Postprandial Glucagon-like Peptide-1 (GLP-1) Response is Positively Associated with Changes in Neuronal Activity of Brain Areas Implicated in Satiety and Food Intake Regulation in Humans

Overview

Journal Neuroimage

Specialty Radiology

Date 2007 Feb 24

PMID 17317222

Citations 48

Authors

Nicola Pannacciulli

Duc Son N T Le

Arline D Salbe

Kewei Chen

Eric M Reiman

Pietro A Tataranni

Jonathan Krakoff

Affiliations

Soon will be listed here.

Abstract

Postprandial glucagon-like peptide-1 (GLP-1) secretion can act as a meal termination signal in animals and humans. We tested the hypothesis that the postprandial changes in plasma GLP-1 concentrations are associated with changes in the human brain activity in response to satiety by performing a post-hoc analysis of a cross-sectional study of neuroanatomical correlates of hunger and satiation using (15)O-water positron-emission tomography (PET). Forty-two subjects (22M/20F, age 31+/-8 years) spanning a wide range of adiposity (body fat: 7-44%) were included in this analysis. Outcome measures included changes in PET-measured regional cerebral blood flow (rCBF) and plasma concentrations of GLP-1, glucose, insulin, and free-fatty acids (FFA), elicited by the administration of a satiating amount of a liquid formula meal. The peak postprandial increases in plasma GLP-1 concentrations were correlated with increases in rCBF in the left dorsolateral prefrontal cortex (including the left middle and inferior frontal gyri), previously implicated in PET studies of human satiation, and the hypothalamus, previously implicated in the regulation of food intake in animal and human studies, both before and after adjustment for sex, age, body fat, and changes in plasma glucose, insulin, and serum FFA concentrations. The postprandial GLP-1 response is associated with activation of areas of the human brain previously implicated in satiation and food intake regulation.

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