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Article: Nephrotic plasma alters slit diaphragm-dependent signaling and translocates nephrin, podocin, and CD2 associated protein in cultured human podocytes

TitleNephrotic plasma alters slit diaphragm-dependent signaling and translocates nephrin, podocin, and CD2 associated protein in cultured human podocytes
Authors
Issue Date2005
Citation
Journal of the American Society of Nephrology, 2005, v. 16 n. 3, p. 629-637 How to Cite?
AbstractPodocytes are critical in maintaining the filtration barrier of the glomerulus and are dependent on the slit diaphragm (SD) proteins nephrin, podocin, and CD2-associated protein (CD2AP) to function optimally. The effects of normal human plasma and nephrotic plasma on podocytes were tested, focusing particularly on the SD complex. With the use of a conditionally immortalized human podocyte cell line, it first was shown that exposure to normal and non-nephrotic human plasma leads to a concentration of nephrin, podocin, CD2AP, and actin at the cell surface. Next, the effects of plasma from patients with nephrotic conditions to non-nephrotic conditions were compared. When exposed to all nephrotic plasma samples (and a non-human serum control), nephrin podocin and CD2AP assumed a cytoplasmic distribution; nephrin and synaptopodin were selectively downregulated, and the relocation of nephrin induced by nephrotic plasma could be rescued back to the plasma membrane by co-incubation with non-nephrotic plasma. Furthermore, intracellular calcium signaling was altered by nephrotic plasma, which was mediated by tyrosine kinase phosphorylation. With the use of nephrin mutant human cell lines, it was shown that this signaling and translocation response to normal plasma is nephrin dependent. This work demonstrates that nephrotic plasma seems to be deficient in factors that act via the podocyte SD complex, which are essential in maintaining its physiologic function. Copyright © 2005 by the American Society of Nephrology.
Persistent Identifierhttp://hdl.handle.net/10722/195396
ISSN
2015 Impact Factor: 8.491
2015 SCImago Journal Rankings: 4.699
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCoward, RJM-
dc.contributor.authorFoster, RR-
dc.contributor.authorPatton, D-
dc.contributor.authorNi, L-
dc.contributor.authorLennon, R-
dc.contributor.authorBates, DO-
dc.contributor.authorHarper, SJ-
dc.contributor.authorMathieson, PW-
dc.contributor.authorSaleem, MA-
dc.date.accessioned2014-02-28T06:12:05Z-
dc.date.available2014-02-28T06:12:05Z-
dc.date.issued2005-
dc.identifier.citationJournal of the American Society of Nephrology, 2005, v. 16 n. 3, p. 629-637-
dc.identifier.issn1046-6673-
dc.identifier.urihttp://hdl.handle.net/10722/195396-
dc.description.abstractPodocytes are critical in maintaining the filtration barrier of the glomerulus and are dependent on the slit diaphragm (SD) proteins nephrin, podocin, and CD2-associated protein (CD2AP) to function optimally. The effects of normal human plasma and nephrotic plasma on podocytes were tested, focusing particularly on the SD complex. With the use of a conditionally immortalized human podocyte cell line, it first was shown that exposure to normal and non-nephrotic human plasma leads to a concentration of nephrin, podocin, CD2AP, and actin at the cell surface. Next, the effects of plasma from patients with nephrotic conditions to non-nephrotic conditions were compared. When exposed to all nephrotic plasma samples (and a non-human serum control), nephrin podocin and CD2AP assumed a cytoplasmic distribution; nephrin and synaptopodin were selectively downregulated, and the relocation of nephrin induced by nephrotic plasma could be rescued back to the plasma membrane by co-incubation with non-nephrotic plasma. Furthermore, intracellular calcium signaling was altered by nephrotic plasma, which was mediated by tyrosine kinase phosphorylation. With the use of nephrin mutant human cell lines, it was shown that this signaling and translocation response to normal plasma is nephrin dependent. This work demonstrates that nephrotic plasma seems to be deficient in factors that act via the podocyte SD complex, which are essential in maintaining its physiologic function. Copyright © 2005 by the American Society of Nephrology.-
dc.languageeng-
dc.relation.ispartofJournal of the American Society of Nephrology-
dc.titleNephrotic plasma alters slit diaphragm-dependent signaling and translocates nephrin, podocin, and CD2 associated protein in cultured human podocytes-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1681/ASN.2004030172-
dc.identifier.scopuseid_2-s2.0-20544465220-
dc.identifier.volume16-
dc.identifier.issue3-
dc.identifier.spage629-
dc.identifier.epage637-
dc.identifier.isiWOS:000227372000011-

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