PMID: 8964183Feb 1, 1996Paper

Cellular mechanisms in the development of atherosclerosis

Diabetes Research and Clinical Practice
M E Rosenfeld

Abstract

Morphologic and immunocytochemical studies of hypercholesterolemic animal models have now clearly established the chronological patterns of cellular interactions that occur during the initial and transitional phases of the atherogenic process. These include: adherence of leukocytes to the endothelial surface, chemotactic attraction of the leukocytes into the arterial intima, conversion of monocytes to foam cells, stimulation of smooth muscle cell migration, connective tissue synthesis and proliferation, inflammatory and immune activation of macrophages and T lymphocytes, and the necrosis or apoptosis of cells within the developing lesions. Recent studies have begun to provide-mechanistic explanations for these observed cellular events. For example, the adherence of leukocytes to the endothelium appears to be dependent on the increased expression of adherence molecules by endothelial cells. The formation of foam cells is likely dependent on an increase in the expression of modified lipoprotein receptors. An increase in the migration and proliferation of macrophages, T lymphocytes, and smooth muscle cells appears to be in response to the inflammatory activation of cells with a resulting increase in the secretion of cytokines, che...Continue Reading

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