A Comprehensive Metabolomic and Microbial Analysis Following Dietary Amino Acid Reduction in Mice

Area of Science:

• Nutritional metabolomics
• Systems biology
• Microbiome research

Background:

• Nutritional metabolomics offers insights into diet-induced biochemical processes.
• Phenotypic analysis of dietary interventions' impact on metabolic states across physiologic sites is limited.
• Dietary amino acids are crucial nutrients influencing physiology and pathophysiology.

Purpose of the Study:

• To investigate the effects of dietary amino acid modulation on the metabolome and microbiome in mice.
• To conduct comprehensive metabolite profiling across serum, liver, and feces.
• To analyze gut microbial changes in response to dietary protein or non-essential amino acid reduction.

Main Methods:

• Metabolite profiling of serum, liver, and feces in mice.
• Gut microbial analysis.
• Dietary interventions involving reduction of total protein or non-essential amino acids.

Main Results:

• Distinct and overlapping metabolic profile changes were observed across serum, liver, and feces, with liver and serum showing the strongest signals.
• Amino acids and related molecules were the most altered metabolites, alongside changes in glycolysis and tricarboxylic acid cycle molecules.
• Significant differences in fecal microbial species abundance were detected between experimental groups.

Conclusions:

• Dietary amino acid modifications profoundly influence metabolic profiles across different organ systems.
• Metabolomic profiling is a valuable tool for assessing diet-induced metabolic alterations.
• The study highlights the interconnectedness of diet, metabolism, and the gut microbiome.