2018
Acid Stimulation of the Citrate Transporter NaDC-1 Requires Pyk2 and ERK1/2 Signaling Pathways
Zacchia M, Tian X, Zona E, Alpern RJ, Preisig PA. Acid Stimulation of the Citrate Transporter NaDC-1 Requires Pyk2 and ERK1/2 Signaling Pathways. Journal Of The American Society Of Nephrology 2018, 29: 1720-1730. PMID: 29678998, PMCID: PMC6054333, DOI: 10.1681/asn.2017121268.Peer-Reviewed Original ResearchMeSH KeywordsAcidsAmmonium ChlorideAnimalsCells, CulturedCitric AcidCSK Tyrosine-Protein KinaseDicarboxylic Acid TransportersEndothelin-1Epithelial CellsFocal Adhesion Kinase 2Kidney Tubules, ProximalMAP Kinase Signaling SystemMiceMice, KnockoutMitogen-Activated Protein Kinase 1Mitogen-Activated Protein Kinase 3OpossumsOrganic Anion Transporters, Sodium-DependentPhosphorylationProto-Oncogene Proteins c-rafReceptor, Endothelin BRibosomal Protein S6 Kinases, 90-kDaSrc-Family KinasesTransfectionConceptsET-1/ETEndothelin-1Proximal tubulesCultured opossum kidney cellsAcid stimulationInhibition of Pyk2ET-1 stimulationRenal proximal tubulesNaDC-1Opossum kidney cellsCl loadingC-SrcPhosphorylation of Raf1Urine citratePyk2 knockdownEnd pointAcid loadApical NaERK1/2 pathwayStimulationMiceKidney cellsKidneyPyk2ERK1/2
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
Role of c-SRC and ERK in acid-induced activation of NHE3
Tsuganezawa H, Sato S, Yamaji Y, Preisig PA, Moe OW, Alpern RJ. Role of c-SRC and ERK in acid-induced activation of NHE3. Kidney International 2002, 62: 41-50. PMID: 12081562, DOI: 10.1046/j.1523-1755.2002.00418.x.Peer-Reviewed Original ResearchMeSH KeywordsAcidosisAmmonium ChlorideAnimalsCells, CulturedCSK Tyrosine-Protein KinaseEnzyme ActivationJNK Mitogen-Activated Protein KinasesMaleMitogen-Activated Protein Kinase 1Mitogen-Activated Protein Kinase 3Mitogen-Activated Protein KinasesPhosphorylationProtein Serine-Threonine KinasesProtein-Tyrosine KinasesProto-Oncogene Proteins c-fosRatsRats, Sprague-DawleySodium-Hydrogen Exchanger 3Sodium-Hydrogen ExchangersSrc-Family KinasesConceptsOKP cellsAcid-induced activationNHE3 activityERK/c-fosC-fos expressionC-Fos activationCytoplasmic pH (pHi) recoveryC-SrcRenal proximal tubulesAcid incubationActivation of NHE3Renal epithelial cellsCultured renal epithelial cellsProximal tubulesChronic acidosisInhibition of MEKNHE3 activationInhibited activationNormal levelsAcid loadImmune complex kinase assayERK kinaseAcidosisPH recoveryEpithelial cells
1998
Dominant negative c-Src inhibits angiotensin II induced activation of NHE3 in OKP cells
Tsuganezawa H, Preisig P, Alpern R. Dominant negative c-Src inhibits angiotensin II induced activation of NHE3 in OKP cells. Kidney International 1998, 54: 394-398. PMID: 9690205, DOI: 10.1046/j.1523-1755.1998.00029.x.Peer-Reviewed Original ResearchConceptsNa/H antiporter activityAngiotensin IIOKP cellsInhibits angiotensin IIVascular smooth muscleTyrosine kinase inhibitorsC-SrcHerbimycin AAntiporter activityNa/H antiporterActivation of NHE3Smooth muscleProximal tubulesPotent stimulatorNHE3 activationRegulation of NHE3Key mediatorKinase inhibitorsClonal cell linesNHE3 activityAntiporter activationCyclic AMPCell linesNHE3Acidosis
1997
Media acidification inhibits TGF beta-mediated growth suppression in cultured rabbit proximal tubule cells.
Tovbin D, Franch HA, Alpern RJ, Preisig PA. Media acidification inhibits TGF beta-mediated growth suppression in cultured rabbit proximal tubule cells. Proceedings Of The Association Of American Physicians 1997, 109: 572-9. PMID: 9394419.Peer-Reviewed Original ResearchConceptsDirect antiproliferative effectRabbit proximal tubule cellsProximal tubule cellsAntiproliferative effectsGrowth-suppressive effectsMetabolic acidosisCultured rabbit proximal tubule cellsTubule cellsChronic metabolic acidosisInhibits cell cycle progressionRenal functionRenal growthMitogen-stimulated cellsRenal epithelial cellsProgressive lossHyperplasiaHypertrophyCell cycle progressionEpithelial cellsPrimary culturesPRB phosphorylationAcidosisEGF-induced phosphorylationGrowth suppressionCycle progressionChronic metabolic acidosis enhances NHE-3 protein abundance and transport activity in the rat thick ascending limb by increasing NHE-3 mRNA.
Laghmani K, Borensztein P, Ambühl P, Froissart M, Bichara M, Moe OW, Alpern RJ, Paillard M. Chronic metabolic acidosis enhances NHE-3 protein abundance and transport activity in the rat thick ascending limb by increasing NHE-3 mRNA. Journal Of Clinical Investigation 1997, 99: 24-30. PMID: 9011571, PMCID: PMC507763, DOI: 10.1172/jci119128.Peer-Reviewed Original Research
1995
Involvement of pRB family in TGF beta-dependent epithelial cell hypertrophy.
Franch HA, Shay JW, Alpern RJ, Preisig PA. Involvement of pRB family in TGF beta-dependent epithelial cell hypertrophy. Journal Of Cell Biology 1995, 129: 245-254. PMID: 7698989, PMCID: PMC2120382, DOI: 10.1083/jcb.129.1.245.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntigens, Polyomavirus TransformingBlotting, NorthernCell CycleCell DivisionCell LineCells, CulturedEpidermal Growth FactorEpithelial CellsEpitheliumGene ExpressionHumansHypertrophyKidneyKidney TubulesKineticsOncogene Proteins, ViralPapillomavirus E7 ProteinsPhosphorylationProto-Oncogene Proteins c-fosRabbitsRatsRecombinant ProteinsRepressor ProteinsRetinoblastoma ProteinRNA, MessengerTransfectionTransforming Growth Factor betaTumor Suppressor Protein p53ConceptsEpithelial cell hypertrophyNRK-52E cellsCell hypertrophyHPV16 E6TGF betaSV40 large T antigenC-fos mRNA abundanceGrowth factor beta 1SV40 large T antigen expressionLarge T antigenLarge T antigen expressionMechanisms of hypertrophyRenal cell hypertrophyRabbit proximal tubuleActive pRbT-antigen expressionRenal functionT antigenRenal hypertrophyAntigen expressionEpidermal growth factorEGF-induced increaseProximal tubulesHypertrophyHPV16 E7Na+/H+ antiporter (NHE-1 isoform) in cultured vascular smooth muscle from the spontaneously hypertensive rat
LaPointe M, Ye M, Moe O, Alpern R, Batlle D. Na+/H+ antiporter (NHE-1 isoform) in cultured vascular smooth muscle from the spontaneously hypertensive rat. Kidney International 1995, 47: 78-87. PMID: 7731174, DOI: 10.1038/ki.1995.9.Peer-Reviewed Original ResearchConceptsVascular smooth muscle cellsCultured aortic vascular smooth muscle cellsWistar/Kyoto ratsAortic vascular smooth muscle cellsWKY ratsHypertensive ratsNominal absenceCultured vascular smooth muscleVascular smooth muscleSmooth muscle cellsCell acidificationRate of intracellularNormotensive controlsKyoto ratsNHE-1 isoformWKY cellsSmooth muscleSHRHigh functional activityRatsMuscle cellsThymidine incorporationPresence of HCO3Exchange activityHCO3-/CO2
1993
Chronic regulation of the Na/H antiporter.
Alpern RJ, Yamaji Y, Cano A, Horie S, Miller RT, Moe OW, Preisig PA. Chronic regulation of the Na/H antiporter. Translational Research 1993, 122: 137-40. PMID: 8393472.Peer-Reviewed Original ResearchConceptsNa/H antiporter activityNa/H antiporterChronic regulationH antiporterAcute inhibitory effectRabbit proximal tubule cellsAcid-induced increaseProximal tubule cellsOpossum kidney cellsMRNA abundanceProtein kinase AChronic decreaseAntiporter activityChronic studiesChronic activationTubule cellsImmediate early genesIntact animalsKinase AInhibitory effectProtein synthesisNonrenal cellsPrimary culturesC-fosExtracellular fluidRenin expression in renal proximal tubule.
Moe OW, Ujiie K, Star RA, Miller RT, Widell J, Alpern RJ, Henrich WL. Renin expression in renal proximal tubule. Journal Of Clinical Investigation 1993, 91: 774-779. PMID: 7680667, PMCID: PMC288027, DOI: 10.1172/jci116296.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBase SequenceBlotting, SouthernCells, CulturedCloning, MolecularColforsinEnalaprilIn Vitro TechniquesIsoproterenolKidney Tubules, ProximalKineticsMaleMolecular Sequence DataMuscle, Smooth, VascularOligodeoxyribonucleotidesPoly APolymerase Chain ReactionRabbitsRatsRats, Sprague-DawleyReninRNARNA, MessengerTranscription, GeneticConceptsProximal tubule cellsCultured proximal tubule cellsRenin-angiotensin systemProximal tubulesRenal proximal tubulesTubule cellsRenin activityLocal renin-angiotensin systemPrimary culturesPresence of reninRabbit proximal tubule cellsAngiotensin-converting enzymeMammalian renal proximal tubulePrevious immunohistochemical studiesSynthesized reninAngiotensin receptorsAngiotensin IIRenin contentPolymerase chain reactionRenin expressionImmunohistochemical studyM isoproterenolM forskolinNormal ratsRenin mRNA
1992
Induction of stress proteins in cultured myogenic cells. Molecular signals for the activation of heat shock transcription factor during ischemia.
Benjamin IJ, Horie S, Greenberg ML, Alpern RJ, Williams RS. Induction of stress proteins in cultured myogenic cells. Molecular signals for the activation of heat shock transcription factor during ischemia. Journal Of Clinical Investigation 1992, 89: 1685-1689. PMID: 1569208, PMCID: PMC443048, DOI: 10.1172/jci115768.Peer-Reviewed Original ResearchConceptsGlucose deprivationControl levelsATP depletionHeat shock protein 70Ischemic injuryHeat shock factorIschemic tissueIschemic cellsHigh-pressure liquid chromatographyHypoxia resultsM rotenoneC2 myogenic cellsStress proteinsMyogenic cellsNormoxic conditionsOxidative metabolismProtein 70ATP storesCultured myogenic cellsConsensus heat shock elementIschemiaATP poolHSF activationMajor stress proteinsDNA-binding activityLong-term activation of protein kinase c causes chronic Na/H antiporter stimulation in cultured proximal tubule cells.
Horie S, Moe O, Miller RT, Alpern RJ. Long-term activation of protein kinase c causes chronic Na/H antiporter stimulation in cultured proximal tubule cells. Journal Of Clinical Investigation 1992, 89: 365-372. PMID: 1310692, PMCID: PMC442861, DOI: 10.1172/jci115594.Peer-Reviewed Original ResearchConceptsNa/H antiporter activityProximal tubule cellsCultured proximal tubule cellsLong-term activationTubule cellsProtein kinase CShort-term activationDose-dependent increaseKinase CActivity 24 hActinomycin DAntiporter activityNa/H antiporterChronic conditionsTwo- to threefold increaseAcute increaseEffect of phorbolProtein kinase C activationChronic effectsTransient increaseMicroM cycloheximidePersistent increaseAlpha-PMAKinase C activationChronic regulator
1991
Differential regulation of Na/H antiporter by acid in renal epithelial cells and fibroblasts.
Moe OW, Miller RT, Horie S, Cano A, Preisig PA, Alpern RJ. Differential regulation of Na/H antiporter by acid in renal epithelial cells and fibroblasts. Journal Of Clinical Investigation 1991, 88: 1703-1708. PMID: 1658050, PMCID: PMC295708, DOI: 10.1172/jci115487.Peer-Reviewed Original ResearchConceptsNa/H antiporter activityRenal tubule cellsNa/H antiporterMCT cellsRenal epithelial cellsTubule cellsCell linesCultured renal tubule cellsEpithelial cellsMRNA abundanceOpossum kidney cell lineChronic metabolic acidosisAcid preincubationTubule cell lineRat renal cortexH antiporterAntiporter activityUnderlying molecular mechanismsDifferential regulationMetabolic acidosisRenal cortexAcidotic environmentAcid feedingAdaptive increaseKidney cell line
1990
Preincubation in acid medium increases Na/H antiporter activity in cultured renal proximal tubule cells.
Horie S, Moe O, Tejedor A, Alpern RJ. Preincubation in acid medium increases Na/H antiporter activity in cultured renal proximal tubule cells. Proceedings Of The National Academy Of Sciences Of The United States Of America 1990, 87: 4742-4745. PMID: 2162055, PMCID: PMC54193, DOI: 10.1073/pnas.87.12.4742.Peer-Reviewed Original ResearchConceptsNa/H antiporter activityProximal tubule cellsTubule cellsCultured renal proximal tubule cellsCultured proximal tubule cellsRenal proximal tubule cellsPreincubation of fibroblastsExtracellular fluidAntiporter activityChronic acidosisAcidotic environmentCO2/HCO3Small inhibitionPreincubationPreincubation mediumAddition of cycloheximideCell acidificationAcid preincubationPresent studyProtein synthesisCellsAcidosisActivityEpithelium