GLP-1 and GLP-2 act in concert to inhibit fasted, but not fed, small bowel motility in the rat

Bozkurt A., Näslund E., Holst J. J., Hellström P. M.

Regulatory Peptides, vol.107, no.1-3, pp.129-135, 2002 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 107 Issue: 1-3
  • Publication Date: 2002
  • Doi Number: 10.1016/s0167-0115(02)00095-2
  • Journal Name: Regulatory Peptides
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.129-135
  • Keywords: Glucagon-like peptides, Gut motility, Migrating myoelectric complex
  • Ondokuz Mayıs University Affiliated: No

Abstract

Small bowel motility was studied in rats at increasing (1-20 pmol/kg/min) intravenous doses of either glucagon-like peptide-1 (GLP-1) or glucagon-like peptide-2 (GLP-2) alone, or in combination in the fasted and fed state. There was a dose-dependent inhibitory action of GLP-1 on the migrating myoelectric complex (MMC), where the dose of 5 pmol/kg/min induced an increased MMC cycle length. No effect was seen with GLP-2 alone, but the combination of GLP-1 and GLP-2 induced a more pronounced inhibitory effect, with significant increase of the MMC cycle length from a dose of 2 pmol/kg/min. During fed motility, infusion of GLP-1 resulted in an inhibition of spiking activity compared to control. In contrast, infusion of GLP-2 only numerically increased spiking activity compared to control, while the combination of GLP-1 and GLP-2 resulted in no change compared to control. In summary, this study demonstrates an additive effect of peripheral administration of GLP-1 and GLP-2 on fasted small bowel motility. In the fed state, GLP-1 and GLP-2 seem to display counter-balancing effects on motility of the small intestine. © 2002 Elsevier Science B.V. All rights reserved.