Vascular Biology |
From the Division of Biomedical Sciences (N.W., L.V., Y.Z., M.B.S.), University of California, Riverside; Chiron Corp (S.H.), Emerville; and Elan Pharmaceuticals (J.F.), Menlo Park, Calif.
Correspondence to M.B. Stemerman, MD, Division of Biomedical Sciences, University of California, Riverside, CA 92521. E-mail michael.stemerman{at}ucr.edu
AbstractAs distal targets and mediators of signal
transduction pathways, activator protein-1 (AP-1), c-Jun,
and c-Fos are among the primary regulators of genes involved in cell
function, proliferation, and differentiation. By using
adenovirus-mediated gene transfer, we show that overexpression of AP-1
proteins directly causes coinduction of gene expression of an adhesion
molecule, intercellular adhesion molecule-1 (ICAM-1), and a chemokine,
monocyte chemoattractant protein-1 (MCP-1), in human vascular
endothelial cells (ECs). The AP-1induced gene
expression occurs through a mechanism independent of nuclear
factor-
B. Because the induced expression of ICAM-1 and MCP-1 in ECs
has been implicated in endothelial activation and a
number of important vascular disorders, it is suggested that AP-1
activation may play an important role in the pathogeneses of
inflammation, angiogenesis, and
atherogenesis.
Key Words: endothelial activation AP-1 adenovirus adhesion molecules chemokines
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