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The Molecular Interactions between Filtered Proteins and Proximal Tubular Cells in Proteinuria
journal contribution
posted on 2010-12-14, 16:32 authored by Richard J. Baines, Nigel J. BrunskillProteinuria is associated with progressive chronic kidney disease and poor cardiovascular outcomes. Exposure of proximal tubular epithelial cells to excess proteins leads to the development of proteinuric nephropathy with tubular atrophy, interstitial inflammation and scarring. Numerous signalling pathways are activated in proximal tubular epithelial cells under proteinuric conditions resulting in gene transcription, altered growth and the secretion of inflammatory and profibrotic mediators. Megalin, the proximal tubular scavenger receptor for filtered macromolecules, has intrinsic signalling functions and may also link albumin to growth factor receptor signalling via regulated intramembrane proteolysis. It now seems that endocytosis is not always a prerequisite for albumin-evoked alterations in proximal tubular cell phenotype. Recent evidence shows the presence of other potential receptors for proteins, such as the neonatal Fc receptor and CD36, in the proximal tubular epithelium.
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Nephron Experimental Nephrology, 2008, 110 (2), pp. E67-E71.Published in
Nephron Experimental NephrologyPublisher
Kargerissn
1660-8151Copyright date
2008Available date
2010-12-14Publisher DOI
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http://www.karger.com/Article/FullText/161982Language
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