Effect of indomethacin on electrical field stimulation-induced contractions of isolated transverse and longitudinal rat gastric fundus strips  

作　　者：Salimeh Afshin Mansoor Keshavarz Mahmood Salami Fatemeh Mirershadi Bijan Djahanguiri 

机构地区：[1]Department of Physiology School of Medicine, Tehran University of Medical Sciences, Tehran, Iran [2]Department of Physiology School of Medicine, Kashan University of Medical Sciences, Kashan, Iran [3]Department of Pharmacology School of Medicine, Tehran University of Medical Sciences, Tehran, Iran

出　　处：《World Journal of Gastroenterology》2005年第34期5358-5361,共4页世界胃肠病学杂志（英文版）

摘　　要：AIM: To study the effects of indomethacin on the isolated transverse and longitudinal rat gastric fundus strips.METHODS: The strips were suspended in an organ bath containing oxygenated Krebs solution, and contractile responses to electrical field stimulation were recorded on a physiograph in an isotonic manner after administration of cumulative concentrations of indomethacin. The effects of indomethacin on the strips pretreated with KATP channel modulators, diazoxide and glybenclamide were studied.RESULTS: Treatment of the transverse strips with indomethacin resulted in a concentration-dependent inhibitory response. In longitudinal strips, biphasic responses were seen, which included a stimulatory response at low concentrations of indomethacin, followed by an inhibitory response at higher concentrations.Diazoxide pre-treatment inhibited the stimulatory response of longitudinal strips. Glybenclamide pre-treatment not only blocked inhibitory effect of the low concentrations of indomethacin on transverse strips, but also increased the amplitude of contractions. Moreover, the drug decreased the amplitude of contractions in longitudinal strips.CONCLUSION: Responses of the isolated longitudinal and transverse rat gastric fundus strips to indomethacin are not similar, and are influenced by KATP channel modulators.AIM： To study the effects of indomethacin on the isolated transverse and longitudinal rat gastric fundus strips. METHODS： The strips were suspended in an organ bath containing oxygenated Krebs solution, and contractile responses to electrical field stimulation were recorded on a physiograph in an isotonic manner after administration of cumulative concentrations of indomethacin. The effects of indomethacin on the strips pretreated with KATP channel modulators, diazoxide and glybenclamide were studied. RESULTS： Treatment of the transverse strips with indomethacin resulted in a concentration-dependent inhibitory response. In longitudinal strips, biphasic responses were seen, which included a stimulatory response at low concentrations of indomethacin, followed by an inhibitory response at higher concentrations. Diazoxide pre-treatment inhibited the stimulatory response of longitudinal strips. Glybenclamide pre-treatment not only blocked inhibitory effect of the low concentrations of indomethacin on transverse strips, but also increased the amplitude of contractions. Moreover, the drug decreased the amplitude of contractions in longitudinal strips. CONCLUSION： Responses of the isolated longitudinal and transverse rat gastric fundus strips to indomethacin are not similar, and are influenced by KATP channel modulators.

关 键 词：Gastric fundus KATP channel INDOMETHACIN DIAZOXIDE Glybenclamide 

分 类 号：R573[医药卫生—消化系统] R975[医药卫生—内科学]