1997
Pharmacological Characterization of Na+ Influx via Voltage-Gated Na+ Channels in Spinal Cord Astrocytes
Rose C, Ransom B, Waxman S. Pharmacological Characterization of Na+ Influx via Voltage-Gated Na+ Channels in Spinal Cord Astrocytes. Journal Of Neurophysiology 1997, 78: 3249-3258. PMID: 9405543, DOI: 10.1152/jn.1997.78.6.3249.Peer-Reviewed Original ResearchConceptsSpinal cordChannel inactivationCultured spinal cordSpinal cord astrocytesEffect of veratridineSodium-binding benzofuranMicroM tetrodotoxinPharmacological characterizationAgonist kainatePharmacological inhibitionTetrodotoxinAstrocytesVeratridineCordMembrane depolarizationKainateImportant functional roleInfluxFunctional roleInhibitionCellsProminent pathwayATPase activityInactivationBaseline
1994
Astrocyte Na+ channels are required for maintenance of Na+/K(+)-ATPase activity
Sontheimer H, Fernandez-Marques E, Ullrich N, Pappas C, Waxman S. Astrocyte Na+ channels are required for maintenance of Na+/K(+)-ATPase activity. Journal Of Neuroscience 1994, 14: 2464-2475. PMID: 8182422, PMCID: PMC6577452, DOI: 10.1523/jneurosci.14-05-02464.1994.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnimals, NewbornAstrocytesAstrocytomaCell LineCells, CulturedElectrophysiologyGanglia, SpinalGliomaMembrane PotentialsModels, BiologicalOuabainRatsRats, Sprague-DawleyRubidiumSodiumSodium ChannelsSodium-Potassium-Exchanging ATPaseStrophanthidinTetrodotoxinTime FactorsTumor Cells, CulturedConceptsEffects of TTXGlial cellsAction potential electrogenesisRat spinal cordPatch-clamp recordingsAstrocyte membrane potentialDose-dependent mannerVoltage-activated channelsAcute blockadeSpinal cordVoltage-activated ion channelsSpecific blockerATPase activityAstrocytesTTXAstrocyte deathAction potentialsUnidirectional influxBlockadeExcitable cellsIon channelsOuabainExtracellular spaceMembrane potentialIon levels