Do Glomerular Atherosclerosis and Lipid-Mediated Tubulo-lnterstitial Disease Cause Progressive Renal Failure in Man?

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Abstract
The nephrotic syndrome presents the kidney with a new environment in which blood vessels, glomerular structures and tubules are exposed over substantial periods of time to lipoproteins. LDL has charge affinity with glomerular basement membrane glycosaminoglycans, so potentially increases or maintains albumin loss. This in turn stimulates LDL synthesis. HDL is small enough to be passed by the glomerular filter in substantial amounts and has been found to stimulate endothelin-1 production by human proximal tubular cells in culture. LDL also inhibits nitric oxide vasodilatory responses, an action which when added to that of endothelin-1 may result in decreased renal tissue oxygenation. Taken together, these aspects of the nephrotic syndrome broaden conventional definitions of atherosclerosis and offer a number of targets for therapy in progressive renal disease.

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