| Field | Specification |
|---|---|
| Target | |
| Alternative names | Interleukin-8;IL-8;C-X-C motif chemokine 8;Chemokine (C-X-C motif) ligand 8;Emoctakin;Granulocyte chemotactic protein 1;GCP-1;Monocyte-derived neutrophil chemotactic factor;MDNCF;Monocyte-derived neutrophil-activating peptide;MONAP;Neutrophil-activating protein 1;NAP-1;Protein 3-10C;T-cell chemotactic factor;MDNCF-a;GCP/IL-8 protein IV;IL8/NAP1 form I;Interleukin-8; (Ala-IL-8)77;GCP/IL-8 protein II;IL-8 (1-77);IL8/NAP1 form II;MDNCF-b;IL-8 (5-77);IL-8 (6-77); (Ser-IL-8)72;GCP/IL-8 protein I;IL8/NAP1 form III;Lymphocyte-derived neutrophil-activating factor;LYNAP;MDNCF-c;Neutrophil-activating factor;NAF;IL-8 (7-77);GCP/IL-8 protein V;IL8/NAP1 form IV;IL-8 (8-77);GCP/IL-8 protein VI;IL8/NAP1 form V;IL-8 (9-77);GCP/IL-8 protein III;IL8/NAP1 form VI;CXCL8;IL8; |
| Gene ID | |
| UniProt # | |
| Reactivity | |
| Applications | |
| Immunogen | Expression system for standard: E.coli; Immunogen sequence: S28-S99 |
| Expression system | |
| Expression region | |
| Assay type | |
| Sample type(s) | Cell Culture Supernatant, Serum, Plasma |
| Sensitivity | |
| Detection range | |
| Assay time | |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Assay Principle
This single-incubation sandwich ELISA quantifies human interleukin-8 (gene CXCL8) in cell culture supernatants, serum and plasma (heparin, EDTA, citrate). The strips are coated with an anti-tag antibody. Samples and standards are added to the wells together with the kit’s antibody cocktail (Antibody A and Antibody B); the resulting antibody–target complex is held on the plate through the tag. After washing, TMB substrate is added and the HRP label on the detection antibody converts it to a colored product in proportion to the bound target. The reaction is stopped and the plate is read at 450 nm. The supplier markets the Quick format as a 90-minute assay.
Interleukin-8 (IL-8, CXCL8) is a CXC chemokine released by macrophages, epithelial and endothelial cells in response to inflammatory signals. Through the receptors CXCR1 and CXCR2 it attracts and activates neutrophils and supports angiogenesis. IL-8 is one of the most commonly measured inflammatory cytokines in infection, inflammation and cancer research. Rodents lack a direct ortholog.
Kit Components
| Anti-tag Pre-coated 96-well Strip Microplate | 12 strips of 8 wells |
|---|---|
| Human CXCL8 Standard | 2 × 10 ng/tube |
| Human CXCL8 Antibody A | 3 mL |
| Human CXCL8 Antibody B | 3 mL |
| Sample Diluent | 15 mL |
| TBS-T Wash Buffer (25x) | 12 mL |
| Color Developing Reagent (TMB) | 10 mL |
| Stop Solution | 10 mL |
| Adhesive Plate Sealers | 2 |
Also required (not supplied): microplate reader for 450 nm; automated plate washer (optional); precision pipettes for 0.5 µL through 1 mL volumes of aqueous solutions; multichannel pipettes (recommended for many samples); deionized or distilled water; 500 mL graduated cylinders; test tubes for dilution; horizontal orbital microplate shaker capable of maintaining a speed of 500 rpm, amplitude 3 mm.
Performance Data
| Species | Human |
|---|---|
| Sample types | Cell culture supernatants, serum and plasma (heparin, EDTA, citrate) |
| Assay range | 15.6 pg/mL–1,000 pg/mL |
| Sensitivity | <1 pg/mL |
| Standard | Recombinant human CXCL8 (Ser28–Ser99), expressed in E. coli |
| Cross-reactivity | None detected against related proteins in supplier testing |
Storage & Handling
Store at 4 °C for up to 6 months. Ships on gel ice and tolerates up to 3 days at room temperature; refrigerate on arrival.
Safety
Sample data
| Concentration (pg/ml) | 0 | 15.6 | 31.2 | 62.5 | 125 | 250 | 500 | 1000 |
| O.D. | 0.000 | 0.082 | 0.149 | 0.281 | 0.556 | 0.936 | 1.594 | 2.071 |
Intra/inter assay consistency
| Intra-Assay Precision | Inter-Assay Precision | |||||
|---|---|---|---|---|---|---|
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 16 | 16 | 16 | 24 | 24 | 24 |
| Mean (pg/ml) | 16 | 66 | 234 | 16 | 63 | 230 |
| Standard deviation | 0.72 | 2.83 | 14.27 | 0.8 | 3.84 | 17.48 |
| CV (%) | 4.5% | 4.3% | 6.1% | 5% | 6.1% | 7.6% |
Kit components
Description|Quantity|Volume Anti-tag Pre-coated 96-well Strip Microplate|1|12 strips of 8 wells Standard||2 Antibody A|1|3ml Antibody B|1|3ml Sample Diluent|1|15ml TBS-T Wash Buffer (25x)|1|12ml Color Developing Reagent (TMB)|1|10ml Stop Solution|1|10ml Adhesive Plate Sealers|2|PieceMaterials required but not provided
- Microplate Reader capable of reading absorbance at 450nm.
- Automated plate washer (optional)
- Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions.
- Multichannel pipettes are recommended for large amount of samples.
- Deionized or distilled water.
- 500ml graduated cylinders.
- Test tubes for dilution.
- Horizontal orbital microplate shaker capable of maintaining a speed of 500 rpm, amplitude 3mm.
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