2003
Active K+ secretion through multiple KCa-type channels and regulation by IKCa channels in rat proximal colon
Joiner WJ, Basavappa S, Vidyasagar S, Nehrke K, Krishnan S, Binder HJ, Boulpaep EL, Rajendran VM. Active K+ secretion through multiple KCa-type channels and regulation by IKCa channels in rat proximal colon. AJP Gastrointestinal And Liver Physiology 2003, 285: g185-g196. PMID: 12606302, DOI: 10.1152/ajpgi.00337.2002.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsApaminCarbacholChloridesCHO CellsCholinergic AgonistsClotrimazoleColonCricetinaeGene ExpressionGrowth InhibitorsIntermediate-Conductance Calcium-Activated Potassium ChannelsMaleMembrane PotentialsMolecular Sequence DataPatch-Clamp TechniquesPeptidesPotassiumPotassium ChannelsPotassium Channels, Calcium-ActivatedPotassium, DietaryRatsRats, Sprague-DawleyRubidium RadioisotopesConceptsChannel inhibitors clotrimazoleRat proximal colonProximal colonSK channel inhibitorsAddition of thapsigarginExpression of Ca2Muscarinic receptorsCholinergic agentsMuscarinic agonistsEpithelial stripsIKCa channelsMucosal additionSerosal surfaceColonic epitheliumIK channelsIntracellular Ca2Channel inhibitorsRSK4 mRNAColonWestern blottingIK proteinSecretionColonic cryptsPrecise mechanismConfocal immunofluorescence
2000
An electroneutral sodium/bicarbonate cotransporter NBCn1 and associated sodium channel
Choi I, Aalkjaer C, Boulpaep E, Boron W. An electroneutral sodium/bicarbonate cotransporter NBCn1 and associated sodium channel. Nature 2000, 405: 571-575. PMID: 10850716, DOI: 10.1038/35014615.Peer-Reviewed Original ResearchMeSH Keywords4,4'-Diisothiocyanostilbene-2,2'-Disulfonic AcidAnimalsBicarbonatesBiological TransportCarrier ProteinsChloridesCloning, OrganismDNA, ComplementaryElectrophysiologyHumansMolecular Sequence DataRatsRecombinant ProteinsReverse Transcriptase Polymerase Chain ReactionRNA, ComplementarySequence Homology, Amino AcidSodiumSodium ChannelsSodium-Bicarbonate SymportersXenopus
1999
Immunolocalization of the electrogenic Na+- HCO 3 − cotransporter in mammalian and amphibian kidney
Schmitt B, Biemesderfer D, Romero M, Boulpaep E, Boron W. Immunolocalization of the electrogenic Na+- HCO 3 − cotransporter in mammalian and amphibian kidney. American Journal Of Physiology 1999, 276: f27-f38. PMID: 9887077, DOI: 10.1152/ajprenal.1999.276.1.f27.Peer-Reviewed Original ResearchConceptsRat kidney NBCProximal tubulesDistal tubulesIndirect immunofluorescence microscopyEarly distal tubuleLate distal tubuleControl fusion proteinHCO-3 reabsorptionHCO-3 cotransporterRenal proximal tubulesBasolateral labelingImmunofluorescence microscopyRenal microsomesGuinea pigsRat kidneyHEK-293 cellsKidneyPreabsorption experimentsBasolateral stainingRabbit kidneyControl oocytesFusion proteinRatsProtein levelsNBC protein
1997
The electrogenic Na/HCO3 cotransporter.
Boron W, Fong P, Hediger M, Boulpaep E, Romero M. The electrogenic Na/HCO3 cotransporter. Wiener Klinische Wochenschrift 1997, 109: 445-56. PMID: 9261985.Peer-Reviewed Original ResearchConceptsElectrogenic Na/HCO3 cotransporterProximal tubulesHCO3- cotransporterRenal proximal tubulesCO2/10 mM HCO3HCO3- transportersRegulation of intracellularBasolateral membraneNumber of tissuesNative oocytesRapid hyperpolarizationXenopus laevis oocytesExtracellular ClBicarbonate cotransporterOocyte expressionCotransporterMM HCO3OocytesCell typesMost cellsMembrane potentialAmino acid homologySingle cloneWater-injected controlsTubules
1992
Mouse cortical collecting duct cells show nonselective cation channel activity and express a gene related to the cGMP-gated rod photoreceptor channel.
Ahmad I, Korbmacher C, Segal A, Cheung P, Boulpaep E, Barnstable C. Mouse cortical collecting duct cells show nonselective cation channel activity and express a gene related to the cGMP-gated rod photoreceptor channel. Proceedings Of The National Academy Of Sciences Of The United States Of America 1992, 89: 10262-10266. PMID: 1279673, PMCID: PMC50318, DOI: 10.1073/pnas.89.21.10262.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBase SequenceBlotting, NorthernCell LineCyclic GMPDNAIon Channel GatingIon ChannelsKidney CortexKidney Tubules, CollectingMembrane PotentialsMiceMolecular Sequence DataOligodeoxyribonucleotidesPhotoreceptor CellsPoly APolymerase Chain ReactionRatsRNARNA, MessengerSequence Homology, Nucleic AcidConceptsNonselective cation channelsPhotoreceptor channelDuct cellsCation channel probeCation channelsChannel activityPolymerase chain reactionNonselective cation channel activityCGMP decreaseCation channel activityChannel subunitsCytoplasmic applicationChain reactionRod photoreceptorsNorthern blot analysisRetinal cGMPBlot analysisCGMPRat kidney cDNA libraryChannel genesMiceSingle-channel conductanceOpen probabilityCellsCalcium removal
1989
MECHANISMS OF WATER TRANSPORT BY EPITHELIAL CELLS
Tripathi S, Boulpaep E. MECHANISMS OF WATER TRANSPORT BY EPITHELIAL CELLS. Quarterly Journal Of Experimental Physiology And Cognate Medical Sciences 1989, 74: 385-417. PMID: 2678220, DOI: 10.1113/expphysiol.1989.sp003288.Peer-Reviewed Original Research
1988
Glucocorticoids have a different action than aldosterone on target tissue
Halevy J, Boulpaep E, Budinger M, Binder H, Hayslett J. Glucocorticoids have a different action than aldosterone on target tissue. American Journal Of Physiology 1988, 254: f153-f158. PMID: 3337244, DOI: 10.1152/ajprenal.1988.254.1.f153.Peer-Reviewed Original ResearchConceptsRU 28362Same doseInhibitory actionDexamethasone-treated animalsBody wt-1Effects of glucocorticoidsEffect of dexamethasoneReceptor-independent actionsRat distal colonSodium channel blockersMarked inhibitory actionEquivalent short-circuit currentBasolateral potential differenceAldosterone receptorsEpithelial changesDistal colonChannel blockersAldosteroneSynthetic glucocorticoidDay 1WT-1Large intestineGlucocorticoidsEpithelial resistanceMarked inhibition
1987
Aldosterone increases the maximal turnover rate of the sodium pump
Halevy J, Boulpaep E, Binder H, Hayslett J. Aldosterone increases the maximal turnover rate of the sodium pump. Pflügers Archiv - European Journal Of Physiology 1987, 410: 476-480. PMID: 3432052, DOI: 10.1007/bf00586528.Peer-Reviewed Original ResearchConceptsSodium pumpSodium transportLow sodium dietEffects of aldosteroneAdministration of aldosteroneHigher plasma levelsIntact adrenal glandsRat distal colonEquivalent short-circuit currentAddition of nystatinH aldosteroneSodium dietAdrenal glandChronic conditionsPlasma levelsDistal colonAcute actionsAldosteroneUssing chambersHours of exposureChronic exposureSame time periodApical barrierSimilar changesMucosal solution
1984
Role of aldosterone in the mechanism of potassium adaptation in the initial collecting tubule
Hirsch D, Kashgarian M, Boulpaep E, Hayslett J. Role of aldosterone in the mechanism of potassium adaptation in the initial collecting tubule. Kidney International 1984, 26: 798-807. PMID: 6099857, DOI: 10.1038/ki.1984.221.Peer-Reviewed Original ResearchConceptsInitial collecting tubuleCollecting tubuleDistal convolutionAldosterone levelsPotassium adaptationChronic potassium loadingMineralocorticoid-sensitive tissuesRole of aldosteronePlasma aldosterone levelsAction of aldosteroneIntact adrenal glandsPotassium loadingPhysiological plasma levelsChronic hyperaldosteronismTransepithelial potential differenceChronic administrationEpithelial changesAdrenal glandPlasma levelsDietary potassium loadingBasal valuesAldosteroneTubule cellsNephron segmentsTarget tissues
1978
Factors influencing transepithelial potential difference in mammalian distal tubule
Hayslett J, Boulpaep E, Giebisch G. Factors influencing transepithelial potential difference in mammalian distal tubule. American Journal Of Physiology 1978, 234: f182-f191. PMID: 629352, DOI: 10.1152/ajprenal.1978.234.3.f182.Peer-Reviewed Original Research
1977
Electrical characteristics of the mammalian distal tubule: Comparison of Ling-Gerard and macroelectrodes
Hayslett J, Boulpaep E, Kashgarian M, Giebisch G. Electrical characteristics of the mammalian distal tubule: Comparison of Ling-Gerard and macroelectrodes. Kidney International 1977, 12: 324-331. PMID: 604621, DOI: 10.1038/ki.1977.119.Peer-Reviewed Original Research
1971
Electrolyte transport in kidney tubule cells
Giebisch G, Boulpaep E, Whittembury G. Electrolyte transport in kidney tubule cells. Philosophical Transactions Of The Royal Society B Biological Sciences 1971, 262: 175-196. PMID: 4399217, DOI: 10.1098/rstb.1971.0088.Peer-Reviewed Original ResearchConceptsTubule cellsTubular levelKidney tubule cellsNet Na transportActive K uptakePotassium secretionNa-K exchange pumpK secretionProximal tubular levelLuminal cell membraneElectrolyte transportNa pumpLines of evidenceTranstubular movementNa transportNet NaCell compartmentExchange pumpSecretionInterstitial fluidCellsLumenPassive leakIonic pumpsUptake