2023
Threshold for the Pleasurable Effects of Nicotine Are Lower Than Its Reinforcing Effects During Self-Administration
MacLean RR, Eid T, Parida S, Gueorguieva R, DeVito EE, Sofuoglu M. Threshold for the Pleasurable Effects of Nicotine Are Lower Than Its Reinforcing Effects During Self-Administration. Experimental And Clinical Psychopharmacology 2023, 31: 37-45. PMID: 35254839, PMCID: PMC9448824, DOI: 10.1037/pha0000556.Peer-Reviewed Original ResearchConceptsNicotine metabolite ratioDose of nicotineNicotine reinforcementSubjective effectsDiscriminative stimulus effectsHeart rate increaseDoses of nicotineSelf-administration procedureSubjective positive effectsDaily smokersBaseline cravingIntravenous nicotineOvernight abstinenceCigarette cravingDrug effectsMetabolite ratiosStimulus effectsSecondary analysisPlaceboSelf-AdministrationNicotine choiceTobacco productsNicotinePleasurable effectsYoung adults
2022
Impact of delivery rate on the acute response to intravenous nicotine: A human laboratory study with implications for regulatory science
De Aquino JP, MacLean RR, Gueorguieva R, DeVito EE, Eid T, Sofuoglu M. Impact of delivery rate on the acute response to intravenous nicotine: A human laboratory study with implications for regulatory science. Addiction Biology 2022, 27: e13161. PMID: 35229960, PMCID: PMC8903077, DOI: 10.1111/adb.13161.Peer-Reviewed Original ResearchConceptsAbuse potentialPositive subjective drug effectsSubjective drug effectsHuman laboratory studiesPositive subjective effectsAttention functionSmoking urgesOvernight abstinencePotential therapeutic effectsEffects of nicotineHeart rate increaseDelivery rateDependent smokersExperimental sessionsSubjective effectsNicotine dependenceIntravenous nicotineBlood pressureSaline infusionAcute effectsTherapeutic effectHeart rateDrug effectsAcute responseCrossover design
2021
Influence of Menthol and Green Apple E-Liquids Containing Different Nicotine Concentrations Among Youth E-Cigarette Users
Jackson A, Green B, Erythropel HC, Kong G, Cavallo DA, Eid T, Gueorguieva R, Buta E, O’Malley S, Krishnan-Sarin S. Influence of Menthol and Green Apple E-Liquids Containing Different Nicotine Concentrations Among Youth E-Cigarette Users. Experimental And Clinical Psychopharmacology 2021, 29: 355-365. PMID: 32297782, PMCID: PMC7572568, DOI: 10.1037/pha0000368.Peer-Reviewed Original ResearchIncreased 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 spectrometryPatientsThreshold dose for intravenous nicotine self-administration in young adult non-dependent smokers
MacLean RR, DeVito EE, Eid T, Parida S, Gueorguieva R, Sofuoglu M. Threshold dose for intravenous nicotine self-administration in young adult non-dependent smokers. Psychopharmacology 2021, 238: 2083-2090. PMID: 33796907, PMCID: PMC8715498, DOI: 10.1007/s00213-021-05833-8.Peer-Reviewed Original ResearchConceptsDose of nicotineNicotine reinforcementHigh doseSubjective effectsHuman laboratory studiesYoung adult smokersNicotine self-administration modelNon-dependent smokersOvernight nicotine abstinenceEffects modelSelf-administration modelSelf-administration procedureNicotine doseAdult smokersMethodsYoung adultsObjectivesThe current studyNicotine abstinenceNicotine addictionHigh dosesLow dosesPlaceboThreshold doseReinforcement thresholdTobacco productsDoseNetwork-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 regionsAltered hippocampal astroglial metabolism is associated with aging and preserved spatial learning and memory
Ebersole J, Rose G, Eid T, Behar K, Patrylo P. Altered hippocampal astroglial metabolism is associated with aging and preserved spatial learning and memory. Neurobiology Of Aging 2021, 102: 188-199. PMID: 33774381, DOI: 10.1016/j.neurobiolaging.2021.02.015.Peer-Reviewed Original ResearchConceptsArtificial cerebrospinal fluidAstroglial metabolismNeural metabolismHippocampus-dependent cognitive functionGlutamate-glutamine cyclingFischer 344 ratsHippocampus-dependent learningAge-related decreaseAU ratsCognitive functionLiquid chromatography-tandem mass spectroscopyGlutamatergic neurotransmissionCognitive declineHippocampal slicesSpatial learningCognitive statusHippocampal subregionsCerebrospinal fluidImpaired ratsMetabolism correlateYoung adultsCompensatory changesRatsC-glucoseMemory
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
1999
Ultrastructure and immunocytochemical distribution of GABA in layer III of the rat medial entorhinal cortex following aminooxyacetic acid-induced seizures
Eid T, Schwarcz R, Ottersen OP. Ultrastructure and immunocytochemical distribution of GABA in layer III of the rat medial entorhinal cortex following aminooxyacetic acid-induced seizures. Experimental Brain Research 1999, 125: 463-475. PMID: 10323293, DOI: 10.1007/s002210050704.Peer-Reviewed Original ResearchConceptsTemporal lobe epilepsyEntorhinal cortexLayer IIIMedial entorhinal cortexAminooxyacetic acidGABA-immunoreactive neuronsTemporal lobe seizuresAcid-induced seizuresGABA-like immunoreactivityDifferent animal modelsHippocampal region CA1AOAA injectionSimilar neuropathologySwollen dendritesBehavioral seizuresGABA neuronsLobe epilepsyNeuronal profilesNeuropathological changesPyramidal neuronsNerve terminalsAxon terminalsRat medialDendritic spinesLight microscopic preparations
1997
Neuronal damage after the injection of amino-oxyacetic acid into the rat entorhinal cortex: a silver impregnation study
Du F, Eid T, Schwarcz R. Neuronal damage after the injection of amino-oxyacetic acid into the rat entorhinal cortex: a silver impregnation study. Neuroscience 1997, 82: 1165-1178. PMID: 9466438, DOI: 10.1016/s0306-4522(97)00354-0.Peer-Reviewed Original ResearchConceptsSilver-stained neuronsTemporal lobe epilepsyEntorhinal cortexAcid injectionNeuronal damageLobe epilepsyLayer IIIProlonged seizure activitySilver impregnation studyReactive glial cellsPattern of neurodegenerationHippocampal CA1 fieldLateral amygdaloid nucleusRat entorhinal cortexAminooxyacetic acidAmino-oxyacetic acidMedial entorhinal cortexDegenerated neuronsNeuropathological consequencesDamaged neuronsSeizure activityAmygdaloid nucleusMost neuronsNeuronal deathCA1 fieldSleep/waking effects of a selective 5-HT1A receptor agonist given systemically as well as perfused in the dorsal raphe nucleus in rats
Bjorvatn B, Fagerland S, Eid T, Ursin R. Sleep/waking effects of a selective 5-HT1A receptor agonist given systemically as well as perfused in the dorsal raphe nucleus in rats. Brain Research 1997, 770: 81-88. PMID: 9372206, DOI: 10.1016/s0006-8993(97)00758-0.Peer-Reviewed Original ResearchConceptsDorsal raphe nucleusSlow-wave sleepRaphe nucleusSleep/Rapid eye movement (REM) sleepREM sleep increaseDeep slow wave sleepEye movement sleepArtificial cerebrospinal fluidMesopontine neuronsAutoreceptor stimulationReceptor agonistMovement sleepREM sleepCerebrospinal fluidWave sleepSleep increasesDPATPerfusionSleepAgonistsFourfold increaseBehavioral syndromeSyndromeNeurotransmission
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 elevationDifferential neuronal vulnerability to amino-oxyacetate and quinolinate in the rat parahippocampal region
Eid T, Du F, Schwarcz R. Differential neuronal vulnerability to amino-oxyacetate and quinolinate in the rat parahippocampal region. Neuroscience 1995, 68: 645-656. PMID: 8577365, DOI: 10.1016/0306-4522(95)00183-j.Peer-Reviewed Original ResearchConceptsAcute behavioral seizuresBehavioral seizuresDizocilpine maleateNeuronal lossEntorhinal cortexEndogenous N-methyl-D-aspartate receptor agonistN-methyl-D-aspartate receptor antagonist dizocilpine maleateLayer IIIN-methyl-D-aspartate receptor agonistParahippocampal regionN-methyl-D-aspartate (NMDA) receptor subtypeDifferential neuronal vulnerabilityDorsal perirhinal cortexPreferential neuronal lossTemporal lobe epilepsyChloral hydrate anesthesiaLower anesthetic doseNeuropathological sequelaeLobe epilepsyNeuropathological changesLayer VNeuronal vulnerabilityPreferential degenerationAnesthetic doseReceptor agonist