# A Cross-Sectional Quantitative Metabolomics Study Evidencing the Metabolic Signature in Six Organs during a 14-Week High-Fat High-Sucrose and Standard Diet in Mice

## TL;DR

This study uses metabolomics to track how a high-fat, high-sucrose diet affects metabolism in six organs of mice over time.

## Contribution

The study identifies diet- and age-related metabolic signatures in multiple organs during early life in mice.

## Key findings

- Metabolite concentrations in the liver and lung were significantly affected by the high-fat, high-sucrose diet.
- Age-related changes in metabolite levels were observed even in mice on a standard diet.
- The study highlights the importance of considering age as a confounding factor in metabolic research.

## Abstract

Obesity is a risk factor for many diseases, such as type 2 diabetes and cardiovascular diseases. In line with the need for precision medicine, the search for biomarkers reporting the progression of obesity- and diet-associated disorders is urgent. We used NMR to determine the metabolomics profile of key organs (lung, liver, heart, skeletal muscle, kidney, and brain) and serum from male C57Bl/6J mice (5 weeks old) fed for 6, 10, and 14 weeks on a high-fat and high-sucrose diet (HFHSD) vs. a standard diet (STD). We determined metabolite concentrations in the organs at each time point, which allowed us to discriminate age- and diet-related effects as well as the interactions between both, highlighting the need to evaluate the influence of age as a confounding factor on metabolic signatures. Notably, the analysis revealed the influence of time on metabolite concentrations in the STD condition, probably reflecting the juvenile-to-adult transition. Variations impacted the liver and lung metabolites, revealing the strong influence of the HFHS diet on normal metabolism maturation during youth.