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- W2045517532 abstract "Chemokines and their cognate receptors have key functions in cell growth, survival, and tissue-specific homing of cells. While these functions first were identified in normal immune cells, cancer cells may co-opt chemokine receptor signaling to promote primary tumor growth and metastasis. Our knowledge of signaling by chemokines and chemokine receptors in cancer is lacking, particularly as this signaling occurs in vivo. New insights into chemokine receptor signaling in cancer are needed to understand molecular regulation of primary and metastatic disease and develop targeted therapies to improve patient survival. To meet this need, we have developed a molecular imaging reporter to investigate activation of CXCR4, a chemokine receptor that regulates tumor growth and metastasis in a variety of common cancers. The reporter system uses a firefly luciferase-based protein fragment complementation assay to detect interactions between CXCR4 and β-arrestin molecules, a common early step in chemokine receptor signaling. In cell-based assays, incubation with the chemokine ligand CXCL12 (SDF-1) produced dose-dependent increases in bioluminescence with >7-fold induction above basal levels of association between these proteins. Reporter activation could be blocked with specific inhibitors of CXCR4 signaling. These reporters enabled in vivo imaging of CXCR4 activation and inhibition in living mice. Overall, this research establishes a new imaging reporter for probing CXCR4 signaling in cancer and other diseases regulated by this chemokine receptor." @default.
- W2045517532 created "2016-06-24" @default.
- W2045517532 creator A5006512574 @default.
- W2045517532 creator A5051460873 @default.
- W2045517532 date "2008-06-06" @default.
- W2045517532 modified "2023-09-28" @default.
- W2045517532 title "Imaging CXCR4 Signaling with Firefly Luciferase Complementation" @default.
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- W2045517532 doi "https://doi.org/10.1021/ac8005457" @default.
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