Human IL-18 enzyme-linked immunoassay kit
| Specification | 96 Test |
|---|---|
| Sensitivity | 1.38 pg/ml (50 μl)；2.13 pg/ml (10 μl) |
| Standard Curve Range | 6.86~5000 pg/ml |
| Standard Curve Gradient | 7 Points/3 Folds |
| Number of Incubations | 2 |
| Sample Volume | 50 μl/10 μl |
| Type | Ready-to-Use |
| Operation Duration | 120min |
| pg/ml | O.D. | Average | Corrected | |
|---|---|---|---|---|
| 0.00 | 0.0206 | 0.0201 | 0.0204 | |
| 6.86 | 0.0285 | 0.0286 | 0.0286 | 0.0286 |
| 20.58 | 0.0427 | 0.0437 | 0.0432 | 0.0432 |
| 61.73 | 0.0799 | 0.0812 | 0.0806 | 0.0806 |
| 185.19 | 0.1873 | 0.1930 | 0.1902 | 0.1902 |
| 555.56 | 0.4829 | 0.4890 | 0.4860 | 0.4860 |
| 1666.67 | 1.2150 | 1.2240 | 1.2195 | 1.2195 |
| 5000.00 | 3.0220 | 3.1240 | 3.0730 | 3.0730 |
Precision
| Intra-assay Precision | Inter-assay Precision | |||||
| Sample Number | S1 | S2 | S3 | S1 | S2 | S3 |
| 22 | 22 | 22 | 6 | 6 | 6 | |
| Average(pg/ml) | 1439.9 | 447.6 | 84.6 | 1253.3 | 395.7 | 75.1 |
| Standard Deviation | 34.8 | 13.9 | 4.1 | 105.2 | 22.9 | 5.2 |
| Coefficient of Variation(%) | 2.4 | 3.1 | 4.8 | 8.7 | 6.6 | 6.1 |
Intra-assay Precision (Precision within an assay) Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision.
Inter-assay Precision (Precision between assays) Three samples of known concentration were tested six times on one plate to assess intra-assay precision.
Spike Recovery
The spike recovery was evaluated by spiking 3 levels of human IL-18 into health human serum sample. The un-spiked serum was used as blank in this experiment.
The recovery ranged from 97% to 130% with an overall mean recovery of 109%.
Sample Values
| Sample Matrix | Sample Evaluated | Range (ng/ml) | Detectable (%) | Mean of Detectable (ng/ml) |
|---|---|---|---|---|
| Serum | 30 | 2.04-14.77 | 100 | 9.97 |
Serum/Plasma – Thirty samples from apparently healthy volunteers were evaluated for the presence of IL-18 in this assay. No medical histories were available for the donors.
Product Data Sheet
Background: IL-18
Interleukin 18 (IL-18), also known as interferon-gamma-inducing factor (IGIF) and IL-1 gamma, is a cytokine which shares biologic activities with IL-12 and structural similarities with the IL-1 family of proteins. IL-18 was originally cloned from liver cells and has since been shown to be expressed by monocyte/macrophages, osteoblasts and keratinocytes. Caspase-1 (IL-1 beta-converting enzyme) has been implicated in the physiological processing of pro-IL-18 to IL-18. Similarly to IL-12, human IL-18 has been shown to enhance NK cell activity in PBMC cultures. Human IL-18 has also been found to induce the production IFN-gamma and GM-CSF while inhibiting the production of IL-10 by PBMC. On enriched human T cells, human IL-18 can enhance Th1 cytokine production and stimulate cell proliferation via an IL-2-dependent pathway. In the mouse system, IL-18 has been shown to be a costimulatory factor for the activation of Th1, but not Th2, cells. IL-18 was found to selectively enhance the FasL-mediated cytotoxicity of Th1, but not Th0 or Th2, cells. IL-18 has also been shown to induce activated B cells to produce IFN-gamma that inhibits IgE production.
