Abstract
Cytokines are endogenous polypeptide mediators of intercellular interaction. The term "cytokines" (from the Greek "kuttaro" - cell + "kinisi" - movement) denotes molecules involved in the regulation of movement or interaction between different cells. Cytokines are a kind of conductors of intercellular communications. The role of cytokines in the formation and regulation of protective reactions against pathogens and tissue restoration after injuries has been proven. At the same time, cytokines, being the main mediators of the immune system, participate in the pathogenesis of all autoimmune, inflammatory and allergic diseases without exception.