in the group, the participants exhibited negative results or <50% obstruction upon coronary artery CT or coronary angiography. The group did not have coronary heart disease and diabetes

in the group, the participants exhibited negative results or <50% obstruction upon coronary artery CT or coronary angiography. The group did not have coronary heart disease but have type 2 diabetes mellitus.

In the group, we eventually recruited 30 adult patients who were firstly diagnosed ST-elevation myocardial infarction (STEMI) within 12 hours of appearance chest pains or other AMI symptoms and had no previous history of coronary artery disease (CAD). Peripheral venous blood samples were drawn from subjects on admission or prior to coronary revascularization.

To obtain a complete metabolic profile, untargeted metabolomics analysis was conducted by using UPLC-MS. Chromatographic separation was accomplished in an Thermo Vanquish system equipped with an ACQUITY UPLC®HSS T3 (150×2.1 mm, 1.8 µm, Waters, USA) column maintained at 40 ℃. The temperature of the autosampler was 8 ℃. The ESI-MSn experiments were executed on the Thermo Q Exactive mass spectrometer with the spray voltage of 3.5 kV and -2.5 kV in positive and negative modes, respectively. The capillary temperature was 325℃. The analyzer scanned over a mass range of m/z 81-1 000 for full scan at a mass resolution of 70 000. The normalized collision energy was 30 eV(19606840). The detected ions were all under isotopic calibration with the accurate masses of the reference standards.

About 10ml of venous blood was collected on the admission, serum was separated. To obtain a complete metabolic profile, untargeted metabolomics analysis was conducted by using UPLC-MS.