Interleukin-1 Alpha (IL-1 Alpha) ELISA Kit


Human IL-1 alpha ELISA kit is a method for measuring in vitro quantitative levels of interleukin-1 alpha (IL-1α, IL-1a, IL-1 alpha) in human biological fluids, serum, plasma (EDTA, citrate, heparin) and tissue homogenates. This assay has a minimum detection limit of 2.344 pg/ml.


Interleukin-1 alpha (IL-1α or IL-1a), belongs to the interleukin 1 family which represents biologically active cell-derived mono nuclear proteins that are involved in immune responses and inflammatory reactions. There are currently two distinct human IL-1 species that have been identified IL-1 alpha and IL-1 beta. They are both biologically distinct but distantly related, sharing similarities such as molecular weight, same receptors on target cells and similar biological effects. Also, they are both polypeptidic cytokines that play vital functions in immunologic reactions, tissue repair and inflammation. IL-1α is however predominantly a cell-associated molecule when compared to IL-1β which is a secreted molecule.

Interleukin-1 alpha is an extracellular peptide which is 17kDa in size and its activity has been demonstrated in a number of biological fluids including serum, gingival fluid, urine, cerebrosinal fluid, amniotic fluid, synovial fluid, sputum and bronchoalveolar lavage (BAL) fluid. IL-1 alpha is usually synthesized primarily as a 31 kDa precursor which lacks a signal peptide. This precursor is cleaved through the cysteine protease calpain, leading to the production of 17.5 kDa mature IL-1 molecule. Furthermore, IL-1α can be formed in monocytes and many other cells in the 31 kDa precursor state.  Interleukin-1 alpha has the ability to act on monocytes or macrophages through inducing its own synthesis in addition to the production of IL-6 and TNF.

IL-1 alpha can also induce the production of GM-CSF, IL-4 from activated T cells, IL-2 receptors and IL-2. IL-1α can increase immunoglobulin synthesis, stimulate B cell proliferation and maturation, induce prostaglandin synthesis in endothelial cells and smooth muscle cells, NK cell activation and LAK production associated with other cytokines, cartilage and calcium resorption in bones and collagenase production in synovial cells. There is also evidence that high levels of IL-1 alpha are associated with rheumatoid arthritis, atherosclerosis, inflammatory bowel disease, insulin-dependent diabetes mellitus, sepsis, acute and chronic myelogenous leukemia.


All reagents supplied need to be stored at 2 °C – 8 °C, unopened reagents will retain reactivity until expiration date. Do not use reagents beyond this date.

  • One 96-Well Plate: Pre-coated with anti-human IL-1 alpha antibody.
  • Standards: Concentrations 0, 3.906, 7.812, 15.625, 31.25, 62.5, 125, 250 pg/ml, made up from lyophilized recombinant human interleukin-1 alpha.
  • Sample/Standard Dilution Buffer.
  • Biotinylated-labelled IL-1 alpha Antibody.
  • Antibody Dilution Buffer.
  • HRP-Streptavidin Conjugate (SABC).
  • SABC Dilution Buffer.
  • TMB Substrate.
  • Wash Buffer (25x).
  • Plate Sealer.
  • Product Instructions.


The minimum detection sensitivity level of interleukin-1 alpha (IL-1 alpha, IL-1α, IL-1a) using current human IL-1 alpha ELISA kit was approximately 2.344 pg/ml. The dynamic range for this assay is 3.906 – 250 pg/ml.


– Interleukin-1 Alpha (IL-1 Alpha): ELISA
– Specificity: Highly specific for IL-1 alpha, no cross reactivity or interference between IL-1 alpha and analogues was detected.
– Recovery: Serum (97 – 102%), EDTA Plasma (86 – 103%), Heparin Plasma (86 – 103%).
– Linearity: Serum (89 – 102%), EDTA Plasma (88 – 99%), Heparin Plasma (82 – 91%).
– Precison Intra-Assay: CV < 8%.
– Precison Inter-Assay: CV < 10%.
– Stability: Less than 10%.


  1. Interleukin 1α and the inflammatory process. Nat Immunol. (2016) 17 (8): 906-13. Review. Di Paolo N.C. and Shayakhmetov D.M.
  2. Molecular cloning, overexpression and characterization of human interleukin 1alpha. Biochem Biophys Res Commun. (2007) 360 (3): 604-8. Rajalingam D., et al.
  3. Gene polymorphism of interleukin-1 alpha and beta in keratocystic odontogenic tumors. J Oral Pathol Med. (2012) 41 (9): 697-701. Eshghyar N., et al.
  4. Treating inflammation by blocking interleukin-1 in humans. Semin Immunol. (2013) 25 (6): 469-84. Review. Dinarello C.A. and van der Meer J.W.
  5. Interleukin-1α and brain inflammation. IUBMB Life. (2015) 67 (5): 323-30. Review. Brough D. and Denes A.


  • Full Name: Interleukin-1 Alpha (IL-1 Alpha) ELISA Kit
  • Reactivity: Human
  • Sample Type: Tissue Homogenates, Serum, Plasma, Biological Fluid
  • Sensitivity: 2.344 pg/ml



Your secretory IgA ELISA gave good results and I was also really impressed with how quickly we received it.

L. Johnston
PhD Student / University of Glasgow

It is refreshing to know that you have a technical team that is very knowledgeable. I have already recommended your company to other researchers in our department.

Dr. P. Anderson
Lecturer / University College London (UCL)

I am a first time user and found that your instruction manual was very easy to follow. The insulin ELISA assay performed well and I was happy with the results that were generated.

J. Thomas
Senior Technician / Addenbrooke’s Hospital

I carried out a pilot study comparing the performance of many ELISA assay's from different suppliers and found your kits to be one of the better performers. We observed good linearity and tight replicates.

Dr. C. Davies
Lead Scientists / AstraZeneca

You are my first point of contact when I am looking to purchase ELISA. You have such an easy and simple system, yet it is very effective.

A. Shaw
Purchasing / University of Oxford