2012
Bursting as a source of non‐linear determinism in the firing patterns of nigral dopamine neurons
Jeong J, Shi W, Hoffman R, Oh J, Gore JC, Bunney BS, Peterson BS. Bursting as a source of non‐linear determinism in the firing patterns of nigral dopamine neurons. European Journal Of Neuroscience 2012, 36: 3214-3223. PMID: 22831464, PMCID: PMC3490015, DOI: 10.1111/j.1460-9568.2012.08238.x.Peer-Reviewed Original ResearchConceptsNigral dopamine neuronsDA neuronsFiring patternsComplex firing patternsDopamine neuronsBursting activityChloral hydrate-anesthetized ratsHalothane-anesthetized ratsRat substantia nigraReward-related learningSubstantia nigraPhasic burstsFiring activityNeuronsBursting neuronsRatsStochastic firing patternsVivoNon-linear deterministic structureActivityNigra
2007
Oscillatory firing of dopamine neurons: Differences between cells in the substantia nigra and ventral tegmental area
Zhang D, Yang S, Jin G, Bunney B, Shi W. Oscillatory firing of dopamine neurons: Differences between cells in the substantia nigra and ventral tegmental area. Synapse 2007, 62: 169-175. PMID: 18081182, DOI: 10.1002/syn.20479.Peer-Reviewed Original ResearchConceptsVentral tegmental areaDA neuronsSubstantia nigraDopamine neuronsTegmental areaSlow oscillationsChloral hydrate-anesthetized ratsSN DA neuronsVTA DA neuronsDegree of burstingVariability of firingAfferent inputAdjacent substantia nigraOscillatory firingFiring rateNeuronsNeuronal oscillationsNigraCellsFiringRatsBrainImportant roleFunctional Coupling between the Prefrontal Cortex and Dopamine Neurons in the Ventral Tegmental Area
Gao M, Liu C, Yang S, Jin G, Bunney B, Shi W. Functional Coupling between the Prefrontal Cortex and Dopamine Neurons in the Ventral Tegmental Area. Journal Of Neuroscience 2007, 27: 5414-5421. PMID: 17507563, PMCID: PMC6672349, DOI: 10.1523/jneurosci.5347-06.2007.Peer-Reviewed Original ResearchConceptsVentral tegmental areaVTA DA neuronsDA neuronsPrefrontal cortexPFC neuronsDopamine neuronsTegmental areaAction potential-dependent DA releaseSlow oscillationsChloral hydrate-anesthetized ratsIntra-PFC infusionsFunctional couplingPFC terminalsVTA DAGlutamate releaseDA releaseExcitatory influenceRelay neuronsInhibitory influenceCell activityBrain functionNeuronsImportant new insightsCortexMultiple pathwaysClozapine Blocks D-Amphetamine-Induced Excitation of Dopamine Neurons in the Ventral Tegmental Area
Shi W, Zhang X, Pun C, Bunney B. Clozapine Blocks D-Amphetamine-Induced Excitation of Dopamine Neurons in the Ventral Tegmental Area. Neuropsychopharmacology 2007, 32: 1922-1928. PMID: 17299514, DOI: 10.1038/sj.npp.1301334.Peer-Reviewed Original ResearchConceptsD2-like receptorsDA neuronsVentral tegmental areaD-amphetamineDA receptorsExcitatory effectsTegmental areaΑ1 receptor antagonist prazosinAtypical antipsychotic drug clozapineChloral hydrate-anesthetized ratsTypical antipsychotic drug haloperidolCentral dopamine transmissionCurrent antipsychotic drugsReceptor antagonist prazosinAntipsychotic drug haloperidolAntipsychotic drug clozapineAntagonist prazosinExcitatory pathwaysDA transmissionDopamine neuronsΑ1 receptorsSystemic administrationAntipsychotic drugsExcitatory inputsIncomplete blockade
2000
Enhancement of NMDA‐induced current by the putative NR2B selective antagonist ifenprodil
Zhang X, Bunney B, Shi W. Enhancement of NMDA‐induced current by the putative NR2B selective antagonist ifenprodil. Synapse 2000, 37: 56-63. PMID: 10842351, DOI: 10.1002/(sici)1098-2396(200007)37:1<56::aid-syn6>3.0.co;2-d.Peer-Reviewed Original ResearchMeSH Keywords2-Amino-5-phosphonovalerateAnimalsDizocilpine MaleateDose-Response Relationship, DrugDrug SynergismElectrophysiologyExcitatory Amino Acid AgonistsExcitatory Amino Acid AntagonistsGlycineKynurenic AcidMaleMembrane PotentialsN-MethylaspartateOrgan Culture TechniquesPiperidinesPrefrontal CortexPyramidal CellsRatsRats, Sprague-DawleyReceptors, N-Methyl-D-AspartateSpermineConceptsLow NMDA concentrationsNMDA currentsNMDA concentrationReceptor affinityNMDA receptor affinityEffects of ifenprodilNR2B-selective antagonist ifenprodilEnhancement of NMDARat brain slicesNMDA receptorsAntagonist selectiveBrain slicesSubcortical areasNR2B subunitNMDANoncompetitive antagonistIfenprodilCGP37849Same concentrationKynurenatePrevious studiesAntagonistReceptorsDual Effects of d-Amphetamine on Dopamine Neurons Mediated by Dopamine and Nondopamine Receptors
Shi W, Pun C, Zhang X, Jones M, Bunney B. Dual Effects of d-Amphetamine on Dopamine Neurons Mediated by Dopamine and Nondopamine Receptors. Journal Of Neuroscience 2000, 20: 3504-3511. PMID: 10777813, PMCID: PMC6773133, DOI: 10.1523/jneurosci.20-09-03504.2000.Peer-Reviewed Original ResearchConceptsD2-like receptorsD-amphetamineDA cellsSelective D2 antagonist racloprideVivo single-unit recordingsFiring rateAlpha-antagonist phenoxybenzamineAlpha1-antagonist prazosinAlpha2 antagonist idazoxanD2 antagonist racloprideDA cell firingSingle-unit recordingsRelated psychostimulantsAntagonist idazoxanAntagonist phenoxybenzamineDA receptorsAntagonist prazosinAntagonist racloprideExcitatory effectsAlpha1 receptorsDopamine neuronsDopamine releaseCell firingInhibitory effectReceptorsAnatomic basis of sequence‐dependent predictability exhibited by nigral dopamine neuron firing patterns
Hoffman R, Shi W, Bunney B. Anatomic basis of sequence‐dependent predictability exhibited by nigral dopamine neuron firing patterns. Synapse 2000, 39: 133-138. PMID: 11180500, DOI: 10.1002/1098-2396(200102)39:2<133::aid-syn4>3.0.co;2-k.Peer-Reviewed Original Research
1999
Endogenous DA‐mediated feedback inhibition of DA neurons: Involvement of both D1‐ and D2‐like receptors
Shi W, Pun C, Smith P, Bunney B. Endogenous DA‐mediated feedback inhibition of DA neurons: Involvement of both D1‐ and D2‐like receptors. Synapse 1999, 35: 111-119. PMID: 10611636, DOI: 10.1002/(sici)1098-2396(200002)35:2<111::aid-syn3>3.0.co;2-7.Peer-Reviewed Original ResearchConceptsDA neuronsLike receptorsDA cellsEndogenous DAChloral hydrate-anesthetized ratsNigral DA cellsD2-like receptorsSingle-unit recordingsCerveau isolé preparationFeedback inhibitionParkinsonian animalsAntagonist racloprideAntagonist SCH23390DA releaseEndogenous dopamineD-amphetamineParkinson's diseaseUnit recordingsSCH23390Receptor activationBaseline activityReceptorsChloral hydrateNeuronsConcurrent activationOpposite modulation of cortical N-methyl-d-aspartate receptor-mediated responses by low and high concentrations of dopamine
Zheng P, Zhang X, Bunney B, Shi W. Opposite modulation of cortical N-methyl-d-aspartate receptor-mediated responses by low and high concentrations of dopamine. Neuroscience 1999, 91: 527-535. PMID: 10366010, DOI: 10.1016/s0306-4522(98)00604-6.Peer-Reviewed Original ResearchMeSH Keywords1-Methyl-3-isobutylxanthine2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineAlpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic AcidAnimalsBenzazepinesDizocilpine MaleateDopamineDopamine AgonistsDopamine AntagonistsDose-Response Relationship, DrugExcitatory Amino Acid AntagonistsIn Vitro TechniquesMaleMembrane PotentialsPrefrontal CortexPyramidal CellsQuinoxalinesQuinpiroleRatsRats, Sprague-DawleyReceptors, N-Methyl-D-AspartateConceptsN-methyl-D-aspartate functionN-methyl-D-aspartate currentsN-methyl-D-aspartate (NMDA) receptor-mediated transmissionN-methyl-D-aspartate receptor-mediated responsesN-methyl-D-aspartate receptorsHigh concentrations dopamineReceptor-mediated transmissionD2 agonist quinpiroleD1 agonist SKF38393D-aspartate antagonistD1-like receptorsGlutamate-mediated neurotransmissionD2-like receptorsPresence of tetrodotoxinEffects of dopamineReceptor-mediated responsesWhole-cell recordingsD-aspartate agonistMedial prefrontal cortexBrief local applicationDizocilpine maleateAgonist SKF38393Concentration of dopamineCortical dopamineGlutamate transmission
1997
D1–D2 Interaction in Feedback Control of Midbrain Dopamine Neurons
Shi W, Smith P, Pun C, Millet B, Bunney B. D1–D2 Interaction in Feedback Control of Midbrain Dopamine Neurons. Journal Of Neuroscience 1997, 17: 7988-7994. PMID: 9315916, PMCID: PMC6793911, DOI: 10.1523/jneurosci.17-20-07988.1997.Peer-Reviewed Original ResearchConceptsD2-like receptorsDA cellsDA autoreceptorsDA neuronsD1 agonistLow dosesDopamine D1-like receptorsD1 inhibitionD1 effectNigral DA cellsMidbrain DA neuronsD2 agonist quinpiroleD1-like receptorsDA receptor subtypesMidbrain dopamine neuronsOnly low dosesDA receptorsEndogenous DAAgonist quinpiroleD2 agonistIntranigral applicationDopamine neuronsReceptor subtypesRat preparationTarget neuronsCharacterization of dopamine‐induced depolarization of prefrontal cortical neurons
Shi W, Zheng P, Liang X, Bunney B. Characterization of dopamine‐induced depolarization of prefrontal cortical neurons. Synapse 1997, 26: 415-422. PMID: 9215600, DOI: 10.1002/(sici)1098-2396(199708)26:4<415::aid-syn9>3.0.co;2-9.Peer-Reviewed Original ResearchConceptsEffects of dopaminePFC neuronsDA agonistsPrefrontal cortexAtypical antipsychotic drug clozapinePrefrontal cortical neuronsRat brain slicesAntipsychotic drug clozapineWhole-cell recordingsPFC pyramidal cellsSynaptic blockadeDA receptorsBeta antagonistDA antagonistsSubstantia nigraCortical neuronsPyramidal cellsBrain slicesDrug clozapineCell recordingsNeuronsAntagonistNonspecific mechanismsDopamineDepolarizationDopamine-cell depolarization block as a model for the therapeutic actions of antipsychotic drugs
Grace A, Bunney B, Moore H, Todd C. Dopamine-cell depolarization block as a model for the therapeutic actions of antipsychotic drugs. Trends In Neurosciences 1997, 20: 31-37. PMID: 9004417, DOI: 10.1016/s0166-2236(96)10064-3.Peer-Reviewed Original ResearchConceptsDepolarization blockAntipsychotic drugsDopamine systemNigrostriatal dopamine systemWeeks of treatmentExtrapyramidal side effectsAntipsychotic drug efficacyDopamine receptor antagonistDrug treatment resultsMesolimbic dopamine neuronsTreatment of schizophreniaDopamine neuron firingReceptor blockadeDopamine neuronsTherapeutic impactSide effectsClinical actionsDrug AdministrationTherapeutic efficacyTreatment resultsDrug efficacyTherapeutic actionPotential mechanismsDrugsEfficacy
1996
Effects of Lesions in the Medial Prefrontal Cortex on the Activity of Midbrain Dopamine Neurons
Shim S, Bunney B, Shi W. Effects of Lesions in the Medial Prefrontal Cortex on the Activity of Midbrain Dopamine Neurons. Neuropsychopharmacology 1996, 15: 437-441. PMID: 8914116, DOI: 10.1016/s0893-133x(96)00052-8.Peer-Reviewed Original ResearchConceptsVentral tegmental areaDA neuronsPrefrontal cortexSubstantia nigraPFC lesionsBursting activityFiring rateActive DA cellsSN DA neuronsActive DA neuronsMidbrain dopamine neuronsSingle-unit recordingsMedial prefrontal cortexDA cellsDopamine neuronsTegmental areaLocal injectionIbotenic acidUnit recordingsLesionsSame lesionNeuronsRatsActivityCortexChronic morphine induces visible changes in the morphology of mesolimbic dopamine neurons.
Sklair-Tavron L, Shi W, Lane S, Harris H, Bunney B, Nestler E. Chronic morphine induces visible changes in the morphology of mesolimbic dopamine neurons. Proceedings Of The National Academy Of Sciences Of The United States Of America 1996, 93: 11202-11207. PMID: 8855333, PMCID: PMC38308, DOI: 10.1073/pnas.93.20.11202.Peer-Reviewed Original ResearchConceptsVTA dopamine neuronsVentral tegmental areaChronic morphine treatmentDopamine neuronsMorphine treatmentBrain regionsBrain-derived neurotrophic factorIntra-VTA infusionMorphine-treated ratsOpioid receptor antagonistChronic opiate exposureMesolimbic dopamine neuronsFluorescent dye Lucifer yellowMesolimbic dopamine functionMesolimbic dopamine systemImportant neural substrateDye Lucifer yellowNondopaminergic neuronsVTA neuronsChronic morphineOpiate exposureConcomitant treatmentDopaminergic neuronsNeurotrophic factorReceptor antagonistRole of the Amygdala in the Coordination of Behavioral, Neuroendocrine, and Prefrontal Cortical Monoamine Responses to Psychological Stress in the Rat
Goldstein L, Rasmusson A, Bunney B, Roth R. Role of the Amygdala in the Coordination of Behavioral, Neuroendocrine, and Prefrontal Cortical Monoamine Responses to Psychological Stress in the Rat. Journal Of Neuroscience 1996, 16: 4787-4798. PMID: 8764665, PMCID: PMC6579011, DOI: 10.1523/jneurosci.16-15-04787.1996.Peer-Reviewed Original ResearchConceptsAmygdala lesionsMonoaminergic systemsMetabolic activationAdrenocortical activationStress-induced freezing behaviorStress-induced exacerbationStress-induced freezingPosttraumatic stress disorderAnteromedial prefrontal cortexNorepinephrine metabolismMonoamine responseAfferent controlNeuroendocrine componentBilateral NMDAPFC dopamineSchizophrenic symptomsCentral nucleusMild stressPrefrontal cortexStress disorderPsychological stressLesionsDopamineStress activationUltrasonic vocalizations
1995
Ritanserin, a 5-HT2A/2C antagonist, reverses direct dopamine agonist-induced inhibition of midbrain dopamine neurons.
Shi W, Nathaniel P, Bunney B. Ritanserin, a 5-HT2A/2C antagonist, reverses direct dopamine agonist-induced inhibition of midbrain dopamine neurons. Journal Of Pharmacology And Experimental Therapeutics 1995, 274: 735-40. PMID: 7636736.Peer-Reviewed Original ResearchConceptsEffects of ritanserinBasal firing rateDA autoreceptorsDA neuronsDA agonistsP-chlorophenylalanineSubstantia nigra DA neuronsSingle-unit recording techniquesChloral hydrate-anesthetized ratsFiring rateDA agonist quinpiroleDirect DA agonistsIndirect DA agonistPostsynaptic D2 receptorsExtrapyramidal side effectsD2-like receptorsSignificant therapeutic effectAgonist-induced inhibitionMidbrain dopamine neuronsMidbrain dopamine systemAgonist quinpiroleDA antagonistsMDL 100907Receptor antagonistDopamine neuronsNonlinear sequence-dependent structure of nigral dopamine neuron interspike interval firing patterns
Hoffman R, Shi W, Bunney B. Nonlinear sequence-dependent structure of nigral dopamine neuron interspike interval firing patterns. Biophysical Journal 1995, 69: 128-137. PMID: 7669889, PMCID: PMC1236231, DOI: 10.1016/s0006-3495(95)79882-4.Peer-Reviewed Original ResearchConceptsNonlinear deterministic structureDeterministic structureNumber of degreesDopamine neuronsDynamical analysisEffect of nonstationarityRandom processFiring patternsNigral dopamine neuronsRat substantia nigraSubstantia nigraSynaptic inputsISI sequencesNeuron responsesTime seriesNeural circuit interactionsSequence-dependent structureNeuronsFiring modesCircuit interactionsOverall predictabilityNonstationarity
1994
5‐HT1a agonist ±‐ 8‐OH‐DPAT modulates basal and stress‐induced changes in medial prefrontal cortical dopamine
Rasmusson A, Goldstein L, Deutch A, Bunney B, Roth R. 5‐HT1a agonist ±‐ 8‐OH‐DPAT modulates basal and stress‐induced changes in medial prefrontal cortical dopamine. Synapse 1994, 18: 218-224. PMID: 7855734, DOI: 10.1002/syn.890180307.Peer-Reviewed Original ResearchConceptsDopamine utilizationMedial prefrontal cortexStress-induced changesClinical efficacyMedial prefrontal cortical dopamineMicrograms/Prefrontal cortexAnxiety disordersPrefrontal cortical dopamineFootshock-induced increaseObserved clinical efficacyDopamine terminal fieldsCortical dopamineFootshock stressExtracellular dopamineHuman anxiety disordersNucleus accumbensSame doseTerminal fieldsEx vivo brain tissueNeurochemical analysisDopamine systemDPATAgonistsBrain tissueThe NMDA glycine site antagonist (+)-HA-966 selectively regulates conditioned stress-induced metabolic activation of the mesoprefrontal cortical dopamine but not serotonin systems: a behavioral, neuroendocrine, and neurochemical study in the rat
Goldstein L, Rasmusson A, Bunney B, Roth R. The NMDA glycine site antagonist (+)-HA-966 selectively regulates conditioned stress-induced metabolic activation of the mesoprefrontal cortical dopamine but not serotonin systems: a behavioral, neuroendocrine, and neurochemical study in the rat. Journal Of Neuroscience 1994, 14: 4937-4950. PMID: 8046462, PMCID: PMC6577203, DOI: 10.1523/jneurosci.14-08-04937.1994.Peer-Reviewed Original ResearchConceptsStress-induced increaseNMDA glycine-site antagonistsDA utilizationGlycine modulatory siteGlycine site antagonistHA-966Conditioned stressPrefrontal cortexCortical dopamineSite antagonistNucleus accumbensControl animalsModulatory siteMedial prefrontal cortical dopamineLateral prefrontal cortexPrefrontal cortical dopamineSerum corticosterone levelsNMDA receptor complexPost-traumatic stress disorderMedial prefrontal cortexNeurotransmitter ratiosRegional dopamineSerotonin utilizationSerum corticosteroneNMDA receptorsPreferential activation of dopamine overflow in prefrontal cortex produced by chronic clozapine treatment
Youngren K, Moghaddam B, Bunney B, Roth R. Preferential activation of dopamine overflow in prefrontal cortex produced by chronic clozapine treatment. Neuroscience Letters 1994, 165: 41-44. PMID: 8015734, DOI: 10.1016/0304-3940(94)90704-8.Peer-Reviewed Original ResearchConceptsMedial prefrontal cortexChronic treatmentNucleus accumbensPrefrontal cortexChronic clozapine treatmentBasal dopamine releaseExtracellular dopamine levelsChronic clozapineClozapine treatmentIntracerebral microdialysisAcute doseDopaminergic toneDopamine levelsDopamine releaseExtracellular dopamineRat striatumDopamine overflowClozapineBrain regionsPreferential activationStriatumAccumbensCortexTreatmentMicrodialysis