Renal tubular NEDD4-2 deficiency causes NCC-mediated salt-dependent hypertension.

Fiche du document

Auteurs
Date

2013

Type de document
Périmètre
Langue
Identifiants
Source

Serveur académique Lausannois

Relations

Ce document est lié à :
info:eu-repo/semantics/altIdentifier/doi/10.1172/JCI61110

Ce document est lié à :
info:eu-repo/semantics/altIdentifier/pmid/23348737

Ce document est lié à :
info:eu-repo/semantics/altIdentifier/eissn/1558-8238

Ce document est lié à :
info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_218B3682F1561

Collection

Serveur Académique Lausannois

Organisation

Université de Lausanne et CHUV

Licences

info:eu-repo/semantics/restrictedAccess , Restricted: indefinite embargo , Copying allowed only for non-profit organizations , https://serval.unil.ch/disclaimer

Mots-clés 0

Animals; Blood Pressure; Disease Models, Animal; Endosomal Sorting Complexes Required for Transport/deficiency; Endosomal Sorting Complexes Required for Transport/genetics; Epithelial Sodium Channels/metabolism; Humans; Hypertension/etiology; Hypertension/genetics; Kidney Tubules/physiopathology; Liddle Syndrome/etiology; Liddle Syndrome/genetics; Mice; Mice, Knockout; Potassium/blood; Potassium/urine; Potassium Channels, Inwardly Rectifying/metabolism; Receptors, Drug/metabolism; Sodium/blood; Sodium/urine; Sodium, Dietary/administration & dosage; Sodium, Dietary/adverse effects; Symporters/metabolism; Ubiquitin-Protein Ligases/deficiency; Ubiquitin-Protein Ligases/genetics

Sujets proches En

Mouse House mice Mus musculus House mouse

Citer ce document

C. Ronzaud et al., « Renal tubular NEDD4-2 deficiency causes NCC-mediated salt-dependent hypertension. », Serveur académique Lausannois, ID : 10.1172/JCI61110

Métriques

Partage / Export

Résumé 0

The E3 ubiquitin ligase NEDD4-2 (encoded by the Nedd4L gene) regulates the amiloride-sensitive epithelial Na+ channel (ENaC/SCNN1) to mediate Na+ homeostasis. Mutations in the human β/γENaC subunits that block NEDD4-2 binding or constitutive ablation of exons 6-8 of Nedd4L in mice both result in salt-sensitive hypertension and elevated ENaC activity (Liddle syndrome). To determine the role of renal tubular NEDD4-2 in adult mice, we generated tetracycline-inducible, nephron-specific Nedd4L KO mice. Under standard and high-Na+ diets, conditional KO mice displayed decreased plasma aldosterone but normal Na+/K+ balance. Under a high-Na+ diet, KO mice exhibited hypercalciuria and increased blood pressure, which were reversed by thiazide treatment. Protein expression of βENaC, γENaC, the renal outer medullary K+ channel (ROMK), and total and phosphorylated thiazide-sensitive Na+Cl- cotransporter (NCC) levels were increased in KO kidneys. Unexpectedly, Scnn1a mRNA, which encodes the αENaC subunit, was reduced and proteolytic cleavage of αENaC decreased. Taken together, these results demonstrate that loss of NEDD4-2 in adult renal tubules causes a new form of mild, salt-sensitive hypertension without hyperkalemia that is characterized by upregulation of NCC, elevation of β/γENaC, but not αENaC, and a normal Na+/K+ balance maintained by downregulation of ENaC activity and upregulation of ROMK.

document thumbnail

Par les mêmes auteurs

Sur les mêmes sujets

Exporter en