Regulation of CX3CL1/fractalkine expression in endothelial cells
- PMID: 15067194
- DOI: 10.5551/jat.11.15
Regulation of CX3CL1/fractalkine expression in endothelial cells
Abstract
CX3CL1/fractalkine is a chemokine with a unique CX3C motif. Fractalkine is synthesized in endothelial cells as a membrane protein, and the N-terminal domain containing a CX3C motif is cleaved and secreted. CX3CR1, the specific receptor for fractalkine, is expressed in monocytes and lymphocytes. Membrane-bound fractalkine works as an adhesion molecule for these leukocytes and the secreted form as a chemotactic factor. Fractalkine is produced by endothelial cells stimulated with tumor necrosis factor-alpha, interleukin-1 (IL-1), lipopolysaccharide and interferon-gamma. Expression of fractalkine in endothelial cells is inhibited by the soluble form of IL-6 receptor-alpha, 15-deoxy-Delta(12,14)-prostaglandin J(2), and hypoxia. The expression of fractalkine is tightly regulated and fractalkine plays an important role in the interaction between leukocytes and endothelial cells.
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