2021
Increased branched‐chain amino acids at baseline and hours before a spontaneous seizure in the human epileptic brain
Ong C, Damisah EC, Gruenbaum SE, Dhaher R, Deng Y, Sandhu MRS, Zaveri HP, Spencer DD, Eid T. Increased branched‐chain amino acids at baseline and hours before a spontaneous seizure in the human epileptic brain. Epilepsia 2021, 62: e88-e97. PMID: 33949690, PMCID: PMC11259155, DOI: 10.1111/epi.16920.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAmino Acids, Branched-ChainBrain ChemistryChildChild, PreschoolChromatography, High Pressure LiquidDrug Resistant EpilepsyElectrocorticographyElectroencephalographyEpilepsies, PartialExtracellular SpaceFemaleGlutamic AcidHumansIsoleucineMaleMicrodialysisMiddle AgedSeizuresTandem Mass SpectrometryYoung AdultConceptsSpontaneous seizuresDrug-resistant focal epilepsyExtracellular brain glutamateHuman epileptic brainBranched-chain amino acidsBranched chain amino acids valineRefractory epilepsyBrain microdialysisGlutamatergic neurotransmissionFocal epilepsySeizure onsetBrain glutamateEpileptic brainHuman patientsSeizuresBrain regionsDialysis samplesMammalian targetEpilepsyLiquid chromatography-tandem mass spectrometryBaselineBCAAIntracranial electroencephalographyChromatography-tandem mass spectrometryPatientsAstroglial Glutamine Synthetase and the Pathogenesis of Mesial Temporal Lobe Epilepsy
Sandhu MRS, Gruenbaum BF, Gruenbaum SE, Dhaher R, Deshpande K, Funaro MC, Lee TW, Zaveri HP, Eid T. Astroglial Glutamine Synthetase and the Pathogenesis of Mesial Temporal Lobe Epilepsy. Frontiers In Neurology 2021, 12: 665334. PMID: 33927688, PMCID: PMC8078591, DOI: 10.3389/fneur.2021.665334.Peer-Reviewed Original ResearchMesial temporal lobe epilepsyAstroglial glutamine synthetaseTemporal lobe epilepsyLobe epilepsyIntractable mesial temporal lobe epilepsyAstrocytic glutamine synthetaseDepressive-like featuresPathogenesis of epilepsyType of epilepsyDiscrete brain regionsNeocortical epilepsyHippocampal neuronsEpilepsyBrain regionsGlutamate-ammonia ligaseLaboratory animalsPathogenesisPossible roleExperimental inhibitionGlutamine synthetaseEnzyme glutamine synthetaseDysfunctionSeizuresAstrocytesSyndromeNetwork-Related Changes in Neurotransmitters and Seizure Propagation During Rodent Epileptogenesis
Dhaher R, Gruenbaum SE, Sandhu MRS, Ottestad-Hansen S, Tu N, Wang Y, Lee TW, Deshpande K, Spencer DD, Danbolt NC, Zaveri HP, Eid T. Network-Related Changes in Neurotransmitters and Seizure Propagation During Rodent Epileptogenesis. Neurology 2021, 96: e2261-e2271. PMID: 33722994, PMCID: PMC8166437, DOI: 10.1212/wnl.0000000000011846.Peer-Reviewed Original ResearchConceptsSpontaneous seizuresSeizure propagationSeizure focusMesial temporal lobe epilepsyExtracellular brain levelsTemporal lobe epilepsyExtracellular glutamate levelsRelevant rodent modelsGlutamine synthetase inhibitor methionine sulfoximineTransporter subtype 1Contralateral hippocampusLobe epilepsyBrain levelsBrain microdialysisExtracellular GABANeurotransmitter levelsSeizure initiationGlutamate levelsSeizure onsetEpilepsy networkRodent modelsSubtype 1EpileptogenesisHippocampusBrain regions
2017
(Invited) Conjoint Measurement of Brain Electrophysiology and Neurochemistry
Zaveri H, Ganesh N, Goncharova I, Damisah E, Ong C, Perez E, Staib L, Hirsch L, Petroff O, Spencer D, Eid T. (Invited) Conjoint Measurement of Brain Electrophysiology and Neurochemistry. ECS Meeting Abstracts 2017, MA2017-02: 2329-2329. DOI: 10.1149/ma2017-02/55/2329.Peer-Reviewed Original ResearchInterictal EEG spikesBasal glutamateBrain excitabilityIntractable epilepsyEEG spikesBrain electrophysiologySpike rateBasal extracellular glutamate concentrationsIntracranial EEG monitoringExtracellular glutamate concentrationCo-localized measurementsPossible epilepsy surgeryBrain extracellular glutamateInterictal electroencephalographyMicrodialysis catheterEpilepsy surgeryExtracellular glutamateBrain neurochemistryDialysis probeNeurochemical basisEEG monitoringGlutamate concentrationBrain regionsEpilepsyPatients
2013
139 Brain Extracellular Branched-Chain Amino Acids in Medically Refractory Localization-Related Epilepsy
Ong C, Damisah E, Haldeman C, Eid T, Spencer D. 139 Brain Extracellular Branched-Chain Amino Acids in Medically Refractory Localization-Related Epilepsy. Neurosurgery 2013, 60: 166. DOI: 10.1227/01.neu.0000432730.18532.a2.Peer-Reviewed Original ResearchLocalization-related epilepsyRefractory localization-related epilepsyBrain areasExtracellular brain glutamateRatio of BCAAExcitatory transmitter glutamateInitiation of seizuresEpileptogenic brain areasCentral nervous systemBranched-chain amino acidsRefractory LocalizationMicrodialysis catheterIntracerebral microdialysisExtracellular glutamateBrain glutamateTransmitter glutamateElectrode implantationTherapeutic targetNervous systemExtracellular levelsSeizuresEpilepsyBrain regionsDepth electrodesBCAA