2022
Colonic Fluid and Electrolyte Transport 2022: An Update
Negussie AB, Dell AC, Davis BA, Geibel JP. Colonic Fluid and Electrolyte Transport 2022: An Update. Cells 2022, 11: 1712. PMID: 35626748, PMCID: PMC9139964, DOI: 10.3390/cells11101712.Peer-Reviewed Original ResearchMeSH KeywordsColonCystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorElectrolytesEpithelial Sodium ChannelsHumansMembrane Transport ProteinsConceptsCystic fibrosis transmembrane regulatorCell death regulationSignal transduction pathwaysDeath regulationNa-K-Cl cotransporterEpithelial cell deathTransduction pathwaysIon homeostasisRegulatory relationshipsIon transportersTransepithelial ion transportEpithelial sodium channelTransmembrane regulatorCell deathColonic epithelial cellsEpithelial cellsTransportersSodium channelsNa-H exchangerRegulationIon transportCancer pathologyPH modulationIon movementOsmotic gradient
2015
Nanoparticles that deliver triplex-forming peptide nucleic acid molecules correct F508del CFTR in airway epithelium
McNeer NA, Anandalingam K, Fields RJ, Caputo C, Kopic S, Gupta A, Quijano E, Polikoff L, Kong Y, Bahal R, Geibel JP, Glazer PM, Saltzman WM, Egan ME. Nanoparticles that deliver triplex-forming peptide nucleic acid molecules correct F508del CFTR in airway epithelium. Nature Communications 2015, 6: 6952. PMID: 25914116, PMCID: PMC4480796, DOI: 10.1038/ncomms7952.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell LineChloridesCystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorDNA-Binding ProteinsGenetic TherapyHigh-Throughput Nucleotide SequencingHumansLactic AcidMice, Inbred C57BLNanoparticlesPeptide Nucleic AcidsPolyglycolic AcidPolylactic Acid-Polyglycolic Acid CopolymerPolymersRespiratory MucosaConceptsFacile genome engineeringVivo gene deliveryBiodegradable polymer nanoparticlesTransient gene expressionNanoparticle systemsGene deliveryPolymer nanoparticlesGene correctionGenome engineeringNanoparticlesOff-target effectsPeptide nucleic acidLethal genetic disorderNucleic acidsDonor DNATarget effectsIntranasal deliveryDeliveryCystic fibrosisEngineeringOligonucleotideChloride effluxHuman cellsAirway epitheliumLung tissue
2013
Functional vacuolar ATPase (V-ATPase) proton pumps traffic to the enterocyte brush border membrane and require CFTR
Collaco AM, Geibel P, Lee BS, Geibel JP, Ameen NA. Functional vacuolar ATPase (V-ATPase) proton pumps traffic to the enterocyte brush border membrane and require CFTR. American Journal Of Physiology - Cell Physiology 2013, 305: c981-c996. PMID: 23986201, PMCID: PMC4109618, DOI: 10.1152/ajpcell.00067.2013.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCaco-2 CellsCystic Fibrosis Transmembrane Conductance RegulatorEnterocytesHumansMaleMiceMice, Inbred C57BLMice, KnockoutMicrovilliProtein TransportRatsRats, Sprague-DawleyVacuolar Proton-Translocating ATPasesConceptsV-ATPaseCystic fibrosis transmembrane conductance regulator (CFTR) channelV-ATPase complexV-ATPase functionBrush border membraneProton effluxRat Brunner's glandsIntestinal cellsCAMP/PKACaco-2BBe cellsBorder membraneApical domainCoimmunoprecipitation studiesCFTR distributionVacuolar ATPasesSubapical cytoplasmSpecific subunitsCAMP stimulationProton pumpCAMP treatmentEnterocyte brush border membraneSodium-hydrogen exchangerHydrogen exchangerApical membraneCFTRActivation of AMPK Inhibits Cholera Toxin Stimulated Chloride Secretion in Human and Murine Intestine
Rogers AC, Huetter L, Hoekstra N, Collins D, Collaco A, Baird AW, Winter DC, Ameen N, Geibel JP, Kopic S. Activation of AMPK Inhibits Cholera Toxin Stimulated Chloride Secretion in Human and Murine Intestine. PLOS ONE 2013, 8: e69050. PMID: 23935921, PMCID: PMC3728293, DOI: 10.1371/journal.pone.0069050.Peer-Reviewed Original ResearchMeSH KeywordsAMP-Activated Protein KinasesAnimalsChloridesCholera ToxinCystic Fibrosis Transmembrane Conductance RegulatorEnzyme ActivationHumansIn Vitro TechniquesIntestinal MucosaIntestinesMaleMicePhosphorylationRatsConceptsIntestinal chloride secretionCholera toxinChloride secretionPharmacological activationFluid accumulationColonic cryptsSupplemental treatment strategyAcute diarrheal illnessChloride effluxCystic fibrosis transmembrane conductance regulatorExcised intestinal segmentsRat colonic cryptsMurine colonic mucosaMucosal sheetsDiarrheal illnessIntestinal loopsEnterotoxigenic diarrheaColonic mucosaTreatment strategiesIntestinal segmentsUssing chambersAMPK activator AICARMurine intestineTissue levelsMetformin
2011
Hypoxia Inhibits Colonic Ion Transport via Activation of AMP Kinase
Collins D, Kopic S, Bachlechner J, Ritter M, Winter DC, Geibel JP. Hypoxia Inhibits Colonic Ion Transport via Activation of AMP Kinase. Annals Of Surgery 2011, 254: 957-963. PMID: 21562404, DOI: 10.1097/sla.0b013e31821d477f.Peer-Reviewed Original ResearchMeSH KeywordsAMP-Activated Protein KinasesAnimalsCell HypoxiaChloride ChannelsChloridesColonCystic Fibrosis Transmembrane Conductance RegulatorHumansIntestinal MucosaIschemiaMaleMembrane PotentialsMicroscopy, FluorescenceRatsRats, Sprague-DawleyConceptsCystic fibrosis transmembrane conductance regulatorChloride secretionMucosal hypoxiaAcute hypoxiaColonic electrolyte transportColonic mucosal functionIschemic intestinal injuryElectrogenic chloride secretionColonic ion transportPotential therapeutic targetHuman colonic mucosaIntracellular chloride concentrationRat colonic cryptsEpithelial ion transportFibrosis transmembrane conductance regulatorIschemic colitisIntestinal injuryColonic obstructionInhibition of CFTRMucosal functionAnastomotic failureAcute effectsColonic mucosaAdaptive cellular responseTransmembrane conductance regulatorCalcium-Modulated Chloride Pathways Contribute to Chloride Flux in Murine Cystic Fibrosis-Affected Macrophages
Shenoy A, Kopic S, Murek M, Caputo C, Geibel JP, Egan ME. Calcium-Modulated Chloride Pathways Contribute to Chloride Flux in Murine Cystic Fibrosis-Affected Macrophages. Pediatric Research 2011, 70: 447-452. PMID: 21796019, PMCID: PMC3189336, DOI: 10.1203/pdr.0b013e31822f2448.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCalciumCarbacholChloridesCystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorFluorescent DyesMacrophagesMiceQuinolinium CompoundsThapsigarginConceptsCystic fibrosisWT macrophagesCF macrophagesExtracellular Ca2CAMP-activated chloride channelCystic fibrosis transmembrane conductance regulator (CFTR) proteinContribution of CFTRIon transport abnormalitiesResult of mutationsContribution of calciumRegulator proteinRobust inflammationChronic infectionMacrophage dysfunctionMacrophage functionIntracellular Ca2Transport abnormalitiesMacrophagesChloride channelsMethoxy-quinolinium bromideCFTRinh-172Fluorescent indicator dyesFibrosisPathwayCFTR
2010
Toxin Mediated Diarrhea in the 21st Century: The Pathophysiology of Intestinal Ion Transport in the Course of ETEC, V. cholerae and Rotavirus Infection
Kopic S, Geibel JP. Toxin Mediated Diarrhea in the 21st Century: The Pathophysiology of Intestinal Ion Transport in the Course of ETEC, V. cholerae and Rotavirus Infection. Toxins 2010, 2: 2132-2157. PMID: 22069677, PMCID: PMC3153279, DOI: 10.3390/toxins2082132.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCholera ToxinCystic Fibrosis Transmembrane Conductance RegulatorDiarrheaEnterocytesEnterotoxigenic Escherichia coliHumansIntestinal AbsorptionIntestinal MucosaIon TransportRotavirus InfectionsConceptsEpisodes of diarrheaIntestinal ion transportSpecific therapeutic approachesMajor healthcare concernRotavirus infectionTherapeutic approachesV. choleraeCommon enterotoxinInfectious agentsPathophysiological processesInfectious diseasesDiarrheaHealthcare concernCellular mechanismsLethal effectsPathophysiologyYearsInfectionCholeraeRotavirusDiseaseETECEvidence for intestinal chloride secretion
Murek M, Kopic S, Geibel J. Evidence for intestinal chloride secretion. Quarterly Journal Of Experimental Physiology And Cognate Medical Sciences 2010, 95: 471-478. PMID: 20233891, DOI: 10.1113/expphysiol.2009.049445.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsChloride ChannelsChloridesCLC-2 Chloride ChannelsCystic Fibrosis Transmembrane Conductance RegulatorDiarrheaEnterocytesHumansIntestinal AbsorptionIntestinal MucosaIntestinal SecretionsPotassium ChannelsSodium-Potassium-Chloride SymportersSodium-Potassium-Exchanging ATPaseTight JunctionsWater-Electrolyte BalanceCommentary on ‘Diarrhoeal disease through enterocyte secretion: a doctrine untroubled by proof’
Kopic S, Murek M, Geibel JP. Commentary on ‘Diarrhoeal disease through enterocyte secretion: a doctrine untroubled by proof’. Quarterly Journal Of Experimental Physiology And Cognate Medical Sciences 2010, 95: 484-485. PMID: 20233894, DOI: 10.1113/expphysiol.2009.051912.Peer-Reviewed Original ResearchAnimalsBacterial ToxinsChloridesCystic Fibrosis Transmembrane Conductance RegulatorDiarrheaEnterotoxinsEscherichia coli ProteinsHumansIntestinal MucosaIntestines
2006
ΔF508 Mutation Results in Impaired Gastric Acid Secretion*
Sidani SM, Kirchhoff P, Socrates T, Stelter L, Ferreira E, Caputo C, Roberts KE, Bell RL, Egan ME, Geibel JP. ΔF508 Mutation Results in Impaired Gastric Acid Secretion*. Journal Of Biological Chemistry 2006, 282: 6068-6074. PMID: 17178714, DOI: 10.1074/jbc.m608427200.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsATP-Binding Cassette TransportersCystic Fibrosis Transmembrane Conductance RegulatorGastric AcidGastric MucosaMiceMice, Mutant StrainsMice, TransgenicMutationPotassium ChannelsPotassium Channels, Inwardly RectifyingReceptors, DrugStomachSulfonylurea ReceptorsConceptsCystic fibrosis transmembrane conductance regulatorATP-binding cassette (ABC) transportersFibrosis transmembrane conductance regulatorTransmembrane conductance regulatorMouse gastric glandsParietal cellsMultifunctional proteinCFTR proteinRegulatory proteinsTransport proteinsCassette transportersConductance regulatorRegulatory roleApical poleSecretagogue-induced acid secretionGland lumenGastric glandsSulfonylurea receptorProteinImpaired gastric acid secretionK-ATPaseCl(-) secretionImmunofluorescent localizationCl- channelsATP-sensitive potassium channels
2002
Calcium-pump inhibitors induce functional surface expression of ΔF508-CFTR protein in cystic fibrosis epithelial cells
Egan ME, Glöckner-Pagel J, Ambrose C, Cahill PA, Pappoe L, Balamuth N, Cho E, Canny S, Wagner CA, Geibel J, Caplan MJ. Calcium-pump inhibitors induce functional surface expression of ΔF508-CFTR protein in cystic fibrosis epithelial cells. Nature Medicine 2002, 8: 485-492. PMID: 11984593, DOI: 10.1038/nm0502-485.Peer-Reviewed Original ResearchMeSH KeywordsAmilorideCalcium Channel BlockersCell MembraneCells, CulturedCystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorEpithelial CellsGene Expression RegulationHumansIsoproterenolPatch-Clamp TechniquesSequence DeletionThapsigarginConceptsEndoplasmic reticulumCalcium pump inhibitorΔF508-CFTR proteinCystic fibrosis epithelial cellsCystic fibrosis transmembrane conductance regulator (CFTR) proteinCystic fibrosis cell lineFunctional surface expressionSurface expressionChaperone activityChaperone proteinsRegulator proteinPlasma membraneCystic fibrosis defectCell surfaceProteinCell linesPotential targetOptimal activityInhibitor thapsigarginEpithelial cellsExpressionCommon mutationsInhibitorsMouse modelReticulum
2001
Effects of the Serine/Threonine Kinase SGK1 on the Epithelial Na+ Channel (ENaC) and CFTR: Implications for Cystic Fibrosis
Wagner C, Ott M, Klingel K, Beck S, Melzig J, Friedrich B, Wild K, Bröer S, Moschen I, Albers A, Waldegger S, Tümmler B, Egan M, Geibel J, Kandolf R, Lang F. Effects of the Serine/Threonine Kinase SGK1 on the Epithelial Na+ Channel (ENaC) and CFTR: Implications for Cystic Fibrosis. Cellular Physiology And Biochemistry 2001, 11: 209-218. PMID: 11509829, DOI: 10.1159/000051935.Peer-Reviewed Original ResearchMeSH Keywords1-Methyl-3-isobutylxanthineAmino Acid SubstitutionAnimalsBronchiCell LineCystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorEpithelial CellsEpithelial Sodium ChannelsHumansIn Situ HybridizationLungMacrophages, AlveolarMutationOocytesPatch-Clamp TechniquesProtein Serine-Threonine KinasesPulmonary AlveoliRNA, ComplementaryRNA, MessengerSodiumSodium ChannelsXenopus laevisConceptsSerine/threonine kinase SGK1Lung tissueCystic fibrosisCF patientsKinase SGK1CF lung tissueXenopus oocytesLoss of CFTRLung epithelial cell lineCoexpression of CFTREffect of SGK1Pathophysiological factorsEpithelial cell lineRespiratory epitheliumLung phenotypeVariety of stimuliCl(-) secretionSGK1 expressionInhibitor amilorideInhibitory effectEpithelial cellsEnhanced expressionChannel ENaC.CFTR mutationsChannel activity
1999
Continuous detection of extracellular ATP on living cells by using atomic force microscopy
Schneider S, Egan M, Jena B, Guggino W, Oberleithner H, Geibel J. Continuous detection of extracellular ATP on living cells by using atomic force microscopy. Proceedings Of The National Academy Of Sciences Of The United States Of America 1999, 96: 12180-12185. PMID: 10518596, PMCID: PMC18432, DOI: 10.1073/pnas.96.21.12180.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphateCell LineCystic Fibrosis Transmembrane Conductance RegulatorEpithelial CellsHumansMicroscopy, Atomic ForceTime FactorsConceptsAtomic force microscopyForce microscopyLiving cellsImportant compoundsSurface of cellsATP concentrationSurface microenvironmentScanning tipExtracellular ATPCell linesMicroscopyPhysiological conditionsPowerful techniqueCellsContinuous detectionBiosensorSurfaceCompoundsActive tipATPConcentrationFuture developmentSoftnessDetectionMicroenvironment