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- W1978268623 abstract "The nephrology community lacks a unified view of protein sieving through the glomerular capillary wall. The glomerular capillary wall consists of three distinct but closely interacting layers: the fenestrated endothelium, with its glycocalyx; the podocytes, with their interdigitated foot processes and slit diaphragms; and the intervening glomerular basement membrane. Proteinuria is associated with abnormalities in any one layer, suggesting that each contributes to the glomerular filtration barrier (GFB). Proteinuria can also be induced in the context of a normal glomerular capillary wall. Here, we review some classic studies as well as some newer concepts and present competing hypotheses about the GFB.Two almost forgotten concepts have recently emerged. One group has challenged the exquisite selectivity of the GFB to albumin and suggested that proteinuria is the result of abnormal tubular uptake. There has also been a reemphasis on diffusion through the glomerular basement membrane as the driving force behind macromolecular filtration. New evidence suggests that the endothelial glycocalyx is an important charge-selective barrier.We suggest viewing the GFB as a dynamic rather than as a rigid barrier, requiring three healthy layers and a hemodynamic steady state. Multiple challenges to studying the endothelium, the tubular handling of albumin, and the role of hemodynamic forces will require new tools, new hypotheses, and open minds." @default.
- W1978268623 created "2016-06-24" @default.
- W1978268623 creator A5076535178 @default.
- W1978268623 creator A5082640970 @default.
- W1978268623 date "2009-05-01" @default.
- W1978268623 modified "2023-10-17" @default.
- W1978268623 title "Update on the glomerular filtration barrier" @default.
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- W1978268623 doi "https://doi.org/10.1097/mnh.0b013e3283296044" @default.
- W1978268623 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2895306" @default.
- W1978268623 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19374010" @default.
- W1978268623 hasPublicationYear "2009" @default.
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