2021
Dopamine D2/3 receptor availability in cocaine use disorder individuals with obesity as measured by [11C]PHNO PET
Matuskey D, Angarita GA, Worhunsky P, Koohsari S, Gravel P, Pittman B, Gaiser EC, Gallezot JD, Nabulsi N, Huang Y, Carson RE, Potenza MN, Malison RT. Dopamine D2/3 receptor availability in cocaine use disorder individuals with obesity as measured by [11C]PHNO PET. Drug And Alcohol Dependence 2021, 220: 108514. PMID: 33454626, PMCID: PMC7889720, DOI: 10.1016/j.drugalcdep.2021.108514.Peer-Reviewed Original Research
2018
Brain serotonin synthesis capacity in obsessive-compulsive disorder: effects of cognitive behavioral therapy and sertraline
Lissemore J, Sookman D, Gravel P, Berney A, Barsoum A, Diksic M, Nordahl T, Pinard G, Sibon I, Cottraux J, Leyton M, Benkelfat C. Brain serotonin synthesis capacity in obsessive-compulsive disorder: effects of cognitive behavioral therapy and sertraline. Translational Psychiatry 2018, 8: 82. PMID: 29666372, PMCID: PMC5904107, DOI: 10.1038/s41398-018-0128-4.Peer-Reviewed Original ResearchConceptsSerotonin synthesis capacitySelective serotonin reuptake inhibitorsCognitive behavioral therapyObsessive-compulsive disorderPartial respondersTreatment modalitiesMedication-free OCD patientsBehavioral therapyOCD patientsSerotonin reuptake inhibitorsWeeks of treatmentRegional tracer uptakePost-treatment changesPositron emission tomographySynthesis capacityClinical improvementSSRI treatmentReuptake inhibitorsSertraline treatmentSymptom improvementRaphe nucleusNeurochemical changesSerotonergic toneSymptom responseEffective treatment
2017
Quantification of brain cholinergic denervation in Alzheimer’s disease using PET imaging with [18F]-FEOBV
Aghourian M, Legault-Denis C, Soucy J, Rosa-Neto P, Gauthier S, Kostikov A, Gravel P, Bédard M. Quantification of brain cholinergic denervation in Alzheimer’s disease using PET imaging with [18F]-FEOBV. Molecular Psychiatry 2017, 22: 1531-1538. PMID: 28894304, DOI: 10.1038/mp.2017.183.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overAlzheimer DiseaseAmyloid beta-PeptidesBrainCase-Control StudiesCholinergic AgentsCholinergic NeuronsFemaleFluorodeoxyglucose F18HumansMaleMiddle AgedPiperidinesPositron-Emission TomographyPresynaptic TerminalsRadioactive TracersVesicular Acetylcholine Transport ProteinsConceptsMini-Mental State ExaminationStandardized uptake value ratioAlzheimer's diseaseCortical areasPresynaptic cholinergic nerve terminalsAmyloid-beta tracerNumerous cortical areasCognitive scalesCholinergic nerve terminalsUptake value ratioVesicular acetylcholine transporterMultiple cortical areasNew PET radiotracersVoxel-wise t-testsCholinergic denervationCholinergic terminalsCholinergic degenerationControl subjectsAD patientsCholinergic lossNerve terminalsAD groupHealthy subjectsAcetylcholine transporterAD subjects
2016
Cocaine cue–induced dopamine release in the human prefrontal cortex
Milella M, Fotros A, Gravel P, Casey K, Larcher K, Verhaeghe J, Cox S, Reader A, Dagher A, Benkelfat C, Leyton M. Cocaine cue–induced dopamine release in the human prefrontal cortex. Journal Of Psychiatry And Neuroscience 2016, 41: 322-330. PMID: 26900792, PMCID: PMC5008921, DOI: 10.1503/jpn.150207.Peer-Reviewed Original ResearchMeSH KeywordsAdultBenzamidesBrain MappingCocaineCocaine-Related DisordersCorpus StriatumCravingCuesDopamineDopamine D2 Receptor AntagonistsDopamine Uptake InhibitorsFemaleFluorine RadioisotopesHumansMagnetic Resonance ImagingMaleMiddle AgedNeuropsychological TestsPositron-Emission TomographyPrefrontal CortexRadiopharmaceuticalsConceptsDA releaseMedial orbitofrontal cortexPrefrontal cortexDrug-related cuesDopamine releaseHuman prefrontal cortexOrbitofrontal cortexCortical DA releasePresence of autoreceptorsDA cell bodiesD2 receptor levelsD2/3 receptor availabilityCurrent cocaine dependencePositron emission tomographyCocaine use disorderDorsolateral prefrontal cortexSelf-reported cravingStriatal changesHigh-resolution positron emission tomographyReceptor levelsSeparate regulatory mechanismsStriatal regionsDA responseUse disordersReceptor availability
2011
Tryptophan hydroxylase2 gene polymorphisms predict brain serotonin synthesis in the orbitofrontal cortex in humans
Booij L, Turecki G, Leyton M, Gravel P, Lopez De Lara C, Diksic M, Benkelfat C. Tryptophan hydroxylase2 gene polymorphisms predict brain serotonin synthesis in the orbitofrontal cortex in humans. Molecular Psychiatry 2011, 17: 809-817. PMID: 21747395, DOI: 10.1038/mp.2011.79.Peer-Reviewed Original ResearchConceptsPositron emission tomographySerotonin synthesisTryptophan hydroxylase 2Orbitofrontal cortexRate-limiting enzymeSingle nucleotide polymorphismsL-tryptophan trappingRegional serotonin synthesisBrain serotonin synthesisTPH2 single nucleotide polymorphismsDose-effect relationshipBrain clearanceHealthy controlsGene polymorphismsAggressive behavioral phenotypeEmission tomographyHydroxylase 2TPH2 geneGenetic factorsCortexBehavioral phenotypesPolymorphismPatientsHumansLarge sampleBrain Regionalα-[11C]Methyl-L-Tryptophan Trapping in Medication-Free Patients With Obsessive-Compulsive Disorder
Berney A, Leyton M, Gravel P, Sibon I, Sookman D, Neto P, Diksic M, Nakai A, Pinard G, Todorov C, Okazawa H, Blier P, Nordahl T, Benkelfat C. Brain Regionalα-[11C]Methyl-L-Tryptophan Trapping in Medication-Free Patients With Obsessive-Compulsive Disorder. JAMA Psychiatry 2011, 68: 732-741. PMID: 21383250, PMCID: PMC3677917, DOI: 10.1001/archgenpsychiatry.2011.16.Peer-Reviewed Original ResearchConceptsL-tryptophan trappingObsessive-compulsive disorderMedication-free patientsHealthy controlsMcGill University Health CentreGlucose metabolic disturbancesAdults meeting criteriaMain outcome measuresUniversity Health CentrePositron emission tomographyDepartment of PsychiatryStatistical parametric mappingTemporal lobe activityMontreal Neurological InstituteSerotonergic componentReuptake inhibitorsSerotonin dysfunctionClinical efficacySerotonergic abnormalitiesMetabolic disturbancesPostsynaptic changesSymptomatic stateSerotonergic systemHealth centersOutcome measures
2010
Where in-vivo imaging meets cytoarchitectonics: The relationship between cortical thickness and neuronal density measured with high-resolution [18F]flumazenil-PET
la Fougère C, Grant S, Kostikov A, Schirrmacher R, Gravel P, Schipper H, Reader A, Evans A, Thiel A. Where in-vivo imaging meets cytoarchitectonics: The relationship between cortical thickness and neuronal density measured with high-resolution [18F]flumazenil-PET. NeuroImage 2010, 56: 951-960. PMID: 21073964, DOI: 10.1016/j.neuroimage.2010.11.015.Peer-Reviewed Original ResearchMeSH KeywordsAgedAlgorithmsBrain MappingCerebral CortexData Interpretation, StatisticalFemaleFlumazenilGABA ModulatorsHumansImage Processing, Computer-AssistedIndividualityIsotope LabelingMagnetic Resonance ImagingMaleMiddle AgedNeuronsPositron-Emission TomographyRadiopharmaceuticalsReceptors, GABARegression AnalysisConceptsNeuronal densityCortical thicknessAxo-dendritic synapsesSensory-motor cortexHuman brain areasDifferent cytoarchitectonic areasFlumazenil PETMotor cortexApparent cortical thicknessCortical thickness mapsHealthy subjectsBrain areasMorphometry studyCytoarchitectonic areasCortical morphologyCortical regionsCortical distributionVivo studiesFMZReceptor complexPartial volume correctionCytoarchitectonicsSensitive toolDifferential relationshipsSubset
2006
Assessing whole brain perfusion changes in patients with REM sleep behavior disorder
Mazza S, Soucy J, Gravel P, Michaud M, Postuma R, Massicotte-Marquez J, Decary A, Montplaisir J. Assessing whole brain perfusion changes in patients with REM sleep behavior disorder. Neurology 2006, 67: 1618-1622. PMID: 17101893, DOI: 10.1212/01.wnl.0000242879.39415.49.Peer-Reviewed Original ResearchMeSH KeywordsAgedBrainBrain StemCerebral ArteriesCerebral CortexCerebrovascular CirculationCorpus StriatumCysteineFemaleHumansMaleMiddle AgedNeurodegenerative DiseasesOrganotechnetium CompoundsParkinson DiseasePolysomnographyPredictive Value of TestsPrognosisREM Sleep Behavior DisorderTomography, Emission-Computed, Single-PhotonConceptsREM behavior disorderBehavior disorderCerebral blood flow evaluationREM sleep behavior disorderIdiopathic REM behavior disorderSleep behavior disorderBrain perfusion changesRegional cerebral perfusionBlood flow evaluationAge-matched controlsTemporo-parietal cortexCerebral perfusionDecreased perfusionPerfusion changesPerfusional abnormalitiesRight hippocampusParkinson's diseasePatientsMetabolic profilePerfusionDisordersAbnormalitiesCortexFlow evaluationBrainstem