Human IL-1ra/IL-1F3 DuoSet ELISA, 15 Plate



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Reactivity HuSpecies Glossary
Applications ELISA

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Human IL-1ra/IL-1F3 DuoSet ELISA, 15 Plate Summary

Assay Type
Solid Phase Sandwich ELISA
See PDF Datasheet for details
See PDF Datasheet for details
Spike Recovery
See PDF Datasheet for details
Sample Volume
See PDF Datasheet for details


Application Notes
No significant interference observed with available related molecules.
Read Publications using DY280.

Packaging, Storage & Formulations

Store the unopened product at 2 - 8 °C. Do not use past expiration date.


This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Human IL-1ra/IL-1F3 DuoSet ELISA, 15 Plate

  • DIRA
  • ICIL-1ra
  • IL1F3
  • IL-1F3
  • IL1ra
  • IL-1ra
  • IL-1ra3
  • IL1RN
  • IL-1RN
  • interleukin 1 receptor antagonist
  • IRAP
  • MVCD4


Interleukin-1 receptor antagonist (IL-1ra; also known as IL-1F3) is a 22-25 kDa member of the IL-1 family of cytokines. Currently, there are 11 family members (IL-1F1-F11), nine of which form an IL-1 gene cluster on human Ch2 (1-3). Each IL-1 family member contains an IL-1 fold. This fold is generated by 12 packed beta -sheets that interact to form a beta -trefoil structure. Little amino acid (aa) homology is required to achieve this structure, and this explains the low aa identity among IL-1 family members. IL-1ra is a pure cytokine receptor antagonist that has no signal transduction-initiating activity (4). It is an acute phase protein that exists to dampen inflammation. IL-1( beta ) is initially produced by monocytes in response to a variety of stimuli. Circulating IL-1 then binds to widely expressed IL-1 type I receptors (IL-1 RI) and initiates a number of pro-inflammatory events. On endothelial cells (EC), IL-1 induces PGE2 and IL-6 release, generating fever, thrombocytosis, and hepatic acute phase protein production. In synovial joints, IL-1 induces chondrocyte NO production, an event that leads to reduced collagen synthesis and chondrocyte apoptosis. Finally, IL-1 increases neutrophil counts, both in blood and tissue, and thus is able to promote a pro-inflammatory environment in multiple locations (5-8). IL-1ra blocks IL-1 action through competitive inhibition. More correctly, although IL-1ra fills the IL-1 binding site in IL-1 RI, it is also unable to orchestrate the creation of a signal-transducing IL-1 RI:IL-1 R Accessory protein (IL-1 R AcP) heterodimer complex. Effective IL-1ra concentrations are generally 100-fold greater than local IL-1 concentrations. This is because the IL-1ra half-life is but 6 minutes, and very few IL-1 type I receptors need to be engaged by IL-1 to elicit a cellular response (5, 7, 9). 
Human IL-1ra is synthesized as a 177 aa precursor that contains a 25 aa signal sequence and a 152 aa mature region (10, 11). Although it contains an IL-1 cytokine fold, it apparently lacks two structural motifs that allow for activation of the IL-1 receptor heterodimer. First, and following binding to IL-1 RI, the presence of Ile 51-His 54 and Lys 145 of the mature molecule preclude recruitment of IL-1 R AcP. Second, there is no identifiable C-terminal lectin segment that is hypothesized to help recruit an accessory signaling component (1, 12, 13). Mature human IL-1ra is 77% and 82% aa identical to mouse and canine IL-1ra, respectively, and human IL-1ra inhibits IL-1 activity on mouse cells (10). A number of cell types express IL-1ra, including monocytes (11), Sertoli cells (14), hepatocytes (15), adipocytes (16), synovial fibroblasts (17), mast cells (18), pancreatic beta -cells (19), and intestinal epithelial cells (20). There are at least three intracellular IL-1ra isoforms (icIL-1ra1, 2, and 3). All show N-terminal variation, and all contain amino acids 35-177 of the secreted precursor (21-23). Intracellular IL-1ra1 is of particular interest, because it is reported to be "secreted" by endothelial cells and binds to the IL-1 RI in an antagonist fashion (23-25). Intracellular IL-1ra1 is 159 aa in length and shows a 3 aa substitution for the first 21 aa's of the signal sequence of IL-1ra (21).

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Publications for IL-1ra/IL-1F3/IL1RN (DY280)(15)

We have publications tested in 1 confirmed species: Human.

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Showing Publications 1 - 10 of 15. Show All 15 Publications.
Publications using DY280 Applications Species
E Kuca-Warna, U Skalska, I Janicka, U Musia?owic, K Bonek, P G?uszko, P Szcz?sny, M Olesi?ska, E Kontny The Phenotype and Secretory Activity of Adipose-Derived Mesenchymal Stem Cells (ASCs) of Patients with Rheumatic Diseases Cells, 2019;8(12):. 2019 [PMID: 31861245] (Human) Human
NE Powers, B Swartzwelt, C Marchetti, DM de Graaf, A Lerchner, M Schlapschy, R Datar, U Binder, CK Edwards, A Skerra, CA Dinarello PASylation of IL-1 Receptor antagonist (IL-1Ra) retains IL-1 blockade and extends its duration in mouse urate crystal-induced peritonitis J. Biol. Chem., 2019;0(0):. 2019 [PMID: 31819009] (Human) Human
A Lindblad, K Persson, I Demirel IL-1RA is part of the inflammasome-regulated immune response in bladder epithelial cells and influences colonization of uropathogenic E. coli Cytokine, 2019;123(0):154772. 2019 [PMID: 31299415] (Human) Human
T Tyagi, M Alarab, Y Leong, S Lye, O Shynlova Local oestrogen therapy modulates extracellular matrix and immune response in the vaginal tissue of post-menopausal women with severe pelvic organ prolapse J. Cell. Mol. Med., 2019;0(0):. 2019 [PMID: 30772947] (Human) Human
LM Scott, AH Bryant, A Rees, B Down, RH Jones, CA Thornton Production and regulation of interleukin-1 family cytokines at the materno-fetal interface Cytokine, 2017;0(0):. 2017 [PMID: 28712670] (Human) Human
Damien Dietrich Interleukin-36 potently stimulates human M2 macrophages, Langerhans cells and keratinocytes to produce pro-inflammatory cytokines Cytokine, 2016;84(0):88-98. 2016 [PMID: 27259168] (Human) Human
Schupp J, Binder H, Jager B, Cillis G, Zissel G, Muller-Quernheim J, Prasse A Macrophage activation in acute exacerbation of idiopathic pulmonary fibrosis. PLoS ONE, 2015;10(1):e0116775. 2015 [PMID: 25590613] (Human) Human
Greenlee-Wacker M, Rigby K, Kobayashi S, Porter A, DeLeo F, Nauseef W Phagocytosis of Staphylococcus aureus by human neutrophils prevents macrophage efferocytosis and induces programmed necrosis. J Immunol, 2014;192(10):4709-17. 2014 [PMID: 24729616] (Human) Human
Haddad L, Sirois M Angiopoietin-1 upregulates de novo expression of IL-1beta and Il1-Ra, and the exclusive release of Il1-Ra from human neutrophils. PLoS ONE, 2014;9(2):e88980. 2014 [PMID: 24563688] (Human) Human
Uciechowski P, Oellig E, Mariani E, Malavolta M, Mocchegiani E, Rink L Effects of human Toll-like receptor 1 polymorphisms on ageing. Immun Ageing, 2013;10(1):4. 2013 [PMID: 23391127] (Human) Human
Show All 15 Publications.

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FAQs for IL-1ra/IL-1F3/IL1RN (DY280). (Showing 1 - 1 of 1 FAQs).

  1. wondering what the difference is between your quantikine and duo set elisas?
    • Usually the duosets do not have the entire kit such as plates and buffers, whereas the other kits are complete.

Other Available Formats

Biotin DY280
Biotin DY280

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Gene Symbol IL1RN