KLHL3 mutations cause familial hyperkalemic hypertension by impairing ion transport in the distal nephron

Hélène Louis-Dit-Picard, Julien Barc, Daniel Trujillano, Stéphanie Miserey-Lenkei, Nabila Bouatia-Naji, Olena Pylypenko, Geneviève Beaurain, Amélie Bonnefond, Olivier Sand, Christophe Simian, Emmanuelle Vidal-Petiot, Christelle Soukaseum, Chantal Mandet, Françoise Broux, Olivier Chabre, Michel Delahousse, Vincent Esnault, Béatrice Fiquet, Pascal Houillier, Corinne Isnard BagnisJens Koenig, Martin Konrad, Paul Landais, Chebel Mourani, Patrick Niaudet, Vincent Probst, Christel Thauvin, Robert J. Unwin, Steven D. Soroka, Georg Ehret, Stephan Ossowski, Mark Caulfield, Patrick Bruneval, Xavier Estivill, Philippe Froguel, Juliette Hadchouel, Jean Jacques Schott, Xavier Jeunemaitre

Research output: Contribution to journalArticlepeer-review

286 Citations (Scopus)

Abstract

Familial hyperkalemic hypertension (FHHt) is a Mendelian form of arterial hypertension that is partially explained by mutations in WNK1 and WNK4 that lead to increased activity of the Na +-Cl - cotransporter (NCC) in the distal nephron. Using combined linkage analysis and whole-exome sequencing in two families, we identified KLHL3 as a third gene responsible for FHHt. Direct sequencing of 43 other affected individuals revealed 11 additional missense mutations that were associated with heterogeneous phenotypes and diverse modes of inheritance. Polymorphisms at KLHL3 were not associated with blood pressure. The KLHL3 protein belongs to the BTB-BACK-kelch family of actin-binding proteins that recruit substrates for Cullin3-based ubiquitin ligase complexes. KLHL3 is coexpressed with NCC and downregulates NCC expression at the cell surface. Our study establishes a role for KLHL3 as a new member of the complex signaling pathway regulating ion homeostasis in the distal nephron and indirectly blood pressure.

Original languageEnglish
Pages (from-to)456-460
Number of pages5
JournalNature Genetics
Volume44
Issue number4
DOIs
Publication statusPublished - Apr 2012

Bibliographical note

Funding Information:
We thank C. Büsst for her critical reading of the manuscript, E. Clauser, F. Auradé and C. Auzan for helpful discussions, E. Durand, S. Lecointe and F. De Graeve for their contribution to whole-exome sequencing and M. Longépée-Dupas for assistance in family screening. This work was supported by INSERM, the Agence Nationale pour la Recherche (ANR; 05-MRAR-010-01), the European Union Framework Programme 7 through the HYPERGENE project (HEALTH-F4-2007-201550) and through the GEUVADIS project (HEALTH-261123), the Leducq Foundation (Transatlantic Network on Hypertension; 07 CVD 01), the Fondation Leducq Trans-Atlantic Network of Excellence (05 CVD 01; Preventing Sudden Death), the Groupe de Réflexion sur la Recherche Cardiovasculaire and Biotronik and the Ministry of Science and Innovation (MICINN; SAF2008-00357).

ASJC Scopus Subject Areas

  • Genetics

PubMed: MeSH publication types

  • Journal Article

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