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Beschreibung

CX3CR1 is a GPCR expressed on natural killer cells, cytotoxic T lymphocytes, and macrophages. The sole ligand for CX3CR1, fractalkine, is an unusual chemokine that is expressed as a transmembrane molecule with a CX3C domain and a mucin domain (Imai et al., 1997). Fractalkine is highly expressed on endothelial cells activated by TNFa and other proinflammatory cytokines, and fractalkine/CX3CR1 interactions mediate recruitment of macrophages into the atherosclerotic plaque (Lesnick et al., 2003, McDermott et al., 2003). In addition, fractalkine and CX3CR1 have been implicated in the pathogenesis of glomerulonephritis, HIV infection and rheumatoid arthritis (Ito et al., 2002, Faure et al., 2003, Nanki et al., 2002). Chemicon's CX3CR1 membrane preparations are crude membrane preparations made from our proprietary stable recombinant cell lines to ensure high-level of GPCR surface expression, thus, they are ideal HTS tools for screening of antagonists of fractalkine/CX3CR1 interactions. The membrane preparations exhibit a Kd of 0.05 nM for [125I]-fractalkine. With 2.5 mg/well CX3CR1 Membrane Prep and 0.05 nM [125I]-fractalkine, a greater than 7-fold signal-to-background ratio is obtained., Full-length Human CX3CR1