Tight JunctionsPermeabilityCell Membrane PermeabilityClaudinsOccludinZonula Occludens-1 ProteinElectric ImpedanceClaudin-4Capillary PermeabilityMannitolClaudin-1Claudin-3Claudin-5Tight Junction ProteinsCaco-2 CellsIntercellular JunctionsEpithelial CellsMembrane ProteinsIntestinal MucosaZonula Occludens-2 ProteinEpitheliumJunctional Adhesion MoleculesAdherens JunctionsBlood-Brain BarrierMARVEL Domain Containing 2 ProteinDiffusion Chambers, CultureDextransIntestinal AbsorptionLLC-PK1 CellsDogsFluorescein-5-isothiocyanateBiological TransportBacterial TranslocationBlood-Retinal BarrierHorseradish PeroxidasePhosphoproteinsFreeze FracturingCell LineCells, CulturedKidney Tubules, ProximalColonJejunumChloridesIntestinesSodiumCadherinsMyosin-Light-Chain KinaseEndothelium, VascularCell PolarityEnterocytesUrotheliumMicroscopy, ElectronOpossumsElectric ConductivityEndothelial CellsMyosin Light ChainsCalciumActinsMicroscopy, ConfocalEnzyme InhibitorsRespiratory MucosaBlotting, WesternPhosphorylationRats, Sprague-DawleySignal TransductionTime FactorsKidneyLoop of HenleMicroscopy, FluorescenceSwineCell MembraneSerous MembraneLactuloseRats, WistarWaterCytoskeletonAbsorptionFluorescent Antibody TechniqueCattleInulinCell Adhesion MoleculesClaudin-2TranscytosisOsmosisNephrocalcinosisReverse Transcriptase Polymerase Chain ReactionMice, KnockoutGene Expression RegulationBlood-Air BarrierDisease Models, AnimalCell SurvivalMalpighian TubulesImmunohistochemistryMembrane PotentialsBiological Transport, ActiveTumor Necrosis Factor-alphaEnzyme ActivationRNA, MessengerDiffusionIon Transport