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.
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; GCP-1; GCP1; IL8; LECT; LUCT; LYNAP; MDNCF; MONAP; NAF; NAP-1; NAP1
UniProt ID: (Human) P10145
Entrez Gene ID: (Human) 3576
Molecular Function: chemokine