Elevated levels of IL-1β, IL-1RA, IL-5, IL-8, IL-12p70, IL-13, and IL-17 cytokines have been found in plasma of high-functioning autistic male children, and chemokine and cytokine profile alterations have been described, which are associated with the comorbidities of attention deficit hyperactivity disorder in autism [75,152,153,154]. This evidence concerns the gene IL17A and autism.