Effect of itopride hydrochloride on the ileal and colonic motility in Guinea pig in vitro

Hyun Chul Lim, Young Gyun Kim, Jung Hyun Lim, Hee Sun Kim, Hyojln Park

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


Purpose: Itopride hydrochloride (itopride) inhibits acetyl-cholinesterase (AChE) and antagonizes dopamine D2 receptor, and has been used as a gastroprokinetic agent. However, its prokinetic effect on the small bowel or colon Has not yet been thoroughly investigated. The aim of this study was to investigate the effects of itopride on motor functions of the ileum and colon in guinea pigs. Materials and Methods: The distal ileum was excised and the activity of peristaltic contraction was determined by measuring the amplitude and propagation velocity of peristaltic contraction. The distal colon was removed and connected to the chamber containing Krebs-Henseleit solution (K-H solution). Artificial fecal matter was inserted into the oral side of the lumen, and moved toward the anal side by intraluminal perfusion via peristaltic pump. Colonic transit times were measured by the time required for the artificial feces to move a total length of 10 cm with 2-cm intervals. Results: In the ileum, itopride accelerated peristaltic velocity at higher dosage (10-10-10-6 M) whereas neostigmine accelerated it only with a lower dosage (10-10-10-9 M). Dopamine (10-8 M) decelerated the velocity that was recovered by itopride infusion. Itopride and neostigmine significantly shortened colonic transit at a higher dosage (10-10-6 M). Dopamine (10-8 M) delayed colonic transit time that was also recovered after infusion of itopride. Conclusion: Itopride has prokinetic effects on both the ileum and colon, which are regulated through inhibitory effects on AChE and antagonistic effects on dopamine D2 receptor.

Original languageEnglish
Pages (from-to)472-478
Number of pages7
JournalYonsei medical journal
Issue number3
Publication statusPublished - 2008 Jun

All Science Journal Classification (ASJC) codes

  • Medicine(all)


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