2024
Loss of synaptic density in nucleus basalis of meynert indicates distinct neurodegeneration in Alzheimer’s disease: the RJNB-D study
Li B, Chen H, Zheng Y, Xu X, You Z, Huang Q, Huang Y, Guan Y, Zhao J, Liu J, Xie F, Wang J, Xu W, Zhang J, Deng Y. Loss of synaptic density in nucleus basalis of meynert indicates distinct neurodegeneration in Alzheimer’s disease: the RJNB-D study. European Journal Of Nuclear Medicine And Molecular Imaging 2024, 1-11. PMID: 39112615, DOI: 10.1007/s00259-024-06862-z.Peer-Reviewed Original ResearchWhite matter tractsCognitive impairmentSynaptic densityCognitive performancePositron emission tomographyNucleus basalisSeverity of cognitive impairmentAlzheimer's diseaseSynaptic lossNucleus basalis of MeynertBasalis of MeynertSynaptic vesicle glycoprotein 2Pathogenesis of Alzheimer's diseaseStandardized uptake value ratioCholinergic systemProfile of ADCN participantsPotential impairmentMMSE scoreMedial tractNBMImpairmentEmission tomographyLoss of synaptic densityNormal controlsPresynaptic density determined by SV2A PET is closely associated with postsynaptic metabotropic glutamate receptor 5 availability and independent of amyloid pathology in early cognitive impairment
Wang J, Huang Q, He K, Li J, Guo T, Yang Y, Lin Z, Li S, Vanderlinden G, Huang Y, Van Laere K, Guan Y, Guo Q, Ni R, Li B, Xie F. Presynaptic density determined by SV2A PET is closely associated with postsynaptic metabotropic glutamate receptor 5 availability and independent of amyloid pathology in early cognitive impairment. Alzheimer's & Dementia 2024, 20: 3876-3888. PMID: 38634334, PMCID: PMC11180932, DOI: 10.1002/alz.13817.Peer-Reviewed Original ResearchMGluR5 availabilityMedial temporal lobeSynaptic densityTemporal lobeHealthy controlsAlzheimer's diseaseMetabotropic glutamate receptor 5Glutamate receptor 5Synaptic lossIntegrative brain functionsCognitively impaired patientsEarly cognitive impairmentGlobal cognitionMGluR5 signalingMediation analysisPathophysiological mechanism of Alzheimer's diseaseBrain functionCognitive impairmentMGluR5CognitionImproving synaptic functionImpaired patientsSynaptic functionSynaptic transmissionAmyloid pathologyThe associations between synaptic density and “A/T/N” biomarkers in Alzheimer’s disease: An 18F-SynVesT-1 PET/MR study
Li J, Huang Q, Qi N, He K, Li S, Huang L, Pan F, Ren S, Hua F, Huang Y, Guan Y, Guo Q, Zhao J, Xie F. The associations between synaptic density and “A/T/N” biomarkers in Alzheimer’s disease: An 18F-SynVesT-1 PET/MR study. Cerebrovascular And Brain Metabolism Reviews 2024, 44: 1199-1207. PMID: 38295871, PMCID: PMC11179616, DOI: 10.1177/0271678x241230733.Peer-Reviewed Original ResearchSynaptic densityF-FDG PET/CTInvestigate synaptic densityFDG uptakeF-FDGCognitive impairmentClinical syndromeCI groupPlasma testingPET/MR studiesPathological changesSubgroups of individualsSynaptic density lossDensity lossBiomarkersAlzheimer's clinical syndromePatientsPET/MRHippocampusAlzheimer's diseaseHippocampal volumeParahippocampal gyrusCI+ groupDiseaseSynapse loss
2023
Assessment of Gray Matter Microstructure and Synaptic Density in Alzheimer's Disease: A Multimodal Imaging Study With DTI and SV2A PET
Silva-Rudberg J, Salardini E, O'Dell R, Chen M, Ra J, Georgelos J, Morehouse M, Melino K, Varma P, Toyonaga T, Nabulsi N, Huang Y, Carson R, van Dyck C, Mecca A. Assessment of Gray Matter Microstructure and Synaptic Density in Alzheimer's Disease: A Multimodal Imaging Study With DTI and SV2A PET. American Journal Of Geriatric Psychiatry 2023, 32: 17-28. PMID: 37673749, PMCID: PMC10840732, DOI: 10.1016/j.jagp.2023.08.002.Peer-Reviewed Original ResearchSynaptic densityAlzheimer's diseaseMean diffusivitySynaptic lossGray matter microstructureGray matter mean diffusivityDisease pathologyHippocampal synaptic densityMajor pathological correlateSetting of ADAD-related neuropathologySynaptic vesicle glycoprotein 2AHippocampal mean diffusivityAlzheimer's disease pathologyAmyloid-positive participantsMatter mean diffusivityPositron emission tomography (PET) imagingEmission Tomography ImagingGray matter structuresPathological correlatesPositive participantsInverse associationAD groupCognitive impairmentDiseasePrincipal component analysis of synaptic density measured with [11C]UCB-J PET in early Alzheimer’s disease
O'Dell R, Higgins-Chen A, Gupta D, Chen M, Naganawa M, Toyonaga T, Lu Y, Ni G, Chupak A, Zhao W, Salardini E, Nabulsi N, Huang Y, Arnsten A, Carson R, van Dyck C, Mecca A. Principal component analysis of synaptic density measured with [11C]UCB-J PET in early Alzheimer’s disease. NeuroImage Clinical 2023, 39: 103457. PMID: 37422964, PMCID: PMC10338149, DOI: 10.1016/j.nicl.2023.103457.Peer-Reviewed Original ResearchConceptsCognitive domainsCognitive performanceSubjects' scoresCortical regionsNeuropsychological batteryEarly Alzheimer's diseaseAD groupBilateral regionsNormal participantsNegative loadingsCognitive impairmentCN participantsAlzheimer's diseaseParticipantsStructural correlatesStrong contributionParticipant characteristicsScoresPositive loadingsData-driven approachTotal variancePrincipal component analysisSpecific spatial patternsIn vivo synaptic density loss correlates with impaired functional and related structural connectivity in Alzheimer’s disease
Zhang J, Wang J, Xu X, You Z, Huang Q, Huang Y, Guo Q, Guan Y, Zhao J, Liu J, Xu W, Deng Y, Xie F, Li B. In vivo synaptic density loss correlates with impaired functional and related structural connectivity in Alzheimer’s disease. Cerebrovascular And Brain Metabolism Reviews 2023, 43: 977-988. PMID: 36718002, PMCID: PMC10196742, DOI: 10.1177/0271678x231153730.Peer-Reviewed Original ResearchConceptsMiddle frontal gyrusAlzheimer's diseaseSynaptic densityMild cognitive impairmentSynapse lossCognitive impairmentCaudal middle frontal gyrusFunctional connectivityLower synaptic densityMajor pathological changesRight insular cortexStructural connectivity alterationsRight middle frontal gyrusWhite matter tractsSynaptic alterationsBilateral cortexConnectivity alterationsInsular cortexAD groupPathological changesConnectivity dysfunctionCognitive declineCognitive functionFunctional MRIDisease