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中国临床药理学与治疗学 ›› 1999, Vol. 4 ›› Issue (2): 143-146.

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DDPH对多种介质所致豚鼠离体肠道平滑肌收缩的影响

胡国胜, 黄先菊   

  1. 湖北职工医学院, 剂州 434000
  • 收稿日期:1999-03-25 出版日期:1999-06-26 发布日期:2020-12-04
  • 作者简介:胡国胜,副教授,湖北省药理学会理事。

Inhibitory effects of DDPH on contraction of isolated ileum of guinea pigs induced by some mediators

HU Guo-Sheng, HUANG Xian-Ju   

  1. Department of pharmacology, Hubei Postgraduate Medical College, Jingzhou 434000
  • Received:1999-03-25 Online:1999-06-26 Published:2020-12-04

摘要: 目的 研究1-(2, 6-二甲基苯氧基)-2-(3, 4-二甲氧基苯乙氨基)丙烷盐酸盐(DDPH)对多种介质引起的豚鼠离体肠道平滑肌收缩的影响。方法 肠道平滑肌实验法。结果 不同剂量的DDPH 可非竞争性抑制磷酸组胺、氯化乙酰胆碱及Ca2+的作用, 使量效曲线非平行右移, 最大反应压低, 其pD2'值分别为4.0、3.8、3.9。DDPH 还可抑制K+所致肠道平滑肌收缩, 但作用较维拉帕米弱, IC50 值分别为2.7μmol·L-1 和0.7 μmol·L-1结论 DDPH通过非竞争性Ca2+拮抗作用使豚鼠回肠平滑肌松弛。

关键词: 回肠, 1-(2,6-二甲基苯氧基)-2-(3,4-二甲氧基苯乙氨基)丙烷盐酸盐, 氯化乙酰胆碱, 磷酸组胺, 氯化钙, 维拉帕米

Abstract: Aim To investigate the effects of 1-(2, 6-dimethy lphenoxy)-2-(3, 4-dime thox ypheny-lethy lamino)pro pane hydrochloride (DDPH)on cont raction of isolated ileum of guinea pigs induced by some mediators.Methods The routine methods for experiment on contraction-effect of the isolated ileum were emplayed.Results Histamine, acetyl choline and CaCl2 separetely caused a significant cumulative concentration-related effect on ileum constraction with the pD2 values being 7.7、9.8 and 5.3 respectively.after being incubated with DDPH of different dosage for 15 min, the responses elicited by Hist.ACh and CaCl2 were depressed and the pD2'values were 4.0, 3.8 and 3.9 respectively.Cumulative concent ration of DDPH and verapamil Resulted in a concentration dependent relaxing effect on contraction of ileum induced by K+ 60 mmol·L-1 with the IC50 values being 2.7 μmol·L-1 and 0.7 μmol·L-1. Conclusion DDPH has significant relaxing effect and a calcium antagonistic effect on ileum.

Key words: DDPH, verapamile, histamine, acetylcholine, calcium chloride, ileum

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