VCAM1 and endothelial dysfunction: Stent implantation can cause vascular endothelial injury, and in the environment of hyperglycemia, monocyte chemoattractant protein-1 (MCP1) and vascular cell adhesion molecule-1 (VCAM1) expression increased, enhance the interaction between monocytes and endothelial cells, and further promote endothelial dysfunction [20].