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

Details

Serval ID
serval:BIB_82CB8C95C224
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Impact of insulin and glucocorticoid signalling on hepatic glucose homeostasis in the rat exposed to high-fructose diet and chronic stress.
Journal
International journal of food sciences and nutrition
Author(s)
Teofilović A., Brkljačić J., Djordjevic A., VojnovićMilutinović D., Tappy L., Matić G., Veličković N.
ISSN
1465-3478 (Electronic)
ISSN-L
0963-7486
Publication state
Published
Issued date
11/2020
Peer-reviewed
Oui
Volume
71
Number
7
Pages
815-825
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
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.
Keywords
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
Create date
20/02/2020 16:29
Last modification date
16/04/2024 7:12
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