Site Specificity of Atherosclerosis

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Abstract
Atherosclerosis is a complex disease process that affects very specific sites of the vasculature. It is recognized that hemodynamic forces are largely responsible for dictating which vascular sites are either susceptible or resistant to developing atherosclerosis. In addition, a number of systemic and local factors also modulate the pathogenesis of the disease. By studying the development of atherosclerosis in mice, investigators have gained insights into the molecular mechanisms of this disease, although studies have largely focused on a single vascular site. Here, we review those recent studies in which vascular site-specific effects on atherosclerosis were reported when more than 1 site was examined. We assess the hypothesis that regional differences in the hemodynamic profile prime the endothelial phenotype to respond distinctly to such systemic risk factors as hypercholesterolemia, genetics, immune status, gender, and oxidative stress. Because a given treatment may differentially affect the development of atherosclerotic lesions throughout the vasculature, the sites chosen for study are critically important. By accounting for the complex interplay of factors that may operate at these different sites, a more complete understanding of the overriding mechanisms that control the initiation and progression of the atherosclerotic lesion may be realized.

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