Human IL-23 p19 PE-conjugated Antibody
Human IL-23 p19 PE-conjugated Antibody Summary
Arg20-Pro189
Accession # Q9NPF7
Applications
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Scientific Data
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Detection of IL‑23 in Human PBMCs by Flow Cytometry. Human peripheral blood mononuclear cells (PBMCs), (A) treated with LPS, or (B) resting, were stained with Mouse Anti-Human IL-23 p19 PE-conjugated Monoclonal Antibody (Catalog # IC17161P) and Mouse Anti-Human CD14 APC-conjugated Monoclonal Antibody (Catalog # FAB3832A). Quadrant markers were set based on control antibody staining (Catalog # IC0041P). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005). View our protocol for Staining Intracellular Molecules.
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Preparation and Storage
Background: IL-23
Interleukin 23 (IL-23) is a heterodimeric cytokine composed of two disulfide-linked subunits, a p19 subunit that is unique to IL-23, and a p40 subunit that is shared with IL-12 (1‑5). The p19 subunit has homology to the p35 subunit of IL-12, as well as to other single chain cytokines such as IL-6 and IL-11. The p40 subunit is homologous to the extracellular domains of the hematopoietic cytokine receptors. Human and mouse p19 share 70% aa sequence identity. Although p19 is expressed by activated macrophages, dendritic cells, T cells, and endothelial cells, only activated macrophages and dendritic cells express p40 concurrently to produce IL-23. The functional IL-23 receptor complex consists of two receptor subunits, the IL-12 receptor beta 1 subunit (IL-12 R beta 1) and the IL-23-specific receptor subunit (IL-23 R). IL-23 has biological activities that are similar to, but distinct from IL-12. Both IL-12 and IL-23 induce proliferation and IFN-gamma production by human T cells. While IL-12 acts on both naïve and memory human T cells, the effects of IL-23 is restricted to memory T cells. In mouse, IL-23 but not IL-12, has also been shown to induce memory T cells to secret IL-17, a potent proinflammatory cytokine. IL-12 and IL-23 can induce IL-12 production from mouse splenic DC of both the CD8- and CD8+ subtypes, however only IL-23 can act directly on CD8+ DC to mediate immunogenic presentation of poorly immunogenic tumor/self peptide.
- Oppmann, B. et al. (2000) Immunity 13:715.
- Lankford, C.S. and D.M. Frucht (2003) J. Leukoc. Biol. 73:49.
- Parham, C. et al. (2002) J. Immunol. 168:5699.
- Belladonna, M.L. et al. (2002) J. Immunol. 168:5448.
- Aggarwal, S. et al. (2003) J. Biol. Chem. 278:1910.
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