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
2007
Differential regulation of cholera toxin-inhibited Na-H exchange isoforms by butyrate in rat ileum
Subramanya SB, Rajendran VM, Srinivasan P, Kumar N, Ramakrishna BS, Binder HJ. Differential regulation of cholera toxin-inhibited Na-H exchange isoforms by butyrate in rat ileum. AJP Gastrointestinal And Liver Physiology 2007, 293: g857-g863. PMID: 17690171, DOI: 10.1152/ajpgi.00462.2006.Peer-Reviewed Original Research
2004
Zinc inhibits cAMP-stimulated Cl secretion via basolateral K-channel blockade in rat ileum
Hoque KM, Rajendran VM, Binder HJ. Zinc inhibits cAMP-stimulated Cl secretion via basolateral K-channel blockade in rat ileum. AJP Gastrointestinal And Liver Physiology 2004, 288: g956-g963. PMID: 15618279, DOI: 10.1152/ajpgi.00441.2004.Peer-Reviewed Original ResearchMeSH Keywords8-Bromo Cyclic Adenosine MonophosphateAnimalsBariumCarbacholChloridesColforsinCyclic AMPDiarrheaEnterocytesIleumMaleMembrane GlycoproteinsMonosaccharide Transport ProteinsPotassium ChannelsRatsRats, Sprague-DawleySodiumSodium-Glucose Transporter 1Sodium-Potassium-Chloride SymportersSolute Carrier Family 12, Member 2Time FactorsZincConceptsCl(-) secretionRat ileumNa absorptionK channel blockadeBumetanide-sensitive 86Rb uptakeK channelsPresence of ouabainHalf maximal inhibitory concentrationNa-K-ATPaseAcute diarrheaStool outputCAMP-induced Cl- secretionMucosal additionMuscle layerAnion secretionLucite chamberCotransport activitySecretionClamp methodInhibitory concentrationDiarrheaCyclic monophosphateIleumEfflux experimentsSerosalThree distinct mechanisms of HCO3− secretion in rat distal colon
Vidyasagar S, Rajendran VM, Binder HJ. Three distinct mechanisms of HCO3− secretion in rat distal colon. American Journal Of Physiology - Cell Physiology 2004, 287: c612-c621. PMID: 15308466, DOI: 10.1152/ajpcell.00474.2003.Peer-Reviewed Original ResearchConceptsRat distal colonShort-chain fatty acidsColonic mucosaDistal colonRat distal colonic mucosaDistal colonic mucosaCl- channel blockerSCFA/Channel blockersSerosal layerCrypt cellsCFTR blockerMicroM DIDSApical membrane anion channelApical membraneSecretionDependent secretionColonLumen ClSecretory mechanismMammalian colonBlockersMucosaStat techniqueDIDS
2003
Apical NHE isoforms differentially regulate butyrate-stimulated Na absorption in rat distal colon
Krishnan S, Rajendran VM, Binder HJ. Apical NHE isoforms differentially regulate butyrate-stimulated Na absorption in rat distal colon. American Journal Of Physiology - Cell Physiology 2003, 285: c1246-c1254. PMID: 12878493, DOI: 10.1152/ajpcell.00598.2002.Peer-Reviewed Original Research
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 uptakeMorphology of Isolated Colonic Crypts
Robert M, Singh S, Ikuma M, Jain D, Ardito T, Binder H. Morphology of Isolated Colonic Crypts. Cells Tissues Organs 2001, 168: 246-251. PMID: 11275691, DOI: 10.1159/000047841.Peer-Reviewed Original ResearchNa+-dependent fluid absorption in intact perfused rat colonic crypts
Geibel J, Rajendran V, Binder H. Na+-dependent fluid absorption in intact perfused rat colonic crypts. Gastroenterology 2001, 120: 144-150. PMID: 11208723, DOI: 10.1053/gast.2001.20890.Peer-Reviewed Original ResearchMeSH Keywords4,4'-Diisothiocyanostilbene-2,2'-Disulfonic AcidAnimalsBicarbonatesChloridesColonGanglionic StimulantsGlutamatesIn Vitro TechniquesIntestinal AbsorptionInulinIsotonic SolutionsMalePerfusionQuaternary Ammonium CompoundsRatsRats, Sprague-DawleyRinger's SolutionSodiumSodium-Hydrogen ExchangersTritiumConceptsNet fluid absorptionRat colonic cryptsCl- channel blockerFluid absorptionNeurohumoral stimulationChannel blockersColonic cryptsLumen ClAbsorptive processesInhibitor of NaCl(-) secretionAbstractTextCrypt cellsExchange inhibitorMicroperfusion techniqueFluid secretionL DIDSAmiloride analoguesMammalian colonSecretionAnion exchange inhibitorCryptsSignificant increaseAIMSSecretory process
2000
Regulation of DRA and AE1 in rat colon by dietary Na depletion
Rajendran V, Black J, Ardito T, Sangan P, Alper S, Schweinfest C, Kashgarian M, Binder H. Regulation of DRA and AE1 in rat colon by dietary Na depletion. AJP Gastrointestinal And Liver Physiology 2000, 279: g931-g942. PMID: 11052990, DOI: 10.1152/ajpgi.2000.279.5.g931.Peer-Reviewed Original ResearchBasolateral 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 colonCDNAKCC1Ouabain-sensitive H,K-ATPase Functions as Na,K-ATPase in Apical Membranes of Rat Distal Colon*
Rajendran V, Sangan P, Geibel J, Binder H. Ouabain-sensitive H,K-ATPase Functions as Na,K-ATPase in Apical Membranes of Rat Distal Colon*. Journal Of Biological Chemistry 2000, 275: 13035-13040. PMID: 10777607, DOI: 10.1074/jbc.275.17.13035.Peer-Reviewed Original Research
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 ResearchDifferential regulation of NHE isoforms by sodium depletion in proximal and distal segments of rat colon
Ikuma M, Kashgarian M, Binder H, Rajendran V. Differential regulation of NHE isoforms by sodium depletion in proximal and distal segments of rat colon. American Journal Of Physiology 1999, 276: g539-g549. PMID: 9950829, DOI: 10.1152/ajpgi.1999.276.2.g539.Peer-Reviewed Original ResearchConceptsDietary sodium depletionSodium depletionDistal colonRat colonProtein expressionMRNA abundanceBlot analysisDose-dependent inhibitorApical membrane vesiclesElectroneutral NaCl absorptionWestern blot analysisDifferential regulationNormal ratsProximal colonHOE 694Multiple diverse effectsColonDistal segmentsNaCl absorptionNHE isoformsExchange activityExchanger isoformsNorthern blot analysisDifferential effectsPretranslational levelRole 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
1998
Role of Apical H-K Exchange and Basolateral K Channel in the Regulation of Intracellular pH in Rat Distal Colon Crypt Cells
Ikuma M, Binder H, Geibel J. Role of Apical H-K Exchange and Basolateral K Channel in the Regulation of Intracellular pH in Rat Distal Colon Crypt Cells. The Journal Of Membrane Biology 1998, 166: 205-212. PMID: 9843594, DOI: 10.1007/s002329900462.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntiportersBariumCell PolarityColonEpithelial CellsH(+)-K(+)-Exchanging ATPaseHomeostasisHydrogen-Ion ConcentrationIntestinal MucosaIntracellular FluidIon TransportMaleOuabainPotassiumPotassium ChannelsPotassium-Hydrogen AntiportersRatsRats, Sprague-DawleySodium-Potassium-Exchanging ATPaseDifferential localization of colonic H+-K+-ATPase isoforms in surface and crypt cells
Rajendran V, Singh S, Geibel J, Binder H. Differential localization of colonic H+-K+-ATPase isoforms in surface and crypt cells. American Journal Of Physiology 1998, 274: g424-g429. PMID: 9486199, DOI: 10.1152/ajpgi.1998.274.2.g424.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBariumColonH(+)-K(+)-Exchanging ATPaseHydrogen-Ion ConcentrationIsoenzymesMaleOuabainPotassiumRatsRats, Sprague-DawleySurface PropertiesConceptsCrypt cellsColonic cryptsRat distal colonSurface cellsSurface epithelial cellsATPase isoformsOuabain-insensitive componentApical membraneDistal colonAcid loadDependent intracellularEpithelial cellsATPase activityCryptsDifferential localizationOuabainATPase alpha subunitCellsAlpha subunitCompelling evidenceIsoformsColonActivityRecovery
1997
Regulation of colonic H-K-ATPase in large intestine and kidney by dietary Na depletion and dietary K depletion
Sangan P, Rajendran V, Mann A, Kashgarian M, Binder H. Regulation of colonic H-K-ATPase in large intestine and kidney by dietary Na depletion and dietary K depletion. American Journal Of Physiology 1997, 272: c685-c696. PMID: 9124313, DOI: 10.1152/ajpcell.1997.272.2.c685.Peer-Reviewed Original ResearchConceptsDietary K depletionDistal colonNA depletionK-ATPase activityProximal colonLarge intestineRat distal colonActive K absorptionK-ATPaseRenal collecting ductsDietary NaK-ATPase expressionK-ATPase isoformsK depletionRat colonCollecting ductsOuter medullaColonProtein expressionProtein levelsKidneyPolyclonal antibodiesIntestineDuctMRNA
1995
Fluid absorption in isolated perfused colonic crypts.
Singh S, Binder H, Boron W, Geibel J. Fluid absorption in isolated perfused colonic crypts. Journal Of Clinical Investigation 1995, 96: 2373-2379. PMID: 7593625, PMCID: PMC185889, DOI: 10.1172/jci118294.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell PolarityColonCyclic AMPIn Vitro TechniquesIntestinal AbsorptionIntestinal MucosaMalePerfusionRatsRats, Sprague-DawleyConceptsCrypt cellsNM vasoactive intestinal peptideFluid absorptionLarge intestinal functionColonic cryptsVasoactive intestinal peptideLamina propria cellsNet fluid secretionRat distal colonNet fluid absorptionDibutyryl cyclic AMPIntestinal peptideDistal colonIntestinal functionLamina propriaPathophysiological paradigmCrypt preparationMM acetylcholineBasal stateNeurohumoral agonistsFluid secretionCellular elementsEpithelial cellsIntestinal cryptsCryptsChloride-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