Interleukin-23 subunit alpha (IL23A)

Associates with IL12B to form the IL-23 interleukin, a heterodimeric cytokine which functions in innate and adaptive immunity. IL-23 may constitute with IL-17 an acute response to infection in peripheral tissues.

IL-23 binds to a heterodimeric receptor complex composed of IL12RB1 and IL23R, activates the Jak- Stat signaling cascade, stimulates memory as opposed to naive T- cells and boosts production of proinflammatory cytokines. IL-23 induces autoimmune inflammation and thus may cause autoimmune inflammatory diseases and may be important for tumorigenesis.