Human IL-4 Phycoerythrin MAb (Clone 3007) 100 TESTS

• Species Reactivity

  Human

• Specificity

  Detects human IL-4 in direct ELISAs and Western blots. In Western blots, this antibody does not cross-react with recombinant mouse IL‑4.

• Source

  Monoclonal Mouse IgG    ₁ Clone # 3007

• Purification

  Protein A or G purified from ascites

• Immunogen

  E. coli-derived recombinant human IL‑4    
  His25-Ser153    
  Accession # P05112.1

• Formulation

  Supplied in a saline solution containing BSA and Sodium Azide.

• Label

  Phycoerythrin

Applications

• 
  

  Recommended    
  Concentration

  Sample

• Intracellular Staining by Flow Cytometry

  10 µL/10    ⁶ cells

  See below

• 
  

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

• Shipping

  The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

• Stability & Storage

  Protect from light.    Do not freeze.    

• 12 months from date of receipt, 2 to 8 °C as supplied.

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). Human IL-4 is synthesized with a 24 aa signal sequence. Alternate splicing generates an isoform with a 16 aa internal deletion. Mature human IL-4 shares 55%, 39%, and 43% aa sequence identity with bovine, mouse, and rat IL-4, respectively. Human, mouse, and rat IL-4 are species-specific in their activities (5-7). IL-4 exerts its effects through two receptor complexes (8, 9). 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 non-hematopoietic 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 IgG4 and IgE in human 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 (10-13). IL-4 plays a dominant role in the development of allergic inflammation and asthma (12, 14).

• 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. Yokota, T. et al. (1986) Proc. Natl. Acad. Sci. USA 83:5894.

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

5. Ramirez, F. et al. (1988) J. Immunol. Meth. 221:141.

6. Leitenberg, D. and T.L. Feldbush (1988) Cell. Immunol. 111:451.

7. Mosman, T.R. et al. (1987) J. Immunol. 138:1813.

8. Mueller, T.D. et al. (2002) Biochim. Biophys. Acta 1592:237.

9. Nelms, K. et al. (1999) Annu. Rev. Immunol. 17:701.

10. Paludan, S.R. (1998) Scand. J. Immunol. 48:459.

11. Corthay, A. (2006) Scand. J. Immunol. 64:93.

12. Ryan, J.J. et al. (2007) Crit. Rev. Immunol. 27:15.

13. Grone, A. (2002) Vet. Immunol. Immunopathol. 88:1.

14. 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