Purpose: Amino acids are the important metabolites in the body and play a crucial role in biological processes. The purpose of this study is to provide a profile of amino acids change in the serum of T2DM patients and identify potential biomarkers.
Patients and Methods: In this study, we quantitatively determined the serum amino acid profiles of 30 T2DM patients and 30 healthy volunteers. T test and multivariate statistical analysis were used to identify candidate biomarkers with GraphPad Prism 9.5 software and MetaboAnalyst 5.0 on-line platform.
Results: Thirty-four amino acids were quantified, and 19 amino acid levels differed significantly between T2DM and Healthy groups. Screened by the specific screening criteria (VIP> 1.0; P< 0.05; FC> 1.5, or FC< 0.67) in MetaboAnalyst 5.0 platform, 8 amino acids were identified as potential biomarkers. Pearson rank correlation test showed 14 differential amino acids were significantly correlated with T2DM-related physiological parameters.
Conclusion: The results of this study provide theoretical basis for the subsequent development of dietary supplements for the prevention or treatment of T2DM and its complications.

Keywords: diabetes mellitus type 2, T2DM, targeted metabolomics, amino acids, biomarker