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Cytokine regulation of MCP-1 expression in brain and retinal microvascular endothelial cells.

Authors: Harkness, KA  Sussman, JD  Davies-Jones, GA  Greenwood, J  Woodroofe, MN 
Citation: Harkness KA, etal., J Neuroimmunol. 2003 Sep;142(1-2):1-9.
Pubmed: (View Article at PubMed) PMID:14512159

Chemokines have a pivotal role in the selective mediation and amplification of inflammation. The CNS vascular endothelial cells, which form part of the blood-brain barrier (BBB) and blood-retinal barrier (BRB), are ideally situated to present chemokines to circulating lymphocytes leading to their recruitment. Monocyte-chemoattractant protein-1 (MCP-1), also known as CCL2, a potent chemoattractant of T cells and monocytes, has been implicated in inflammatory and angio-proliferative brain and retinal disease. In this study, MCP-1 expression by CNS endothelial cells was investigated in vitro. Rat brain (GP8/3.9) and retinal (JG2/1) vascular endothelial cell lines expressed MCP-1 constitutively in vitro as assessed by immunocytochemistry and enzyme linked immunosorbant assay (ELISA). Upregulation of secreted MCP-1 was observed following activation with the pro-inflammatory cytokines TNF-alpha, IL-1 beta and IFN-gamma, and was reduced following dexamethasone treatment. Functional chemotactic activity of brain and retinal endothelial cell supernatants was demonstrated in an in vitro chemotaxis assay, which was inhibited by anti-MCP-1 antibodies. These findings suggest that endothelial cell-derived MCP-1 plays a key role in leukocyte recruitment across the blood-brain and blood-retinal barriers in vivo.

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CRRD Object Information
CRRD ID: 8548859
Created: 2014-03-24
Species: All species
Last Modified: 2014-03-24
Status: ACTIVE



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