Relaxation of intestinal smooth muscle and calcium movements
- 1 January 1973
- journal article
- Published by Oxford University Press (OUP) in Journal of Pharmacy and Pharmacology
- Vol. 25 (1), 65-68
- https://doi.org/10.1111/j.2042-7158.1973.tb09117.x
Abstract
The effects of papaverine, isoprenaline and N6,2′-O-dibutyryl 3′,5′-cyclic adenosine monophosphate (DiBu.C-AMP) on calcium movements in the taenia from the guinea-pig caecum have been investigated and compared with the effects of phenylephrine. Papaverine and DiBu.C-AMP antagonized the contraction of KCl-depolarized muscle induced by CaCl2 and increased 45Ca-efflux from the taenia. Papaverine also significantly depressed 45Ca-uptake by this preparation. These findings suggest that papaverine impairs the availability of calcium to the contractile system and that there may be a correlation between relaxation and increase of 45Ca-efflux. The action of DiBu.C-AMP resembles that of papaverine but its potency is less.Keywords
This publication has 8 references indexed in Scilit:
- Effect of α- and β-Adrenergic Stimulation on the Uterine Motility and Adenosine 3′,5′-Monophosphate LevelCanadian Journal of Physiology and Pharmacology, 1971
- Non-competitive spasmolytics as antagonists of Ca++-induced smooth muscle contractionJournal of Pharmacy and Pharmacology, 1971
- Rapid procedure for liquid scintillation counting of animal tissues using a nitric acid digestion procedure and a dioxane-based scintillatorAnalytical Biochemistry, 1971
- Cyclic phosphodiesterase activity and the action of papaverineBiochemical and Biophysical Research Communications, 1970
- Einfluß von herz- und gefäßwirksamen Substanzen auf die Aktivität der PhosphodiesteraseNaunyn-Schmiedebergs Archiv für experimentelle Pathologie und Pharmakologie, 1969
- ACTIONS OF DOPAMINE AND ITS DERIVATIVES ON THE TAENIA CAECUM AND TRACHEAL MUSCLE FROM THE GUINEA PIG AND THE VAS DEFERENS FROM THE RATThe Japanese Journal of Pharmacology, 1969
- Antagonism between calcium ions and some myolytic agents on depolarized guinea-pig taenia coliJournal of Pharmacy and Pharmacology, 1968
- Determination of Extracellular Space in Amphibian MuscleThe Journal of general physiology, 1967