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Preliminary report Dose-responses for the slowing of gastric emptying in a rodent model by glucagon-like peptide (7–36)NH2, amylin, cholecystokinin, and other possible regulators of nutrient uptake

1996; Elsevier BV; Volume: 45; Issue: 1 Linguagem: Inglês

10.1016/s0026-0495(96)90192-4

1532-8600

Andrew A. Young, Bronislava Gedulin, T J Rink,

Gastrointestinal motility and disorders

Several peptides have been proposed as regulators of nutrient release from the stomach and subsequent uptake from the gut. Using a phenol red gavage method, we compared the potencies of subcutaneously preinjected amylin, glucagon-like peptide-1 (7-36)amide (GLP-1), cholecystokinin octapeptide (CCK-8), gastric inhibitory peptide (GIP), glucagon, and pancreatic peptide on slowing the release of an acaloric gel from rat stomach. The latter three peptides did not fully inhibit gastric emptying at subcutaneous doses up to 100 micrograms. Amylin, GLP-1, and CCK-8 fully inhibited gastric emptying, with ED50s of 0.42 +/- 0.07, 6.1 +/- 0.12, and 8.5 +/- 0.20 nmol/kg +/- SE of log, respectively.