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Updated: Jun 17, 2026
A Model of Chronic Nutrient Infusion in the Rat
Published on: August 14, 2013
Chronic Stress Potentiates High Fructose-Induced Lipogenesis in Rat Liver and Kidney
Danijela Vojnović Milutinović1, Jelena Brkljačić1, Ana Teofilović1
1Department of Biochemistry, Institute for Biological Research "Siniša Stanković"-National Institute of Republic of Serbia, University of Belgrade, 142 Despot Stefan Blvd., Belgrade, 11000, Serbia.
Scope:
Intake of fructose-sweetened beverages and chronic stress (CS) both increase risk of cardiometabolic diseases. The aim is to investigate whether these factors synergistically perturb lipid metabolism in rat liver and kidney.
Methods And Results:
Fractional de novo lipogenesis (fDNL), intrahepatic- and intrarenal-triglycerides (IHTG and IRTG), de novo palmitate (DNPalm) content, FA composition, VLDL-TGs kinetics, and key metabolic gene expression at the end of the feeding and non-feeding phases in rats exposed to standard chow diet, chow diet + CS, 20% liquid high-fructose supplementation (HFr), or HFr+CS are measured. HFr induces hypertriglyceridemia, up-regulates fructose-metabolism and gluconeogenic enzymes, increases IHTG and DNPalm content in IHTG and IRTG, and augments fDNL at the end of the feeding phase. These changes are diminished after the non-feeding phase. CS does not exert such effects, but when combined with HFr, it reduces IHTG and visceral adiposity, enhances lipogenic gene expression and fDNL, and increases VLDL-DNPalm secretion.
Conclusion:
Liquid high-fructose supplementation increases IHTG and VLDL-TG secretion after the feeding phase, the latter being the result of stimulated hepatic and renal DNL. Chronic stress potentiates the effects of high fructose on fDNL and export of newly synthesized VLDL-TGs, and decreases fructose-induced intrahepatic TG accumulation after the feeding phase.
