IL-12, with STAT4 and T-bet, promotes differentiation into TH1 cells that produce IFNγ. The Interleukin-12 (IL-12) family of cytokines, which includes IL-12, IL-23, IL-27, and IL-35, are important mediators of inflammatory disease. Each member is a heterodimeric complex composed of two subunits whose expression is regulated independently. The founding member, IL-12 (also known as IL-12p70), consists of the heterodimer of p35 and p40. Moreover, studies have demonstrated that homodimers and monomers of the p40 subunit also exist (known as IL-12p40) and may act as antagonists of IL-12 function. IL-23 is composed of the heterodimer p40 and p19, which is homologous to p35. IL-27 is a heterodimeric cytokine consisting of Epstein-Barr virus-induced gene 3 (EBI3) and p28, which are related to p40 and p35, respectively. The most recently identified member of this family, IL-35, is composed of p35 and EBI3. As inducers of IFNγ production, IL-12, IL-23, and IL-27 play critical roles in regulating the inflammatory response. Moreover, each is involved in mediating T cell-dependent immunity. For example, IL-12 and IL-27 are involved in T helper 1 (TH1) differentiation, while IL-23 is critical for TH17 survival and expansion.
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FC = Flow Cytometry, Intracellular Staining/Flow Cytometry; ELISA = ELISA, ELISPOT, Multiplexing Immunoassays; ICC = Immunocytochemistry; IHC = Immunohistochemistry, Immunofluorescence, Microscopy, Imaging, In Vivo Imaging; FA = Functional Assays, Bioassays, Neutralization, Depletion Studies, Biomolecule Conjugation; WB = Immunoprecipitation, Western Blotting
RUO = Research Use Only; GPR = General Purpose Reagent; ASR = Analyte Specific Reagent. Analytical and performance characteristics are not established; CE = CE-marked reagents