Abstract |
We examined the effects of YM-31636 (2-(1H-imidazol-4-ylmethyl)-8H-indeno[1,2-d] thiazole monofumarate), a newly synthesized 5-HT(3) receptor agonist, on defecation in normal and constipated ferrets, and evaluated it as an agent against constipation. YM-31636 facilitated defecation without inducing diarrhea or emetic episodes. This effect occurred within 1 h after oral administration, mostly within 30 min, whereas sodium picosulfate, a widely used laxative, tended to increase the frequency of defecation for several hours with much lower peak incidence than that of YM-31636, and induced diarrhea. UK14304 ( brimonidine), an alpha2 receptor agonist, and morphine reduced the frequency of defecation and YM-31636 restored it. These effects of YM-31636 were antagonized by ramosetron, a 5-HT(3) receptor antagonist. These results suggest that YM-31636 could be promising in the treatment of constipation. Because of an early and reliable onset of action compared with sodium picosulfate, YM-31636 could make it easier to control the time of defecation.
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Authors | H Ito, T Kiso, H Yuki, Y Naitoh, K Miyata, K Iwaoka, T Yamaguchi |
Journal | European journal of pharmacology
(Eur J Pharmacol)
Vol. 424
Issue 2
Pg. 151-7
(Jul 20 2001)
ISSN: 0014-2999 [Print] Netherlands |
PMID | 11476761
(Publication Type: Journal Article)
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Chemical References |
- 2-(1H-imidazol-4-ylmethyl)-8H-indeno(1,2-d)thiazole
- Citrates
- Organometallic Compounds
- Picolines
- Pyrroles
- Serotonin Receptor Agonists
- Thiazoles
- Water
- picosulfate sodium
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Topics |
- Animals
- Citrates
- Constipation
(physiopathology)
- Defecation
(drug effects)
- Dose-Response Relationship, Drug
- Feces
- Ferrets
- Male
- Nausea
(chemically induced)
- Organometallic Compounds
- Picolines
(pharmacology)
- Pyrroles
(adverse effects, pharmacology)
- Serotonin Receptor Agonists
(adverse effects, pharmacology)
- Thiazoles
(adverse effects, pharmacology)
- Time Factors
- Vomiting
(chemically induced)
- Water
(metabolism)
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