PECAM1 and angina pectoris: Furthermore, SGR has been proved to be effective for patients with angina pectoris after PCI, and it can also upregulate the expression of platelet/endothelial cell adhesion molecule-1 (PECAM-1)/CD31 and vascular endothelial growth factor (VEGF), thereby promoting myocardium angiogenesis in myocardial infarction induced in rats [26].