Monocyte chemotactic protein-1 (MCP-1) is a member of the C-C family of chemokines. Chemokines are mediators that share the capacity to induce directional migration of leukocytes. MCP-1 is a chemoattractant for many cell types such as monocytes, neutrophils, hepatic stellate cells, granulocytes and T lymphocytes. MCP-1 is believed to play a role in a variety of pathological conditions, including inflammatory and immune reactions, atherosclerosis and neoplasia. Monocyte Chemotactic Protein-1 (MCP-1) is also known as Monocyte Chemotactic Activating Factor (MCAF) or CCL2.