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  • Title: GLP-1 and GLP-2 act in concert to inhibit fasted, but not fed, small bowel motility in the rat.
    Author: Bozkurt A, Näslund E, Holst JJ, Hellström PM.
    Journal: Regul Pept; 2002 Jul 15; 107(1-3):129-35. PubMed ID: 12137975.
    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.
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