2013
Identification of Functionally Distinct Na-HCO3 Co-Transporters in Colon
Barmeyer C, Ye JH, Soroka C, Geibel P, Hingsammer LM, Weitgasser L, Atway D, Geibel JP, Binder HJ, Rajendran VM. Identification of Functionally Distinct Na-HCO3 Co-Transporters in Colon. PLOS ONE 2013, 8: e62864. PMID: 23690961, PMCID: PMC3653958, DOI: 10.1371/journal.pone.0062864.Peer-Reviewed Original ResearchConceptsNa-HCO3 cotransportDistal colonProximal colonNBC activityNBC isoformsRat colonColonic epithelial cellsCrypt glandsSensitive transporterHCO3- secretionColonHCO3-dependent mechanismEpithelial cellsSaturable processHOE694Isoform 1Basolateral membraneCotransportPCR analysisNorthern blotDIDSMolecular studiesMolecular identityApparent KiCritical role
2001
Characterization of apical membrane Cl-dependent Na/H exchange in crypt cells of rat distal colon
Rajendran V, Geibel J, Binder H. Characterization of apical membrane Cl-dependent Na/H exchange in crypt cells of rat distal colon. AJP Gastrointestinal And Liver Physiology 2001, 280: g400-g405. PMID: 11171622, DOI: 10.1152/ajpgi.2001.280.3.g400.Peer-Reviewed Original ResearchConceptsRat distal colonNa/H exchangeCl- channel blockerDistal colonChannel blockersCrypt cellsIntracellular pH recoveryExchange inhibitor amilorideColonic epithelial cellsApical membrane vesiclesCrypt glandsHigh doseHOE 694NA depletionAcid loadExchange inhibitorInhibitor amiloridePH recoveryEpithelial cellsUptake 1NHE isoformsAnion exchange inhibitorBlockersColonNa uptake
2000
Basolateral K-Cl Cotransporter Regulates Colonic Potassium Absorption in Potassium Depletion*
Sangan P, Brill S, Sangan S, Forbush B, Binder H. Basolateral K-Cl Cotransporter Regulates Colonic Potassium Absorption in Potassium Depletion*. Journal Of Biological Chemistry 2000, 275: 30813-30816. PMID: 10878016, DOI: 10.1074/jbc.m003931200.Peer-Reviewed Original ResearchConceptsK-Cl cotransporterMembrane HK-Cl cotransportActive potassium absorptionProtein expressionBasolateral membranePotassium absorptionK-ATPaseNorthern blot analysisKCC1 mRNACoordinated regulationAlpha-subunit mRNABeta-subunit mRNAMRNA abundanceBlot analysisMRNAExpressionProteinMembraneCotransporterDepletionRat distal colonCDNAKCC1
1999
Colonic H-K-ATPase β-subunit: identification in apical membranes and regulation by dietary K depletion
Sangan P, Kolla S, Rajendran V, Kashgarian M, Binder H. Colonic H-K-ATPase β-subunit: identification in apical membranes and regulation by dietary K depletion. American Journal Of Physiology 1999, 276: c350-c360. PMID: 9950762, DOI: 10.1152/ajpcell.1999.276.2.c350.Peer-Reviewed Original ResearchRole of Cl channels in Cl-dependent Na/H exchange
Rajendran V, Geibel J, Binder H. Role of Cl channels in Cl-dependent Na/H exchange. American Journal Of Physiology 1999, 276: g73-g78. PMID: 9886981, DOI: 10.1152/ajpgi.1999.276.1.g73.Peer-Reviewed Original ResearchConceptsNa/H exchangeCl- channel blockerChannel blockersMicroM DIDSNa/H exchange activityCystic fibrosis transmembrane conductance regulatorIntracellular pH recoveryRat distal colonCl- channelsH exchange activityDistal colonCrypt lumenCrypt cellsAcid loadExchange inhibitorApical membranePH recoveryCl(-) dependenceAnion exchange inhibitorCl- channel activityChannel activityBlockersH exchangePolyclonal antibodiesCl- conductanceDistribution and regulation of apical Cl/anion exchanges in surface and crypt cells of rat distal colon
Rajendran V, Binder H. Distribution and regulation of apical Cl/anion exchanges in surface and crypt cells of rat distal colon. American Journal Of Physiology 1999, 276: g132-g137. PMID: 9886988, DOI: 10.1152/ajpgi.1999.276.1.g132.Peer-Reviewed Original Research
1995
Chloride-dependent Na-H Exchange A NOVEL MECHANISM OF SODIUM TRANSPORT IN COLONIC CRYPTS*
Rajendran V, Geibel J, Binder H. Chloride-dependent Na-H Exchange A NOVEL MECHANISM OF SODIUM TRANSPORT IN COLONIC CRYPTS*. Journal Of Biological Chemistry 1995, 270: 11051-11054. PMID: 7744735, DOI: 10.1074/jbc.270.19.11051.Peer-Reviewed Original ResearchConceptsNa-H exchangeColonic crypt cellsCrypt cellsAcid loadRat distal colonApical membrane vesiclesNovel transport processRate of intracellularDistal colonMM amilorideSodium transportApical membraneGradient stimulationColonic cryptsAmiloride inhibitionSodium movementNovel mechanismOutward gradientCompelling evidenceCellsSodiumUptakePrior studiesColonRecovery
1994
Apical membrane Cl-butyrate exchange: Mechanism of short chain fatty acid stimulation of active chloride absorption in rat distal colon
Rajendran V, Binder H. Apical membrane Cl-butyrate exchange: Mechanism of short chain fatty acid stimulation of active chloride absorption in rat distal colon. The Journal Of Membrane Biology 1994, 141: 51-58. PMID: 7966245, DOI: 10.1007/bf00232873.Peer-Reviewed Original ResearchConceptsRat distal colonFatty acid stimulationDistal colonShort-chain fatty acidsNa-H exchangeActive chloride absorptionHalf maximal inhibitory concentrationAcid stimulationApical membrane vesiclesChain fatty acidsChloride absorptionFatty acid exchangeCl- gradientInhibitory concentrationOutward Cl gradientButyrate concentrationExtravesicular ClColonCellular modelMembrane vesiclesFatty acidsStimulationFunctional NaDisulfonic acidCompelling evidenceDifferential modulation of Na-HCO3 cotransport and Na-H exchange by pH in basolateral membrane vesicles of rat distal colon.
Rajendran V, Binder H. Differential modulation of Na-HCO3 cotransport and Na-H exchange by pH in basolateral membrane vesicles of rat distal colon. Journal Of Biological Chemistry 1994, 269: 156-160. PMID: 8276790, DOI: 10.1016/s0021-9258(17)42328-3.Peer-Reviewed Original ResearchConceptsMembrane vesiclesDifferent cellular functionsBasolateral membrane vesiclesProton concentration gradientCellular functionsIntravesicular protonsApparent KmVesiclesTransport systemNa-H exchangeCotransportDifferential modulationHigh proton concentrationProton concentrationProton stimulationNa-HCO3 cotransportConcentration gradientKmRat distal colonProteinSeparate mechanismsVmax
1993
Cl-HCO3 and Cl-OH exchanges mediate Cl uptake in apical membrane vesicles of rat distal colon
Rajendran V, Binder H. Cl-HCO3 and Cl-OH exchanges mediate Cl uptake in apical membrane vesicles of rat distal colon. American Journal Of Physiology 1993, 264: g874-g879. PMID: 8498514, DOI: 10.1152/ajpgi.1993.264.5.g874.Peer-Reviewed Original ResearchMeSH Keywords4,4'-Diisothiocyanostilbene-2,2'-Disulfonic Acid4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic AcidAmilorideAnimalsBicarbonatesBiological TransportBumetanideCarrier ProteinsCell MembraneChloride-Bicarbonate AntiportersChloridesColonDose-Response Relationship, DrugHydrogen-Ion ConcentrationKineticsMembrane ProteinsOxalatesRatsRats, Sprague-Dawley
1991
Apical membrane localization of ouabain-sensitive K(+)-activated ATPase activities in rat distal colon
Del Castillo J, Rajendran V, Binder H. Apical membrane localization of ouabain-sensitive K(+)-activated ATPase activities in rat distal colon. American Journal Of Physiology 1991, 261: g1005-g1011. PMID: 1837421, DOI: 10.1152/ajpgi.1991.261.6.g1005.Peer-Reviewed Original ResearchConceptsRat distal colonOuabain-insensitive fractionDistal colonOuabain-sensitive fractionOuabain-insensitive componentHalf-maximal concentrationApical membraneATPase activityColonic mucosaProximal colonColonActivation curveAbsorptive processesAdenosinetriphosphatase activityApical membrane localizationBasolateral membraneHomogenatesN-ethylmaleimideMucosaActivityOmeprazoleMechanism of short-chain fatty acid uptake by apical membrane vesicles of rat distal colon
Mascolo N, Rajendran V, Binder H. Mechanism of short-chain fatty acid uptake by apical membrane vesicles of rat distal colon. Gastroenterology 1991, 101: 331-338. PMID: 2065907, DOI: 10.1016/0016-5085(91)90008-9.Peer-Reviewed Original ResearchMeSH Keywords4,4'-Diisothiocyanostilbene-2,2'-Disulfonic Acid4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic AcidAnimalsAnionsBicarbonatesBiological Transport, ActiveButyratesButyric AcidCell MembraneColonFatty Acids, VolatileHydrogen-Ion ConcentrationIn Vitro TechniquesIntestinal AbsorptionRatsRats, Inbred Strains
1990
Characterization of Na-H exchange in apical membrane vesicles of rat colon.
Rajendran V, Binder H. Characterization of Na-H exchange in apical membrane vesicles of rat colon. Journal Of Biological Chemistry 1990, 265: 8408-8414. PMID: 2160456, DOI: 10.1016/s0021-9258(19)38902-1.Peer-Reviewed Original Research
1989
Aldosterone induction of electrogenic sodium transport in the apical membrane vesicles of rat distal colon*
Rajendran V, Kashgarian M, Binder H. Aldosterone induction of electrogenic sodium transport in the apical membrane vesicles of rat distal colon*. Journal Of Biological Chemistry 1989, 264: 18638-18644. PMID: 2553716, DOI: 10.1016/s0021-9258(18)51514-3.Peer-Reviewed Original ResearchConceptsDistal colonRat distal colonNa-H exchangeElectrogenic sodium transportSodium transportExperimental ratsMicroM amilorideAmiloride-sensitive electrogenic sodium transportNormal rat distal colonEffects of aldosteroneElectroneutral sodium absorptionSodium concentrationApical membrane vesiclesAnalogues of amilorideVoltage-clamp conditionsDietary sodiumNormal ratsAldosterone inductionSodium absorptionColonComparable inhibitionRatsAmilorideAldosteronePotent inhibitorCharacterization of aldosterone-induced potassium secretion in rat distal colon.
Sweiry J, Binder H. Characterization of aldosterone-induced potassium secretion in rat distal colon. Journal Of Clinical Investigation 1989, 83: 844-851. PMID: 2921323, PMCID: PMC303757, DOI: 10.1172/jci113967.Peer-Reviewed Original Research
1985
The electrical basis for enhanced potassium secretion in rat distal colon during dietary potassium loading
Sandle G, Foster E, Lewis S, Binder H, Hayslett J. The electrical basis for enhanced potassium secretion in rat distal colon during dietary potassium loading. Pflügers Archiv - European Journal Of Physiology 1985, 403: 433-439. PMID: 2409517, DOI: 10.1007/bf00589258.Peer-Reviewed Original ResearchConceptsRat distal colonDistal colonPotassium secretionDietary potassium loadingPotassium channel blocker tetraethylammonium chlorideBasolateral membrane voltageChannel blocker tetraethylammonium chloridePotassium loadingSodium channel blocker amilorideActive potassium secretionElectrical basisEnhanced potassium secretionChannel blocker amilorideMembrane conductanceIntracellular potassium activityApical membrane resistanceMucosal additionPotassium-selective microelectrodesBasal conditionsControl tissuesTransepithelial voltageColonMembrane voltageSecretionTetraethylammonium chloride
1982
Mechanism of potassium adaptation
Hayslett J, Binder H. Mechanism of potassium adaptation. American Journal Of Physiology 1982, 243: f103-f112. PMID: 7051849, DOI: 10.1152/ajprenal.1982.243.2.f103.Peer-Reviewed Original ResearchConceptsPotassium secretionPotassium adaptationChronic renal insufficiencyNa-K-ATPase activityAdministration of glucocorticoidsPotassium loadingNa-K-ATPaseTransepithelial potential differenceRenal insufficiencyPotassium excretionColonic mucosaExcretory loadDietary potassium loadingDistal nephronLarge intestinePotassium homeostasisDietary loadingElevated levelsPotassium pumpBasolateral portionEpitheliumCellular changesDistal portionSecretionBasolateral cell membrane
1980
Amplification of cell membrane surface in potassium adaptation.
Kashgarian M, Taylor C, Binder H, Hayslett J. Amplification of cell membrane surface in potassium adaptation. Laboratory Investigation 1980, 42: 581-8. PMID: 6248685.Peer-Reviewed Original Research