Human IL-18 ELISA Kit (ab215539)
Key features and details
- One-wash 90 minute protocol
- Sensitivity: 8.3 pg/ml
- Range: 62.5 pg/ml - 4000 pg/ml
- Sample type: Cell culture extracts, Cell culture supernatant, Cit plasma, EDTA Plasma, Hep Plasma, Serum, Tissue Extracts, Urine
- Detection method: Colorimetric
- Assay type: Sandwich (quantitative)
- Reacts with: Human
Overview
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Product name
Human IL-18 ELISA Kit
See all IL-18 kits -
Detection method
Colorimetric -
Precision
Intra-assay Sample n Mean SD CV% HeLa extract 5 2.7% Inter-assay Sample n Mean SD CV% HeLa extract 3 14.2% -
Sample type
Cell culture supernatant, Urine, Serum, Cell culture extracts, Tissue Extracts, Hep Plasma, EDTA Plasma, Cit plasma -
Assay type
Sandwich (quantitative) -
Sensitivity
8.3 pg/ml -
Range
62.5 pg/ml - 4000 pg/ml -
Recovery
Sample specific recovery Sample type Average % Range Urine 88 86% - 91% Serum 84 80% - 91% Cell culture extracts 96 93% - 101% Cell culture media 96 89% - 104% Hep Plasma 93 91% - 97% EDTA Plasma 86 82% - 91% Cit plasma 82 80% - 84% -
Assay time
1h 30m -
Assay duration
One step assay -
Species reactivity
Reacts with: Human
Does not react with: Cow -
Product overview
Human IL-18 ELISA Kit (ab215539) is a single-wash 90 min sandwich ELISA designed for the quantitative measurement of IL-18 protein in cell culture extracts, cell culture supernatant, cit plasma, edta plasma, hep plasma, serum, tissue extracts, and urine. It uses our proprietary SimpleStep ELISA® technology. Quantitate Human IL-18 with 8.3 pg/ml sensitivity.
SimpleStep ELISA® technology employs capture antibodies conjugated to an affinity tag that is recognized by the monoclonal antibody used to coat our SimpleStep ELISA® plates. This approach to sandwich ELISA allows the formation of the antibody-analyte sandwich complex in a single step, significantly reducing assay time. See the SimpleStep ELISA® protocol summary in the image section for further details. Our SimpleStep ELISA® technology provides several benefits:
- Single-wash protocol reduces assay time to 90 minutes or less
- High sensitivity, specificity and reproducibility from superior antibodies
- Fully validated in biological samples
- 96-wells plate breakable into 12 x 8 wells strips
A 384-well SimpleStep ELISA® microplate (ab203359) is available to use as an alternative to the 96-well microplate provided with SimpleStep ELISA® kits.
ASSAY SPECIFICITY This kit recognizes both native and recombinant human IL-18 protein in serum, plasma, and cell culture supernatant, cell and tissue extract samples only.
CROSS REACTIVITY Recombinant IL-18BP was prepared at 50 ng/mL and 8 ng/mL and assayed for cross reactivity. No cross-reactivity was observed.
INTERFERENCE Recombinant IL-18BP was prepared at 50 ng/mL and 8 ng/mL and tested for interference. No interference with was observed.
SPECIES REACTIVITY This kit recognizes human IL-18 protein.
Other species reactivity was determined by measuring 50 % serum samples of various species, interpolating the protein concentrations from the human standard curve, and expressing the interpolated concentrations as a percentage of the protein concentration in human serum assayed at the same dilution.
Reactivity < 3% was determined for the following species: Mouse, rat and cow. -
Notes
Interleukin-18 (IL-18 or Interferon gamma-inducing factor) is a proinflammatory cytokine in the IL-1 superfamily. IL-18 has overlapping and synergistic biological function with IL-12. IL-18 is found in both intracellular and extracellular compartments. The antibodies in this kit were raised to the mature full-length sequence of human IL-18. Human IL-18 has 66% protein sequence identity to mouse Lipocalin-2.
Abcam has not and does not intend to apply for the REACH Authorisation of customers’ uses of products that contain European Authorisation list (Annex XIV) substances.
It is the responsibility of our customers to check the necessity of application of REACH Authorisation, and any other relevant authorisations, for their intended uses. -
Platform
Pre-coated microplate (12 x 8 well strips)
Properties
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Storage instructions
Store at +4°C. Please refer to protocols. -
Components 1 x 96 tests 10X Human IL-18 Capture Antibody 1 x 600µl 10X Human IL-18 Detector Antibody 1 x 600µl 10X Wash Buffer PT (ab206977) 1 x 20ml 50X Cell Extraction Enhancer Solution (ab193971) 1 x 1ml 5X Cell Extraction Buffer PTR (ab193970) 1 x 10ml Antibody Diluent CPI - HAMA Blocker (ab193969) 1 x 6ml Human IL-18 Lyophilized Recombinant Protein 2 vials Plate Seals 1 unit Sample Diluent NS (ab193972) 1 x 50ml SimpleStep Pre-Coated 96-Well Microplate (ab206978) 1 unit Stop Solution 1 x 12ml TMB Development Solution 1 x 12ml -
Research areas
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Function
Augments natural killer cell activity in spleen cells and stimulates interferon gamma production in T-helper type I cells. -
Sequence similarities
Belongs to the IL-1 family. -
Cellular localization
Secreted. - Information by UniProt
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Alternative names
- Iboctadekin
- IFN gamma inducing factor
- IFN-gamma-inducing factor
see all -
Database links
- Entrez Gene: 3606 Human
- Omim: 600953 Human
- SwissProt: Q14116 Human
- Unigene: 83077 Human
Associated products
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ELISA kits
Images
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Other - Human IL-18 ELISA Kit (ab215539)
SimpleStep ELISA technology allows the formation of the antibody-antigen complex in one single step, reducing assay time to 90 minutes. Add samples or standards and antibody mix to wells all at once, incubate, wash, and add your final substrate. See protocol for a detailed step-by-step guide.
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Example of human IL-18 standard curve in Sample Diluent NS.Background-subtracted data values (mean +/- SD) are graphed.
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Example of human IL-18 standard curve in Sample Diluent NS.Example of human IL-18 standard curve in Sample Diluent NS. The IL-18 standard curve was prepared as described. Raw data values are shown in the table. Background-subtracted data values (mean +/- SD) are graphed.
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Example of human IL-18 standard curve in 1X Cell Extraction Buffer PTR.Background-subtracted data values (mean +/- SD) are graphed.
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Example of human IL-18 standard curve in 1X Cell Extraction Buffer PTR.Example of human IL-18 standard curve in 1X Cell Extraction Buffer PTR. The IL-18 standard curve was prepared as described. Raw data values are shown in the table. Background-subtracted data values (mean +/- SD) are graphed.
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Interpolated concentrations of native IL-18 in human HeLa, HL-60, and A431 Cell Extract samples based on a 800 µg/ml extract load.The concentrations of IL-18 were measured in duplicate and interpolated from the IL-18 standard curve and corrected for sample dilution. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean IL-18 concentration was determined to be 1,099 pg/ml in HeLa cell extract, 456 pg/ml in HL-60 cell extract and 567 pg/ml in A431 cell extract.
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Interpolated concentrations of spike IL-18 in human serum and plasma samples.The concentrations of IL-18 were measured in duplicates, interpolated from the IL-18 standard curves and corrected for sample dilution. Undiluted samples are as follows: serum 50%, plasma (citrate) 50%, plasma (EDTA), and plasma (heparin) 50%. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean IL-18 concentration was determined to be 3,681 pg/mL in serum, 3,692 pg/mL in plasma (citrate), 6,941pg/mL in plasma (EDTA) and 4,057 pg/mL in plasma (heparin).
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Serum from nine individual healthy human female donors was measured in duplicate.Interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean IL-18 concentration was determined to be 423 pg/mL with a range of undetectable – 2,852 pg/mL.
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Interpolated concentrations of spike IL-18 in cell culture media and human urine samples.The concentrations of IL-18 were measured in duplicates, interpolated from the IL-18 standard curves and corrected for sample dilution. Undiluted samples are as follows: cell culture media 50% and urine 12.5%. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean IL-18 concentration was determined to be 3,079 pg/mL in cell culture media and 4,119 pg/mL in urine.
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Linearity of dilution.Linearity of dilution is determined based on interpolated values from the standard curve. Linearity of dilution defines a sample concentration interval in which interpolated target concentrations are directly proportional to sample dilution.
Native IL-18 was measured in the following biological samples in a 2-fold dilution series. Sample dilutions are made in 1X Cell Extraction Buffer PTR.
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Linearity of dilution.Recombinant IL-18 was spiked into the following biological samples and diluted in a 2-fold dilution series in Sample Diluent NS.
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Assay sensitivity.The MDD was determined by calculating the mean of zero standard replicates and adding 2 standard deviations then extrapolating the corresponding concentration.
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Sandwich ELISA - Human IL-18 ELISA Kit (ab215539)To learn more about the advantages of recombinant antibodies see here.
References (4)
ab215539 has been referenced in 4 publications.
- Ma C et al. LncRNA GAS5 overexpression downregulates IL-18 and induces the apoptosis of fibroblast-like synoviocytes. Clin Rheumatol N/A:N/A (2019). PubMed: 31372853
- Zhong F et al. miR-145 eliminates lipopolysaccharides-induced inflammatory injury in human fibroblast-like synoviocyte MH7A cells. J Cell Biochem 119:10059-10066 (2018). PubMed: 30191608
- Song E et al. Targeted proteomic assays for quantitation of proteins identified by proteogenomic analysis of ovarian cancer. Sci Data 4:170091 (2017). PubMed: 28722704
- Wu J et al. Urinary RBP and NGAL Levels are Associated with Nephropathy in Patients with Type 2 Diabetes. Cell Physiol Biochem 42:594-602 (2017). PubMed: 28954270
