Interleukin 8 Protein | IL8 protein
Interleukin 8, Human (IL-8) BioAssay ELISA Kit
Interleukin 8 (IL-8), a member of the neutrophil-specific CXC subfamily of chemokines, is a potent neutrophil chemotactic and activating factor. It is a primary inflammatory cytokine produced by many cells (including monocytes/macrophages, T cells, neutrophils, fibroblasts, endothelial cells, keratinocytes, hepatocytes, astrocytes and chondrocytes) in response to proinflammatory stimuli such as IL-1, TNF, LPS and viruses. Its function is, in part, to attract neutrophils to the site of inflammation and to activate them. (For reviews, see references 1-6.)
The human IL-8 cDNA sequence predicts a protein of 99 amino acids. Removal of a 22 residue signal peptide generates a mature protein of 77 amino acids (~8kD). Further proteolysis of the N-terminal end leads to a variant form with 72 amino acids; full activation of IL-8 may require cleavage to the 72 amino acid form. IL-8 can form non-covalent dimers in solution, especially at high concentrations, but dimerization is not necessary for biological activity.
IL-8 binds to two seven-transmembrane, G protein-coupled receptors, CXCR1 and CXCR2, as well as to the non-signalling Duffy antigen on red blood cells. The Duffy antigen may play a role in regulating IL-8 activity on functional receptors. The Interleukin 8, Human (IL-8) BioAssay ELISA Kit is a 3.5 hour solid phase ELISA designed to measure human IL-8 in cell culture supernates, serum and plasma. It is based on antibodies raised against the 72 amino acid variant of human IL-8 derived from E. coli. It is calibrated with the same recombinant factor. This immunoassay accurately quantitates recombinant human IL-8. Measurement of natural human IL-8 or the 77 amino acid variant of human IL-8 gave results parallel to the standard curves obtained using the E. coli-expressed kit standards. These results indicate that the Immunoassay kit can be used to determine relative mass values for natural human IL-8.
Autoantibodies to IL-8, as well as immune complexes of IL-8 and these antibodies, have been reported in the serum of some normal subjects (7). It remains to be determined if these autoantibodies may have the potential to interfere with the measurement of serum IL-8 by ELISA.
NCBI and Uniprot Product Information
NCBI Description
The protein encoded by this gene is a member of the CXC chemokine family. This chemokine is one of the major mediators of the inflammatory response. This chemokine is secreted by several cell types. It functions as a chemoattractant, and is also a potent angiogenic factor. This gene is believed to play a role in the pathogenesis of bronchiolitis, a common respiratory tract disease caused by viral infection. This gene and other ten members of the CXC chemokine gene family form a chemokine gene cluster in a region mapped to chromosome 4q. [provided by RefSeq, Jul 2008]
Uniprot Description
IL8: IL-8 is a chemotactic factor that attracts neutrophils, basophils, and T-cells, but not monocytes. It is also involved in neutrophil activation. It is released from several cell types in response to an inflammatory stimulus. IL-8(6-77) has a 5-10-fold higher activity on neutrophil activation, IL-8(5-77) has increased activity on neutrophil activation and IL-8(7-77) has a higher affinity to receptors CXCR1 and CXCR2 as compared to IL-8(1-77), respectively. Belongs to the intercrine alpha (chemokine CxC) family. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: Secreted; Secreted, signal peptide; Cytokine; Motility/polarity/chemotaxis
Chromosomal Location of Human Ortholog: 4q13-q21
Cellular Component: extracellular space; extracellular region
Molecular Function: protein binding; chemokine activity; interleukin-8 receptor binding
Biological Process: regulation of cell adhesion; neutrophil chemotaxis; neutrophil activation; unfolded protein response; negative regulation of G-protein coupled receptor protein signaling pathway; calcium-mediated signaling; chemotaxis; signal transduction; regulation of retroviral genome replication; induction of positive chemotaxis; negative regulation of cell proliferation; G-protein coupled receptor protein signaling pathway; cellular protein metabolic process; unfolded protein response, activation of signaling protein activity; receptor internalization; response to molecule of bacterial origin; immune response; angiogenesis; cell motility; inflammatory response; cell cycle arrest; embryonic gut development
Research Articles on IL8
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Product Notes
The IL8 il8 (Catalog #AAA634705) is a Protein and is intended for research purposes only. The product is available for immediate purchase. AAA Biotech's Interleukin 8 can be used in a range of immunoassay formats including, but not limited to, ELISA (EL/EIA). Researchers should empirically determine the suitability of the IL8 il8 for an application not listed in the data sheet. Researchers commonly develop new applications and it is an integral, important part of the investigative research process. It is sometimes possible for the material contained within the vial of "Interleukin 8, Protein" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.Precautions
All products in the AAA Biotech catalog are strictly for research-use only, and are absolutely not suitable for use in any sort of medical, therapeutic, prophylactic, in-vivo, or diagnostic capacity. By purchasing a product from AAA Biotech, you are explicitly certifying that said products will be properly tested and used in line with industry standard. AAA Biotech and its authorized distribution partners reserve the right to refuse to fulfill any order if we have any indication that a purchaser may be intending to use a product outside of our accepted criteria.Disclaimer
Though we do strive to guarantee the information represented in this datasheet, AAA Biotech cannot be held responsible for any oversights or imprecisions. AAA Biotech reserves the right to adjust any aspect of this datasheet at any time and without notice. It is the responsibility of the customer to inform AAA Biotech of any product performance issues observed or experienced within 30 days of receipt of said product. To see additional details on this or any of our other policies, please see our Terms & Conditions page.Item has been added to Shopping Cart
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