MCP-1, which is associated with a myriad of diseases including allergic asthma, multiple sclerosis, rheumatoid arthritis, atherosclerosis, and insulin-resistant diabetes, is produced by many cell types such as endothelial and epithelial cells, fibroblasts, smooth muscle, mesangial, and microglial cells, however, predominantly by monocytes/macrophages [9]. The gene discussed is CCL2; the disease is allergic asthma.