All cells that contribute to the development of atherosclerosis—macrophages differentiated from monocytes, recruited leukocytes, and smooth muscle cells that migrated from the media to the intima—produce and secrete various cytokines, such as tumor necrosis factor (TNF)-α, interleukin (IL)-1β, and IL-6 to promote plaque growth [16]. This evidence concerns the gene IL6 and atherosclerosis.