2009
Maitotoxin converts the plasmalemmal Ca2+ pump into a Ca2+-permeable nonselective cation channel
Sinkins W, Estacion M, Prasad V, Goel M, Shull G, Kunze D, Schilling W. Maitotoxin converts the plasmalemmal Ca2+ pump into a Ca2+-permeable nonselective cation channel. American Journal Of Physiology - Cell Physiology 2009, 297: c1533-c1543. PMID: 19794142, PMCID: PMC2793065, DOI: 10.1152/ajpcell.00252.2009.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphateAnimalsAnimals, Genetically ModifiedCalciumCation Transport ProteinsCationsCell MembraneCells, CulturedDown-RegulationElectric ConductivityFibroblastsHumansIon ChannelsKidneyMarine ToxinsMiceOxocinsPermeabilityPlasma Membrane Calcium-Transporting ATPasesRNA, Small InterferingSpodopteraUp-RegulationConceptsPermeable nonselective cation channelNonselective cation channelsCation channelsSpodoptera frugiperda (Sf9) insect cellsHEK cellsMouse embryonic fibroblastsHuman embryonic kidney 293 cellsEmbryonic kidney 293 cellsKidney 293 cellsInsect cellsEmbryonic fibroblastsWhole-cell membrane currentsMolecular identityCell membrane currentsCell typesPMCACytosolic freeMarine toxinsEnhanced expressionWhole-cell currentsPlasmalemmal Ca2PalytoxinATPaseCellsMaitotoxin
1999
Maitotoxin activates a nonselective cation channel and a P2Z/P2X7-like cytolytic pore in human skin fibroblasts
Schilling W, Sinkins W, Estacion M. Maitotoxin activates a nonselective cation channel and a P2Z/P2X7-like cytolytic pore in human skin fibroblasts. American Journal Of Physiology 1999, 277: c755-c765. PMID: 10516106, DOI: 10.1152/ajpcell.1999.277.4.c755.Peer-Reviewed Original ResearchConceptsEffects of maitotoxinConcentration-dependent increaseNonselective cation channelsCation channelsHuman skin fibroblastsPlasmalemmal permeabilitySkin fibroblastsUptake of ethidiumIntracellular fura-2Cytolytic poreYO-PRO-1Permeable cation channelFura-2Receptor stimulationTypes of cellsCytosolic freeLactate dehydrogenaseMembrane currentsPotent cytolytic agentCytolytic agentsMaitotoxinCell typesPresent studyCell levelSingle-cell level
1997
PDGF-Stimulated Calcium Influx Changes During In Vitro Cell Transformation
Estacion M, Mordan L. PDGF-Stimulated Calcium Influx Changes During In Vitro Cell Transformation. Cellular Signalling 1997, 9: 363-366. PMID: 9376215, DOI: 10.1016/s0898-6568(96)00184-2.Peer-Reviewed Original ResearchConceptsT-type calcium channelsCalcium signalsIntracellular calcium signalsC3H 10T1/2 mouse fibroblastsCalcium channelsPreneoplastic clonesMarked reductionGrowth factorMetabolism changesVitro Cell TransformationCell transformationColonies of cellsElectrophysiology measurementsInflux changeCellsMouse fibroblastsMutations Causing Achondroplasia and Thanatophoric Dysplasia Alter bFGF-Induced Calcium Signals in Human Diploid Fibroblasts
Nguyen H, Estacion M, Gargus J. Mutations Causing Achondroplasia and Thanatophoric Dysplasia Alter bFGF-Induced Calcium Signals in Human Diploid Fibroblasts. Human Molecular Genetics 1997, 6: 681-688. PMID: 9158142, DOI: 10.1093/hmg/6.5.681.Peer-Reviewed Original ResearchMeSH KeywordsAchondroplasiaBradykininCalciumCell LineDiploidyFibroblast Growth Factor 2FibroblastsHomozygoteHumansMutationProtein-Tyrosine KinasesReceptor Protein-Tyrosine KinasesReceptor, Fibroblast Growth Factor, Type 1Receptor, Fibroblast Growth Factor, Type 2Receptor, Fibroblast Growth Factor, Type 3Receptors, Fibroblast Growth FactorRNA SplicingSignal TransductionThanatophoric DysplasiaConceptsThanatophoric dysplasiaCalcium signalsBasic fibroblast growth factorCell linesCalcium-imaging analysesFibroblast growth factorFibroblast growth factor receptor (FGFR) gene familyHuman diploid fibroblastsPathophysiological mechanismsIntracellular calciumBlinded studyFGFR3 mutationsUnresponsive linesReceptor functionHereditary disorderTransient increaseGrowth factorDiploid fibroblastsControl cellsBone developmentFibroblast cell lineCalcium wavesReceptor gene familyHeterogeneous signalsAchondroplasia
1996
Calcium is permeable through a maitotoxin-activated nonselective cation channel in mouse L cells
Estacion M, Nguyen H, Gargus J. Calcium is permeable through a maitotoxin-activated nonselective cation channel in mouse L cells. American Journal Of Physiology 1996, 270: c1145-c1152. PMID: 8928742, DOI: 10.1152/ajpcell.1996.270.4.c1145.Peer-Reviewed Original ResearchConceptsNonselective cation channelsCation channelsCalcium-activated potassium channelsPlatelet-derived growth factorIntracellular calciumGrowth factor responseExtracellular calciumSecondary activationPotassium channelsGrowth factorFactor responseL cellsCell typesCalciumMouse L cellsL-cell fibroblastsMouse L-cell fibroblastsCell fibroblastsCellsIrreversible opening
1993
Ca2+ influx via T-type channels modulates PDGF-induced replication of mouse fibroblasts
Wang Z, Estacion M, Mordan L. Ca2+ influx via T-type channels modulates PDGF-induced replication of mouse fibroblasts. American Journal Of Physiology 1993, 265: c1239-c1246. PMID: 8238477, DOI: 10.1152/ajpcell.1993.265.5.c1239.Peer-Reviewed Original ResearchConceptsVoltage-gated calcium channelsExtracellular calcium influxCalcium influxNordihydroguariaretic acidCalcium currentWhole-cell patch-clamp techniqueCell patch-clamp techniqueIntracellular calcium increaseInward calcium currentCell proliferationIntracellular calcium concentrationT-type channelsAddition of prostaglandinPlatelet-derived growth factorMean inhibitory dosePatch-clamp techniqueC3H/10T1/2 mouse fibroblastsInhibitory doseCalcium channelsCalcium increaseSustained increaseGrowth factorInhibitory effectCalcium concentrationCell cycle progressionCompetence induction by PDGF requires sustained calcium influx by a mechanism distinct from storage-dependent calcium influx
Estacion M, Mordan L. Competence induction by PDGF requires sustained calcium influx by a mechanism distinct from storage-dependent calcium influx. Cell Calcium 1993, 14: 439-454. PMID: 8395338, DOI: 10.1016/0143-4160(93)90003-o.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBucladesineCalciumCalcium ChannelsCell CompartmentationCell DivisionCell LineCell MembraneColforsinContact InhibitionDNA ReplicationDrug SynergismExtracellular SpaceFibroblastsGallic AcidInsulinIon Channel GatingLanthanumMiceMice, Inbred C3HNifedipinePlatelet-Derived Growth FactorS PhaseSignal TransductionTetradecanoylphorbol AcetateConceptsCalcium influxIntracellular storage sitesExtracellular calciumCalcium influx pathwaySustained calcium influxIntracellular calcium concentrationExtracellular calcium influxRelease of calciumPercentage of cellsC3H 10T1/2 mouse fibroblastsPDGF exposureSustained elevationTMB-8Influx pathwayBiphasic increaseSustained increaseDibutyryl cGMPCalcium concentrationS phasePDGFDibutyryl cAMPCell replicationSelective inhibitionReplicative competenceProgressionExpression of voltage-gated calcium channels correlates with PDGF-stimulated calcium influx and depends upon cell density in C3H 10T12 mouse fibroblasts
Estacion M, Mordan L. Expression of voltage-gated calcium channels correlates with PDGF-stimulated calcium influx and depends upon cell density in C3H 10T12 mouse fibroblasts. Cell Calcium 1993, 14: 161-171. PMID: 8384532, DOI: 10.1016/0143-4160(93)90085-k.Peer-Reviewed Original ResearchConceptsVoltage-gated calcium channelsCalcium channelsT-type voltage-gated calcium channelsWhole-cell patch-clamp recordingsWhole-cell patch-clamp techniqueCell patch-clamp techniquePatch-clamp recordingsPatch-clamp techniqueMembrane calcium channelsIntracellular calcium signalsPlasma membrane calcium channelsC3H 10T1/2 mouse fibroblastsCalcium currentCalcium influxFura-2Extracellular calciumCalcium poolSustained influxGrowth factorInflux componentFraction of cellsCalcium signalsCell densityMouse fibroblastsConfluent monolayers
1991
Characterization of ion channels seen in subconfluent human dermal fibroblasts.
Estacion M. Characterization of ion channels seen in subconfluent human dermal fibroblasts. The Journal Of Physiology 1991, 436: 579-601. PMID: 1712040, PMCID: PMC1181523, DOI: 10.1113/jphysiol.1991.sp018568.Peer-Reviewed Original ResearchConceptsIon channelsHuman dermal fibroblastsBradykinin-stimulated cellsDermal fibroblastsDifferent ion channelsSurprising diversityIon channel modulationChannel phenotypeInward rectifierGap junctionsUnstimulated cellsUnexcitable cellsChannel modulationActivation kineticsGuanosine 5'FibroblastsCellsPhenotypePipette solutionCl- currentFast inactivationExpressionAdditional subtypesPatch-clamp techniqueLow numberAcute electrophysiological responses of bradykinin‐stimulated human fibroblasts.
Estacion M. Acute electrophysiological responses of bradykinin‐stimulated human fibroblasts. The Journal Of Physiology 1991, 436: 603-620. PMID: 1648132, PMCID: PMC1181524, DOI: 10.1113/jphysiol.1991.sp018569.Peer-Reviewed Original ResearchConceptsFura-2 fluorescencePipette solutionIon substitution experimentsGTP gamma SReversal potentialBradykinin stimulationPresence of GTPHuman dermal fibroblastsGamma SPatch-clamp techniqueNon-specific cation channelsBradykinin additionDermal fibroblastsIntracellular calciumLittle voltage dependencePatch-clamped cellsTail current analysisAcute responseInward currentsCalcium ionophoreOutward currentsNear baselineCation channelsElectrophysiological responsesBradykinin
1990
Inhibition of voltage-dependent Na+ current in cell-fusion hybrids containing activated c-Ha-ras
Estacion M. Inhibition of voltage-dependent Na+ current in cell-fusion hybrids containing activated c-Ha-ras. The Journal Of Membrane Biology 1990, 113: 169-175. PMID: 2157017, DOI: 10.1007/bf01872890.Peer-Reviewed Original Research