Cotton Rat IL-4 Antibody

Catalog #: AF584 Datasheet

Catalog #	Availability	Size / Price	Qty
AF584
AF584-SP

Cell Proliferation Induced by IL‑4 and Neutralization by Cotton Rat IL‑4 Antibody.

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Cotton Rat IL-4 Antibody Summary

Species Reactivity

Cotton Rat

Specificity

Detects cotton rat IL‑4 in direct ELISAs and Western blots. In direct ELISAs, approximately 10% cross-reactivity with recombinant rat IL-4 is observed, 5% cross-reactivity with recombinant mouse IL-4 is observed, and less than 1% cross-reactivity with recombinant human IL-4 and recombinant porcine IL-4 is observed.

Source

Polyclonal Goat IgG

Purification

Antigen Affinity-purified

Immunogen

E. coli-derived recombinant cotton rat IL‑4
Cys21-Phe147
Accession # AAL18820

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Endotoxin Level

<0.10 EU per 1 μg of the antibody by the LAL method.

Applications

Recommended Concentration

Sample

Western Blot

0.1 µg/mL

Recombinant Cotton Rat IL‑4 (Catalog # 584-R4)

Neutralization

Measured by its ability to neutralize IL‑4-induced proliferation in the rat splenocytes. The Neutralization Dose (ND₅₀) is typically 0.075-0.3 µg/mL in the presence of 10 ng/mL Recombinant Cotton Rat IL‑4 and 10 µg/mL PHA.

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.

Scientific Data

Neutralization

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Cell Proliferation Induced by IL‑4 and Neutralization by Cotton Rat IL‑4 Antibody. Recombinant Cotton Rat IL-4 (Catalog # 584-R4) stimulates proliferation in the rat splenocytes in a dose-dependent manner (orange line). Proliferation elicited by Recombinant Cotton Rat IL-4 (10 ng/mL) is neutral-ized (green line) by increasing concentrations of Goat Anti-Cotton Rat IL-4 Antigen Affinity-purified Poly-clonal Antibody (Catalog # AF584). The ND₅₀ is typically 0.075-0.3 µg/mL in the presence of PHA (10 µg/mL).

Preparation and Storage

Reconstitution

Reconstitute at 0.2 mg/mL in sterile PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

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 kDa‑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). Cotton rat IL-4 is synthesized with a 24 amino acid (aa) signal sequence. Mature cotton rat IL-4 shares 41%, 44%, 57%, and 68% aa sequence identity with bovine, human, mouse, and rat IL-4, respectively. IL-4 exerts its effects through two receptor complexes (5, 6). 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 (7‑10). IL-4 plays a dominant role in the development of allergic inflammation and asthma (9, 11).

References

Benczik, M. and S.L. Gaffen (2004) Immunol. Invest. 33:109.
Chomarat, P. and J. Banchereau (1998) Int. Rev. Immunol. 17:1.
Accession # AAL18820.
Redfield, C. et al. (1991) Biochemistry 30:11029.
Mueller, T.D. et al. (2002) Biochim. Biophys. Acta 1592:237.
Nelms, K. et al. (1999) Annu. Rev. Immunol. 17:701.
Paludan, S.R. (1998) Scand. J. Immunol. 48:459.
Corthay, A. (2006) Scand. J. Immunol. 64:93.
Ryan, J.J. et al. (2007) Crit. Rev. Immunol. 27:15.
Grone, A. (2002) Vet. Immunol. Immunopathol. 88:1.
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; IL4E12; interleukin 4; interleukin-4; Lymphocyte stimulatory factor 1; MGC79402; pitrakinra