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Product Summary
The Quantikine HS Human IL-1 beta Immunoassay is a 4 hour solid phase ELISA designed to measure human IL-1 beta levels in serum, plasma, and saliva. It contains E. coli-expressed recombinant human IL-1 beta and antibodies raised against the recombinant factor and has been shown to accurately quantitate recombinant human IL-1 beta. Results obtained using natural IL-1 beta showed linear curves that were parallel to the standard curves obtained using the Quantikine HS kit standards. These results indicate that the Quantikine HS Immunoassay kit can be used to determine relative mass values for natural human IL-1 beta. Reports indicate that ELISA kits calibrated using mature IL-1 beta as a standard will detect, but considerably underestimate, the unprocessed IL-1 beta precursor present in samples. In biological samples other than cell lysates, the precursor form of IL-1 beta is usually not the predominant form of IL-1 beta present and, additionally, is not biologically active. Therefore, results obtained using this kit should provide a useful measure of the levels of active IL-1 beta present in serum, plasma, and saliva.
Precision
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 in twenty separate assays to assess inter-assay precision. Assays were performed by at least three technicians using two lots of components
Serum, EDTA Plasma, Heparin Plasma, Saliva
| Intra-Assay Precision | Inter-Assay Precision | |||||
|---|---|---|---|---|---|---|
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 20 | 20 | 20 | 20 | 20 | 20 |
| Mean (pg/mL) | 0.315 | 1.3 | 2.52 | 0.27 | 1.36 | 2.6 |
| Standard Deviation | 0.014 | 0.05 | 0.06 | 0.029 | 0.101 | 0.163 |
| CV% | 4.4 | 3.9 | 2.4 | 10.7 | 7.4 | 6.3 |
Recovery
The recovery of human IL-1 beta spiked to levels throughout the range of the assay in various matrices was evaluated.
| Sample Type | Average % Recovery | Range % |
|---|---|---|
| EDTA Plasma (n=4) | 94 | 87-106 |
| Heparin Plasma (n=4) | 92 | 89-99 |
| Serum (n=4) | 91 | 86-101 |
Linearity
To assess the linearity of the assay, samples containing and/or spiked with high concentrations of human IL-1 beta were serially diluted with calibrator diluent to produce samples with values within the dynamic range of the assay.
Scientific Data
Human IL-1 beta/IL-1F2 Quantikine HS ELISA Kit Summary
Assay Length
4.0 hours
Sample Type & Volume Required Per Well
Serum (100 uL), EDTA Plasma (100 uL), Heparin Plasma (100 uL), Saliva (10 uL)
Sensitivity
0.063 pg/mL
Assay Range
0.1 - 8 pg/mL (Serum, EDTA Plasma, Heparin Plasma, Saliva)
Specificity
Natural and recombinant human IL-1 beta. This assay also recognizes recombinant rhesus macaque IL-1 beta (aa 117-269).
Cross-reactivity
Cross-reactivity observed with 1 or more available related molecules.< 50% cross-species reactivity observed with species tested.
Interference
No significant interference observed with available related molecules.
背景
别名
catabolin,IL1 beta,IL-1 beta,IL-1,IL1B,IL-1b,IL1-BETA,IL-1F2,IL1F2IL-1 beta,interleukin 1, beta,interleukin-1 beta,preinterleukin 1 beta,pro-interleukin-1-beta,Interleukin 1 beta
背景
Background: IL-1 beta/IL-1F2
The Interleukin 1 (IL-1) family of proteins consists of the classic members IL-1 alpha, IL-1 beta, and IL-1ra, plus IL-18, IL-33 and IL-1F5-F10. IL-1 alpha and IL-1 beta bind to the same cell surface receptors and share biological functions. IL-1 is not produced by unstimulated cells of healthy individuals with the exception of skin keratinocytes, some epithelial cells, and certain cells of the central nervous system. However, in response to inflammatory agents, infections, or microbial endotoxins, a dramatic increase in the production of IL-1 by macrophages and various other cell types is observed. IL-1 beta plays a central role in immune and inflammatory responses, bone remodeling, fever, carbohydrate metabolism, and GH/IGF-I physiology. Inappropriate or prolonged production of IL-1 has been implicated in a variety of pathological conditions including sepsis, rheumatoid arthritis, inflammatory bowel disease, acute and chronic myelogenous leukemia, insulin dependent diabetes mellitus, atherosclerosis, neuronal injury, and aging-related diseases.
IL-1 alpha and IL-1 beta are structurally related polypeptides that show approximately 25% homology at the amino acid level. Both are synthesized as 31 kDa precursors that are subsequently cleaved into mature proteins of approximately 17.5 kDa. Cleavage of the IL-1 beta precursor by Caspase-1/ICE is a key step in the inflammatory response. Neither IL-1 alpha nor IL-1 beta contains a typical hydrophobic signal peptide, but evidence suggests that these factors can be secreted by non-classical pathways. A portion of unprocessed IL-1 alpha can be presented on the cell membrane and may retain biological activity. The precursor form of IL-1 beta, unlike the IL-1 alpha precursor, shows little or no biological activity in comparison to the processed form. Both unprocessed and mature forms of IL-1 beta are exported from the cell.
IL-1 alpha and IL-1 beta exert their effects through immunoglobulin superfamily receptors that additionally bind IL-1ra. The 80 kDa transmembrane type I receptor (IL-1 RI) is expressed on T cells, fibroblasts, keratinocytes, endothelial cells, synovial lining cells, chondrocytes, and hepatocytes. The 68 kDa transmembrane type II receptor (IL-1 RII) is expressed on B cells, neutrophils, and bone marrow cells. The two IL-1 receptor types show approximately 28% homology in their extracellular domains but differ significantly in that the type II receptor has a cytoplasmic domain of only 29 amino acids (aa), whereas the type I receptor has a 213 aa cytoplasmic domain. IL-1 RII does not appear to signal in response to IL-1 and may function as a decoy receptor that attenuates IL-1 function. The IL-1 receptor accessory protein (IL-1 RAcP) associates with IL-1 RI and is required for IL-1 RI signal transduction. IL-1ra is a secreted molecule that functions as a competitive inhibitor of IL-1. Soluble forms of both IL-1 RI and IL-1 RII have been detected in human plasma, synovial fluids, and the conditioned media of several human cell lines. In addition, IL-1 binding proteins that resemble soluble IL-1 RII are encoded by vaccinia and cowpox viruses.
Long Name:
Interleukin 1 beta
Entrez Gene IDs:
3553 (Human); 16176 (Mouse); 24494 (Rat); 397122 (Porcine); 403974 (Canine); 100034237 (Equine); 100135556 (Guinea Pig)
Alternate Names:
catabolin; IL1 beta; IL-1 beta; IL-1; IL1B; IL-1b; IL1-BETA; IL-1F2; IL1F2IL-1 beta; interleukin 1, beta; interleukin-1 beta; preinterleukin 1 beta; pro-interleukin-1-beta
研究领域
制备和贮存
保存方式
Preparation and Storage
Shipping
The product is shipped with polar packs. 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.
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