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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

G protein- coupled signal transduction pathways for interleukin-8.

Interleukin-8 (IL-8) is one of the major mediators of the inflammatory response. The pathways by which IL-8 activates inositide-specific phospholipase C (PLC) were investigated by co-expression of different components of the guanosine triphosphate binding protein (G protein) pathway in COS-7 cells. Two distinct IL-8 receptors reconstituted ligand-dependent activation of endogenous PLC when transfected together with the G protein alpha subunits G alpha 14, G alpha 15, or G alpha 16. However, reconstitution was not observed with cells that overexpressed G alpha q or G alpha 11. Furthermore, IL-8 receptors interacted with endogenous pertussis toxin-sensitive G proteins or with the recombinant G protein Gi to release free beta gamma subunits that could then specifically activate the beta 2 isoform of PLC. These findings suggest that IL-8 acts through signal-transducing pathways that are limited to specific heterotrimeric G proteins and effectors. These may provide suitable targets for the development of anti-inflammatory agents.[1]


  1. G protein-coupled signal transduction pathways for interleukin-8. Wu, D., LaRosa, G.J., Simon, M.I. Science (1993) [Pubmed]
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