Untargeted metabolomics combined with lipidomics revealed the effects of myocardial infarction and exercise rehabilitation on blood circulation metabolism of patients based on liquid chromatography-mass spectrometry

Myocardial infarction (MI) is a major cause of death worldwide. Exercise rehabilitation (ER) is a powerful tool to improve life quality and prognosis of MI patients. Herein, we developed an untargeted metabolomics combined with lipidomics method to qualitatively and quantitatively detect metabolites in plasma. A total of 475 metabolites were annotated according to MS, MS/MS, and quantified by internal standard method. Moreover, medical statistical methods combined with chemometrics were used for metabolomics data mining and interpretation of clinical issues (matched Cohort 1, n=90, Cohort 2, n=6). The results illustrated that abnormal lipid metabolism is the most significant metabolic disorder for MI patients. And, three metabolic pathways, bile secretion, HIF-1 signaling pathway, and glutathione metabolism were uncovered in MI patients. Furthermore, glutamine, Phenylacetylglutamine (PAGln) and lysophosphatidylcholine (LPCs) were revealed as the essential biomarkers for ER of MI patients. Our findings revealed the metabolic landscape of MI and metabolic alterations after ER, will underlay potential applications of plasma metabolites in the detection of MI and optimization of ER program.