Rat IL-13 Antibody

  
  • Species Reactivity
    Rat
  • Specificity
    Detects rat IL-13 in direct ELISAs and Western blots. In direct ELISAs and Western blots, no cross‑reactivity with recombinant mouse (rm) IL‑4, recombinant human IL-13, rmIL-13, or recombinant rhesus macaque IL‑13 is observed.
  • Source
    Monoclonal Mouse IgG2B Clone # 296202
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    E. coli-derived recombinant rat IL-13
    Thr19-His131
    Accession # P42203
  • 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.
  • Endotoxin Level
    <0.10 EU per 1 μg of the antibody by the LAL method.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    1 µg/mL
    Recombinant Rat IL‑13 (Catalog # 1945-RL)
    under non-reducing conditions only
  • Neutralization
    Measured by its ability to neutralize IL‑13-induced proliferation in the TF‑1 human erythroleukemic cell line. Kitamura, T. et al. (1989) J. Cell Physiol. 140:323. The Neutralization Dose (ND50) is typically 1-4 µg/mL in the presence of 15 ng/mL Recombinant Rat IL‑13.
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
Cell Proliferation Induced by IL‑13 and Neutralization by Rat IL‑13 Antibody. Recombinant Rat IL‑13 (Catalog # 1945-RL) stimulates proliferation in the TF‑1 human erythroleukemic cell line in a dose-dependent manner (orange line). Proliferation elicited by Recombinant Rat IL‑13 (15 ng/mL) is neutralized (green line) by increasing concentrations of Mouse Anti-Rat IL‑13 Monoclonal Antibody (Catalog # MAB1945). The ND50 is typically 1-4 µg/mL.
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.5 mg/mL in sterile PBS.
  • 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

IL-13 is a 17 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 rat IL-13 shares 59%, 75%, and 60% amino acid sequence identity with human, mouse, and rhesus 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, up‑regulates the expression of MHC class II, CD71, CD72, and CD23, and costimulates proliferation. IL-13 up‑regulates IL-6 while down‑regulating 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 over-expressed 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. Lakkis, F.G and E.N. Cruet (1993) Biochem. Biophys. Res. Commun. 197:612.
    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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