Sensitization by caerulein of guinea-pig ileum to contractions by acetylcholine, histamine, 5-hydroxytryptamine and nicotine
- PMID: 652052
- DOI: 10.1007/BF00586596
Sensitization by caerulein of guinea-pig ileum to contractions by acetylcholine, histamine, 5-hydroxytryptamine and nicotine
Abstract
Low concentrations (0.63 and 1.25 ng/ml) of caerulein increase the submaximal contractions of the guinea-pig isolated ileum induced by several agonists and electrical stimulation. These effects of the polypeptide are due partly to neuronal pathways (i.e., a ganglionic stimulation) and partly to a non specific muscular sensitization. At higher concentrations of caerulein the effects of all the agonists were decreased. This seems related to the contractile effect of the peptide itself on the longitudinal muscle which interfers non specifically with the development of contractions induced by any other agonist.
Similar articles
-
The effects of antiinflammatory steroids on the response of the guinea-pig isolated ileum to acetylcholine, histamine, nicotine, 5-hydroxytryptamine and electrical stimulation.Naunyn Schmiedebergs Arch Pharmacol. 1979 Nov;309(2):191-5. doi: 10.1007/BF00501228. Naunyn Schmiedebergs Arch Pharmacol. 1979. PMID: 522904
-
Further observations on the relaxant effect of caerulein on the guinea-pig ileum.J Pharm Pharmacol. 1974 Jun;26(6):461-2. doi: 10.1111/j.2042-7158.1974.tb09316.x. J Pharm Pharmacol. 1974. PMID: 4154995 No abstract available.
-
Enhancement by physalaemin of the contractions induced by cholinomimetics in the guinea-pig ileum.J Pharm Pharmacol. 1977 Jul;29(7):449-50. doi: 10.1111/j.2042-7158.1977.tb11366.x. J Pharm Pharmacol. 1977. PMID: 19590 No abstract available.
-
The effect of 6-azauridine on the contractile responses of the isolated ileum of the guinea-pig to drugs and to coaxial stimulation.J Pharm Pharmacol. 1966 Aug;18(8):501-6. doi: 10.1111/j.2042-7158.1966.tb07917.x. J Pharm Pharmacol. 1966. PMID: 4381855 No abstract available.
-
The effects of non-steroidal anti-inflammatory drugs on cholinergic and histamine-induced contractions of guinea-pig isolated ileum.Br J Pharmacol. 1977 Jun;60(2):165-71. doi: 10.1111/j.1476-5381.1977.tb07737.x. Br J Pharmacol. 1977. PMID: 880427 Free PMC article.