BackgroundInformation | CXCR2isa7-TMG-proteincoupledreceptorthatbindstothechemokinesGROalpha,GRObeta,GROgamma,IL-8,ENA-78,NAP-2andGCP-2(OlsonandLey,2002).Neutrophils,mastcellsandmicrovascularendothelialcellsexpressCXCR2,andinteractionsofCXCR2withitsligandspromoteschemotaxisofthesecelltypes(Heidemannetal.,2003;Nilssonetal.,1999;Whiteetal.,1998).StudieswithmicelackingCXCR2indicatethatCXCR2promotesgrowthofprimarytumorsandsecondarymetastases(Keaneetal.,2004),andplaysanessentialroleinhyperoxia-inducedlunginjury(Sueetal.,2004).Inaddition,cytomegalovirusencodesaCXCR2-bindingchemokine,vCXC-1,thatpromotesneutrophilmigrationtoinfectedcells(Penfoldetal.,1999).Chemicon"sCXCR2MembranePrepsareidealtoolsforscreeningforantagoNISTsofinteractionsbetweenCXCR2anditsligands.RADIolabeledIL-8bindstotheCXCR2membraneswithaKdof0.075nM.With0.1nM125I-labeledIL-8,a5-foldwindowofspecificbindingisobtained. |