2024
Validation of a Simplified Tissue-to-Reference Ratio Measurement Using SUVR to Assess Synaptic Density Alterations in Alzheimer Disease with [11C]UCB-J PET
Young J, O’Dell R, Naganawa M, Toyonaga T, Chen M, Nabulsi N, Huang Y, Cooper E, Miller A, Lam J, Bates K, Ruan A, Nelsen K, Salardini E, Carson R, van Dyck C, Mecca A. Validation of a Simplified Tissue-to-Reference Ratio Measurement Using SUVR to Assess Synaptic Density Alterations in Alzheimer Disease with [11C]UCB-J PET. Journal Of Nuclear Medicine 2024, 65: jnumed.124.267419. PMID: 39299782, PMCID: PMC11533916, DOI: 10.2967/jnumed.124.267419.Peer-Reviewed Original ResearchDistribution volume ratioSUV ratioSynaptic densityEffect sizeAlzheimer's diseaseLongitudinal study of Alzheimer's diseaseMethods:</b> ParticipantsLongitudinal studyMeasure synaptic densityAD participantsStudy of Alzheimer's diseaseNormal cognitionReference regionOlder adultsMulticenterDensity alterations
2023
Preclinical evaluation of a brain penetrant PARP PET imaging probe in rat glioblastoma and nonhuman primates
Chen B, Ojha D, Toyonaga T, Tong J, Pracitto R, Thomas M, Liu M, Kapinos M, Zhang L, Zheng M, Holden D, Fowles K, Ropchan J, Nabulsi N, De Feyter H, Carson R, Huang Y, Cai Z. Preclinical evaluation of a brain penetrant PARP PET imaging probe in rat glioblastoma and nonhuman primates. European Journal Of Nuclear Medicine And Molecular Imaging 2023, 50: 2081-2099. PMID: 36849748, DOI: 10.1007/s00259-023-06162-y.Peer-Reviewed Original ResearchConceptsPositron emission tomographyHealthy nonhuman primatesVolume of distributionDistribution volume ratioBrain kineticsRat glioblastoma modelPreclinical evaluationBrain regionsGlioblastoma modelPET tracersNonhuman primatesTumor-bearing ratsEx vivo biodistributionPET imaging resultsActive clinical trialsTreatment of glioblastomaHigh specific uptakeDynamic PET scansNoninvasive quantificationBrain positron emission tomographyNondisplaceable volumeBrain penetrationLow nonspecific uptakePrognostic informationClinical trialsDecreased synaptic vesicle glycoprotein 2A binding in a rodent model of familial Alzheimer's disease detected by [18F]SDM-16
Zheng C, Toyonaga T, Chen B, Nicholson L, Mennie W, Liu M, Spurrier J, Deluca K, Strittmatter S, Carson R, Huang Y, Cai Z. Decreased synaptic vesicle glycoprotein 2A binding in a rodent model of familial Alzheimer's disease detected by [18F]SDM-16. Frontiers In Neurology 2023, 14: 1045644. PMID: 36846134, PMCID: PMC9945093, DOI: 10.3389/fneur.2023.1045644.Peer-Reviewed Original ResearchStandardized uptake value ratioDistribution volume ratioAlzheimer's diseaseSimplified reference tissue modelSynapse lossMouse modelAPP/PS1 miceAge-matched wild-type miceAPPswe/PS1dE9 mouse modelAPP/PS1 AD mouse modelSlow brain kineticsAD mouse modelSynaptic vesicle glycoprotein 2APseudo-reference regionWild-type miceUptake value ratioMonths of ageDifferent brain regionsDifferent imaging windowsFamilial Alzheimer's diseasePET imaging studiesReference tissue modelPS1 miceBrain stemBrain kinetics
2022
Feasibility of imaging synaptic density in the human spinal cord using [11C]UCB-J PET
Rossano S, Toyonaga T, Bini J, Nabulsi N, Ropchan J, Cai Z, Huang Y, Carson RE. Feasibility of imaging synaptic density in the human spinal cord using [11C]UCB-J PET. EJNMMI Physics 2022, 9: 32. PMID: 35503134, PMCID: PMC9065222, DOI: 10.1186/s40658-022-00464-0.Peer-Reviewed Original ResearchFull spinal cordSpinal cord injuryHuman spinal cordSpinal cordAmyotrophic lateral sclerosisDistribution volume ratioCervical SCSynaptic densitySynaptic vesicle protein 2ACervical spinal cordBrain gray matterUse of PETBaseline VTWhole-body imagesSynapse lossCord injuryLateral sclerosisInjury severityGray matterNeurodegenerative disordersCordProtein 2AHuman dataDVR valuesCurrent standard
2021
Association of Aβ deposition and regional synaptic density in early Alzheimer’s disease: a PET imaging study with [11C]UCB-J
O’Dell R, Mecca AP, Chen MK, Naganawa M, Toyonaga T, Lu Y, Godek TA, Harris JE, Bartlett HH, Banks ER, Kominek VL, Zhao W, Nabulsi NB, Ropchan J, Ye Y, Vander Wyk BC, Huang Y, Arnsten AFT, Carson RE, van Dyck CH. Association of Aβ deposition and regional synaptic density in early Alzheimer’s disease: a PET imaging study with [11C]UCB-J. Alzheimer's Research & Therapy 2021, 13: 11. PMID: 33402201, PMCID: PMC7786921, DOI: 10.1186/s13195-020-00742-y.Peer-Reviewed Original ResearchConceptsRegional Aβ depositionAβ depositionEarly Alzheimer's diseaseSynaptic lossSynaptic densityAlzheimer's diseaseDistribution volume ratioPositron emission tomographyHippocampal synaptic densityMild AD dementiaDeposition of AβSignificant inverse associationAmnestic mild cognitive impairmentWhole-brain analysisMild cognitive impairmentCerebellar reference regionPET imaging studiesPlaque burdenAD dementiaInverse associationPostmortem studiesClinical severityNeurodegenerative processesClinical diseaseLarge cohort
2020
In vivo measurement of widespread synaptic loss in Alzheimer's disease with SV2A PET
Mecca AP, Chen M, O'Dell RS, Naganawa M, Toyonaga T, Godek TA, Harris JE, Bartlett HH, Zhao W, Nabulsi NB, Vander Wyk B, Varma P, Arnsten AFT, Huang Y, Carson RE, van Dyck C. In vivo measurement of widespread synaptic loss in Alzheimer's disease with SV2A PET. Alzheimer's & Dementia 2020, 16: 974-982. PMID: 32400950, PMCID: PMC7383876, DOI: 10.1002/alz.12097.Peer-Reviewed Original ResearchConceptsWidespread synaptic lossEarly Alzheimer's diseaseSynaptic lossAlzheimer's diseaseSynaptic vesicle glycoprotein 2AGray matter volumeMajor structural correlatePositron emission tomography (PET) imagingEmission Tomography ImagingDistribution volume ratioCerebellar reference regionNeocortical brain regionsSynaptic densityAD progressionConsistent pathologyPotential therapyMatter volumePromising biomarkerCognitive impairmentCN participantsBrain regionsDiseaseTomography imagingNormal participantsStructural correlates
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 properties
2017
Metabotropic Glutamate Receptor 5 and Glutamate Involvement in Major Depressive Disorder: A Multimodal Imaging Study
Abdallah CG, Hannestad J, Mason GF, Holmes SE, DellaGioia N, Sanacora G, Jiang L, Matuskey D, Satodiya R, Gasparini F, Lin X, Javitch J, Planeta B, Nabulsi N, Carson RE, Esterlis I. Metabotropic Glutamate Receptor 5 and Glutamate Involvement in Major Depressive Disorder: A Multimodal Imaging Study. Biological Psychiatry Cognitive Neuroscience And Neuroimaging 2017, 2: 449-456. PMID: 28993818, PMCID: PMC5630181, DOI: 10.1016/j.bpsc.2017.03.019.Peer-Reviewed Original ResearchMajor depressive disorderMetabotropic glutamate receptor 5Positron emission tomographyGlutamate receptor 5Healthy controlsGlx levelsMGluR5 availabilityDepressive disorderReceptor 5Glx/Cr levelsAnterior cingulate glutamateGlutamate/CrRole of mGluR5Proton magnetic resonance spectroscopyDistribution volume ratioMultimodal Imaging StudyACC glutamateGlutamatergic systemGlutamate involvementGlutamate levelsPostmortem studiesEmission tomographyImaging studiesMGluR5Cr levels
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