Human ST2/IL-33R Antibody

Catalog # Availability Size / Price Qty
IFN-gamma  Secretion Induced by IL‑33 and Neutralization by Human ST2/IL-33 R Antibody.
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Product Details
Citations (8)
Supplemental Products

Human ST2/IL-33R Antibody Summary

Species Reactivity
Detects human ST2/IL-33 R in ELISAs and Western blots. In Western blots, no cross-reactivity with recombinant mouse ST2L, recombinant human (rh) IL-1 RI, rhIL-1 RII, rhIL-1 RA, rhIL-1 alpha, or rhIL-1 beta is observed.
Monoclonal Mouse IgG1 Clone # 97203
Protein A or G purified from hybridoma culture supernatant
S. frugiperda insect ovarian cell line Sf 21-derived recombinant human ST2/IL-33 R
Accession # BAA02233
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
1 µg/mL
Recombinant Human ST2/IL‑1 R4 Fc Chimera (Catalog # 523-ST)

Human/Primate ST2/IL-33 R Sandwich Immunoassay

Recommended Concentration
ELISA Capture (Matched Antibody Pair)
2-8 µg/mL 

Use in combination with:

Detection Reagent: Human/Primate ST2/IL-33R Biotinylated Antibody (Catalog # BAF523)

Standard: Recombinant Human ST2/IL-33R Fc Chimera Protein, CF (Catalog # 523-ST)

Measured by its ability to neutralize IL‑33-induced IFN-gamma secretion in Human Peripheral Blood Mononuclear cells (PBMC).The Neutralization Dose (ND50) is typically 0.3-1.5 μg/mL in the presence of 1 ng/mL Recombinant Human IL‑33.

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 IFN-gamma  Secretion Induced by IL‑33 and Neutralization by Human ST2/IL-33 R Antibody. View Larger

IFN-gamma Secretion Induced by IL‑33 and Neutralization by Human ST2/IL-33 R Antibody. Recombinant Human IL-33 induces IFN-gamma secretion in Human Peripheral Blood Mononuclear cells (PBMC) in the presence of Recombinant Human IL-12 (Catalog # 219-IL) in a dose-dependent manner (orange line), as measured by the Human IFN-gamma Quantikine ELISA Kit (Catalog # DIF50C). Under these conditions, IFN-gamma secretion elicited by IL-33 is neutralized (green line) by increasing concentrations of Mouse Anti-Human/Primate ST2/IL-33 R Monoclonal Antibody (Catalog # MAB523). The ND50 is typically 0.3-1.5 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 0.5 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
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: ST2/IL-33R

ST2, also known as IL-33R, IL-1 R4 and T1, is an Interleukin-1 receptor family glycoprotein that contributes to Th2 immune responses (1, 2). Human ST2 consists of a 310 amino acid (aa) extracellular domain (ECD) with three Ig-like domains, a 21 aa transmembrane segment, and a 207 aa cytoplasmic domain with an intracellular TIR domain (3, 4). Alternate splicing of the 120 kDa human ST2 generates a soluble 60 kDa isoform that lacks the transmembrane and cytoplasmic regions as well as an isoform that additionally lacks the third Ig‑like domain (4). Within the ECD, human ST2 shares 68% and 64% aa sequence identity with mouse and rat ST2, respectively. ST2 is expressed on the surface of mast cells, activated Th2 cells, macrophages, and cardiac myocytes (5‑8). It binds IL-33, a cytokine that is upregulated by inflammation or mechanical strain in smooth muscle cells, airway epithelia, keratinocytes, and cardiac fibroblasts (5, 9). IL-33 binding induces the association of ST2 with IL-1R AcP, a shared signaling subunit that also associates with IL-1 RI and IL-1 R rp2 (1, 10, 11). In macrophages, ST2 interferes with signaling from IL-1 RI and TLR4 by sequestering the adaptor proteins MyD88 and Mal (7). In addition to its role in promoting mast cell and Th2 dependent inflammation, ST2 activation enhances antigen induced hypernociception and protects from atherosclerosis and cardiac hypertrophy (5, 12‑14). The soluble ST2 isoform is released by activated Th2 cells and strained cardiac myocytes and is elevated in the serum in allergic asthma (6, 8, 15). Soluble ST2 functions as a decoy receptor that blocks IL‑33's ability to signal through transmembrane ST2 (10, 13‑15).

  1. Barksby, H.E. et al. (2007) Clin. Exp. Immunol. 149:217.
  2. Gadina, M. and C.A. Jefferies (2007) Science STKE 2007:pe31.
  3. Tominaga, S. et al. (1992) Biochim. Biophys. Acta 1171:215.
  4. Li, H. et al. (2000) Genomics 67:284.
  5. Schmitz, J. et al. (2005) Immunity 23:479.
  6. Lecart, S. et al. (2002) Eur. J. Immunol. 32:2979.
  7. Brint, E.K. et al. (2004) Nat. Immunol. 5:373.
  8. Weinberg, E.O. et al. (2002) Circulation 106:2961.
  9. Sanada S. et al. (2007) J. Clin. Invest. 117:1538.
  10. Palmer, G. et al. (2008) Cytokine 42:358.
  11. Chackerian, A.A. et al. (2007) J. Immunol. 179:2551.
  12. Allakhverdi, Z. et al. (2007) J. Immunol. 179:2051.
  13. Verri Jr., W.A. et al. (2008) Proc. Natl. Acad. Sci. 105:2723.
  14. Miller, A.M. et al. (2008) J. Exp. Med. 205:339.
  15. Hayakawa, H. et al. (2007) J. Biol. Chem. 282:26369.
Long Name
Interleukin 33 Receptor
Entrez Gene IDs
9173 (Human); 17082 (Mouse)
Alternate Names
DER4; DER4ST2growth stimulation-expressed; Fit-1; IL-1 R4; IL1R4; IL-1R4; IL-1RL1; IL-33 R; IL33R; IL-33R; interleukin 1 receptor-like 1; interleukin 1 receptor-related protein; interleukin-1 receptor-like 1; Ly84; MGC32623; Protein ST2; ST2; ST2L; ST2V; T1; T1homolog of mouse growth stimulation-expressed

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Citations for Human ST2/IL-33R 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.

8 Citations: Showing 1 - 8
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  1. High-dimensional profiling clusters asthma severity by lymphoid and non-lymphoid status
    Authors: MJ Camiolo, X Zhou, TB Oriss, Q Yan, M Gorry, W Horne, JB Trudeau, K Scholl, W Chen, JK Kolls, P Ray, FJ Weisel, NM Weisel, N Aghaeepour, K Nadeau, SE Wenzel, A Ray
    Cell Reports, 2021;35(2):108974.
    Species: Human
    Sample Types: Whole Cells
    Applications: Flow Cytometry
  2. From proteomics to discovery of first-in-class ST2 inhibitors active in vivo
    Authors: AM Ramadan, E Daguindau, JC Rech, K Chinnaswam, J Zhang, GL Hura, B Griesenaue, Z Bolten, A Robida, M Larsen, JA Stuckey, CY Yang, S Paczesny
    JCI Insight, 2018;3(14):.
    Species: Human
    Sample Types: Recombinant Protein
    Applications: AlphaLISA
  3. Interleukin-33 Predicts Poor Prognosis and Promotes Renal Cell Carcinoma Cell Growth Through its Receptor ST2 and the JNK Signaling Pathway
    Authors: CW Wu, YG Wu, C Cheng, ZD Hong, ZM Shi, SQ Lin, J Li, XY He, AY Zhu
    Cell. Physiol. Biochem., 2018;47(1):191-200.
    Species: Human
    Sample Types: Whole Cells
    Applications: Neutralization
  4. A functional IL1RL1 variant regulates corticosteroid-induced sST2 expression in ulcerative colitis
    Authors: D Díaz-Jimén, L Núñez, M De la Fuen, K Dubois-Cam, H Sepúlveda, M Montecino, A Torres-Riq, P García-Gon, J Chnaiderma, A Vossenkamp, TT MacDonald, D Simian, MJ González, JA Cidlowski, R Quera, MA Hermoso
    Sci Rep, 2017;7(1):10180.
    Species: Human
    Sample Types: Whole Tissue
    Applications: IHC-P
  5. Daily exposure to dust alters innate immunity.
    Authors: Sahlander K, Larsson K, Palmberg L
    PLoS ONE, 2012;7(2):e31646.
    Species: Human
    Sample Types: Whole Cells
    Applications: Neutralization
  6. The role of IL-33 and its receptor ST2 in human nasal epithelium with allergic rhinitis.
    Authors: Kamekura R, Kojima T, Takano K, Go M, Sawada N, Himi T
    Clin. Exp. Allergy, 2012;42(2):218-28.
    Species: Human
    Sample Types: Whole Cells
    Applications: Neutralization
  7. IL-1 Family Members IL-18 and IL-33 Upregulate the Inflammatory Potential of Differentiated Human Th1 and Th2 Cultures.
    Authors: Blom L, Poulsen L
    J Immunol, 2012;189(9):4331-7.
    Species: Human
    Sample Types: Whole Cells
    Applications: Neutralization
  8. Effect of ovarian steroids on gene expression profile in human uterine microvascular endothelial cells.
    Authors: Yasuo T, Kitaya K
    Fertil. Steril., 2009;92(2):709-21.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot


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