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Article: Hepatocyte growth factor signaling ameliorates podocyte injury and proteinuria

TitleHepatocyte growth factor signaling ameliorates podocyte injury and proteinuria
Authors
Issue Date2010
Citation
Kidney International, 2010, v. 77 n. 11, p. 962-973 How to Cite?
AbstractHepatocyte growth factor (HGF) is a potent antifibrotic protein that inhibits kidney fibrosis through several mechanisms. To study its role in podocyte homeostasis, injury, and repair in vivo, we generated conditional knockout mice in which the HGF receptor, c-met, was specifically deleted in podocytes using the Cre-LoxP system. Mice with podocyte-specific ablation of c-met (podo-met -/-) developed normally. No albuminuria or overt pathologic lesions were detected up to 6 months of age, suggesting that HGF signaling is dispensable for podocyte maturation, survival, and function under normal physiologic conditions. However, after adriamycin treatment, podo-met -/-mice developed more severe podocyte injury and albuminuria than their control littermates. Ablation of c-met also resulted in more profound suppression of Wilms tumor 1 (WT1) and nephrin expression, and podocyte apoptosis after injury. When HGF was expressed ectopically in vivo, it ameliorated adriamycin-induced albuminuria, preserved WT1 and nephrin expression, and inhibited podocyte apoptosis. However, exogenous HGF failed to significantly reduce albuminuria in podo-met -/-mice, suggesting that podocyte-specific c-met activation by HGF confers renal protection. In vitro, HGF was able to preserve WT1 and nephrin expression in cultured podocytes after adriamycin treatment. HGF also protected podocytes from apoptosis induced by a lethal dose of adriamycin primarily through a phosphoinositide 3-kinase (PI3K)/Akt-dependent pathway. Collectively, these results indicate that HGF/c-met signaling has an important role in protecting podocytes from injury, thereby reducing proteinuria. © 2010 International Society of Nephrology.
Persistent Identifierhttp://hdl.handle.net/10722/195487
ISSN
2015 Impact Factor: 7.683
2015 SCImago Journal Rankings: 3.181
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDai, C-
dc.contributor.authorSaleem, MA-
dc.contributor.authorHolzman, LB-
dc.contributor.authorMathieson, P-
dc.contributor.authorLiu, Y-
dc.date.accessioned2014-02-28T06:12:13Z-
dc.date.available2014-02-28T06:12:13Z-
dc.date.issued2010-
dc.identifier.citationKidney International, 2010, v. 77 n. 11, p. 962-973-
dc.identifier.issn0085-2538-
dc.identifier.urihttp://hdl.handle.net/10722/195487-
dc.description.abstractHepatocyte growth factor (HGF) is a potent antifibrotic protein that inhibits kidney fibrosis through several mechanisms. To study its role in podocyte homeostasis, injury, and repair in vivo, we generated conditional knockout mice in which the HGF receptor, c-met, was specifically deleted in podocytes using the Cre-LoxP system. Mice with podocyte-specific ablation of c-met (podo-met -/-) developed normally. No albuminuria or overt pathologic lesions were detected up to 6 months of age, suggesting that HGF signaling is dispensable for podocyte maturation, survival, and function under normal physiologic conditions. However, after adriamycin treatment, podo-met -/-mice developed more severe podocyte injury and albuminuria than their control littermates. Ablation of c-met also resulted in more profound suppression of Wilms tumor 1 (WT1) and nephrin expression, and podocyte apoptosis after injury. When HGF was expressed ectopically in vivo, it ameliorated adriamycin-induced albuminuria, preserved WT1 and nephrin expression, and inhibited podocyte apoptosis. However, exogenous HGF failed to significantly reduce albuminuria in podo-met -/-mice, suggesting that podocyte-specific c-met activation by HGF confers renal protection. In vitro, HGF was able to preserve WT1 and nephrin expression in cultured podocytes after adriamycin treatment. HGF also protected podocytes from apoptosis induced by a lethal dose of adriamycin primarily through a phosphoinositide 3-kinase (PI3K)/Akt-dependent pathway. Collectively, these results indicate that HGF/c-met signaling has an important role in protecting podocytes from injury, thereby reducing proteinuria. © 2010 International Society of Nephrology.-
dc.languageeng-
dc.relation.ispartofKidney International-
dc.titleHepatocyte growth factor signaling ameliorates podocyte injury and proteinuria-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1038/ki.2010.40-
dc.identifier.pmid20375988-
dc.identifier.scopuseid_2-s2.0-77955877135-
dc.identifier.volume77-
dc.identifier.issue11-
dc.identifier.spage962-
dc.identifier.epage973-
dc.identifier.isiWOS:000277626700006-

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