Feline IL-1 beta /IL-1F2 Antibody AF1796: R&D Systems

Feline IL-1 beta /IL-1F2 Antibody

  
  • Species Reactivity
    Feline
  • Specificity
    Detects IL‑1 beta /IL‑1F2 in ELISAs and Western blots. In sandwich immunoassays, less than 0.1% cross-reactivity with recombinant human IL‑1 beta, recombinant mouse IL-1 beta, and recombinant canine IL-1 beta is observed.
  • Source
    Polyclonal Goat IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    E. coli-derived recombinant feline IL‑1 beta /IL‑1F2
    Ala116-Ser267
    Accession # P41687
  • 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
    0.1 µg/mL
    Recombinant Feline IL‑1 beta /IL‑1F2 (Catalog # 1796-FL)
  • Immunocytochemistry
    5-15 µg/mL
    Immersion fixed feline peripheral blood mononuclear cells
    • Feline IL-1 beta /IL-1F2 Sandwich Immunoassay
      Reagent
  • ELISA Capture (Matched Antibody Pair)
    0.2-0.8 µg/mL 
    Feline IL‑1 beta /IL‑1F2 Antibody (Catalog # AF1796)
  • ELISA Detection (Matched Antibody Pair)
    0.1-0.4 µg/mL 
    Feline IL‑1 beta /IL‑1F2 Biotinylated Antibody (Catalog # BAF1796)
  • ELISA Standard
     
    Recombinant Feline IL-1 beta/IL-1F2 Protein (Catalog # 1796-FL)
  • Neutralization
    Measured by its ability to neutralize IL‑1 beta /IL‑1F2-induced proliferation in the D10.G4.1 mouse helper T cell line. Symons, J. A. et al. (1987) in Lymphokines and Interferons, a Practical Approach. Clemens, M. J. et al. (eds): IRL Press. 272. The Neutralization Dose (ND50) is typically 0.02-0.08 µg/mL in the presence of 50 pg/mL Recombinant Feline IL‑1 beta /IL‑1F2 and 1.25 µg/mL concanavalin A.
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‑1 beta /IL‑1F2 and Neutral­ization by Feline IL‑1 beta /IL‑1F2 Antibody. Recombinant Feline IL‑1 beta /IL‑1F2 (Catalog # 1796‑FL) stimulates proliferation in the the D10.G4.1 mouse helper T cell line in a dose-dependent manner (orange line). Proliferation elicited by Recombinant Feline IL‑1 beta /IL‑1F2 (50 pg/mL) is neutralized (green line) by increasing concen­trations of Goat Anti-Feline IL‑1 beta /IL‑1F2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1796). The ND50 is typically 0.02‑0.08 µg/mL in the presence of concanavalin A (1.25 µg/mL).
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.2 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-1 beta/IL-1F2

IL-1 is a name that designates two pleiotropic cytokines, IL-1 alpha (IL-1F1) and IL-1 beta (IL-1F2), which are the products of distinct genes. IL-1 alpha and IL-1 beta are structurally related polypeptides that share approximately 27% amino acid (aa) identity in feline. Both proteins are produced by a wide variety of cells in response to inflammatory agents, infections, or microbial endotoxins. While IL-1 alpha and IL-1 beta are regulated independently, they bind to the same receptor and exert identical biological effects. IL‑1 RI binds directly to IL-1 alpha or IL-1 beta and then associates with the IL-1 R accessory protein (IL-1 R3/IL-1 R AcP) to form a high-affinity receptor complex that is competent for signal transduction. IL-1 RII has high affinity for IL-1 beta but functions as a decoy receptor and negative regulator of IL-1 beta activity. IL-1ra functions as a competitive antagonist by preventing IL-1 alpha and IL-1 beta from interacting with IL-1 RI (1‑4). The feline IL-1 beta cDNA encodes a 267 aa precursor. A 115 aa propeptide is cleaved intracellularly by the cysteine protease IL-1 beta -converting enzyme (Caspase-1/ICE) to generate the active cytokine (5, 6). The 17 kDa mature feline IL-1 beta shares 63%‑78% aa sequence identity with canine, cotton rat, equine, human, mouse, porcine, rat, and rhesus IL-1 beta.

  • References:
    1. Allan, S.M. et al. (2005) Nat. Rev. Immunol. 5:629.
    2. Boraschi, D. and A. Tagliabue (2006) Vitam. Horm. 74:229.
    3. Kornman, K.S. (2006) Am. J. Clin. Nutr. 83:475S.
    4. Isoda, K. and F. Ohsuzu (2006) J. Atheroscler. Thromb. 13:21.
    5. Accession # AAA30814.
    6. Martinon, F. and J. Tschopp (2007) Cell Death Differ. 14:10.
  • Long Name:
    Interleukin 1 beta
  • Entrez Gene IDs:
    3553 (Human); 16176 (Mouse); 24494 (Rat); 397122 (Porcine); 403974 (Canine); 100034237 (Equine); 100135556 (Guinea Pig)
  • Alternate Names:
    catabolin; IL1 beta; IL-1 beta; IL-1; IL1B; IL-1b; IL1-BETA; IL-1F2; IL1F2IL-1 beta; interleukin 1, beta; interleukin-1 beta; preinterleukin 1 beta; pro-interleukin-1-beta
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