WNK4 regulates activity of the epithelial Na+ channel in vitro and in vivo
Ring AM, Cheng SX, Leng Q, Kahle KT, Rinehart J, Lalioti MD, Volkman HM, Wilson FH, Hebert SC, Lifton RP. WNK4 regulates activity of the epithelial Na+ channel in vitro and in vivo. Proceedings Of The National Academy Of Sciences Of The United States Of America 2007, 104: 4020-4024. PMID: 17360470, PMCID: PMC1805455, DOI: 10.1073/pnas.0611727104.Peer-Reviewed Original ResearchConceptsPseudohypoaldosteronism type IIDistal nephronPHAII-mutant WNK4Wild-type littermatesNa-Cl cotransporterAldosterone systemIntravascular volumeDistal colonSodium balanceElectrolyte homeostasisColonic epitheliumMajor mediatorDiverse mediatorsAltered activityENaC betaWNK4's inhibitionKinase activityIntact C-terminusPHAII-causing mutationsMiceWNK4MediatorsDownstream targetsWNK4 kinase activityENaCAn SGK1 site in WNK4 regulates Na+ channel and K+ channel activity and has implications for aldosterone signaling and K+ homeostasis
Ring AM, Leng Q, Rinehart J, Wilson FH, Kahle KT, Hebert SC, Lifton RP. An SGK1 site in WNK4 regulates Na+ channel and K+ channel activity and has implications for aldosterone signaling and K+ homeostasis. Proceedings Of The National Academy Of Sciences Of The United States Of America 2007, 104: 4025-4029. PMID: 17360471, PMCID: PMC1803763, DOI: 10.1073/pnas.0611728104.Peer-Reviewed Original ResearchConceptsIntravascular volume depletionNa-Cl cotransporterAldosterone signalingPseudohypoaldosteronism type IIVolume depletionPhysiologic responsesNaCl reabsorptionPHAII-mutant WNK4Steroid hormone aldosteroneRenal outer medullaryRenal NaCl reabsorptionFunctional stateWNK4 mutationsROMK activityHormone aldosteroneOuter medullaryHyperkalemiaSecretionKidneyWild-type WNK4ReabsorptionAldosteroneChannel activityChannel ENaCWNK4