Plasma exosome proteomics in different glucose statuses: a cross-sectional study on type 2 diabetes pathogenesis

Area of Science:

• Endocrinology and Metabolism
• Proteomics and Biomarker Discovery
• Cell Biology

Background:

• Type 2 diabetes (T2DM) pathogenesis requires further elucidation.
• Exosomes are promising biomarkers for advancing diabetes research.
• Understanding exosome cargo may reveal novel insights into T2DM.

Purpose of the Study:

• To investigate circulating plasma exosome proteomic profiles in individuals with varying glucose statuses.
• To explore potential new perspectives on T2DM pathogenesis.
• To identify exosomal biomarkers associated with glucose dysregulation.

Main Methods:

• Recruited participants based on American Diabetes Association criteria for euglycemia, prediabetes, and T2DM.
• Utilized data-independent acquisition mass spectrometry for quantitative proteomics of plasma exosomes.
• Performed protein-protein interaction (PPI) and gene ontology (GO) analyses on differentially expressed proteins.

Main Results:

• Exosome proteomic patterns differed between euglycemic and dysglycemic (prediabetes, T2DM) groups.
• Identified 32 differential proteins, with 7 significant in network analysis.
• GO and pathway analyses highlighted roles for immunity, complement, and coagulation cascades in T2DM.

Conclusions:

• Circulating exosome cargo reflects immune and coagulatory activation even in prediabetes.
• Exosomal proteomic patterns distinguish normal physiology from early T2DM-related changes.
• Exosomes serve as valuable indicators of early pathogenic processes in T2DM.