IL-23A/IL-23 P19 Antibody (1193B) [Unconjugated]

Western blot shows lysates of CHO Chinese hamster ovary cell line either mock transfected or transfected with human IL-23 p19. PVDF membrane was probed with 1 µg/mL of Rabbit Anti-Human IL-23 p19 Monoclonal Antibody (Catalog # MAB12901) followed by HRP-conjugated Anti-Rabbit IgG Secondary Antibody (Catalog # HAF008). A specific band was detected for IL-23 p19 at approximately 19 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Recombinant Human IL‑23 (Catalog # 1290-IL) stimulates IL‑17 secretion in mouse splenocytes in a dose-dependent manner (orange line), as measured by the Mouse IL‑17 Quantikine ELISA Kit (Catalog # M1700). Under these conditions, IL‑17 secretion elicited by Recombinant Human IL‑23 (0.3 ng/mL) is neutralized (green line) by increasing concentrations of Rabbit Anti-Human IL‑23 p19 Monoclonal Antibody (Catalog # MAB1290). The ND50 is typically 0.15-0.9 µg/mL.

• Reactivity: Hu
• Applications: WB, B/N
• Clone: 1193B
• Clonality: Monoclonal
• Host: Rabbit
• Conjugate: Unconjugated

IL-23A/IL-23 P19 Antibody (1193B) [Unconjugated] Summary

• Additional Information: Recombinant Monoclonal Antibody.
• Immunogen: E. coli-derived recombinant human IL-23 p19
  Arg20-Pro189
  Accession # Q9NPF7
• Specificity: Detects human IL-23 p19 in direct ELISAs and Western blots.
• Source: N/A
• Isotype: IgG2b
• Clonality: Monoclonal
• Host: Rabbit
• Purity Statement: Protein A or G purified from cell culture supernatant

Applications/Dilutions

• Dilutions:
  • Neutralization 0.15-0.9 ug/mL
  • Western Blot 1 ug/mL

Packaging, Storage & Formulations

• Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
• Buffer: Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
• Reconstitution Instructions: Reconstitute at 0.5 mg/mL in sterile PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for IL-23A/IL-23 P19 Antibody (1193B) [Unconjugated]

• IL-23 p19/IL-12 p40
• IL23
• IL-23
• IL-23A
• IL-23-A
• IL-23p19
• IL-23p19/IL-12p40
• IL23P19P19
• interleukin 23 p19 subunit
• interleukin 23, alpha subunit p19
• interleukin-23 subunit alpha
• Interleukin-23 subunit p19
• JKA3 induced upon T-cell activation
• MGC79388
• SGRF
• SGRFIL-23 subunit alpha

Background

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 p19 cDNA encodes a 189 amino acid residue (aa) precursor protein with a putative 19 aa signal peptide and 170 aa mature protein. 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.

1. Oppmann, B. et al. (2000) Immunity 13:715.
2. Lankford, C.S. and D.M. Frucht (2003) J. Leukoc. Biol. 73:49.
3. Parham, C. et al. (2002) J. Immunol. 168:5699.
4. Belladonna, M.L. et al. (2002) J. Immunol. 168:5448.
5. Aggarwal, S. et al. (2003) J. Biol. Chem. 278:1910.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Bioinformatics

• Uniprot:
  • Q9NPF7()