VCAM-1 is a member of the immunoglobulin superfamily, the superfamily of proteins including antibodies and T-cell receptors. It mediates the adhesion of lymphocytes, monocytes, eosinophils, and basophils to vascular endothelium. It also functions in leukocyte-endothelial cell signal transduction, and it may play a role in the development of atherosclerosis and rheumatoid arthritis. Certain melanoma cells can use VCAM-1 to adhere to the endothelium, VCAM-1 may participate in monocyte recruitment to atherosclerotic sites, and it is highly overexpressed in the inflamed brain. As a result, VCAM-1 is a potential drug target.