Human IL-1 RII Antibody

Catalog # Availability Size / Price Qty
IL‑1 RII Inhibition of IL‑1 beta /IL‑1F2-dependent Cell Proliferation and Neutralization by Human IL‑1 RII Antibody.
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Product Details
Citations (6)
Supplemental Products
Reviews (3)

Human IL-1 RII Antibody Summary

Species Reactivity
Detects human IL‑1 RII in direct ELISAs and Western blots. In direct ELISAs, less than 1% cross‑reactivity with recombinant human (rh) IL‑1 alpha, rhIL‑1 RI, recombinant mouse (rm) IL‑1 alpha, rhIL‑1 beta, rmIL‑1 beta, recombinant rat IL‑1 beta, rhIL‑1ra, rmIL‑1ra, and recombinant rhesus monkey IL‑1ra is observed.
Polyclonal Goat IgG
Antigen Affinity-purified
S. frugiperda insect ovarian cell line Sf 21-derived recombinant human IL‑1 RII
Phe14-Glu343 (Ser56Gly and Glu297Gly)
Accession # P27930
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.


Recommended Concentration
Western Blot
0.1 µg/mL
Recombinant Human IL‑1 RII (Catalog # 263-2R)
Measured by its ability to neutralize IL‑1 RII-mediated inhibition of proliferation in the D10.G4.1 mouse helper T cell line. The Neutralization Dose (ND50) is typically 15-30 µg/mL in the presence of 2 µg/mL Recombinant Human IL‑1 RII, 50 pg/mL Recombinant Human IL‑1 beta /IL‑1F2.

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 IL‑1 RII Inhibition of IL‑1 beta /IL‑1F2-dependent Cell Proliferation and Neutralization by Human IL‑1 RII Antibody. View Larger

IL‑1 RII Inhibition of IL‑1 beta /IL‑1F2-dependent Cell Proliferation and Neutralization by Human IL‑1 RII Antibody. Recombinant Human IL-1 RII (263-2R) inhibits Recombinant Human IL-1 beta /IL-1F2 (201-LB) induced proliferation in the D10.G4.1 mouse helper T cell line in a dose-dependent manner (orange line). Inhibition of Recombinant Human IL-1 beta /IL-1F2 (50 pg/mL) activity elicited by Recombinant Human IL-1 RII (2 µg/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Human IL-1 RII Antigen Affinity-purified Polyclonal Antibody (Catalog # AF-263-NA). The ND50 is typically 15‑30 µg/mL.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Preparation and Storage

Reconstitute at 0.2 mg/mL in sterile PBS.
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 RII

Two distinct types of receptors that bind the pleiotropic cytokines IL-1 alpha and IL-1 beta have been described. The IL-1 receptor type I is an 80 kDa transmembrane protein that is expressed predominantly by T cells, fibroblasts and endothelial cells. IL-1 receptor type II is a 68 kDa transmembrane protein found on B lymphocytes, neutrophils, monocytes, large granular leukocytes and endothelial cells. Both receptors are members of the immunoglobulin superfamily and show approximately 28% sequence similarity in their extracellular domains. The two receptor types do not heterodimerize in a receptor complex.

An IL-1 receptor accessory protein that can heterodimerize with the type I receptor in the presence of IL-1 alpha or IL-1 beta but not IL-1ra, was identified (1). This type I receptor complex appears to mediate all the known IL-1 biological responses. The receptor type II has a short cytoplasmic domain and does not transduce IL-1 signals. In addition to the membrane-bound form of IL-1 RII, a naturally-occurring soluble form of IL-1 RII has been described. It has been suggested that the type II receptor, either as the membrane-bound or as the soluble form, serves as a decoy for IL-1 and inhibits IL-1 action by blocking the binding of IL-1 to the signaling type I receptor complex. Recombinant IL-1 soluble receptor type II is a potent antagonist of IL-1 action.

  1. Greenfeder, S. et al. (1995) J. Biol. Chem. 270:13757.
Long Name
Interleukin 1 Receptor II
Entrez Gene IDs
7850 (Human); 16178 (Mouse)
Alternate Names
beta; CD121b antigen; CD121b; IL-1 R beta; IL-1 RII; IL1R2; IL1RBCD121 antigen-like family member B; IL-1R-beta; IL1RII; IL-1RII; IL-1RT2; IL-1RT-2; interleukin 1 receptor, type II; Interleukin-1 receptor beta; MGC47725

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Citations for Human IL-1 RII Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

6 Citations: Showing 1 - 6
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  1. IL-1R2 expression in human gastric cancer and its clinical significance
    Authors: M Yuan, L Wang, H Huang, Y Li, X Zheng, Q Shao, J Jiang
    Bioscience Reports, 2021-03-26;0(0):.
    Species: Human
    Sample Types: Whole Tissue
    Applications: IHC
  2. Human gastrointestinal epithelia of the esophagus, stomach, and duodenum resolved at single-cell resolution
    Authors: GA Busslinger, BLA Weusten, A Bogte, H Begthel, LAA Brosens, H Clevers
    Cell Reports, 2021-03-09;34(10):108819.
    Species: Human
    Sample Types: Organoid
    Applications: IHC
  3. Ectopic expression of interleukin-1 receptor type II enhances cell migration through activation of the pre-interleukin 1alpha pathway.
    Authors: Chang SY, Su PF, Lee TC
    Cytokine, 2008-11-20;45(1):32-8.
    Species: Human
    Sample Types: Whole Cells
    Applications: ICC
  4. Chorionic gonadotropin down-regulates the expression of the decoy inhibitory interleukin 1 receptor type II in human endometrial epithelial cells.
    Authors: Herrmann-Lavoie C, Rao CV, Akoum A
    Endocrinology, 2007-08-16;148(11):5377-84.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot
  5. Synergism of TNF and IL-1 in the induction of matrix metalloproteinase-3 in trabecular meshwork.
    Authors: Kelley MJ, Rose AY, Song K, Chen Y, Bradley JM, Rookhuizen D, Acott TS
    Invest. Ophthalmol. Vis. Sci., 2007-06-01;48(6):2634-43.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot
  6. Estrogen’s bone-protective effects may involve differential IL-1 receptor regulation in human osteoclast-like cells
    Species: Human
    Sample Types: Whole Cells
    Applications: Neutralization


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Reviews for Human IL-1 RII Antibody

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Human IL-1 RII Antibody
By Anonymous on 05/02/2018
Application: WB Sample Tested: Pancreatic cancer cells Species: Human

Human IL‑1 RII Antibody
By Anonymous on 03/23/2018
Application: WB Sample Tested: Human recombinant test antibody Species: Human

Human IL-1 RII Antibody
By Anonymous on 11/09/2017
Application: ELISA Sample Tested: Cell culture supernatant,Serum and Plasma Species: Human

MAB663 was used as the capture and AF263 was used as the detection antibody for the sandwich ELISA for sIL-1R2. The immunoassay standard was 263-2R. Assay had sensitivity of ~10pg/ml.