Human/Canine IL-13 Antibody

  
  • Species Reactivity
    Human, Canine
  • Specificity
    Detects recombinant canine IL-13 in direct ELISAs and detects recombinant canine IL-13 and human IL-13 in Western blots. In direct ELISAs, approximately 7% cross-reactivity with recombinant human IL-13 and recombinant mouse IL-13 is observed and less than 2% cross-reactivity with recombinant rat IL-13 and recombinant rhesus monkey IL-13 is observed.
  • Source
    Polyclonal Sheep IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    E. coli-derived recombinant canine IL-13
    Ser19-Arg131
    Accession # Q9N0W9
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    1 µg/mL
    See below
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.
Data Examples
Detection of Human/Canine IL‑13 by Western Blot. Western blots show lysate of MOLT‑4 human acute lymphoblastic leukemia cell line and Recombinant Canine IL-13 (Catalog # 5894-CL). PVDF Membranes were probed with 1 μg/ml (for lysate of MOLT-4) or 0.1 μg/ml (for Recombinant Canine 1l-13) of Sheep Anti-canine IL-13 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5894) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for IL-13 at approximately 13- 15 kDa (as indiocated). These experiments were conducted under reducing conditions and using Immunoblot Buffer Group 1.
Preparation and Storage
  • Reconstitution
    Sterile PBS to a final concentration of 0.2 mg/mL.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & 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.
Background: IL-13

Interleukin-13 (IL-13) is a 13 kDa immunoregulatory cytokine that plays a key role in the pathogenesis of allergic asthma and atopy. It is secreted by Th1 and Th2 CD4+ T cells, NK cells, visceral smooth muscle cells, eosinophils, mast cells, and basophils (1‑3). IL-13 circulates as a monomer with two internal disulfide bonds that contribute to a bundled four  alpha -helix configuration (4, 5). Mature canine IL-13 shares 69%, 56%, and 55% amino acid sequence identity with human, mouse, and rat IL‑13, respectively. Despite the low homology, it exhibits cross-species activity between human, mouse, and rat (6, 7). IL-13 has diverse activities on numerous cell types (8). On macrophages, IL-13 suppresses the production of proinflammatory cytokines and other cytotoxic substances. On B cells, IL-13 induces immunoglobulin class switching to IgE, upregulates the expression of MHC class II, CD71, CD72, and CD23, and costimulates proliferation. IL-13 upregulates IL-6 while downregulating IL-1 and TNF-alpha production by fibroblasts and endothelial cells. IL-13 binds with low affinity to IL-13 R alpha 1, triggering IL-13 R alpha 1 association with IL-4 R alpha. This high affinity receptor complex also functions as the type 2 IL-4 receptor complex (9, 10). Additionally, IL-13 binds with high affinity to IL-13 R alpha 2 which is expressed intracellularly, on the cell surface, and as a soluble molecule (11 - 14). IL-13 R alpha 2 regulates the bioavailability of both IL-13 and IL-4 and is overexpressed in glioma and several bronchial pathologies (10, 15, 16). Compared to wild type IL-13, the atopy-associated R110Q variant of IL-13 elicits increased responsiveness from eosinophils that express low levels of IL-13 R alpha 2 (17).

  • References:
    1. Wills-Karp, M. (2004) Immunol. Rev. 202:175.
    2. Nakajima H. and K. Takatsu (2007) Int. Arch. Allergy Immunol. 142:265.
    3. Yang, S. et al. (2000) J. Interferon Cytokine Res. 20:779.
    4. Moy, F.J. et al. (2001) J. Mol. Biol. 310:219.
    5. Eisenmesser, E.Z. et al. (2001) J. Mol. Biol. 310:231.
    6. Ruetten, H. and C. Thiemermann (1997) Shock 8:409.
    7. Lakkis, F.G. et al. (1997) Biochem. Biophys. Res. Commun. 235:529.
    8. Wynn, T.A. (2003) Annu. Rev. Immunol. 21:425.
    9. Andrews, A.L. et al. (2002) J. Biol. Chem. 277:46073.
    10. Tabata, Y. et al. (2007) Curr. Allergy Asthma Rep. 7:338.
    11. Chiaramonte, M.G. et al. (2003) J. Exp. Med. 197:687.
    12. Daines, M.O. and G.K. Hershey (2002) J. Biol. Chem. 227:10387.
    13. Matsumura, M. et al. (2007) Biochem. Biophys. Res. Commun. 360:464.
    14. Tabata, Y. et al. (2007) J. Immunol. 177:7905.
    15. Andrews, A.L. et al. (2006) J. Allergy Clin. Immunol. 118:858.
    16. Joshi, B.H. et al. (2006) Vitam. Horm. 74:479.
    17. Andrews, A. L. et al. (2007) J. Allergy Clin. Immunol. 120:91.
  • Long Name:
    Interleukin 13
  • Entrez Gene IDs:
    3596 (Human); 16163 (Mouse); 116553 (Rat); 574325 (Primate)
  • Alternate Names:
    ALRHMGC116789; BHR1interleukin-13; IL13; IL-13; IL-13MGC116788; interleukin 13; MGC116786; NC30; P600
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