Effect of GLP-1 on gastric volume, emptying, maximum volume ingested, and postprandial symptoms in humans

Silvia Delgado-Aros, Doe Young Kim, Duane D. Burton, George M. Thomforde, Debra Stephens, Benjamin H. Brinkmann, Adrian Vella, Michael Camilleri

Research output: Contribution to journalArticlepeer-review

173 Scopus citations


Glucagon-like peptide-1 (GLP-1) relaxes the stomach during fasting but decreases hunger and food consumption and retards gastric emptying. The interrelationships between volume, emptying, and postprandial symptoms in response to GLP-1 are unclear. We performed, in healthy human volunteers, a placebo-controlled study of the effects of intravenous GLP-1 on gastric volume using 99mTc-single photon emission computed tomography imaging, gastric emptying of a nutrient liquid meal (Ensure) using scintigraphy, maximum tolerated volume (MTV) of Ensure, and postprandial symptoms 30 min after MTV. The role of vagal cholinergic function in the effects of GLP-1 was assessed by human pancreatic polypeptide (HPP) response to the Ensure meal. GLP-1 increased fasting and postprandial gastric volumes and retarded gastric emptying; MTV and postprandial symptoms were not different compared with controls. Effects on postprandial gastric function were associated with reduced postprandial HPP levels. GLP-1 does not induce postprandial symptoms despite significant inhibition of gastric emptying and vagal function; this may be partly explained by the increase in postprandial gastric volume.

Original languageEnglish (US)
Pages (from-to)G424-G431
JournalAmerican Journal of Physiology - Gastrointestinal and Liver Physiology
Issue number3 45-3
StatePublished - 2002


  • Accommodation
  • Diabetes
  • Satiation
  • Single photon emission computed tomography
  • Vagus

ASJC Scopus subject areas

  • Physiology
  • Hepatology
  • Gastroenterology
  • Physiology (medical)


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