Briefly, the induction of IL-17 in response to various antigens plays a pivotal role in initiation and/or development of several allergic inflammatory responses and autoimmune diseases such as multiple sclerosis (11), autoimmune encephalomyelitis (12), rheumatoid arthritis (13), systemic lupus erythematous (14), Behcet’s disease (15), and psoriasis (16). The gene discussed is IL17A; the disease is autoimmune disease.