Tomato Juice Supplementation Influences the Gene Expression Related to Steatosis in Rats

Area of Science:

• Nutritional Biochemistry
• Molecular Biology
• Toxicology

Background:

• Diet-induced steatosis is a growing health concern.
• Understanding the molecular mechanisms of dietary interventions is crucial.
• Tomato juice is rich in antioxidants like lycopene.

Purpose of the Study:

• To investigate the impact of tomato juice on gene expression and metabolite levels associated with steatosis in rats.
• To explore the potential protective effects of tomato juice against high-fat diet-induced liver changes.

Main Methods:

• Male Sprague Dawley rats were fed either a normal or high-fat diet, with or without tomato juice, for 5 weeks.
• Evaluated biochemical parameters, oxidative stress biomarkers, liver metabolites, and gene expression.
• Utilized metabolomics and gene expression analysis.

Main Results:

• High-fat diet induced dyslipidemia but not increased oxidative stress markers (isoprostanes, MDA).
• Tomato juice modulated gene expression differently based on diet, upregulating beta-oxidation genes and downregulating APOB and LPL.
• Lycopene in tomato juice upregulated FXR and HNF4A genes, potentially preventing steatosis, and enhanced antioxidant responses via glutathione and transsulfuration pathways.

Conclusions:

• Tomato juice consumption can modulate gene expression and metabolic pathways relevant to steatosis.
• Lycopene and other tomato components may possess protective effects against diet-induced liver abnormalities.
• Tomato juice enhances antioxidant defenses and influences lipid metabolism gene expression.