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. Note: This description may include information from UniProtKB.
Protein type: Cytokine; Motility/polarity/chemotaxis; Secreted; Secreted, signal peptide
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; negative regulation of G-protein coupled receptor protein signaling pathway; unfolded protein response; 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