced by 5-HT KCl and Ca2+after high K+depolarization in the strips of porcine coronary artery were markediy inhibited by L-dicentrine. L-dicentrine significantly depressed maximal response and caused rightward displacement of the dose-response curve.Showing a non-competitive antagonism.In Ca2+free solution, L-dicentrine inhibited 5-HT-induced contraction of porcine coronary artery ,which is dependent on Ca2+relesed from intracellular store.After Ca2+concentration in bath solution was restored, L-dicentrine did not influence the contraction of porcine coronary artery depending on extracellular Ca2+.Conclusion L-D have significant relaxation on porcine coronary artery ,which possibly has 5-HT receptor and histamine receptor.

Key words: L-dicentrine porcine, coronary artery, relaxation

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