2022
Age, gender and body-mass-index relationships with in vivo CB1 receptor availability in healthy humans measured with [11C]OMAR PET
Radhakrishnan R, Worhunsky PD, Zheng MQ, Najafzadeh S, Gallezot JD, Planeta B, Henry S, Nabulsi N, Ranganathan M, Skosnik PD, Pittman B, Cyril D'Souza D, Carson RE, Huang Y, Potenza MN, Matuskey D. Age, gender and body-mass-index relationships with in vivo CB1 receptor availability in healthy humans measured with [11C]OMAR PET. NeuroImage 2022, 264: 119674. PMID: 36243269, DOI: 10.1016/j.neuroimage.2022.119674.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultBody Mass IndexBrainFemaleHumansMaleMiddle AgedPositron-Emission TomographyRadiopharmaceuticalsReceptor, Cannabinoid, CB1Young Adult
2021
PET Imaging Estimates of Regional Acetylcholine Concentration Variation in Living Human Brain
Smart K, Naganawa M, Baldassarri SR, Nabulsi N, Ropchan J, Najafzadeh S, Gao H, Navarro A, Barth V, Esterlis I, Cosgrove KP, Huang Y, Carson RE, Hillmer AT. PET Imaging Estimates of Regional Acetylcholine Concentration Variation in Living Human Brain. Cerebral Cortex 2021, 31: 2787-2798. PMID: 33442731, PMCID: PMC8355478, DOI: 10.1093/cercor/bhaa387.Peer-Reviewed Original ResearchConceptsACh concentrationHuman volunteersHigh ACh concentrationsMuscarinic antagonist scopolamineHealthy human volunteersHuman brainCholinergic receptorsNicotine challengeAntagonist scopolaminePreclinical studiesStriatal regionsPET scansEndogenous neurotransmittersNeuropsychiatric diseasesNonhuman primatesWhole-brain imagesDrug occupancyNicotinic ligandsClinical populationsBrainAcetylcholineDistinct functional rolesStriatumVolunteersFunctional roleAssessment of test-retest reproducibility of [18F]SynVesT-1, a novel radiotracer for PET imaging of synaptic vesicle glycoprotein 2A
Li S, Naganawa M, Pracitto R, Najafzadeh S, Holden D, Henry S, Matuskey D, Emery PR, Cai Z, Ropchan J, Nabulsi N, Carson RE, Huang Y. Assessment of test-retest reproducibility of [18F]SynVesT-1, a novel radiotracer for PET imaging of synaptic vesicle glycoprotein 2A. European Journal Of Nuclear Medicine And Molecular Imaging 2021, 48: 1327-1338. PMID: 33416954, DOI: 10.1007/s00259-020-05149-3.Peer-Reviewed Original ResearchConceptsTest-retest reproducibilityTime-activity curvesBPND valuesNonhuman primatesAbsolute test-retest variabilitySynaptic vesicle glycoprotein 2AHigh brain uptakeNon-displaceable binding potentialExcellent test-retest reproducibilityGray matter areasHealthy human subjectsHigh uptakeTest-retest variabilityDynamic PET scanningTest-retest reliabilityBrain uptakeDistribution volume valuesCentrum semiovaleUrinary bladderOne-tissue compartment modelMaximum SUVPET scanningPET scansTracer uptakeBrain disorders
2020
Inverse changes in raphe and cortical 5‐HT1B receptor availability after acute tryptophan depletion in healthy human subjects
Baldassarri SR, Park E, Finnema SJ, Planeta B, Nabulsi N, Najafzadeh S, Ropchan J, Huang Y, Hannestad J, Maloney K, Bhagwagar Z, Carson RE. Inverse changes in raphe and cortical 5‐HT1B receptor availability after acute tryptophan depletion in healthy human subjects. Synapse 2020, 74: e22159. PMID: 32324935, PMCID: PMC7426238, DOI: 10.1002/syn.22159.Peer-Reviewed Original Research
2019
First in-human PET study and kinetic evaluation of [18F]AS2471907 for imaging 11β-hydroxysteroid dehydrogenase type 1
Bhatt S, Nabulsi NB, Li S, Cai Z, Matuskey D, Bini J, Najafzadeh S, Kapinos M, Ropchan JR, Carson RE, Cosgrove KP, Huang Y, Hillmer AT. First in-human PET study and kinetic evaluation of [18F]AS2471907 for imaging 11β-hydroxysteroid dehydrogenase type 1. Cerebrovascular And Brain Metabolism Reviews 2019, 40: 695-704. PMID: 30895878, PMCID: PMC7168798, DOI: 10.1177/0271678x19838633.Peer-Reviewed Original ResearchEvaluation of 11C-LSN3172176 as a Novel PET Tracer for Imaging M1 Muscarinic Acetylcholine Receptors in Nonhuman Primates
Nabulsi NB, Holden D, Zheng MQ, Bois F, Lin SF, Najafzadeh S, Gao H, Ropchan J, Lara-Jaime T, Labaree D, Shirali A, Slieker L, Jesudason C, Barth V, Navarro A, Kant N, Carson RE, Huang Y. Evaluation of 11C-LSN3172176 as a Novel PET Tracer for Imaging M1 Muscarinic Acetylcholine Receptors in Nonhuman Primates. Journal Of Nuclear Medicine 2019, 60: 1147-1153. PMID: 30733324, DOI: 10.2967/jnumed.118.222034.Peer-Reviewed Original ResearchConceptsMuscarinic acetylcholine receptorsAcetylcholine receptorsNonhuman primatesM1 muscarinic acetylcholine receptorBrain time-activity curvesRich brain regionsArterial blood samplingNovel PET tracersSuitable reference regionRegional distribution volumesReference regionDevelopment of drugsBrain uptakeGlobus pallidusDistribution volume valuesNucleus accumbensBlood samplingPET scansTime-activity curvesCognitive impairmentAlzheimer's diseaseBrain regionsDistribution volumeSelective radiotracerRhesus monkeys
2016
Preclinical Evaluation of 18F-PF-05270430, a Novel PET Radioligand for the Phosphodiesterase 2A Enzyme
Chen L, Nabulsi N, Naganawa M, Zasadny K, Skaddan MB, Zhang L, Najafzadeh S, Lin SF, Helal CJ, Boyden TL, Chang C, Ropchan J, Carson RE, Villalobos A, Huang Y. Preclinical Evaluation of 18F-PF-05270430, a Novel PET Radioligand for the Phosphodiesterase 2A Enzyme. Journal Of Nuclear Medicine 2016, 57: 1448-1453. PMID: 27199356, PMCID: PMC5093921, DOI: 10.2967/jnumed.115.171454.Peer-Reviewed Original ResearchAnimalsAzabicyclo CompoundsAzetidinesBrainCyclic Nucleotide Phosphodiesterases, Type 2Macaca mulattaMaleMetabolic Clearance RateMolecular ImagingOrgan SpecificityPositron-Emission TomographyRadiopharmaceuticalsRatsRats, Sprague-DawleyReproducibility of ResultsSensitivity and SpecificitySpecies SpecificityTissue Distribution
2015
Test–Retest Reproducibility of Binding Parameters in Humans with 11C-LY2795050, an Antagonist PET Radiotracer for the κ Opioid Receptor
Naganawa M, Zheng MQ, Henry S, Nabulsi N, Lin SF, Ropchan J, Labaree D, Najafzadeh S, Kapinos M, Tauscher J, Neumeister A, Carson RE, Huang Y. Test–Retest Reproducibility of Binding Parameters in Humans with 11C-LY2795050, an Antagonist PET Radiotracer for the κ Opioid Receptor. Journal Of Nuclear Medicine 2015, 56: 243-248. PMID: 25593119, PMCID: PMC4322754, DOI: 10.2967/jnumed.114.147975.Peer-Reviewed Original ResearchConceptsTest-retest variabilityOpioid receptorsOutcome measuresAbsolute test-retest variabilityMultilinear analysis 1Healthy human subjectsSuitable reference regionTest-retest reproducibilityIntraclass correlation coefficientAntagonist radiotracersHealthy subjectsLY2795050PET scansBrain regionsDistribution volumePET radioligandTest-retest performancePET studiesArterial input functionPET radiotracersHuman subjectsReference regionReceptorsVT valuesKOR
2014
Further evaluation of [11C]MP‐10 as a radiotracer for phosphodiesterase 10A: PET imaging study in rhesus monkeys and brain tissue metabolite analysis
Lin S, Labaree D, Chen M, Holden D, Gallezot J, Kapinos M, Teng J, Najafzadeh S, Plisson C, Rabiner EA, Gunn RN, Carson RE, Huang Y. Further evaluation of [11C]MP‐10 as a radiotracer for phosphodiesterase 10A: PET imaging study in rhesus monkeys and brain tissue metabolite analysis. Synapse 2014, 69: 86-95. PMID: 25450608, PMCID: PMC4275380, DOI: 10.1002/syn.21792.Peer-Reviewed Original ResearchConceptsRhesus monkeysPhosphodiesterase 10ASprague-Dawley ratsMP-10Dose-dependent mannerSpecific PET tracersHigh specific bindingPET imaging studiesTissue uptake kineticsBaseline scanBrain regionsImaging studiesFurther evaluationMultilinear analysis methodRegional volumesPET tracersNonhuman primatesPET imagingVivo studiesReference tissueMonkeysBrainCerebellumSpecific bindingPresent study
2013
Tracer Kinetic Modeling of [11C]AFM, a New PET Imaging Agent for the Serotonin Transporter
Naganawa M, Nabulsi N, Planeta B, Gallezot JD, Lin SF, Najafzadeh S, Williams W, Ropchan J, Labaree D, Neumeister A, Huang Y, Carson RE. Tracer Kinetic Modeling of [11C]AFM, a New PET Imaging Agent for the Serotonin Transporter. Cerebrovascular And Brain Metabolism Reviews 2013, 33: 1886-1896. PMID: 23921898, PMCID: PMC3851894, DOI: 10.1038/jcbfm.2013.134.Peer-Reviewed Original ResearchConceptsPositron emission tomographySerotonin transporterReference tissue modelArterial input functionOne-tissue modelMultilinear reference tissue modelNew PET imaging agentTwo-tissue modelPET imaging agentHealthy human brainSuitable PET radioligandNew positron emission tomographySERT densityRegional time-activity curvesTime-activity curvesEmission tomography dataRegional bindingEmission tomographyPET radioligandRoutine useInterest analysisNoninvasive methodPositron emission tomography dataImaging agentHuman brainDetermination of the In Vivo Selectivity of a New κ-Opioid Receptor Antagonist PET Tracer 11C-LY2795050 in the Rhesus Monkey
Kim SJ, Zheng MQ, Nabulsi N, Labaree D, Ropchan J, Najafzadeh S, Carson RE, Huang Y, Morris ED. Determination of the In Vivo Selectivity of a New κ-Opioid Receptor Antagonist PET Tracer 11C-LY2795050 in the Rhesus Monkey. Journal Of Nuclear Medicine 2013, 54: 1668-1674. PMID: 23918735, PMCID: PMC5824998, DOI: 10.2967/jnumed.112.118877.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBenzamidesBrainComputer SimulationImage Interpretation, Computer-AssistedMacaca mulattaMetabolic Clearance RateModels, BiologicalPositron-Emission TomographyPyrrolidinesRadiopharmaceuticalsReceptors, Opioid, kappaReproducibility of ResultsSensitivity and SpecificityTissue Distribution