cilansetron has been researched along with Disease-Models--Animal* in 1 studies
1 other study(ies) available for cilansetron and Disease-Models--Animal
| Article | Year |
|---|---|
Effect of ramosetron on conditioned emotional stress-induced colonic dysfunction as a model of irritable bowel syndrome in rats.
The aim of this study was to establish a pathophysiologic model of irritable bowel syndrome, and then to evaluate the pharmaceutical efficacy of ramosetron, a potent serotonin 3 (5-HT(3)) receptor antagonist, and other anti-irritable bowel syndrome agents in this model. Rats stressed by a conditioned stress procedure exhibited marked prolongation of freezing time, an index of fear level, and an increase in the frequency of defecation (P<0.01). A corticotropin-releasing factor (CRF) antagonist, alpha-helical CRF, inhibited both defecation and freezing behavior, while the antidiarrheal loperamide inhibited defecation only. The 5-HT(3) receptor antagonists ramosetron, cilansetron and alosetron also inhibited defecation (ED(50) values: 0.012, 0.094, 0.078 mg/kg p.o., respectively) without affecting freezing behavior. Ramosetron showed longer-lasting effect on defecation than cilansetron. Stress also resulted in increases in both proximal and distal colonic transit rates. Ramosetron and other 5-HT(3) receptor antagonists at doses inhibiting stress-induced defecation also ameliorated both stress-stimulated colonic transit rates. These results suggest that ramosetron, as well as agents used for the treatment of irritable bowel syndrome with diarrhea, has beneficial effects against emotional stress-induced colonic dysfunction. Furthermore, this emotional stress model may be useful in evaluation of drugs to treat irritable bowel syndrome presenting with diarrhea. Topics: Animals; Behavior, Animal; Benzimidazoles; Carbazoles; Carbolines; Colon; Colonic Diseases, Functional; Conditioning, Psychological; Corticotropin-Releasing Hormone; Defecation; Disease Models, Animal; Dose-Response Relationship, Drug; Fear; Gastrointestinal Transit; Immobilization; Irritable Bowel Syndrome; Loperamide; Male; Peptide Fragments; Pyridines; Rats; Rats, Sprague-Dawley; Receptors, Serotonin, 5-HT3; Serotonin 5-HT3 Receptor Antagonists; Serotonin Antagonists; Stress, Psychological; Time Factors; Treatment Outcome | 2007 |