2007
Striatal dopamine transporters correlate with simple reaction time in elderly subjects
van Dyck CH, Avery RA, MacAvoy MG, Marek KL, Quinlan DM, Baldwin RM, Seibyl JP, Innis RB, Arnsten AF. Striatal dopamine transporters correlate with simple reaction time in elderly subjects. Neurobiology Of Aging 2007, 29: 1237-1246. PMID: 17363113, PMCID: PMC3523216, DOI: 10.1016/j.neurobiolaging.2007.02.012.Peer-Reviewed Original ResearchConceptsStriatal DAT availabilityDAT availabilitySimple reaction timeStriatal dopamine transporter availabilityNigrostriatal dopamine systemNigrostriatal dopaminergic functionStriatal dopamine transporterMotor performanceDopamine transporter availabilityHealthy elderly individualsBrain uptakeDopaminergic functionAdvanced ageElderly subjectsContribution of ageTransporter availabilityHealthy volunteersElderly individualsDopamine systemCarbomethoxy-3betaNeuropsychological evaluationDopamine transporterMotor measuresNeurobiological substratesAge
2000
Equilibrium modeling of 5-ht2a receptors with [18f]deuteroaltanserin and pet: feasibility of a constant infusion paradigm
van Dyck C, Soares J, Tan P, Staley J, Baldwin R, Amici L, Fu X, Garg P, Seibyl J, Charney D, Innis R. Equilibrium modeling of 5-ht2a receptors with [18f]deuteroaltanserin and pet: feasibility of a constant infusion paradigm. Nuclear Medicine And Biology 2000, 27: 715-722. PMID: 11150702, DOI: 10.1016/s0969-8051(00)00160-8.Peer-Reviewed Original ResearchConceptsSpecific brain uptakeConstant infusion paradigmBrain uptakeInfusion paradigmConstant infusionPromising positron emission tomography (PET) ligandPositron emission tomography (PET) ligandVenous blood samplingHealthy male subjectsSerotonin 2A receptorStable radiotracerCerebellar ratioInfusion periodBlood samplingTomography ligandH postinjectionTime-activity curvesParent tracerLinear regression analysisMale subjectsPET radioligandSlow metabolismHuman subjectsBrain activityRegression analysisAge-related decline in central serotonin transporter availability with [123I]β-CIT SPECT
van Dyck C, Malison R, Seibyl J, Laruelle M, Klumpp H, Zoghbi S, Baldwin R, Innis R. Age-related decline in central serotonin transporter availability with [123I]β-CIT SPECT. Neurobiology Of Aging 2000, 21: 497-501. PMID: 10924762, DOI: 10.1016/s0197-4580(00)00152-4.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedAged, 80 and overAgingBrain ChemistryBrain StemCarrier ProteinsCocaineDiencephalonFemaleHumansIodine RadioisotopesMaleMembrane GlycoproteinsMembrane Transport ProteinsMiddle AgedNerve Tissue ProteinsReference ValuesSerotonin Plasma Membrane Transport ProteinsTomography, Emission-Computed, Single-PhotonConceptsSERT availabilitySerotonin transporterCentral serotonin transporter availabilityHealthy control subjectsSerotonin transporter availabilitySignificant inverse correlationCentral serotonin transportersAge range 18Single photon emissionBeta-carbomethoxy-3 betaEffect of ageAge-related declineBrain uptakeCIT SPECTControl subjectsPostmortem studiesTransporter availabilityHuman brainstemLinear regression analysisInverse correlationAgeHuman subjectsRegression analysisPhoton emissionPresent study
1999
[123I]Iomazenil SPECT benzodiazepine receptor imaging in schizophrenia
Verhoeff N, Soares J, D’Souza C, Gil R, Degen K, Abi-Dargham A, Zoghbi S, Fujita M, Rajeevan N, Seibyl J, Krystal J, van Dyck C, Charney D, Innis R. [123I]Iomazenil SPECT benzodiazepine receptor imaging in schizophrenia. Psychiatry Research 1999, 91: 163-173. PMID: 10641580, DOI: 10.1016/s0925-4927(99)00027-x.Peer-Reviewed Original ResearchConceptsDuration of illnessHealthy control subjectsControl subjectsGamma-aminobutyric acidLeft precentral gyrusSuperior occipital gyrusPANSS scoresPrecentral gyrusOccipital gyrusSignificant differencesTotal brain uptakeNon-smoking patientsGray matter atrophyConstant infusion paradigmPathophysiology of schizophreniaCortical brain regionsSingle photon emissionTypical antipsychoticsAtypical antipsychoticsCigarette smokingInhibitory neurotransmissionBrain uptakeInfusion paradigmMatter atrophyPostmortem studies
1998
Reduced brain serotonin transporter availability in major depression as measured by [123I]-2β-carbomethoxy-3β-(4-iodophenyl)tropane and single photon emission computed tomography
Malison R, Price L, Berman R, van Dyck C, Pelton G, Carpenter L, Sanacora G, Owens M, Nemeroff C, Rajeevan N, Baldwin R, Seibyl J, Innis R, Charney D. Reduced brain serotonin transporter availability in major depression as measured by [123I]-2β-carbomethoxy-3β-(4-iodophenyl)tropane and single photon emission computed tomography. Biological Psychiatry 1998, 44: 1090-1098. PMID: 9836013, DOI: 10.1016/s0006-3223(98)00272-8.Peer-Reviewed Original ResearchMeSH KeywordsAdultAntidepressive AgentsBrainBrain StemCarrier ProteinsCocaineDepressive DisorderFemaleHumansMaleMembrane GlycoproteinsMembrane Transport ProteinsMiddle AgedNerve Tissue ProteinsParoxetinePsychiatric Status Rating ScalesSerotoninSerotonin Plasma Membrane Transport ProteinsTomography, Emission-Computed, Single-PhotonConceptsDepressed patientsMajor depressionHealthy subjectsBrain serotonin transporter availabilitySerotonin transporterBeta-CIT SPECTDensity of brainPost-mortem brain tissuePathophysiology of depressionSerotonin transporter availabilityUnipolar major depressionBeta-CIT bindingSingle photon emissionSerotonergic neuronsBrain uptakeSERT availabilityTransporter availabilityBeta-CITBrain tissueCarbomethoxy-3βPatientsBlood plateletsDepressionPhoton emissionSignificant reduction
1996
Human biodistribution and dosimetry of the SPECT D2 dopamine receptor radioligand [123I]IBF
van Dyck C, Seibyl J, Stubbs J, Zoghbi S, Wisniewski G, Baldwin R, Zea-Ponce Y, Charney D, Hoffer P, Innis R. Human biodistribution and dosimetry of the SPECT D2 dopamine receptor radioligand [123I]IBF. Nuclear Medicine And Biology 1996, 23: 9-16. PMID: 9004921, DOI: 10.1016/0969-8051(95)02003-9.Peer-Reviewed Original ResearchConceptsDopamine receptor radioligandBrain uptakeReceptor radioligandPromising SPECT agentMSv/MBqUrinary excretion fractionHigh brain uptakePeak brain uptakeUrinary bladder wallD2 dopamine receptorsHealthy human subjectsRapid urinary excretionSingle photon emissionMedical Internal Radiation Dose (MIRD) schemaHuman biodistributionUrinary excretionDopamine receptorsFavorable dosimetryBladder wallExcretion fractionRenal systemInjected activitySPECT agentHuman subjectsDose estimates