2020
Gene expression in the epileptic (EL) mouse hippocampus
Lee TS, Li AY, Rapuano A, Mantis J, Eid T, Seyfried TN, de Lanerolle NC. Gene expression in the epileptic (EL) mouse hippocampus. Neurobiology Of Disease 2020, 147: 105152. PMID: 33153970, DOI: 10.1016/j.nbd.2020.105152.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsEpilepsy, Temporal LobeHippocampusMiceMice, Mutant StrainsNeurogliaNeuronsTranscriptomeConceptsTemporal lobe epilepsyHuman temporal lobe epilepsySeizure focusHippocampal seizure focusRole of neurogliaExtensive neuronal lossMolecular changesEpileptic miceMicroglial activationNeuronal lossNeuron lossEl miceLobe epilepsySeizure modelHippocampal fieldsSeizure generationPathological changesPaucity of studiesMouse hippocampusAnimal modelsHeat shock proteinsNormal populationPathological processesExpression levelsEpilepsy
2018
Astrocytes and Glutamine Synthetase in Epileptogenesis
Eid T, Lee T, Patrylo P, Zaveri HP. Astrocytes and Glutamine Synthetase in Epileptogenesis. Journal Of Neuroscience Research 2018, 97: 1345-1362. PMID: 30022509, PMCID: PMC6338538, DOI: 10.1002/jnr.24267.Peer-Reviewed Original ResearchConceptsMesial temporal lobe epilepsyTemporal lobe epilepsyLobe epilepsyAstrocytic glutamine synthetaseRole of astrocytesPotassium channel Kir4.1Important causative factorExcitatory amino acid transporters EAAT1Antiepileptogenic interventionsEpileptogenic insultAntiepileptogenic therapiesEpilepsy developmentChannel Kir4.1Aquaporin-4EpilepsyCausative factorsTransporters EAAT1New targetsSuch interventionsTransporters MCT1DysfunctionAstrocytesMetabolic mechanismsGlutamine synthetaseDownstream effects
2008
Recurrent seizures and brain pathology after inhibition of glutamine synthetase in the hippocampus in rats
Eid T, Ghosh A, Wang Y, Beckström H, Zaveri HP, Lee TS, Lai JC, Malthankar-Phatak GH, de Lanerolle NC. Recurrent seizures and brain pathology after inhibition of glutamine synthetase in the hippocampus in rats. Brain 2008, 131: 2061-2070. PMID: 18669513, PMCID: PMC2724901, DOI: 10.1093/brain/awn133.Peer-Reviewed Original ResearchConceptsMesial temporal lobe epilepsyMesial temporal sclerosisRecurrent seizuresTemporal sclerosisBrain pathologyIntractable mesial temporal lobe epilepsyTemporal lobe epilepsyGlutamine synthetase deficiencyNovel animal modelContinuous microinfusionHippocampal atrophyLobe epilepsyGlutamate excessNeuropathological featuresExtracellular glutamateHippocampal neuronsAnimal modelsTherapeutic interventionsHippocampusSeizuresSclerosisSynthetase deficiencyMinimal injuryPatientsRats
2006
Changes in glial glutamate transporters in human epileptogenic hippocampus: Inadequate explanation for high extracellular glutamate during seizures
Bjørnsen LP, Eid T, Holmseth S, Danbolt NC, Spencer DD, de Lanerolle NC. Changes in glial glutamate transporters in human epileptogenic hippocampus: Inadequate explanation for high extracellular glutamate during seizures. Neurobiology Of Disease 2006, 25: 319-330. PMID: 17112731, DOI: 10.1016/j.nbd.2006.09.014.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAmino Acid Transport System X-AGAstrocytesChildChild, PreschoolDown-RegulationEpilepsyEpilepsy, Temporal LobeExcitatory Amino Acid Transporter 1Excitatory Amino Acid Transporter 2Extracellular FluidFemaleGlutamic AcidHippocampusHumansImmunohistochemistryMaleMicroscopy, Electron, TransmissionMiddle AgedUp-RegulationConceptsTemporal lobe epilepsySclerotic hippocampusNeuronal lossExtracellular glutamateGlial glutamate transporters GLASTHigh extracellular glutamate levelsGroups of hippocampiHuman epileptogenic hippocampusLess neuronal lossExtracellular glutamate levelsGlutamate transporter GLASTGlial glutamate transportersVivo dialysis studyHigh extracellular glutamateSuch compensatory changesEpileptogenic hippocampusHippocampal sclerosisLobe epilepsySclerotic groupSeizure focusGlutamate levelsWeak immunoreactivityGLT-1Glutamate transportersHippocampus
2004
Loss of glutamine synthetase in the human epileptogenic hippocampus: possible mechanism for raised extracellular glutamate in mesial temporal lobe epilepsy
Eid T, Thomas M, Spencer D, Rundén-Pran E, Lai J, Malthankar G, Kim J, Danbolt N, Ottersen O, de Lanerolle N. Loss of glutamine synthetase in the human epileptogenic hippocampus: possible mechanism for raised extracellular glutamate in mesial temporal lobe epilepsy. The Lancet 2004, 363: 28-37. PMID: 14723991, DOI: 10.1016/s0140-6736(03)15166-5.Peer-Reviewed Original ResearchConceptsMesial temporal lobe epilepsyTemporal lobe epilepsyMTLE hippocampiLobe epilepsyExtracellular glutamateHigh extracellular glutamate concentrationsAnteromedial temporal lobeHuman epileptogenic hippocampusExtracellular glutamate accumulationResolution of seizuresExtracellular glutamate concentrationGlial glutamate transportersMeans of immunohistochemistryEpileptogenic hippocampusSurgical resectionSeizure generationGlutamate homeostasisTemporal lobeAstroglial proliferationEpileptic seizuresGlutamate transportersHippocampusTherapeutic interventionsGlutamate concentrationWestern blot
2001
Disruption of Inhibition in Area CA1 of the Hippocampus in a Rat Model of Temporal Lobe Epilepsy
Denslow M, Eid T, Du F, Schwarcz R, Lothman E, Steward O. Disruption of Inhibition in Area CA1 of the Hippocampus in a Rat Model of Temporal Lobe Epilepsy. Journal Of Neurophysiology 2001, 86: 2231-2245. PMID: 11698514, DOI: 10.1152/jn.2001.86.5.2231.Peer-Reviewed Original ResearchConceptsTemporal lobe epilepsyLayer III neuronsPaired-pulse stimulationEntorhinal cortexCommissural projectionsDisruption of inhibitionHeterosynaptic inhibitionAOAA injectionPopulation spikesLobe epilepsyInhibitory functionDentate gyrusRat modelAminooxyacetic acidInhibitory interneuronsControl animalsElectrolytic lesionsTemporo-ammonic pathwayMultiple population spikesPaired-pulse inhibitionDuration of afterdischargeLoss of neuronsHigh-frequency stimulationNumber of stimulationsAbnormal physiological responsesIbotenate Injections into the Pre‐ and Parasubiculum Provide Partial Protection against Kainate‐Induced Epileptic Damage in Layer III of Rat Entorhinal Cortex
Eid T, Du F, Schwarcz R. Ibotenate Injections into the Pre‐ and Parasubiculum Provide Partial Protection against Kainate‐Induced Epileptic Damage in Layer III of Rat Entorhinal Cortex. Epilepsia 2001, 42: 817-824. PMID: 11488878, DOI: 10.1046/j.1528-1157.2001.042007817.x.Peer-Reviewed Original ResearchConceptsTemporal lobe epilepsyEntorhinal cortexLayer IIIIbotenate injectionLobe epilepsySeizure-induced damageLoss of neuronsLayer III neuronsRat entorhinal cortexEpileptic damagePartial neuroprotectionExcitatory afferentsPrimary lesionSeizure activityEntorhinal neuronsAnimal modelsIbotenate lesionsPartial protectionLesionsNeuronsKainatePresubiculumEpilepsySerial reconstructionCortex
1998
Glutamate receptor subunits GluR1 and GluR2/3 distribution shows reorganization in the human epileptogenic hippocampus
De Lanerolle N, Eid T, Von Campe G, Kovacs I, Spencer D, Brines M. Glutamate receptor subunits GluR1 and GluR2/3 distribution shows reorganization in the human epileptogenic hippocampus. European Journal Of Neuroscience 1998, 10: 1687-1703. PMID: 9751141, DOI: 10.1046/j.1460-9568.1998.00171.x.Peer-Reviewed Original ResearchMeSH KeywordsDentate GyrusEpilepsy, Temporal LobeHippocampusHumansImmunohistochemistryIn Situ HybridizationReceptors, AMPAConceptsDentate granule cellsEpileptogenic hippocampusProximal dendritesGranule cellsGlutamate receptor subunits GluR1Human epileptogenic hippocampusControl of seizuresCA3 pyramidal neuronsTemporal lobe epilepsyDendrites of neuronsSitu hybridization histochemistrySubunit-specific antibodiesGluR1 immunoreactivitySame hippocampusFlop splice variantsHilar neuronsGlutamatergic responsesNeuronal lossLobe epilepsyPyramidal neuronsPrincipal neuronsSeizure focusSubunit GluR1Ammon's hornDendritic excrescences
1995
Preferential neuronal loss in layer III of the medial entorhinal cortex in rat models of temporal lobe epilepsy
Du F, Eid T, Lothman E, Kohler C, Schwarcz R. Preferential neuronal loss in layer III of the medial entorhinal cortex in rat models of temporal lobe epilepsy. Journal Of Neuroscience 1995, 15: 6301-6313. PMID: 7472396, PMCID: PMC6577998, DOI: 10.1523/jneurosci.15-10-06301.1995.Peer-Reviewed Original ResearchConceptsPreferential neuronal lossTemporal lobe epilepsyNeuronal lossMedial entorhinal cortexEntorhinal cortexLayer IIILobe epilepsyRat modelIntractable temporal lobe epilepsyAcute status epilepticusLithium/pilocarpineParvalbumin-positive neuronsIntracellular calcium ion concentrationKainic acid administrationNerve cell lossAdult male ratsInjection of diazepamSurviving neuronsProlonged seizuresStatus epilepticusAcid administrationNissl stainingVentral hippocampusKainic acidPathological elevation