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First published online 9 January 2008
doi: 10.1242/dev.001081
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Review |
1 Samuel Lunenfeld Research Institute, Mount Sinai Hospital, and Division of
Nephrology, St. Michael's Hospital, University of Toronto, 600 University
Avenue, Toronto, Ontario M5G 1X5, Canada.
2 Department of Medicine, Children's Hospital, and Department of Pediatrics,
Harvard Medical School, Boston, MA 02115, USA.
* Author for correspondence (e-mail: Jordan.Kreidberg{at}childrens.harvard.edu)
SUMMARY
The glomerulus of the mammalian kidney is an intricate structure that contains an unusual filtration barrier that retains higher molecular weight proteins and blood cells in the circulation. Recent studies have changed our conception of the glomerulus from a relatively static structure to a dynamic one, whose integrity depends on signaling between the three major cell lineages: podocytes, endothelial and mesangial cells. Research into the signaling pathways that control glomerular development and then maintain glomerular integrity and function has recently identified several genes, such as the nephrin and Wilms' tumor 1 genes, that are mutated in human kidney disease.