1998
Heterologous Expression of the Kv3.1 Potassium Channel Eliminates Spike Broadening and the Induction of a Depolarizing Afterpotential in the Peptidergic Bag Cell Neurons
Whim M, Kaczmarek L. Heterologous Expression of the Kv3.1 Potassium Channel Eliminates Spike Broadening and the Induction of a Depolarizing Afterpotential in the Peptidergic Bag Cell Neurons. Journal Of Neuroscience 1998, 18: 9171-9180. PMID: 9801357, PMCID: PMC6792887, DOI: 10.1523/jneurosci.18-22-09171.1998.Peer-Reviewed Original ResearchConceptsBag cell neuronsCell neuronsAction potentialsCalcium entryUse-dependent inactivationExpression of Kv3.1Kv3.1 potassium channelPeptidergic bag cell neuronsControl neuronsSpontaneous firingBrief synaptic stimulationCalcium currentNeuronal excitabilityIntracellular calciumCalcium influxSynaptic stimulationDepolarizing afterpotentialsBAPTA-AMAfterpotentialsNeuronsPotassium channelsClusters of cellsKv3.1InductionPhysiological role
1993
The peptide FMRFa terminates a discharge in Aplysia bag cell neurons by modulating calcium, potassium, and chloride conductances
Fisher T, Lin C, Kaczmarek L. The peptide FMRFa terminates a discharge in Aplysia bag cell neurons by modulating calcium, potassium, and chloride conductances. Journal Of Neurophysiology 1993, 69: 2164-2173. PMID: 7688803, DOI: 10.1152/jn.1993.69.6.2164.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAplysiaCalcium ChannelsCells, CulturedChloride ChannelsElectric StimulationElectrophysiologyFMRFamideGangliaImmunohistochemistryIon ChannelsMembrane PotentialsMembrane ProteinsNeuritesNeuronsNeuropeptidesNeurotransmitter AgentsPotassium ChannelsStereotyped BehaviorTetradecanoylphorbol AcetateConceptsBag cell neuronsCell neuronsAction potentialsElectrical stimulationVoltage-activated calcium currentsOnset of afterdischargePowerful inhibitory influenceIntact abdominal gangliaIon substitution experimentsVoltage-clamp experimentsAfferent nervesProtein kinase C. 5Channel blockersCalcium currentPrimary cell culturesAbdominal ganglionInhibitory influenceAfterdischargesCyclic AMP analogueFMRFaOutward currentsNeuronal processesNeuronsAplysia bag cell neuronsReversal potential
1992
Hyperosmotic media inhibit voltage-dependent calcium influx and peptide release in Aplysia neurons
Loechner K, Knox R, Connor J, Kaczmarek L. Hyperosmotic media inhibit voltage-dependent calcium influx and peptide release in Aplysia neurons. The Journal Of Membrane Biology 1992, 128: 41-52. PMID: 1323684, DOI: 10.1007/bf00231869.Peer-Reviewed Original ResearchConceptsBag cell neuronsCell neuronsAction potentialsVoltage-dependent calcium influxVoltage-dependent calcium currentsPotassium-induced depolarizationIntracellular calcium levelsCalcium indicator dyeEffect of hyperosmolalityHyperosmotic mediumCalcium currentCalcium influxFura-2Calcium levelsPeptide secretionCalcium entryAfterdischargesBrief stimulationNeuroactive peptidesNeuronsSecretory propertiesAplysia neuronsHigh potassiumPeptide releaseRelease of peptides
1989
Protein kinase inhibitors selectively block phorbol ester- or forskolin- induced changes in excitability of Aplysia neurons
Conn P, Strong J, Azhderian E, Nairn A, Greengard P, Kaczmarek L. Protein kinase inhibitors selectively block phorbol ester- or forskolin- induced changes in excitability of Aplysia neurons. Journal Of Neuroscience 1989, 9: 473-479. PMID: 2537389, PMCID: PMC6569795, DOI: 10.1523/jneurosci.09-02-00473.1989.Peer-Reviewed Original ResearchConceptsProtein kinase CBag cell neuronsVoltage-dependent calcium currentsCAMP-PKPhorbol esterKinase CCell neuronsAction potentialsCalcium currentInhibitor of PKCProtein kinase inhibitorsPhorbol ester-induced enhancementKinase inhibitor 1Protein kinase inhibitor 1Adenylate cyclase activator forskolinCyclase activator forskolinProtein inhibitorGranule movementVoltage-dependent currentsCell action potentialsCAMP analogEffect of forskolinActivator forskolinPhorbol ester-induced changesNeuronal excitability
1987
Stimulation of protein kinase C recruits covert calcium channels in Aplysia bag cell neurons
Strong J, Fox A, Tsien R, Kaczmarek L. Stimulation of protein kinase C recruits covert calcium channels in Aplysia bag cell neurons. Nature 1987, 325: 714-717. PMID: 2434853, DOI: 10.1038/325714a0.Peer-Reviewed Original ResearchConceptsProtein kinase CBag cell neuronsKinase CProtein kinaseCyclic AMP-dependent protein kinaseAMP-dependent protein kinaseAplysia bag cell neuronsCell neuronsCalcium channelsSingle-channel levelExcitable cellsKinaseUntreated cellsUnitary conductanceCalcium currentPeptidergic bag cell neuronsVoltage-activated calcium channelsCardiac muscleDifferent unitary conductancesCellsDifferent mechanismsVoltage-activated calcium currentsChannel levelSecond classNeurons
1984
A voltage-clamp analysis of currents underlying cyclic AMP-induced membrane modulation in isolated peptidergic neurons of Aplysia
Kaczmarek L, Strumwasser F. A voltage-clamp analysis of currents underlying cyclic AMP-induced membrane modulation in isolated peptidergic neurons of Aplysia. Journal Of Neurophysiology 1984, 52: 340-349. PMID: 6090605, DOI: 10.1152/jn.1984.52.2.340.Peer-Reviewed Original ResearchConceptsBag cell neuronsCell neuronsCyclic AMP analoguePotassium currentOutward currentsNormal ionic mediumOnset of afterdischargePhosphodiesterase-resistant cAMP analoguePeak inward currentsAMP analogueBag cell clustersDelayed potassium currentMinority of cellsSpontaneous dischargeCalcium currentPeptidergic neuronsVoltage-clamp analysisCell culturesTwo-electrode voltage clampInward currentsSodium currentNegative slope resistanceA-currentMarked reductionNeurons