Rat IL-5 Antibody

  
  • Species Reactivity
    Rat
  • Specificity
    Detects rat IL-5 in direct ELISAs. In direct ELISAs, 50% cross-reactivity with mouse IL-5 is observed and no cross‑reactivity with human, equine, canine, feline, or rhesus monkey IL-5 is observed.
  • Source
    Monoclonal Mouse IgG2B Clone # 299257
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    S. frugiperda insect ovarian cell line Sf 21-derived recombinant rat IL-5
    Met20-Val132
    Accession # Q08125
  • 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‑5-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 0.02-0.08 µg/mL in the presence of 1.25 ng/mL Recombinant Rat IL‑5.
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‑5 and Neutralization by Rat IL‑5 Antibody.

Recombinant Rat IL‑5 (Catalog # 545-RL) stimulates proliferation in the TF‑1 human erythroleukemic cell line in a dose-dependent manner (orange line). Proliferation elicited by Recombinant Rat IL‑5 (1.25 ng/mL) is neutralized (green line) by increasing concentrations of Mouse Anti-Rat IL‑5 Monoclonal Antibody (Catalog # MAB5451). The ND50 is typically 0.02‑0.08 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-5
Interleukin-5 (IL-5) is a secreted glycoprotein that belongs to the alpha -helical group of cytokines (1 ‑ 3). Unlike other family members, it is present as a covalently linked antiparallel dimer (4, 5). The cDNA for rat IL-5 encodes a signal peptide and a 113 amino acid (aa) secreted mature protein. Mature rat IL-5 shares 70%, 94%, 56%, 63%, 59% and 59%, aa sequence identity with human, mouse, canine, equine, feline and porcine IL-5, respectively. IL-5 is primarily produced by CD4+ Th2 cells, but also by activated eosinophils, mast cells, EBV-transformed B cells, Reed-Sternberg cells in Hodgkin’s disease, and IL-2-stimulated invariant natural killer T cells (iNKT) (1 ‑ 3, 6 ‑ 8). IL-5 increases production and mobilization of eosinophils and CD34+ progenitors from the bone marrow and causes maturation of eosinophil precursors outside the bone marrow (1, 6, 9, 10). The receptor for human IL-5, mainly expressed by eosinophils, but also found on basophils and mast cells, consists of a unique ligand-binding subunit (IL-5 R alpha ) and a shared signal‑transducing subunit, beta c (3, 6, 11). IL-5 R alpha first binds IL-5 at low affinity, then associates with preformed beta c dimers, forming a high-affinity receptor (12). IL-5 also binds proteoglycans, potentially enhancing its activity (13). Soluble forms of IL-5 R alpha   antagonize IL-5 and can be found in vivo (10, 14). In humans, IL-5 primarily affects cells of the eosinophilic lineage, and promotes their differentiation, maturation, activation, migration and survival, while in mice IL-5 also enhances Ig class switching and release from B1 cells (1 ‑ 3, 9, 10, 15, 16). IL-5 also promotes differentiation of basophils and primes them for histamine and leukotriene release (17).
  • References:
    1. Rosenberg, H. F. et al. (2007) J. Allergy Clin. Immunol. 119:1303.
    2. Elsas, P.X. and M. I. G. Elsas (2007) Curr. Med. Chem. 14:1925.
    3. Martinez-Moczygemba, M. and D. P. Huston (2003) J. Allergy Clin. Immunol. 112:653.
    4. Minamitake, Y. et al. (1990) J. Biochem. 107:292.
    5. McKenzie, A. N. et al. (1991) Mol. Immunol. 28:155.
    6. Shakoory, B. et al. (2004) J. Interferon Cytokine Res. 24:271.
    7. Lalani, T. et al. (1999) Ann. Allergy Asthma Immunol. 82:317.
    8. Sakuishi, K. et al. (2007) J. Immunol. 179:3452.
    9. Clutterbuck, E. J. et al. (1989) Blood 73:1504.
    10. Cameron, L. et al. (2000) J. Immunol. 164:1538.
    11. Tavernier, J. et al. (1991) Cell 66:1175.
    12. Zaks-Zilberman, M. et al. (2008) J. Biol. Chem. 283:13398.
    13. Lipscombe, R. et al. (1998) J. Leukocyte Biol. 63:342.
    14. Tavernier, J. et al. (2000) Blood 95:1600.
    15. Kopf, M. et al. (1996) Immunity 4:15.
    16. Horikawa, K. and K. Takatsu (2006) Immunology 118:497.
    17. Denburg, J. A. et al. (1991) Blood 77:1462.
  • Long Name:
    Interleukin 5
  • Entrez Gene IDs:
    3567 (Human); 16191 (Mouse); 24497 (Rat); 397409 (Porcine); 280825 (Bovine); 403790 (Canine); 493803 (Feline)
  • Alternate Names:
    BCDF mu; B-cell differentiation factor I; BCGFII; EDF; Eo-CSF; Eosinophil differentiation factor; IL5; IL-5; IL-5T-cell replacing factor; interleukin 5 (colony-stimulating factor, eosinophil); interleukin-5; TRF; TRFB cell differentiation factor I
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