CXCR2 ligands CXCR2:CXCR2 ligands Receptor CXCR2 binds ligands CXCL1 to 7 Authored: Jassal, B, 2008-08-21 14:07:16 CXCR2 (High affinity interleukin-8 receptor B) (Murphy PM and Tiffany HL, 1991) is closely related to CXCR1 and binding of IL-8 to the receptor causes activation of neutrophils. Other ELR-positive chemokines (CXCL1 to CXCL7) can also bind with CXCR2 to cause various effects as described below.<br>CXCL1 (previously known as GRO1 oncogene; NAP-3; MSGA-alpha) (Richmond A et al, 1988) is expressed by neutrophils, macrophages and epithelial cells and possesses neutrophil chemoattractant activity. It is secreted by melanoma cells and is implicated in melanoma pathogenesis. CXCL2 (MIP2-alpha;Gro-beta;Gro-2) (Iida N and Grotendorst GR, 1990; Haskill S et al, 1990) is closely related to CXCL1 (90% amino acid sequence). It is secreted by monocytes and macrophages and attracts polymorphonuclear leukocytes and hematopoietic stem cells. CXCL3 (GRO3; GROg; MIP2-beta) (Haskill S et al, 1990) controls the migration and adhesion of monocytes.<br>CXCL4 (platelet factor 4, PF4) (Poncz M et al, 1987) is released from platelets during aggregation and promotes blood coagulation by neutralization of heparin-like molecules. It is chemotactic for neutrophils, fibroblasts and monocytes. Due to all these roles, CXCL4 is implicated in wound repair and inflammation. CXCL5 (ENA-78) (Walz A et al, 1991) is produced by cells which have been stimulated by interleulin-1 or tumor necrosis factor-alpha. CXCL7 (pro-platelet basic protein, PPBP) (Holt JC et al, 1986) is released from platelets once they are activated. It can stimulate various processes including glucose metabolism, mitogenesis and syntheses of plasminogen activator and extracellular matrix. Edited: D'Eustachio, P, 2008-09-01 11:58:31 Pubmed1744577 Pubmed1891716 Pubmed2078213 Pubmed2217207 Pubmed2423119 Pubmed2970963 Pubmed3098319 Reactome Database ID Release 43373813 Reactome, http://www.reactome.org ReactomeREACT_14784 Reviewed: Bockaert, J, 2008-09-01 12:04:13