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We sought to determine the relative importance of aging and hypercholesterolemia on atherosclerosis. Although plasma cholesterol levels increased similarly in young and old rabbits fed an atherogenic diet for 2 months, aortic atherosclerotic lesions were more prominent in young animals. This finding was associated with an age-dependent reduction in the DNA-binding activity of the proinflammatory nuclear...
The endothelium synthesizes and releases several vasodilating factors, including nitric oxide, endothelium-derived hyperpolarizing factor, and prostacyclin. Under certain conditions, it also liberates vasocontracting factors. Thus, the endothelium plays an important role in regulating vascular homeostasis. Several intracellular mechanisms are involved in the synthesis of nitric oxide, including receptor-coupled...
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