2017
Linaclotide activates guanylate cyclase‐C/cGMP/protein kinase‐II‐dependent trafficking of CFTR in the intestine
Ahsan K, Tchernychev B, Kessler MM, Solinga RM, Arthur D, Linde CI, Silos‐Santiago I, Hannig G, Ameen NA. Linaclotide activates guanylate cyclase‐C/cGMP/protein kinase‐II‐dependent trafficking of CFTR in the intestine. Physiological Reports 2017, 5: e13299. PMID: 28592587, PMCID: PMC5471438, DOI: 10.14814/phy2.13299.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell LineCell Line, TumorCell MembraneCyclic AMP-Dependent Protein KinasesCyclic GMPCyclic GMP-Dependent Protein Kinase Type IICystic Fibrosis Transmembrane Conductance RegulatorGuanylyl Cyclase C AgonistsHumansIntestinal MucosaMalePeptidesProtein TransportRatsRats, Sprague-DawleyReceptors, Guanylate Cyclase-CoupledSignal TransductionConceptsRat intestinal loopsLinaclotide treatmentFluid secretionIntestinal loopsCystic fibrosis transmembrane conductance regulatorCell surfaceFibrosis transmembrane conductance regulatorCell surface traffickingChronic idiopathic constipationIrritable bowel syndromeTransmembrane conductance regulatorIntestinal fluid secretionCell surface translocationReceptor guanylyl cyclaseHuman intestinal tissueCaco-2BBe cellsCFTR traffickingCFTR pathwaySubapical compartmentCellular signalingCGMP/PKGProtein kinaseSurface biotinylationIdiopathic constipationPathway components
2015
Restoration of cytoskeletal and membrane tethering defects but not defects in membrane trafficking in the intestinal brush border of mice lacking both myosin Ia and myosin VI
Hegan PS, Kravtsov DV, Caputo C, Egan ME, Ameen NA, Mooseker MS. Restoration of cytoskeletal and membrane tethering defects but not defects in membrane trafficking in the intestinal brush border of mice lacking both myosin Ia and myosin VI. Cytoskeleton 2015, 72: 455-476. PMID: 26286357, PMCID: PMC4715533, DOI: 10.1002/cm.21238.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphateAnimalsApoptosisCell MembraneCell NucleusColitisCrosses, GeneticCystic Fibrosis Transmembrane Conductance RegulatorCytoskeletonDisease ProgressionDuodenumEndosomesEpitheliumGenotypeIn Situ Nick-End LabelingIntestinal MucosaIntestinesMaleMiceMice, KnockoutMicroscopy, Electron, TransmissionMicroscopy, FluorescenceMicrovilliMutationMyosin Heavy ChainsMyosin Type IPhosphates
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 ResearchConceptsV-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 membraneCFTRCharacterization of CFTR High Expresser cells in the intestine
Jakab RL, Collaco AM, Ameen NA. Characterization of CFTR High Expresser cells in the intestine. AJP Gastrointestinal And Liver Physiology 2013, 305: g453-g465. PMID: 23868408, PMCID: PMC3761243, DOI: 10.1152/ajpgi.00094.2013.Peer-Reviewed Original ResearchMeSH KeywordsAcetylcholineAlkaline PhosphataseAnimalsCyclic AMPCystic Fibrosis Transmembrane Conductance RegulatorIntestinal MucosaIntestine, SmallMaleMicrovilliProtein TransportQa-SNARE ProteinsRatsRats, Sprague-DawleySodium-Hydrogen Exchanger 3Sodium-Hydrogen ExchangersSodium-Potassium-Exchanging ATPaseSolute Carrier Family 12, Member 2ConceptsCHE cellsNeighboring enterocytesVacuolar ATPase proton pumpCystic fibrosis transmembrane conductance regulator (CFTR) Cl(-) channelDouble-label immunofluorescence microscopyEightfold higher levelsBrush border membraneRegulatory factors NHERF1Crypt-villus axisCFTR abundanceSyntaxin 3Myosin-1aApical domainRegulated traffic of anion transporters in mammalian Brunner's glands: a role for water and fluid transport
Collaco AM, Jakab RL, Hoekstra NE, Mitchell KA, Brooks A, Ameen NA. Regulated traffic of anion transporters in mammalian Brunner's glands: a role for water and fluid transport. AJP Gastrointestinal And Liver Physiology 2013, 305: g258-g275. PMID: 23744739, PMCID: PMC3742856, DOI: 10.1152/ajpgi.00485.2012.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnion Transport ProteinsAquaporin 5BicarbonatesBiological TransportBrunner GlandsCarbacholCeliac DiseaseChloridesCyclic AMPCystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorDuodenumHumansMaleProtonsRatsRats, Sprague-DawleySecond Messenger SystemsVacuolar Proton-Translocating ATPasesWaterConceptsCystic fibrosis transmembrane conductance regulatorV-ATPaseProton-pumping vacuolar ATPaseApical membraneDistinct membrane domainsFibrosis transmembrane conductance regulatorRat Brunner's glandsTransmembrane conductance regulatorSodium bicarbonate cotransporterAnion transportersApical traffickingMembrane domainsChloride cotransporter 1Secretion of glycoproteinsVacuolar ATPaseSecond messenger activationTransporter localizationConductance regulatorSubcellular distributionAquaporin 5 water channelFunctional transportPKA inhibitorAntimicrobial peptidesTransportersBasolateral membrane
2001
Anomalous apical plasma membrane phenotype in CK8-deficient mice indicates a novel role for intermediate filaments in the polarization of simple epithelia
Ameen N, Figueroa Y, Salas P. Anomalous apical plasma membrane phenotype in CK8-deficient mice indicates a novel role for intermediate filaments in the polarization of simple epithelia. Journal Of Cell Science 2001, 114: 563-575. PMID: 11171325, DOI: 10.1242/jcs.114.3.563.Peer-Reviewed Original ResearchConceptsIntermediate filamentsPolarized epithelial cellsApical membrane proteinsEpithelial cellsSyntaxin 3Apical domainFemale sterilityMembrane proteinsApical markerNovel functionGamma-tubulinNovel roleApical poleSimple epitheliaCell typesColorectal hyperplasiaCK intermediate filamentsNull micePhenotypeBasolateral levelsNecrotic cellsMembrane phenotypeCellsFilamentsCytoplasm of enterocytes
2000
Subcellular distribution of CFTR in rat intestine supports a physiologic role for CFTR regulation by vesicle traffic
Ameen N, van Donselaar E, Posthuma G, de Jonge H, McLaughlin G, Geuze H, Marino C, Peters P. Subcellular distribution of CFTR in rat intestine supports a physiologic role for CFTR regulation by vesicle traffic. Histochemistry And Cell Biology 2000, 114: 219-228. PMID: 11083465, DOI: 10.1007/s004180000167.Peer-Reviewed Original ResearchConceptsCystic fibrosis transmembrane conductance regulatorVesicle trafficSubcellular distributionVesicle insertionCAMP stimulationCAMP-activated chloride channelCryoimmunogold electron microscopyFibrosis transmembrane conductance regulatorApical plasma membraneTransmembrane conductance regulatorCultured intestinal cellsCFTR regulationCHE cellsPhysiologic roleVesicular compartmentsPlasma membraneApical redistributionConductance regulatorSubapical vesiclesCellular distributionChloride channelsSecretory cellsIntestinal cellsEpithelial cellsCellsCellular localization of the cystic fibrosis transmembrane conductance regulator in mouse intestinal tract
Ameen N, Alexis J, Salas P. Cellular localization of the cystic fibrosis transmembrane conductance regulator in mouse intestinal tract. Histochemistry And Cell Biology 2000, 114: 69-75. PMID: 10959824, DOI: 10.1007/s004180000164.Peer-Reviewed Original ResearchConceptsMouse intestinal tractCystic fibrosisIntestinal tractCystic fibrosis transmembrane conductance regulatorSmall intestinal obstructionSevere gastrointestinal diseasePathophysiology of CFMouse model systemFibrosis transmembrane conductance regulatorVillus distributionTransmembrane conductance regulatorIntestinal obstructionDifferent phenotypic expressionsCF intestineGastrointestinal diseasesBicarbonate secretionTransgenic miceHuman CF diseaseSmall intestineDisease expressionImmunoblot techniqueLethal obstructionMouse intestineMiceConductance regulator
1999
CFTR channel insertion to the apical surface in rat duodenal villus epithelial cells is upregulated by VIP in vivo
Ameen N, Martensson B, Bourguinon L, Marino C, Isenberg J, McLaughlin G. CFTR channel insertion to the apical surface in rat duodenal villus epithelial cells is upregulated by VIP in vivo. Journal Of Cell Science 1999, 112: 887-894. PMID: 10036238, DOI: 10.1242/jcs.112.6.887.Peer-Reviewed Original ResearchConceptsCystic fibrosis transmembrane conductance regulator (CFTR) channelVillus epithelial cellsApical surfaceApical plasma membraneAnti-CFTR antibodiesQuantitative confocal microscopyNew protein synthesisApical membrane insertionIntestinal villus epithelial cellsEpithelial cellsMembrane CFTRMembrane insertionApical cytoskeletonNormal CFTRCHE cellsPlasma membraneAbsence of cycloheximideSubcellular redistributionCFTR channelsC-terminusCAMP stimulationIntracellular cAMP levelsProtein synthesisChannel insertionCFTR function
1996
A delta F508 mutation in mouse cystic fibrosis transmembrane conductance regulator results in a temperature-sensitive processing defect in vivo.
French PJ, van Doorninck JH, Peters RH, Verbeek E, Ameen NA, Marino CR, de Jonge HR, Bijman J, Scholte BJ. A delta F508 mutation in mouse cystic fibrosis transmembrane conductance regulator results in a temperature-sensitive processing defect in vivo. Journal Of Clinical Investigation 1996, 98: 1304-1312. PMID: 8823295, PMCID: PMC507556, DOI: 10.1172/jci118917.Peer-Reviewed Original Research
1995
A unique subset of rat and human intestinal villus cells express the cystic fibrosis transmembrane conductance regulator
Ameen N, Ardito T, Kashgarian M, Marino C. A unique subset of rat and human intestinal villus cells express the cystic fibrosis transmembrane conductance regulator. Gastroenterology 1995, 108: 1016-1023. PMID: 7535272, DOI: 10.1016/0016-5085(95)90198-1.Peer-Reviewed Original ResearchConceptsProximal small intestineCrypt epithelial cellsVillus cellsSmall intestineHuman proximal small intestineCystic fibrosis transmembrane conductance regulatorEpithelial cellsSurface marker expressionFibrosis transmembrane conductance regulatorBrush border sucraseTransmembrane conductance regulatorIntestinal villus cellsBACKGROUND/Marker antibodiesMarker expressionUnique subsetVillus enterocytesConductance regulatorIntestineLactase expressionBrush border