Metabolic Effects of Fructose in Animal Models

Dietary fructose elicits a distinct metabolic response in rodents by bypassing key regulatory steps in glycolysis, leading to rapid hepatic phosphorylation, transient ATP depletion and elevated uric acid production. This cascade stimulates de novo lipogenesis, elevates triglyceride synthesis and promotes dyslipidaemia. In animal models consuming fructose beverages or diets enriched with fructose—often combined with high fat or high salt—researchers consistently observe insulin resistance, non-alcoholic fatty liver disease, visceral adiposity and hypertension. At the vascular level, fructose intake impairs endothelial function partly through oxidative stress and downregulation of endothelial nitric oxide synthase. Renal effects include enhanced sodium reabsorption and early fibrotic changes, contributing to long-term blood pressure elevation. Rodent studies have also revealed sex-specific differences in cardiorenal responses and highlighted the role of the renin-angiotensin system in mediating fructose-induced dysfunction. Emerging work in offspring of fructose-exposed parents suggests that early-life exposure programmes autonomic imbalance and predisposes to metabolic disturbances. These findings underscore the global health implications of rising fructose consumption and inform potential intervention strategies such as pharmacological inhibition of key pathways, lifestyle modifications and nutritional interventions to mitigate cardiometabolic risk.

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Metabolic Effects of Fructose in Animal Models publication trend

The graph below shows the total number of articles in metabolic effects of fructose in animal models across all publications each year (not limited to Nature Index journals).

Technical terms

De novo lipogenesis: The metabolic pathway by which excess carbohydrates are converted into fatty acids in the liver.

Insulin resistance: A state in which insulin’s ability to promote glucose uptake in muscle, liver and adipose tissue is diminished.

Renin-angiotensin system (RAS): A hormonal cascade that regulates blood pressure and fluid balance; often activated in high-salt and high-fructose conditions.

Oxidative stress: An imbalance between production of reactive oxygen species and the capacity of antioxidant systems to neutralise them.

Endothelial nitric oxide synthase (eNOS): An enzyme responsible for generation of nitric oxide in blood vessels, crucial for maintaining vascular tone and integrity.

Sympatho-vagal balance: The ratio of sympathetic to parasympathetic nervous system activity, often assessed via heart rate variability metrics.

References

1. Fructose: A Key Factor in the Development of Metabolic Syndrome and Hypertension. Journal of Nutrition and Metabolism (2013).
2. Fructose Beverage Consumption Induces a Metabolic Syndrome Phenotype in the Rat: A Systematic Review and Meta-Analysis. Nutrients (2016).
3. The Establishment of Metabolic Syndrome Model by Induction of Fructose Drinking Water in Male Wistar Rats. BioMed Research International (2014).
4. Metabolic Syndrome and Hypertension Resulting from Fructose Enriched Diet in Wistar Rats. BioMed Research International (2017).
5. Age-dependent effect of high-fructose and high-fat diets on lipid metabolism and lipid accumulation in liver and kidney of rats. Lipids in Health and Disease (2013).
6. Pathogenesis of Hypertension in Metabolic Syndrome: The Role of Fructose and Salt. International Journal of Molecular Sciences (2023).
7. Impact of inhibition of the renin-angiotensin system on early cardiac and renal abnormalities in Sprague Dawley rats fed short-term high fructose plus high salt diet. Frontiers in Nutrition (2024).
8. Impacts of High Fructose Diet and Chronic Exercise on Nitric Oxide Synthase and Oxidative Stress in Rat Kidney. Nutrients (2023).
9. Acetylcholinesterase Inhibitor Ameliorates Early Cardiometabolic Disorders in Fructose-Overloaded Rat Offspring. Pharmaceuticals (2024).