1999
Striatal dopaminergic correlates of stable parkinsonism and degree of recovery in old-world primates one year after MPTP treatment
Elsworth J, Taylor J, Sladek J, Collier T, Redmond D, Roth R. Striatal dopaminergic correlates of stable parkinsonism and degree of recovery in old-world primates one year after MPTP treatment. Neuroscience 1999, 95: 399-408. PMID: 10658619, DOI: 10.1016/s0306-4522(99)00437-6.Peer-Reviewed Original ResearchConceptsHomovanillic acid/dopamine ratioMPTP treatmentStriatal dopamine levelsDopamine levelsDopamine lossDopamine depletionDopamine ratioStriatal subregionsNucleus accumbensCaudate nucleusDopamine concentrationsOne-yearSeverity categoriesDopamine neuron integrityVentromedial caudate nucleusStriatal dopamine lossHomovanillic acid concentrationsStriatal dopaminergic functionMarked increaseNormal motor performancePaucity of dataMetabolic activityNon-human primatesParkinsonian disabilityTetrahydropyridine (MPTP) modelSpontaneous Blink Rates Correlate with Dopamine Levels in the Caudate Nucleus of MPTP-Treated Monkeys
Taylor J, Elsworth J, Lawrence M, Sladek J, Roth R, Redmond D. Spontaneous Blink Rates Correlate with Dopamine Levels in the Caudate Nucleus of MPTP-Treated Monkeys. Experimental Neurology 1999, 158: 214-220. PMID: 10448434, DOI: 10.1006/exnr.1999.7093.Peer-Reviewed Original ResearchConceptsCaudate nucleusConcentration of DAEye blink rateBlink rateDA ratioDopaminergic regulationD1 agonist dihydrexidineDA D2 receptorsDopaminergic neurotoxin MPTPSeverity of parkinsonismSpontaneous eye blink rateSpecific brain regionsAntiparkinsonian effectsDA depletionD2 agonistDopamine D1Dopamine levelsNeurotoxin MPTPD2 receptorsMPTPNormal animalsRostral portionSubcortical regionsBrain regionsVentromedial regionEnhanced responding for conditioned reward produced by intra-accumbens amphetamine is potentiated after cocaine sensitization
Taylor J, Horger B. Enhanced responding for conditioned reward produced by intra-accumbens amphetamine is potentiated after cocaine sensitization. Psychopharmacology 1999, 142: 31-40. PMID: 10102780, DOI: 10.1007/s002130050859.Peer-Reviewed Original ResearchConceptsIntra-accumbens amphetamineIntra-NAc amphetamineCocaine sensitizationLocomotor sensitizationNucleus accumbensCR leverLong-term neuronal adaptationsSaline-treated groupMesolimbic dopamine systemStimulant drug useSaline infusionSaline injectionDopamine systemPsychomotor stimulantsDrug useNeuronal adaptationConditioned rewardStimulant drugsAmphetaminePrior exposureSensitizationTest daySeparate groupsNCR leverPredictive associations
1998
In vivo expression of therapeutic human genes for dopamine production in the caudates of MPTP-treated monkeys using an AAV vector
During M, Samulski R, Elsworth J, Kaplitt M, Leone P, Xiao X, Li J, Freese A, Taylor J, Roth R, Sladek J, O’Malley K, Redmond D. In vivo expression of therapeutic human genes for dopamine production in the caudates of MPTP-treated monkeys using an AAV vector. Gene Therapy 1998, 5: 820-827. PMID: 9747462, DOI: 10.1038/sj.gt.3300650.Peer-Reviewed Original ResearchMeSH Keywords1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridineAnimalsAromatic-L-Amino-Acid DecarboxylasesChlorocebus aethiopsDependovirusDopamineDopamine AgentsGene ExpressionGene Transfer TechniquesGenetic VectorsHumansImmunohistochemistryMaleParkinson DiseaseTrigeminal Caudal NucleusTyrosine 3-MonooxygenaseConceptsTyrosine hydroxylaseStriatal cellsDopamine-depleted monkeysAdeno-associated virus vectorProduction of dopamineParkinsonian monkeysTransient feverSevere hyperactivityStriatal dopaminePrimate neuronsStereotactic injectionHistological evidencePrimate modelInjection tractNeurotoxin MPTPDopamine productionParkinson's diseaseTreatment groupsSignificant toxicityBehavioral effectsVivo gene therapyElevated levelsBiochemical effectsFirst dayMonkeysUpregulation of striatal D2 receptors in the MPTP-treated vervet monkey is reversed by grafts of fetal ventral mesencephalon: an autoradiographic study
Elsworth J, Brittan M, Taylor J, Sladek J, Redmond D, Innis R, Zea-Ponce Y, Roth R. Upregulation of striatal D2 receptors in the MPTP-treated vervet monkey is reversed by grafts of fetal ventral mesencephalon: an autoradiographic study. Brain Research 1998, 795: 55-62. PMID: 9622593, DOI: 10.1016/s0006-8993(98)00252-2.Peer-Reviewed Original ResearchMeSH Keywords1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridineAnimalsAutoradiographyBenzofuransBrain Tissue TransplantationChlorocebus aethiopsCorpus StriatumDisease Models, AnimalDopamine AgentsFetal Tissue TransplantationImage Processing, Computer-AssistedIodine RadioisotopesMesencephalonParkinson Disease, SecondaryRadioligand AssayReceptors, Dopamine D2Up-RegulationConceptsFetal ventral mesencephalonD2 receptor bindingVentral mesencephalonDorsal striatumAutoradiographic studyDopamine uptake site densityPostsynaptic dopamine receptor activationVentral striatumDopamine concentrationsStriatal D2 receptor bindingReceptor bindingD2 receptor upregulationPostsynaptic dopamine transmissionTetrahydropyridine-treated monkeysStriatal D2 receptorsDopamine receptor activationPrevious autoradiographic studiesAfrican green monkeysDonor neuronsIntrastriatal graftingParkinsonian primatesNeural transplantationReceptor upregulationStriatal circuitryMotor function
1996
Early gestational mesencephalon grafts, but not later gestational mesencephalon, cerebellum or sham grafts, increase dopamine in caudate nucleus of MPTP-treated monkeys
Elsworth J, Sladek J, Taylor J, Collier T, Redmond D, Roth R. Early gestational mesencephalon grafts, but not later gestational mesencephalon, cerebellum or sham grafts, increase dopamine in caudate nucleus of MPTP-treated monkeys. Neuroscience 1996, 72: 477-484. PMID: 8737417, DOI: 10.1016/0306-4522(95)00564-1.Peer-Reviewed Original ResearchConceptsFetal ventral mesencephalonVentral mesencephalonCaudate nucleusGraft siteDopamine neuronsDopamine concentrationsBehavioral recoveryTyrosine hydroxylase-positive neuronsHomovanillic acid/dopamine ratioFetal dopamine neuronsGrafted dopamine neuronsIntrastriatal transplantsParkinsonian primatesGrafted neuronsIntrastriatal transplantationGestational ageTransplant proceduresDopamine ratioDopamine productionSignificant elevationNucleus accumbensDopamine systemSham graftsGraftBrain regions
1991
D1 and D2 dopamine receptors independently regulate spontaneous blink rate in the vervet monkey.
Elsworth J, Lawrence M, Roth R, Taylor J, Mailman R, Nichols D, Lewis M, Redmond D. D1 and D2 dopamine receptors independently regulate spontaneous blink rate in the vervet monkey. Journal Of Pharmacology And Experimental Therapeutics 1991, 259: 595-600. PMID: 1682479.Peer-Reviewed Original ResearchConceptsD2 dopamine receptorsDopamine receptorsSpontaneous blink rateBlink ratePrior administrationSCH 23390D1 agonistPartial D1 agonistSpecific D1 antagonistSpecific D2 antagonistRole of D1Dose-dependent increaseSpontaneous eye blink rateFull D1 agonistSpecific D2 agonistReceptor-selective drugsAfrican green monkeysEye blink rateDopamine agonistsSKF 38393D2 agonistD1 antagonistD2 antagonistReceptor subtypesD2 receptorsDihydrexidine, a full dopamine D1 agonist, reduces MPTP-ioduced parkinsonism in monkeys
Taylor J, Lawrence M, Redmond D, Elsworth J, Roth R, Nichols D, Mailman R. Dihydrexidine, a full dopamine D1 agonist, reduces MPTP-ioduced parkinsonism in monkeys. European Journal Of Pharmacology 1991, 199: 389-391. PMID: 1680717, DOI: 10.1016/0014-2999(91)90508-n.Peer-Reviewed Original Research