2004
Maitotoxin Induces Biphasic Interleukin-1β Secretion and Membrane Blebbing in Murine Macrophages
Verhoef P, Kertesy S, Estacion M, Schilling W, Dubyak G. Maitotoxin Induces Biphasic Interleukin-1β Secretion and Membrane Blebbing in Murine Macrophages. Molecular Pharmacology 2004, 66: 909-920. PMID: 15385641, DOI: 10.1124/mol.66.4.909.Peer-Reviewed Original ResearchConceptsMTX treatmentMIL-1betaIL-1betaCytolytic releaseProIL-1betaProinflammatory cytokine interleukin-1betaProinflammatory cytokine secretionCytokine interleukin-1betaMature IL-1betaMurine macrophagesInterleukin-1β secretionCytokine releaseInflammatory leukocytesCytokine secretionP2X7 receptorInterleukin-1betaInflammatory macrophagesExtracellular Ca2Extracellular glycineIntracellular Ca2Vivo responseMacrophagesCation channelsSecretionLytic phaseAssociation of Immunophilins with Mammalian TRPC Channels*
Sinkins W, Goel M, Estacion M, Schilling W. Association of Immunophilins with Mammalian TRPC Channels*. Journal Of Biological Chemistry 2004, 279: 34521-34529. PMID: 15199065, DOI: 10.1074/jbc.m401156200.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBaculoviridaeBrainCalcium ChannelsCell LineDose-Response Relationship, DrugElectrophysiologyGlutamineHumansImmunoblottingImmunophilinsInsectaMutationPeptidesPrecipitin TestsProlineProtein BindingProtein Structure, TertiaryRatsTacrolimus Binding Protein 1ATacrolimus Binding ProteinsTime FactorsTRPC Cation ChannelsConceptsTRPC channel proteinsChannel proteinsMammalian TRPC channelsTRPC channelsHEK cellsBinding of FKBP12Rat brain lysatesImmunosuppressant drug FK506Receptor-mediated activationSf9 cellsAccessory proteinsRat cerebral cortexImmunophilinsDrug FK506Brain lysatesFKBP52FKBP12Membrane lysatesGln mutationINADProteinFKBP59SignalplexTRPC1Cerebral cortexActivation of Human TRPC6 Channels by Receptor Stimulation*
Estacion M, Li S, Sinkins W, Gosling M, Bahra P, Poll C, Westwick J, Schilling W. Activation of Human TRPC6 Channels by Receptor Stimulation*. Journal Of Biological Chemistry 2004, 279: 22047-22056. PMID: 15023993, DOI: 10.1074/jbc.m402320200.Peer-Reviewed Original ResearchMeSH KeywordsCalcium ChannelsCarbacholCell LineCell MembraneCholinergic AgonistsDNA, ComplementaryDose-Response Relationship, DrugElectrophysiologyEnzyme InhibitorsHumansIonomycinIonophoresKineticsLac OperonMembrane PotentialsProtein BindingTetradecanoylphorbol AcetateThapsigarginTime FactorsTransfectionTRPC Cation ChannelsTRPC6 Cation ChannelConceptsReceptor stimulationTRPC6 currentsTRPC6 channelsSteep dose-response relationshipEffect of carbacholConcentrations of carbacholSteep concentration-response relationshipReceptor-mediated eventsActivation of TRPC6Channel activityDose-response relationshipWhole-cell membrane currentsSignificant acute effectConcentration-response relationshipCell membrane currentsAcute effectsCarbacholGeneration of DAGHuman embryonic kidney cellsPrior stimulationPatch pipetteTRPC6 activityEmbryonic kidney cellsMembrane currentsMembrane depolarization
2003
P2X7 Receptor-Dependent Blebbing and the Activation of Rho-Effector Kinases, Caspases, and IL-1β Release
Verhoef P, Estacion M, Schilling W, Dubyak G. P2X7 Receptor-Dependent Blebbing and the Activation of Rho-Effector Kinases, Caspases, and IL-1β Release. The Journal Of Immunology 2003, 170: 5728-5738. PMID: 12759456, DOI: 10.4049/jimmunol.170.11.5728.Peer-Reviewed Original ResearchMeSH Keywords1-(5-Isoquinolinesulfonyl)-2-MethylpiperazineAdenosine TriphosphateAmidesAnimalsCaspase InhibitorsCaspasesCell LineEnzyme ActivationExtracellular SpaceHumansInterleukin-1Intracellular Signaling Peptides and ProteinsMacrophagesMiceProtein Serine-Threonine KinasesPseudopodiaPyridinesReceptors, Purinergic P2Receptors, Purinergic P2X7Rho-Associated KinasesRhoA GTP-Binding ProteinSignal TransductionConceptsPlasma membrane organizationRho effector kinasesHuman embryonic kidney 293 cellsMurine macrophagesEmbryonic kidney 293 cellsPlasma membrane morphologyInhibitor KN-62Activation of RhoAKidney 293 cellsMembrane organizationTime-lapse moviesIL-1 beta releaseBlebbingKN-62Cation channel activationPore formationBiochemical analysisActivation signalsATPATP additionATP treatmentChannel activationAgonist BzATPATP concentrationCells
2001
Regulation of Drosophila TRPL Channels by Immunophilin FKBP59*
Goel M, Garcia R, Estacion M, Schilling W. Regulation of Drosophila TRPL Channels by Immunophilin FKBP59*. Journal Of Biological Chemistry 2001, 276: 38762-38773. PMID: 11514552, DOI: 10.1074/jbc.m104125200.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid MotifsAmino Acid SequenceAnimalsBinding SitesCalciumCalmodulin-Binding ProteinsCationsCell LineChelating AgentsDNA, ComplementaryDrosophilaDrosophila ProteinsEgtazic AcidElectrophysiologyGene LibraryGlutathione TransferaseHumansImmunohistochemistryInsectaMembrane ProteinsMicroscopy, FluorescenceMolecular Sequence DataMutationPhotoreceptor Cells, InvertebratePolymerase Chain ReactionPrecipitin TestsProtein BindingProtein Structure, TertiaryRecombinant ProteinsSequence Homology, Amino AcidSignal TransductionTacrolimus Binding ProteinsTime FactorsTransient Receptor Potential ChannelsTwo-Hybrid System TechniquesConceptsS2 cellsTRPL channelsDrosophila head cDNA libraryDrosophila photoreceptor cellsHuman FK506-binding proteinMultimeric signaling complexesTwo-hybrid screenDrosophila S2 cellsDrosophila TRPL channelsSf9 cell lysatesFK506-binding proteinChannel activitySite-directed mutagenesisCytoplasmic membrane surfaceFura-2 assayTransient receptor potentialDrosophila homologPermeable cation channelSignaling ComplexNovel proteinCDNA librarySf9 cellsINADCytoplasmic mouthChannel regulationRegulation of Drosophila transient receptor potential‐like (TrpL) channels by phospholipase C‐dependent mechanisms
Estacion M, Sinkins W, Schilling W. Regulation of Drosophila transient receptor potential‐like (TrpL) channels by phospholipase C‐dependent mechanisms. The Journal Of Physiology 2001, 530: 1-19. PMID: 11136854, PMCID: PMC2278390, DOI: 10.1111/j.1469-7793.2001.0001m.x.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBaculoviridaeCalciumCalmodulin-Binding ProteinsCell LineCHO CellsCricetinaeDrosophilaDrosophila ProteinsFluorescent DyesFura-2Indicators and ReagentsMembrane PotentialsMembrane ProteinsOocytesPatch-Clamp TechniquesPhosphatidylinositol 4,5-DiphosphateSpodopteraTransient Receptor Potential ChannelsType C PhospholipasesXenopusConceptsPhospholipase CPhospholipase DDrosophila TRPL channelsTRPL channel activitySf9 insect cellsBacterial PI-PLCsPLC-dependent mechanismChannel activityFura-2 assayReceptor stimulationHydrolysis of PIP2Generation of diacylglycerolPoly-unsaturated fatty acidsTRPL channelsReceptor-mediated activationAddition of phosphatidylinositolInsect cellsExogenous applicationPI-PLCTransient receptor potential-like channelPC-PLCPIP2Spontaneous channel activityTRPLDiacylglycerol
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
1998
Functional expression of TrpC1: a human homologue of the Drosophila Trp channel
SINKINS W, ESTACION M, SCHILLING W. Functional expression of TrpC1: a human homologue of the Drosophila Trp channel. Biochemical Journal 1998, 331: 331-339. PMID: 9512497, PMCID: PMC1219356, DOI: 10.1042/bj3310331.Peer-Reviewed Original ResearchConceptsStore-operated channelsPost-infection timesBasal cytosolic free Ca2Mammalian cellsExpression of TRPC1Whole-cell membrane currentsSf9 cellsNon-selective cation channelsCytosolic free Ca2Drosophila TRP channelsSf9 insect cellsInternal Ca2Baculovirus expression systemPlasmalemmal Ca2Basal Ba2TRPC1Free Ca2TRP channelsCation channelsGluconate solutionMembrane currentsInsect cellsAdditional subunitsHuman homologueCytoplasmic factors
1997
Mutations 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
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 competenceProgression
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