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Description: Human IL-8, also called neutrophil attractant/activating protein (NAP-1), monocyte derived neutrophil activating peptide (MONAP), monocyte derived neutrophil activating factor (ANF), monocyte derived neutrophil chemotactic factor (MDNCF), and neutophil activating factor (NAF), is a ~6-8 kDa factor produced by variety types of cells including monocytes, lymphocytes, granulocytes, fibroblasts and endothelial cells. IL-8 is an inflammatory cytokine which functions as a neutrophil chemoatractant and activating factor. It also attracts basophils and a subpopulation of lymphocytes.
Applications Reported: Recombinant human IL-8 is biologically active.
Applications Tested: This recombinant human IL-8 has been tested in bioassays for chemoattractant activity, with maximal activity between 10-100 ng/mL.
Source: E. coli expressed amino acids Ser 28-Ser 99 of human IL-8 accession # NM_000584.
Bioactivity: Measured by chemotaxis assay of human peripheral blood neutrophils. Maximal chemoattractant activity was observed between 10-100 ng/mL.
Endotoxin: Less than 0.01 ng/ug cytokine as determined by the LAL assay. Purity: >98% as determined by SDS-PAGE.
Molecular Weight: The protein is not methionylated at the N-terminal and has a predicted molecular mass of 8,386. The DTT reduced protein migrates as an 8 kDa polypeptide and the non-reduced polypeptide migrates as a 9 kDa polypeptide on SDS-PAGE.
Storage and handling: For best recovery, quick-spin vial prior to opening. Use in a sterile environment.
Purity: Greater than 90%, as determined by SDS-PAGE.
Aggregation: Less than 10%, as determined by HPLC.
Filtration: 0.2 µm post-manufacturing filtered.
Interleukin 8 (IL-8, CXCL8) is a 72 amino acid pro-inflammatory factor which belongs to the CXC subfamily of chemokines, and are bound by the cell surface receptors IL-8RA and IL-8RB. IL-8 functions as a chemoattractant and potent angiogenic factor. The expression and secretion of IL-8 can be induced by diverse inflammatory stimuli in many cells, including macrophages and endothelial cells. In endothelial cells, IL-8 is present in storage vesicles called Weibel-Palade bodies. IL-8, first isolated from osteosarcoma cells, contains the ELR-motif (N-terminal Glu-Leu-Arg amino acid sequence) and signals through the CXCR1 and CXCR2 receptors. Previous nomenclature for IL-8 includes neutrophil activating protein 1 (NAP-1), granulocyte chemotactic protein 1 (GCP-1), monocyte-derived neutrophil-activating peptide (MONAP) and protein 3-10C. IL-8 and ten other members of the CXC chemokine gene family form a chemokine gene cluster in a region mapped to chromosome 4q. Cancer studies have demonstrated a role for IL-8 in the angiogenesis and growth of tumours, and IL-8 is believed to play a role in the pathogenesis of bronchiolitis, a common respiratory tract disease caused by viral infection.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: (Ala-IL-8)77; (Ser-IL-8)72; alveolar macrophage chemotactic factor I; ANX7; beta endothelial cell-derived neutrophil activating peptide; beta-thromboglobulin-like protein; C-X-C motif chemokine 8; Chemokine (C-X-C motif) ligand 8; Emoctakin; GCP-1; GCP/IL-8 protein I; GCP/IL-8 protein II; GCP/IL-8 protein III; GCP/IL-8 protein IV; GCP/IL-8 protein V; GCP/IL-8 protein VI; Granulocyte chemotactic protein 1; IL-8; IL-8(1-77); IL-8(5-77); IL-8(6-77); IL-8(7-77); IL-8(8-77); IL-8(9-77); IL8/NAP1 form I; IL8/NAP1 form II; IL8/NAP1 form III; IL8/NAP1 form IV; IL8/NAP1 form V; IL8/NAP1 form VI; ILN; Interleukin; interleukin 8; Interleukin-8; Interleukin8; lung giant cell carcinoma-derived chemotactic protein; lymphocyte derived neutrophil activating peptide; Lymphocyte-derived neutrophil-activating factor; LYNAP; MDNCF; MDNCF-a; MDNCF-b; MDNCF-c; MONAP; Monocyte-derived neutrophil chemotactic factor; Monocyte-derived neutrophil-activating peptide; NAF; NAP-1; Neutrophil-activating factor; neutrophil-activating peptide 1; Neutrophil-activating protein 1; Protein 3-10C; RP11-537A6.8; small inducible cytokine subfamily B, member 8; SNX; SYNEXIN; T-cell chemotactic factor; tumor necrosis factor-induced gene 1
Gene Aliases: CXCL8; IL8
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