Interleukin-2 (IL-2)

Links to databases

IL-2 is a cytokine that upon binding to its receptor IL-2R stimulates proliferation of T cells, but it can also stimulate other immune cells. IL-2 plays and important role in T cell immunologic memory as well as in maturation of regulatory T cells for regulation of autoimmunity. IL-2 was the first interleukin molecule to be identified and characterized, and it has been described in many inflammation-related diseases. IL-2 has a clinical application in the treatment of certain cancers and is being tested as an adjuvant in vaccines in the treatment of chronic viral infections. Note: This assay does not detect the low levels of IL-2 present in plasma from healthy individuals. The assay does, however, detect IL-2 in plasma, serum and other sample types from inflammatory diseases where higher levels of this protein are expressed.

Sample type

Recommended sample types are EDTA plasma and serum. A range of additional sample types are compatible with the technology (PEA), including citrate plasma, heparin plasma, cerebrospinal fluid, (CSF), tissue and cell lysates, fine needle biopsis, microdialysis fluid, cell culture media, dried blood spots, synovial fluid, saliva, plaque extract and microvesicles. Please note that protein expression levels are expected to vary in different sample types. Certain assays are differentially affected by interfering substances such as hemolysate. Download any of our Data Validation documents or contact for more information.

Analytical Measuring Range

Please note: the technical data reported below refers to the measured value in the in vitro validation assays. The calibrator curve below shows the performance of the assay with the estimated sensitivity and dynamic range parameters indicated. These curves are generated during the assay validation process using recombinant antigens. Please note that when analyzing biological samples the data generated will be given in the form of relative quantification (NPX values) and cannot be converted to absolute protein concentrations. For more info about NPX measurements, please visit our FAQ page (

    • LOD (pg/mL)
    • 122.07
    • LLOQ (pg/mL)
    • 122.07
    • ULOQ (pg/mL)
    • 500000
    • Hook (pg/mL)
    • 1000000
    • Range (logs)
    • 3.6

Calibrator curve generated in multiplex

Interleukin-2  (IL-2)


    • Within run precision Coefficient of Variation (CV)
    • 12%
    • Between run precision Coefficient of Variation (CV)
    • 7%

Precision (repeatability) is calculated from linearized NPX values over LOD.

Biomarker Validation Data

Additional validation data, as well as a more detailed description of how the Olink panels are quality controlled can be found in our Data Validation documents. To download or to learn more go to the Data Validation page.

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