LDL receptor‐related protein: a multiligand receptor for lipoprotein and proteinase catabolism

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Abstract
The accumulation of excessive cholesterol-rich lipoproteins within vascular cells, the proliferation of vascular cells, and fibrin deposition are hallmark features of atherosclerosis. Evidence accumulated over the past few years supports the hypothesis that one member of the LDL receptor family, the low density lipoprotein receptor-related protein (LRP), affects the dynamics of each of these processes. LRP is expressed in several vascular cell types, including smooth muscle cells, and in macrophages, and is also expressed in these cells in atherosclerotic lesions. This receptor is a large endocytotic receptor that mediates the catabolism of a number of molecules known to be important in vascular biology, including apolipoprotein E- and lipoprotein lipase-enriched lipoproteins, thrombospondin, and plasminogen activators. The capacity of LRP to mediate lipoprotein catabolism may be a factor in the development of the lesion by contributing to the formation of foam cells. LRP has recently been shown to mediat...

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