Effects of Tegaserod on Ileal Peristalsis of Guinea Pig in Vitro

Sang Won Ji, Hyojin Park, Jun Pyo Chung, Sang In Lee, Young Ho Lee

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Abstract

The mechanisms of prokinetic action of tegaserod in the gastrointestinal tract has not been studied in detail. The aim of this study was to investigate the effect of tegaserod on peristaltic reflexes and propagating peristaltic waves in guinea pig ileum. A partitioned organ bath divided into three chambers was used to investigate the effect of tegaserod on peristaltic reflexes. A sensory stimulus was applied to the intermediate chamber, and changes in the circular muscle tension were monitored in a peripheral chamber. Another peristaltic bath was used to investigate the effect of tegaserod on peristaltic waves induced by intraluminal perfusion. Guinea pig ileum exhibited contractions in the circular muscle both orally and anally in response to mucosal stroking. Tegaserod (10-8 - 10-6 M) did not influence the maximal amplitude and the area under the curve of contraction both orally and anally to a mucosal stimulus. Intraluminal perfusion of fluid containing tegaserod (10-8 - 10-6 M) significantly increased the number of peristaltic waves in a concentration-dependent manner (P<0.05). Also, tegaserod (10-8 - 10-6 M) significantly increased the area under the curve of peristaltic waves (P<0.05). It is concluded that tegaserod has prokinetic action on guinea pig ileum by increasing the number of the circular muscle contractions during peristalsis.

Original languageEnglish
Pages (from-to)144-152
Number of pages9
JournalJournal of Pharmacological Sciences
Volume94
Issue number2
DOIs
Publication statusPublished - 2004 Feb 1

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All Science Journal Classification (ASJC) codes

  • Molecular Medicine
  • Pharmacology

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