Its key role in atherosclerosis was demonstrated in mice model showing that atherosclerotic lesion size was significantly smaller in animals deficient in TNF, which was associated with decreased expression of intracellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), and monocyte chemotactic protein-1 (MCP-1) [17]. This evidence concerns the gene VCAM1 and atherosclerosis.