2004
A consensus sequence in the endothelin-B receptor second intracellular loop is required for NHE3 activation by endothelin-1
Laghmani K, Sakamoto A, Yanagisawa M, Preisig PA, Alpern RJ. A consensus sequence in the endothelin-B receptor second intracellular loop is required for NHE3 activation by endothelin-1. American Journal Of Physiology. Renal Physiology 2004, 288: f732-f739. PMID: 15598844, DOI: 10.1152/ajprenal.00300.2004.Peer-Reviewed Original ResearchConceptsEndothelin-1Second intracellular loopET-1 stimulationNHE3 activityIntracellular loopEndothelin-A receptorAdenylyl cyclase inhibitionET-1 regulationProximal tubule apical membraneET receptorsCyclase inhibitionOKP cellsNHE3 activationOpossum kidneyExchanger 3ReceptorsStimulationProtein tyrosine phosphorylationReceptor chimerasPresent studyCellsAdditional mechanismTyrosine phosphorylationApical membraneSimilar pattern
2002
Glucagon Acutely Inhibits but Chronically Activates Na+/H+ Antiporter 3 Activity in OKP Cells
Amemiya M, Kusano E, Muto S, Tabei K, Ando Y, Alpern RJ, Asano Y. Glucagon Acutely Inhibits but Chronically Activates Na+/H+ Antiporter 3 Activity in OKP Cells. Nephron 2002, 10: 26-33. PMID: 11803202, DOI: 10.1159/000049895.Peer-Reviewed Original ResearchConceptsNHE3 protein abundanceOKP cellsNHE3 activityCell pH recoveryRat renal proximal tubulesDibutyryl cAMPThick ascending limbRenal proximal tubulesWestern blot analysisM dibutyryl-cAMPChronic activationPKA-dependent pathwayProximal tubulesAscending limbGlucagonSurface membraneAcid loadNHE3 mRNAProtein abundancePH recoveryExchanger 3Independent mechanismsSignificant increaseBlot analysisP cells
2001
ETB receptor activation causes exocytic insertion of NHE3 in OKP cells
Peng Y, Amemiya M, Yang X, Fan L, Moe O, Yin H, Preisig P, Yanagisawa M, Alpern R. ETB receptor activation causes exocytic insertion of NHE3 in OKP cells. American Journal Of Physiology. Renal Physiology 2001, 280: f34-f42. PMID: 11133512, DOI: 10.1152/ajprenal.2001.280.1.f34.Peer-Reviewed Original ResearchConceptsEndothelin-1Sodium/hydrogen exchanger 3ET-1-induced increaseTotal cellular NHE3NHE3 activityNET traffickingTwo- to threefold increaseApical membrane NHE3OKP cellsMaximal effectReceptor activationClone PApical NHE3Exchanger 3NHE3Exocytic insertionThreefold increaseApical membraneCytochalasin D
2000
Acid incubation causes exocytic insertion of NHE3 in OKP cells
Yang X, Amemiya M, Peng Y, Moe O, Preisig P, Alpern R. Acid incubation causes exocytic insertion of NHE3 in OKP cells. American Journal Of Physiology - Cell Physiology 2000, 279: c410-c419. PMID: 10913008, DOI: 10.1152/ajpcell.2000.279.2.c410.Peer-Reviewed Original Research
1999
Glucocorticoids enhance acid activation of the Na+/H+ exchanger 3 (NHE3)
Ambühl P, Yang X, Peng Y, Preisig P, Moe O, Alpern R. Glucocorticoids enhance acid activation of the Na+/H+ exchanger 3 (NHE3). Journal Of Clinical Investigation 1999, 103: 429-435. PMID: 9927505, PMCID: PMC407891, DOI: 10.1172/jci2913.Peer-Reviewed Original ResearchConceptsNHE3 protein abundanceM hydrocortisoneNHE3 activityAcid incubationNHE3 mRNA abundanceTrafficking of NHE3Absence of hydrocortisoneOpossum kidney cellsExogenous glucocorticoidsExchanger 3 (NHE3) activityHydrocortisoneProtein abundanceGlucocorticoidsProtein synthesisExchanger 3Kidney cellsTwofold increaseMRNA abundanceApical membrane
1998
Chronic hyperosmolality increases NHE3 activity in OKP cells.
Ambühl P, Amemiya M, Preisig PA, Moe OW, Alpern RJ. Chronic hyperosmolality increases NHE3 activity in OKP cells. Journal Of Clinical Investigation 1998, 101: 170-177. PMID: 9421479, PMCID: PMC508553, DOI: 10.1172/jci62.Peer-Reviewed Original ResearchConceptsNa/H exchanger 3Na/H antiporter activityDiabetes mellitusNHE3 mRNA abundanceNHE3 protein abundanceAntiporter activityChronic hypertonicityGlomerular hyperfiltrationDiabetic nephropathyNa/H antiporterChronic hyperosmolalityOKP cellsExchanger 3MOsm/NHE3 activityRelevant increaseMellitusSignificant increaseChronicH antiporterExtracellular glucoseHypertonic incubationMRNA abundanceHypertonicitySmall increase