Proteomics analysis of coronary blood microparticles in patients with acute myocardial infarction.

Background: Acute myocardial infarction (AMI) is the leading cause of death for patients with cardiovascular disease (CVD). Although researchers have made substantial efforts to elucidate its pathogenesis, the molecular mechanisms underlying AMI remain unknown. The aim of this study was to use proteomics to identify differentially expressed proteins (DEPs) and the possible biological functions and metabolic pathways related to coronary blood microparticles (MPs) in patients with AMI and stable coronary artery disease (SCAD); this study will allow for the identification of individuals at risk of acute thrombosis.

Methods: The study was performed on 5 AMI patients and 5 SCAD patients. DEPs were identified, and Gene Ontology (GO) enrichment and KEGG pathway enrichment analyzes were performed to determine the relative abundance and biological function of the significant DEPs that were identified in the present study.

Results: The current analysis identified 198 DEPs in the coronary blood of AMI patients and SCAD patients, including 85 proteins that were significantly upregulated and 113 proteins that were significantly downregulated. GO enrichment analysis demonstrated that GDP binding and GTP binding were enriched in molecular function. Similarly, KEGG pathway enrichment analysis revealed that the identified proteins were involved in pantothenate and coenzyme A biosynthesis, starch and sucrose metabolism, and the AMPK signalling pathway.

Conclusions: The proteome of coronary MPs differs between patients with AMI and patients with SCAD. In summary, the GO terms and KEGG pathways enriched by the DEPs may reflect the possible molecular mechanisms underlying the pathogenesis of acute thrombosis in patients with AMI.