Effects of ramosetron on gastrointestinal transit of guinea pig

Yoo Mi Park, Young Ju Lee, Young Ho Lee, Tae Il Kim, Hyojin Park

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Background/Aims A selective 5-hydroxytryptamine (5-HT) type 3 receptor antagonist, ramosetron, inhibits stress-induced abnormal defecation in animals and is currently used as a therapeutic drug for irritable bowel syndrome with diarrhea. The aim of this study is to investigate the effect of ramosetron on altered gastrointestinal (GI) transit. Methods Male guinea pigs weighing approximately 300 g were used. The effect of ramosetron was investigated on altered GI transit induced by thyrotropin-releasing hormone (TRH), 5-HT, or mustard oil (MO). GI transit was evaluated by the migration of charcoal mixture from the pylorus to the most distal point, and expressed as a percentage (%) of charcoal migration (cm) of the total length of total small intestine (cm). Results The average charcoal transit was 51.3 ± 20.1% in the control (vehicle) group, whereas in the ramosetron group charcoal moved 56.6 ± 21.9%, 46.9 ± 9.14% and 8.4 ± 5.6% of the total small intestine at the concentrations of 10, 30 and 100 μg/kg, respectively. GI transit after administration of TRH (100 μg/kg), 5-HT (10 mg/kg) or MO (10 mg/kg) was accelerated compared to vehicle (5-HT, 94.9 ± 9.22%; TRH, 73.4 ± 14.7%; MO, 81.0 ± 13.7%). Ramosetron inhibited GI transit altered by 5-HT, TRH or MO. Conclusions Ramosetron modulated GI transit. We suggest that ramosetron may be therapeutically useful for those with accelerated upper GI transit.

Original languageEnglish
Pages (from-to)36-41
Number of pages6
JournalJournal of Neurogastroenterology and Motility
Issue number1
Publication statusPublished - 2013 Jan

All Science Journal Classification (ASJC) codes

  • Clinical Neurology
  • Gastroenterology


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