2023
The regional pattern of age-related synaptic loss in the human brain differs from gray matter volume loss: in vivo PET measurement with [11C]UCB-J
Toyonaga T, Khattar N, Wu Y, Lu Y, Naganawa M, Gallezot J, Matuskey D, Mecca A, Pittman B, Dias M, Nabulsi N, Finnema S, Chen M, Arnsten A, Radhakrishnan R, Skosnik P, D’Souza D, Esterlis I, Huang Y, van Dyck C, Carson R. The regional pattern of age-related synaptic loss in the human brain differs from gray matter volume loss: in vivo PET measurement with [11C]UCB-J. European Journal Of Nuclear Medicine And Molecular Imaging 2023, 51: 1012-1022. PMID: 37955791, DOI: 10.1007/s00259-023-06487-8.Peer-Reviewed Original ResearchSynaptic densityAge-related decreaseMagnetic resonance imagingBlood flowAge-related synaptic lossGray matter volume lossSynaptic density lossPositron emission tomography (PET) ligandSynaptic vesicle glycoprotein 2AVivo PET measurementsMedial occipital cortexGray matter volumeAge-related neurodegenerationGray matter regionsCognitive normal subjectsAge-related changesSynaptic lossNerve terminalsWide age rangeOccipital cortexTomography ligandNormal subjectsGM volumeAge-related functional lossesMatter volume
2019
Norepinephrine transporter availability in brown fat is reduced in obesity: a human PET study with [11C] MRB
Sanchez-Rangel E, Gallezot JD, Yeckel CW, Lam W, Belfort-DeAguiar R, Chen MK, Carson RE, Sherwin R, Hwang JJ. Norepinephrine transporter availability in brown fat is reduced in obesity: a human PET study with [11C] MRB. International Journal Of Obesity 2019, 44: 964-967. PMID: 31636373, PMCID: PMC7259982, DOI: 10.1038/s41366-019-0471-4.Peer-Reviewed Original ResearchConceptsBrown adipose tissueDetectable brown adipose tissueDistribution volume ratioMultilinear reference tissue model 2Norepinephrine transporterSympathetic innervationNorepinephrine transporter availabilityHuman brown adipose tissueDense sympathetic innervationPET-CT imagingReference tissue model 2Human PET studiesSupraclavicular regionCaucasian womenTransporter availabilityOccipital cortexObesityTherapeutic targetAdipose tissueBrown fatPET studiesWomenInnervationSelective ligandsEnergy-dissipating propertiesImaging the Enzyme 11β-Hydroxysteroid Dehydrogenase Type 1 with PET: Evaluation of the Novel Radiotracer 11C-AS2471907 in Human Brain
Gallezot JD, Nabulsi N, Henry S, Pracitto R, Planeta B, Ropchan J, Lin SF, Labaree D, Kapinos M, Shirali A, Lara-Jaime T, Gao H, Matuskey D, Walzer M, Marek GJ, Bellaire S, Yuan N, Carson RE, Huang Y. Imaging the Enzyme 11β-Hydroxysteroid Dehydrogenase Type 1 with PET: Evaluation of the Novel Radiotracer 11C-AS2471907 in Human Brain. Journal Of Nuclear Medicine 2019, 60: 1140-1146. PMID: 30877174, DOI: 10.2967/jnumed.118.219766.Peer-Reviewed Original ResearchConceptsTest-retest variabilityNondisplaceable distribution volumeOccipital cortexEnzyme 11β-hydroxysteroid dehydrogenase type 1White matterDistribution volumeTreatment of depressionDehydrogenase type 1Large cortical regionsPosttraumatic stress disorderHuman brainAdditional scansIntraclass correlation coefficientAge-related cognitive functionBolus administrationFrontal cortexCaudate nucleusAdipose tissueTime-activity curvesNovel radiotracersGlucocorticoid levelsParietal cortexCortical regionsPattern of uptakeType 1
2015
Imaging human brown adipose tissue under room temperature conditions with 11C-MRB, a selective norepinephrine transporter PET ligand
Hwang JJ, Yeckel CW, Gallezot JD, Aguiar RB, Ersahin D, Gao H, Kapinos M, Nabulsi N, Huang Y, Cheng D, Carson RE, Sherwin R, Ding YS. Imaging human brown adipose tissue under room temperature conditions with 11C-MRB, a selective norepinephrine transporter PET ligand. Metabolism 2015, 64: 747-755. PMID: 25798999, PMCID: PMC4408242, DOI: 10.1016/j.metabol.2015.03.001.Peer-Reviewed Original ResearchConceptsBrown adipose tissueDistribution volume ratioSympathetic nervous systemAdipose tissueRole of BATCold stimulationFDG PET-CT imagingNorepinephrine transporterSupraclavicular brown adipose tissueHuman brown adipose tissueTotal body fatLean body massCold-stimulated conditionsBody temperaturePET-CT imagingBioelectrical impedance analysisCore body temperatureFDG uptakePET-CTOccipital cortexBody fatNervous systemBody compositionPET ligandBasal state
2013
Decreased norepinephrine transporter availability in obesity: Positron Emission Tomography imaging with (S,S)-[11C]O-methylreboxetine
Li CS, Potenza MN, Lee DE, Planeta B, Gallezot JD, Labaree D, Henry S, Nabulsi N, Sinha R, Ding YS, Carson RE, Neumeister A. Decreased norepinephrine transporter availability in obesity: Positron Emission Tomography imaging with (S,S)-[11C]O-methylreboxetine. NeuroImage 2013, 86: 306-310. PMID: 24121204, PMCID: PMC3947246, DOI: 10.1016/j.neuroimage.2013.10.004.Peer-Reviewed Original ResearchConceptsBody mass indexMultilinear reference tissue model 2Norepinephrine transporterNoradrenergic dysfunctionObese individualsLean individualsStructural MR scansBPND valuesNorepinephrine transporter availabilityReference tissue model 2Positron emission tomography (PET) imagingEmission Tomography ImagingPositron emission tomographyBrain norepinephrine transportersNE clearanceMass indexRaphe nucleusLocus coeruleusSynaptic availabilityObese peopleTransporter availabilityOccipital cortexComparison subjectsHealthy individualsObesity
2010
Evaluation of [11C]MRB for assessment of occupancy of norepinephrine transporters: Studies with atomoxetine in non-human primates
Gallezot JD, Weinzimmer D, Nabulsi N, Lin SF, Fowles K, Sandiego C, McCarthy TJ, Maguire RP, Carson RE, Ding YS. Evaluation of [11C]MRB for assessment of occupancy of norepinephrine transporters: Studies with atomoxetine in non-human primates. NeuroImage 2010, 56: 268-279. PMID: 20869448, PMCID: PMC3710586, DOI: 10.1016/j.neuroimage.2010.09.040.Peer-Reviewed Original ResearchConceptsAttention deficit hyperactivity disorderPositron emission tomographyNorepinephrine transporterDrug occupancy studiesRhesus monkeysReference regionTreatment of depressionDose-dependent reductionVolume of distributionArterial blood samplingSuitable reference regionOccupancy studiesNon-human primatesBrain norepinephrine transportersPromising radioligandPlasma levelsTherapeutic doseOccipital cortexBlood samplingUptake inhibitorAtomoxetineEmission tomographyEffective dosePET studiesArterial input functionClinically Relevant Doses of Methylphenidate Significantly Occupy Norepinephrine Transporters in Humans In Vivo
Hannestad J, Gallezot JD, Planeta-Wilson B, Lin SF, Williams WA, van Dyck CH, Malison RT, Carson RE, Ding YS. Clinically Relevant Doses of Methylphenidate Significantly Occupy Norepinephrine Transporters in Humans In Vivo. Biological Psychiatry 2010, 68: 854-860. PMID: 20691429, PMCID: PMC3742016, DOI: 10.1016/j.biopsych.2010.06.017.Peer-Reviewed Original ResearchConceptsAttention-deficit/hyperactivity disorderNET-rich regionsPositron emission tomographyNorepinephrine transporterDopamine transporterHyperactivity disorderRelevant dosesEmission tomographySingle-blind placeboMultilinear reference tissue modelEffective dose 50Attention deficit hyperactivity disorderDose-dependent mannerMechanism of actionDeficit hyperactivity disorderBrain norepinephrine transportersReference tissue modelMaintenance doseOral methylphenidateHealthy subjectsTherapeutic effectOccipital cortexCommon treatmentPsychiatric disordersMethylphenidate
2005
In vivo imaging of human cerebral nicotinic acetylcholine receptors with 2-18F-fluoro-A-85380 and PET.
Gallezot JD, Bottlaender M, Grégoire MC, Roumenov D, Deverre JR, Coulon C, Ottaviani M, Dollé F, Syrota A, Valette H. In vivo imaging of human cerebral nicotinic acetylcholine receptors with 2-18F-fluoro-A-85380 and PET. Journal Of Nuclear Medicine 2005, 46: 240-7. PMID: 15695782.Peer-Reviewed Original ResearchConceptsNicotinic acetylcholine receptorsLogan graphical analysisPET scansTime-activity curvesAcetylcholine receptorsStudy durationCerebral nicotinic acetylcholine receptorsDistribution of nAChRsVolume of distributionDynamic PET scansHuman brainIntravenous injectionFrontal cortexOccipital cortexHuman volunteersPET radioligandCompartment modelCompartmental kinetic analysisLogan analysisVolume of interest