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Effect of the 5-hydroxytryptamine3 (5-HT3)-receptor antagonist KB-R6933 on experimental diarrhea models.

Abstract
The effects of a 5-hydroxytryptamine3 (5-HT3)-receptor antagonist KB-R6933 (6-amino-5-chloro-1-isopropyl-2-(4-methyl-1-piperazinyl)-benzimidazole dimaleate) on experimental diarrhea and on intestinal fluid secretion stimulated by cholera toxin were examined and compared with those of ramosetron and loperamide. KB-R6933 and ramosetron (0.03-1 mg/kg, p.o.) inhibited the diarrhea induced by 5-HT, but not that by castor oil or prostaglandin E2 (PGE2), in mice. Loperamide significantly inhibited the diarrhea induced by 5-HT, castor oil and PGE2. All drugs tested inhibited the diarrhea induced by restraint stress and the intestinal fluid secretion stimulated by cholera toxin in rats. The results suggest the possibility that KB-R6933 may have clinical efficacy in the treatment of diarrhea.
AuthorsA Ozaki, M Yoshidomi, T Sukamoto
JournalJapanese journal of pharmacology (Jpn J Pharmacol) Vol. 80 Issue 1 Pg. 93-6 (May 1999) ISSN: 0021-5198 [Print] JAPAN
PMID10446763 (Publication Type: Comparative Study, Journal Article)
Chemical References
  • Antidiarrheals
  • Benzimidazoles
  • KB R6933
  • Receptors, Serotonin
  • Receptors, Serotonin, 5-HT3
  • Serotonin Antagonists
  • Serotonin
  • Loperamide
  • ramosetron
Topics
  • Animals
  • Antidiarrheals (therapeutic use)
  • Benzimidazoles (therapeutic use)
  • Diarrhea (chemically induced, drug therapy)
  • Loperamide (therapeutic use)
  • Male
  • Mice
  • Rats
  • Rats, Wistar
  • Receptors, Serotonin (drug effects, metabolism)
  • Receptors, Serotonin, 5-HT3
  • Serotonin (pharmacology)
  • Serotonin Antagonists (therapeutic use)

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