Impact of insulin and glucocorticoid signalling on hepatic glucose homeostasis in the rat exposed to high-fructose diet and chronic stress.

Détails

ID Serval
serval:BIB_82CB8C95C224
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Impact of insulin and glucocorticoid signalling on hepatic glucose homeostasis in the rat exposed to high-fructose diet and chronic stress.
Périodique
International journal of food sciences and nutrition
Auteur⸱e⸱s
Teofilović A., Brkljačić J., Djordjevic A., VojnovićMilutinović D., Tappy L., Matić G., Veličković N.
ISSN
1465-3478 (Electronic)
ISSN-L
0963-7486
Statut éditorial
Publié
Date de publication
11/2020
Peer-reviewed
Oui
Volume
71
Numéro
7
Pages
815-825
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Overconsumption of fructose-enriched beverages and everyday stress are involved in the pathogenesis of metabolic disorders through modulation of hepatic glucose metabolism. The aim of the study was to investigate whether interaction of high-fructose diet and chronic stress alter insulin and glucocorticoid signalling thus affecting hepatic glucose homeostasis. High-fructose diet led to hyperinsulinemia, increased glucose transporter 2 level, elevated protein kinase B (Akt) phosphorylation, increased glucokinase mRNA and phospho-to-total glycogen synthase kinase 3 ratio and decreased expression of gluconeogenic genes. Fructose diet also led to stimulated glucocorticoid prereceptor metabolism, but downstream signalling remained unchanged due to increased glucocorticoid clearance. Stress did not affect hepatic insulin and glucocorticoid signalling nor glucose metabolism, while the interaction of the factors was observed only for glucokinase expression. The results suggest that, under conditions of fructose-induced hyperinsulinemia, suppression of gluconeogenesis and glycogen synthase activation contribute to the maintenance of glucose homeostasis. The increased glucocorticoid inactivation may represent an adaptive mechanism to prevent hyperglycaemia.
Mots-clé
Animals, Dietary Sugars/administration & dosage, Dose-Response Relationship, Drug, Fructose/administration & dosage, Gene Expression Regulation/drug effects, Glucocorticoids/metabolism, Glucose/metabolism, Homeostasis/drug effects, Insulin/genetics, Insulin/metabolism, Liver/drug effects, Liver/metabolism, Male, Rats, Rats, Wistar, Signal Transduction/drug effects, Stress, Physiological, 11β-hydroxysteroid dehydrogenase type 1, 5α-reductase, Insulin, corticosterone, glucokinase
Pubmed
Web of science
Création de la notice
20/02/2020 15:29
Dernière modification de la notice
16/04/2024 6:12
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