Feline IL-4 Antibody

  
  • Species Reactivity
    Feline
  • Specificity
    Detects feline IL-4 in ELISAs and Western blots. In Western blots, no cross-reactivity with human, mouse, or canine IL-4 is observed.
  • Source
    Monoclonal Mouse IgG2A Clone # 159638
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    E. coli-derived recombinant feline IL‑4
    Gln25-His133
    Accession # P55030
  • 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 Feline IL‑4 (Catalog # 984-FL)
    • Feline IL-4 Sandwich Immunoassay
      Reagent
  • ELISA Capture (Matched Antibody Pair)
    2-8 µg/mL 
    Feline IL‑4 Antibody (Catalog # MAB984)
  • ELISA Detection (Matched Antibody Pair)
    0.1-0.4 µg/mL 
    Feline IL‑4 Biotinylated Antibody (Catalog # BAF984)
  • ELISA Standard
     
    Recombinant Feline IL-4 Protein (Catalog # 984-FL)
  • Neutralization
    Measured by its ability to neutralize IL‑4-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 100 ng/mL Recombinant Feline IL‑4.
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‑4 and Neutralization by Feline IL‑4 Antibody. Recom­binant Feline IL‑4 (Catalog # 984-FL) stimulates proliferation in the TF‑1 human erythro­leukemic cell line in a dose-dependent manner (orange line). Proliferation elicited by Recom­binant Feline IL‑4 (100 ng/mL) is neutralized (green line) by increasing concentrations of Mouse Anti-Feline IL‑4 Mono­clonal Antibody (Catalog # MAB984). 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-4

Interleukin-4 (IL-4), also known as B cell-stimulatory factor-1, is a monomeric, approximately 13‑18 kDa Th2 cytokine that shows pleiotropic effects during immune responses (1‑3). It is a glycosylated polypeptide that contains three intrachain disulfide bridges and adopts a bundled four alpha -helix structure (4). Feline IL-4 is synthesized with a 24 amino acid (aa) signal sequence. Mature feline IL-4 shares 81%, 64%, 49%, 40%, and 40% aa sequence identity with canine, bovine, human, mouse, and rat IL-4, respectively. Human IL-4 is active on feline dendritic cells (5). IL-4 exerts its effects through two receptor complexes (6, 7). The type I receptor, which is expressed on hematopoietic cells, is a heterodimer of the ligand binding IL-4 R alpha and the common gamma chain (a shared subunit of the receptors for IL-2, -7, -9,-15, and -21). The type II receptor on nonhematopoietic cells consists of IL-4 R alpha and IL-13 R alpha 1. The type II receptor also transduces IL-13 mediated signals. IL-4 is primarily expressed by Th2-biased CD4+ T cells, mast cells, basophils, and eosinophils (1, 2). It promotes cell proliferation, survival, and immunoglobulin class switch to IgE in B cells, acquisition of the Th2 phenotype by naïve CD4+ T cells, priming and chemotaxis of mast cells, eosinophils, and basophils, and the proliferation and activation of epithelial cells (8‑11). IL-4 plays a dominant role in the development of allergic inflammation and asthma (10, 12).

  • References:
    1. Benczik, M. and S.L. Gaffen (2004) Immunol. Invest. 33:109.
    2. Chomarat, P. and J. Banchereau (1998) Int. Rev. Immunol. 17:1.
    3. SwissProt # P55030.
    4. Redfield, C. et al. (1991) Biochemistry 30:11029.
    5. Sprague, W.S. et al. (2005) J. Comp. Pathol. 133:136.
    6. Mueller, T.D. et al. (2002) Biochim. Biophys. Acta 1592:237.
    7. Nelms, K. et al. (1999) Annu. Rev. Immunol. 17:701.
    8. Paludan, S.R. (1998) Scand. J. Immunol. 48:459.
    9. Corthay, A. (2006) Scand. J. Immunol. 64:93.
    10. Ryan, J.J. et al. (2007) Crit. Rev. Immunol. 27:15.
    11. Grone, A. (2002) Vet. Immunol. Immunopathol. 88:1.
    12. Rosenberg, H.F. et al. (2007) J. Allergy Clin. Immunol. 119:1303.
  • Long Name:
    Interleukin 4
  • Entrez Gene IDs:
    3565 (Human); 16189 (Mouse); 287287 (Rat); 397225 (Porcine); 280824 (Bovine); 403785 (Canine); 574281 (Primate); 100302454 (Rabbit)
  • Alternate Names:
    B cell growth factor 1; BCDF; B-cell stimulatory factor 1; BCGF1; BCGF-1; binetrakin; BSF1; BSF-1; IL4; IL-4; IL-4B_cell stimulatory factor 1; interleukin 4; interleukin-4; Lymphocyte stimulatory factor 1; MGC79402; pitrakinra
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