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Cell Metab. 2008 Nov;8(5):372-83. doi: 10.1016/j.cmet.2008.08.016.

Endothelial cell-specific NF-kappaB inhibition protects mice from atherosclerosis.

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1
Institute of Genetics, Centre for Molecular Medicine (CMMC), Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Z├╝lpicher Str. 47, 50674 Cologne, Germany.

Abstract

Atherosclerosis is a progressive disorder of the arterial wall and the underlying cause of cardiovascular diseases such as heart attack and stroke. Today, atherosclerosis is recognized as a complex disease with a strong inflammatory component. The nuclear factor-kappaB (NF-kappaB) signaling pathway regulates inflammatory responses and has been implicated in atherosclerosis. Here, we addressed the function of NF-kappaB signaling in vascular endothelial cells in the pathogenesis of atherosclerosis in vivo. Endothelium-restricted inhibition of NF-kappaB activation, achieved by ablation of NEMO/IKKgamma or expression of dominant-negative IkappaBalpha specifically in endothelial cells, resulted in strongly reduced atherosclerotic plaque formation in ApoE(-/-) mice fed with a cholesterol-rich diet. Inhibition of NF-kappaB abrogated adhesion molecule induction in endothelial cells, impaired macrophage recruitment to atherosclerotic plaques, and reduced expression of cytokines and chemokines in the aorta. Thus, endothelial NF-kappaB signaling orchestrates proinflammatory gene expression at the arterial wall and promotes the pathogenesis of atherosclerosis.

PMID:
19046569
DOI:
10.1016/j.cmet.2008.08.016
[Indexed for MEDLINE]
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