Affiliation:
1. From The Rockefeller University, New York, NY, and the Toronto General Research Institute (M.I.C.), University of Toronto, Toronto, Ontario, Canada.
Abstract
Vascular cell adhesion molecule-1 (VCAM-1/
Vcam1
) is a cytokine-inducible member of the immunoglobulin gene superfamily that is expressed by arterial endothelial cells in regions predisposed to atherosclerosis and at borders of atherosclerotic plaques. To determine whether VCAM-1 expression regulates atherosclerotic lesion formation, we crossed
Vcam1
domain 4–deficient (D4D) mice, which partially circumvent the embryonic lethality of
Vcam1
null mice, with apolipoprotein E null (
Apoe
−/−
) mice, which spontaneously develop hypercholesterolemia and atherosclerosis. In the
Apoe
−/−
background, mice homozygous for the
Vcam1
D4D allele had markedly reduced arterial VCAM-1 expression, monocyte adherence in the aortic root, and fatty streak formation. Heterozygous
Vcam1
D4D mice revealed a
Vcam1
gene-dosage effect and had intermediate, yet significant, reductions in these parameters. Our data demonstrate that VCAM-1 plays a pivotal role in the initiation of atherosclerosis in
Apoe
−/−
mice.
Publisher
Ovid Technologies (Wolters Kluwer Health)
Subject
Cardiology and Cardiovascular Medicine
Cited by
181 articles.
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