IL-12/IL-23 p40 Antibody [Unconjugated]

Western blot shows lysates of Hs 294T human melanoma cell line. PVDF Membrane was probed with 1 µg/mL of Goat Anti-Human IL-12/IL-23 p40 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF309) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF019). A specific band was detected for IL-12/IL-23 p40 at approximately 40 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 8.

Recombinant Human IL‑23 (Catalog # 1290-IL) induces IL-17 secretion in the mouse splenocytes in a dose‑dependent manner (orange line), as measured by Mouse IL-17 Quantikine kit. IL-17 Secretion elicited by Recombinant Human IL‑23 (0.75 ng/mL) is neutralized (green line) by increasing concentrations of Goat Anti‑Human IL‑12/IL‑23 p40 Anti­gen Affinity-purified Polyclonal Antibody (Catalog # AF309). The ND50 is typically 0.004-0.02 μg/mL.

• Reactivity: Hu
• Applications: WB, B/N
• Clonality: Polyclonal
• Host: Goat
• Conjugate: Unconjugated
• Concentration: LYOPH

IL-12/IL-23 p40 Antibody [Unconjugated] Summary

• Immunogen: S. frugiperda insect ovarian cell line Sf 21-derived recombinant human IL-12/IL-23 p40
  p40: Ile23-Ser328, Accession # P29460; p19: Ala21-Pro189, Accession # AAG37232
• Specificity: Detects human IL-12/IL-23 p40 in direct ELISAs and Western blots.
• Source: N/A
• Isotype: IgG
• Clonality: Polyclonal
• Host: Goat
• Gene: IL12B
• Purity Statement: Antigen Affinity-purified
• Endotoxin Note: <0.10 EU per 1 μg of the antibody by the LAL method.

Applications/Dilutions

• Dilutions:
  • Neutralization 0.004-0.02 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.
• Preservative: No Preservative
• Concentration: LYOPH
• Reconstitution Instructions: Reconstitute at 0.2 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-12/IL-23 p40 Antibody [Unconjugated]

• CLMF p40
• CLMF
• CLMF2
• Cytotoxic lymphocyte maturation factor 40 kDa subunit
• IL12 p40
• IL-12 p40
• IL-12 subunit p40
• IL12B
• IL-12B
• IL-12BNK cell stimulatory factor chain 2
• interleukin 12, p40
• interleukin 12B (natural killer cell stimulatory factor 2, cytotoxic lymphocytematuration factor 2, p40)
• interleukin-12 beta chain
• interleukin-12 subunit beta
• natural killer cell stimulatory factor, 40 kD subunit
• NKSF
• NKSF2
• NKSF2IL12, subunit p40

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.

Publications for IL-12/IL-23 p40 Antibody (AF309)(2)

Publications using AF309

• Zheng X, Fernando V, Sharma V et al. Correction of Arginine Metabolism with Sepiapterin-the Precursor of Nitric Oxide Synthase Cofactor BH4-Induces Immunostimulatory-shift of Breast Cancer Biochem. Pharmacol. 2/26/2020 [PMID: 32112882]
• Clustering of disulfide-rich peptides provides scaffolds for hit discovery by phage display: application to interleukin-23 BMC Bioinformatics, 2016-11-23;17(1):481. 2016-11-23 [PMID: 27881076] (ELISA Development (Detection), Human)

Bioinformatics

• Gene Symbol: IL12B