Interleukin-12 (IL-12) is, when biologically active, a heterodimer (p70) consisting of two covalently linked subunits, p35 and p40. IL-12 is produced by antigen-presenting cells, specifically dendritic cells and macrophages. IL-12 is a proinflammatory cytokine that promotes Th1-type responses by inducing IFN-γ production and enhancing proliferation and cytotoxicity of NK and T cells.
Interleukin-23 (IL-23) is a disulfide-linked heterodimer which consists of a unique p19 subunit and the p40 subunit of IL-12. IL-23 is a proinflammatory cytokine, which is produced by macrophages and dendritic cells upon infections with certain pathogens. The IL-23 receptor is expressed on Th17 cells and IL-23 is responsible for Th17 expansion and stabilization.
Since both IL-12 and IL-23 heterodimers comprise the p40 subunit, capture immunoassays based on antibodies to p40 will detect both cytokines. Such assays can also detect p40 monomers and dimers.
ELISA kit for quantitative determination of native and recombinant mouse IL-12 and IL-23 in biological fluids such as serum, plasma and cell culture supernatants. The kit contains capture mAb, biotinylated detection mAb, streptavidin-enzyme conjugate HRP and a recombinant IL-12 standard (p70 heterodimer).
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