Cytokine that is chemotactic for neutrophils. Produced by T-cell after stimulation by antigen or induction by concanavalin a (Con-A). The polymorphisms in strains DBA/2J and SJL/J may be associated with severity of clinical symptoms of experimental allergic encephalomyelitis, an animal model of multiple sclerosis, and susceptibility to the monophasic remitting/nonrelapsing form of the disease. Belongs to the intercrine beta (chemokine CC) family.