• Species Reactivity

  Porcine

• Specificity

  Detects porcine IL-4 in Western blots. In Western blots, 100% cross-reactivity with recombinant mouse IL-4 is observed, 15% with recombinant rat IL-4 is observed, and no cross-reactivity with recombinant bovine IL-4, recombinant canine IL-4, recombinant cotton rat IL-4, recombinant equine IL-4, recombinant feline IL-4, recombinant human IL-4, or recombinant human IL-13 is observed.

• Source

  Monoclonal Mouse IgG    ₁ Clone # 286120

• Purification

  Protein A or G purified from hybridoma culture supernatant

• Immunogen

  E. coli-derived recombinant porcine IL-4    
  His25-Cys133    
  Accession # Q04745

• 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

• 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 (ND    ₅₀) is typically 0.3-1.2 µg/mL in the presence of 30 ng/mL Recombinant Porcine IL‑4.

Please Note: Optimal dilutions should be determined by each laboratory for each application.  are available in the Technical Information section on our website.

Data Examples

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). Porcine IL-4 is synthesized with a 24 amino acid (aa) signal sequence. Mature porcine IL-4 shares 78%, 59%, 41%, and 41% aa sequence identity with bovine, human, mouse, and rat IL-4, respectively. Human IL-4 is active on porcine vascular endothelial 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. Bailey, M. et al. (1993) Biochim. Biophys. Acta 1171:328.

4. Redfield, C. et al. (1991) Biochemistry 30:11029.

5. Stocker, C.J. et al. (2000) J. Immunol. 164:3309.

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