Human IL-20 Quantikine ELISA Kit

Catalog # Availability Size / Price Qty
DL200
Control Products Available
Human IL-20 ELISA Cell Culture Supernate Standard Curve
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Product Details
Procedure
Citations (3)
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Human IL-20 Quantikine ELISA Kit Summary

Assay Type
Solid Phase Sandwich ELISA
Format
96-well strip plate
Assay Length
4.5 hours
Sample Type & Volume Required Per Well
Cell Culture Supernates (100 uL), Serum (100 uL), EDTA Plasma (100 uL), Heparin Plasma (100 uL)
Sensitivity
16.6 pg/mL
Assay Range
62.5 - 4,000 pg/mL (Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma)
Specificity
Natural and recombinant human IL-20
Cross-reactivity
< 0.5% cross-reactivity observed with available related molecules.< 50% cross-species reactivity observed with species tested.
Interference
No significant interference observed with available related molecules.

Product Summary

The Quantikine Human IL-20 Immunoassay is a 4.5 hour solid-phase ELISA designed to measure human IL-20 in cell culture supernates, serum, and plasma. It contains E. coli-expressed recombinant human IL-20 and has been shown to accurately quantitate the recombinant factor. Results obtained using natural human IL-20 showed linear curves that were parallel to the standard curves obtained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for naturally occurring human IL-20.

Precision

Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested on one plate to assess intra-assay precision
Inter-Assay Precision (Precision between assays) Three samples of known concentration were tested in separate assays to assess inter-assay precision

Cell Culture Supernates

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 40 40 40
Mean 461 984 1983 491 961 1882
Standard Deviation 26.1 70.4 159 39.8 74.2 106
CV% 5.7 7.2 8 8.1 7.7 5.6

Serum, EDTA Plasma, Heparin Plasma

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 40 40 40
Mean 522 1143 2183 518 1079 2092
Standard Deviation 32.2 103 208 46.4 61.8 101
CV% 6.2 9 9.5 9 5.7 4.8

Recovery

The recovery of IL-20 spiked to levels throughout the range of the assay in various matrices was evaluated.

Sample Type Average % Recovery Range %
Cell Culture Media (n=4) 102 96-111
EDTA Plasma (n=4) 107 103-113
Heparin Plasma (n=4) 101 86-108
Serum (n=4) 100 91-109

Linearity

To assess the linearity of the assay, samples spiked with high concentrations of IL-20 were serially diluted with the appropriate Calibrator Diluent to produce samples with values within the dynamic range of the assay.
Human IL-20 ELISA Linearity

Data Examples

Human IL-20 ELISA Cell Culture Supernate Standard Curve

Human IL-20 ELISA Serum/Plasma Standard Curve

Product Datasheets

Preparation and Storage

Shipping
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: IL-20

Mature human and mouse IL-20 is a 152 amino acid protein that is not likely glycosylated. Although IL-20 is a distant member of the IL-10 family, it functions as a monomer. IL-20 binds two heterodimeric receptor complexes, IL-20 R alpha/IL-20 R beta and IL-22 R/IL-20 R beta. IL-20 is reported to induce the proliferation of multipotential hematopoietic progenitor cells, direct the differentiation and expansion of keratinocytes, and promote the release of proinflammatory mediators in keratinocytes and other IL-20 receptor-expressing cells.

Long Name:
Interleukin 20
Entrez Gene IDs:
50604 (Human); 58181 (Mouse)
Alternate Names:
Cytokine Zcyto10; IL10D; IL20; IL-20; IL-20ZCYTO10four alpha helix cytokine; interleukin 20; interleukin-20; MGC96907
⚠ WARNING: This product can expose you to chemicals including N,N-Dimethylforamide, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.

Assay Procedure

Refer to the product for complete assay procedure.

Bring all reagents and samples to room temperature before use. It is recommended that all samples, standards, and controls be assayed in duplicate.
  1.   Prepare all reagents, standard dilutions, and samples as directed in the product insert.
  2.   Remove excess microplate strips from the plate frame, return them to the foil pouch containing the desiccant pack, and reseal.

  3. 100 µL Assay Diluent
  4.   Add 100 µL of Assay Diluent to each well.

  5. 100 µL Standard, Control, or Sample
  6.   Add 100 µL of Standard, control, or sample to each well. Cover with a plate sealer, and incubate at room temperature for 2 hours.
  7.   Aspirate each well and wash, repeating the process 3 times for a total of 4 washes.

  8. 200 µL Conjugate
  9.   Add 200 µL of Conjugate to each well. Cover with a new plate sealer, and incubate at room temperature for 2 hours.
  10.   Aspirate and wash 4 times.

  11. 200 µL Substrate Solution
  12.   Add 200 µL Substrate Solution to each well. Incubate at room temperature for 30 minutes. PROTECT FROM LIGHT.

  13. 50 µL Stop Solution
  14.   Add 50 µL of Stop Solution to each well. Read at 450 nm within 30 minutes. Set wavelength correction to 540 nm or 570 nm.

Citations for Human IL-20 Quantikine ELISA Kit

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.

3 Citations: Showing 1 - 3
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  1. The Stimulation of Macrophages with TLR Ligands Supports Increased IL-19 Expression in Inflammatory Bowel Disease Patients and in Colitis Models
    Authors: A Steinert, I Linas, B Kaya, M Ibrahim, A Schlitzer, P Hruz, K Radulovic, L Terraccian, AJ Macpherson, JH Niess
    J. Immunol., 2017;0(0):.
    Species: Human
    Sample Types: Serum
  2. Regulation of IL-20 Expression by Estradiol through KMT2B-Mediated Epigenetic Modification
    PLoS ONE, 2016;11(11):e0166090.
    Species: Human
    Sample Types: Cell Culture Supernates
  3. The Th17 cytokine IL-22 induces IL-20 production in keratinocytes: a novel immunological cascade with potential relevance in psoriasis.
    Authors: Wolk K, Witte E, Warszawska K, Schulze-Tanzil G, Witte K, Philipp S, Kunz S, Docke WD, Asadullah K, Volk HD, Sterry W, Sabat R
    Eur. J. Immunol., 2009;39(12):3570-81.
    Species: Human
    Sample Types: Serum

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