title: Dissociable Behavioral, Physiological and Neural Effects of Acute Glucose and Fructose Ingestion: A Pilot Study.
abstract: Previous research has revealed that glucose and fructose ingestion differentially modulate release of satiation hormones. Recent studies have begun to elucidate brain-gut interactions with neuroimaging approaches such as magnetic resonance imaging (MRI), but the neural mechanism underlying different behavioral and physiological effects of glucose and fructose are unclear. In this paper, we have used resting state functional MRI to explore whether acute glucose and fructose ingestion also induced dissociable effects in the neural system. Using a cross-over, double-blind, placebo-controlled design, we compared resting state functional connectivity (rsFC) strengths within the basal ganglia/limbic network in 12 healthy lean males. Each subject was administered fructose, glucose and placebo on three separate occasions. Subsequent correlation analysis was used to examine relations between rsFC findings and plasma concentrations of satiation hormones and subjective feelings of appetite. Glucose ingestion induced significantly greater elevations in plasma glucose, insulin, GLP-1 and GIP, while feelings of fullness increased and prospective food consumption decreased relative to fructose. Furthermore, glucose increased rsFC of the left caudatus and putamen, precuneus and lingual gyrus more than fructose, whereas within the basal ganglia/limbic network, fructose increased rsFC of the left amygdala, left hippocampus, right parahippocampus, orbitofrontal cortex and precentral gyrus more than glucose. Moreover, compared to fructose, the increased rsFC after glucose positively correlated with the glucose-induced increase in insulin. Our findings suggest that glucose and fructose induce dissociable effects on rsFC within the basal ganglia/limbic network, which are probably mediated by different insulin levels. A larger study would be recommended in order to confirm these findings.
authors.affiliation: Department of Gastroenterology, University Hospital of Basel, Basel, Switzerland.
authors.forename: Bettina Karin
authors.initials: BK
authors.lastname: Wölnerhanssen
authors.affiliation: Department of Gastroenterology, University Hospital of Basel, Basel, Switzerland.
authors.forename: Anne Christin
authors.initials: AC
authors.lastname: Meyer-Gerspach
authors.affiliation: Medical Image Analysis Center, University Hospital of Basel, Basel, Switzerland; Department of Psychiatry, University Hospital of Basel, Basel, Switzerland.
authors.forename: André
authors.initials: A
authors.lastname: Schmidt
authors.affiliation: Department of Gastroenterology, University Hospital of Basel, Basel, Switzerland.
authors.forename: Nina
authors.initials: N
authors.lastname: Zimak
authors.affiliation: Department of Surgery, St. Clara Hospital, Basel, Switzerland.
authors.forename: Ralph
authors.initials: R
authors.lastname: Peterli
authors.affiliation: Department of Gastroenterology, University Hospital of Basel, Basel, Switzerland.
authors.forename: Christoph
authors.initials: C
authors.lastname: Beglinger
authors.affiliation: Medical Image Analysis Center, University Hospital of Basel, Basel, Switzerland; Department of Psychiatry, University Hospital of Basel, Basel, Switzerland.
authors.forename: Stefan
authors.initials: S
authors.lastname: Borgwardt
mesh_terms: D001519:Behavior / Q000187:drug effects*; D004311:Double-Blind Method; D005632:Fructose / Q000008:administration & dosage*; D005947:Glucose / Q000008:administration & dosage*; D006801:Humans; D009420:Nervous System / Q000187:drug effects*; D010865:Pilot Projects; D010919:Placebos
chemical_list: D010919:Placebos; D005632:Fructose; D005947:Glucose