2024
Synaptic density patterns in early Alzheimer’s disease assessed by independent component analysis
Fang X, Raval N, O’Dell R, Naganawa M, Mecca A, Chen M, van Dyck C, Carson R. Synaptic density patterns in early Alzheimer’s disease assessed by independent component analysis. Brain Communications 2024, 6: fcae107. PMID: 38601916, PMCID: PMC11004947, DOI: 10.1093/braincomms/fcae107.Peer-Reviewed Original ResearchMedial temporal brain regionsAlzheimer's diseaseTemporal brain regionsCognitive deficitsBrain regionsCognitive impairmentPostmortem studiesBinds to SV2ASynaptic densityReduction of synaptic densityIndependent component analysisSynaptic lossAlzheimerDeficitsImpairmentBrainNeocortexComponent analysisPrimary pathologySV2A
2023
Relationships of in vivo brain norepinephrine transporter and age, BMI, and gender
Koohsari S, Sadabad F, Pittman B, Gallezot J, Carson R, van Dyck C, Li C, Potenza M, Matuskey D. Relationships of in vivo brain norepinephrine transporter and age, BMI, and gender. Synapse 2023, 77: e22279. PMID: 37382240, PMCID: PMC10416616, DOI: 10.1002/syn.22279.Peer-Reviewed Original ResearchConceptsBody mass indexMultilinear reference tissue model 2Gender-related differencesBrain norepinephrine transportersNorepinephrine transporterAge-related declineStructural MR scansBrain regionsReference tissue model 2Mass indexRaphe nucleusLocus coeruleusOccipital cortexBMI relationshipHealthy adultsHigh-resolution research tomographAvailable radiotracersHealthy participantsMR scansAgeAnatomic templateReference regionNegative associationNet availabilityPotential age
2020
The calcium‐containing smooth endoplasmic reticulum is a focus of risk factors for early‐ and late‐onset Alzheimer’s disease
Datta D, Mentone S, Morozov Y, van Dyck C, Arnsten A. The calcium‐containing smooth endoplasmic reticulum is a focus of risk factors for early‐ and late‐onset Alzheimer’s disease. Alzheimer's & Dementia 2020, 16 DOI: 10.1002/alz.047651.Peer-Reviewed Original ResearchLate-onset Alzheimer's diseaseAlzheimer's diseaseSmooth endoplasmic reticulumAD pathologyCalcium dysregulationRisk factorsCalcium leakMonkey dorsolateral prefrontal cortexAutosomal dominant Alzheimer's diseaseNeurofibrillary tangle formationGenetic risk factorsMedial temporal lobeDorsolateral prefrontal cortexMonkey DLPFCAD neurodegenerationTangle formationAge-related pathologiesTemporal lobeAnimal modelsAssociation cortexPS2 mutationTherapeutic interventionsBrain regionsEtiological eventInternal calciumIn 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
2009
123I-5-IA-85380 SPECT Imaging of Nicotinic Receptors in Alzheimer Disease and Mild Cognitive Impairment
Mitsis EM, Reech KM, Bois F, Tamagnan GD, MacAvoy MG, Seibyl JP, Staley JK, van Dyck CH. 123I-5-IA-85380 SPECT Imaging of Nicotinic Receptors in Alzheimer Disease and Mild Cognitive Impairment. Journal Of Nuclear Medicine 2009, 50: 1455-1463. PMID: 19690024, DOI: 10.2967/jnumed.109.064030.Peer-Reviewed Original ResearchConceptsAdvanced Alzheimer's diseaseMild cognitive impairmentHealthy control subjectsControl subjectsCognitive impairmentAge-matched healthy control subjectsAlzheimer's diseaseBrain regionsEffect of diagnosisNicotinic acetylcholine receptorsLate-stage phenomenonCholinergic reductionIA-85380Effect of ageUnivariate analysisNicotinic receptorsAnterior cingulateConstant infusionAcetylcholine receptorsTrail Making TestMultivariate analysisNeuropsychologic variablesDiagnostic groupsSignificant overall effectSPECT imaging
2008
Age-related decline in nicotinic receptor availability with [123I]5-IA-85380 SPECT
Mitsis EM, Cosgrove KP, Staley JK, Bois F, Frohlich EB, Tamagnan GD, Estok KM, Seibyl JP, van Dyck CH. Age-related decline in nicotinic receptor availability with [123I]5-IA-85380 SPECT. Neurobiology Of Aging 2008, 30: 1490-1497. PMID: 18242781, PMCID: PMC3523217, DOI: 10.1016/j.neurobiolaging.2007.12.008.Peer-Reviewed Original ResearchConceptsHigh-affinity nicotineEffect of ageReceptor availabilityBrain regionsNicotinic acetylcholine receptor availabilityConstant infusion paradigmHuman postmortem studiesHuman subjectsSingle photon emissionIA-85380NAChR availabilityAge-related declineInfusion paradigmPostmortem studiesPostmortem reportsAgePhoton emissionNicotinePearson correlationCognitive agingSubjectsLinear regressionNonsmokersBolusNAChRs
2000
The Alpha-2A-Adrenoceptor Agonist, Guanfacine, Increases Regional Cerebral Blood Flow in Dorsolateral Prefrontal Cortex of Monkeys Performing a Spatial Working Memory Task
Avery R, Franowicz J, Studholme C, van Dyck C, Arnsten A. The Alpha-2A-Adrenoceptor Agonist, Guanfacine, Increases Regional Cerebral Blood Flow in Dorsolateral Prefrontal Cortex of Monkeys Performing a Spatial Working Memory Task. Neuropsychopharmacology 2000, 23: 240-249. PMID: 10942848, DOI: 10.1016/s0893-133x(00)00111-1.Peer-Reviewed Original ResearchMeSH KeywordsAdrenergic alpha-2 Receptor AgonistsAdrenergic alpha-AgonistsAnimalsCerebrovascular CirculationCognitionFemaleGuanfacineImage Processing, Computer-AssistedMacaca mulattaMagnetic Resonance ImagingMemoryPrefrontal CortexSpace PerceptionStimulation, ChemicalTomography, Emission-Computed, Single-PhotonConceptsRegional cerebral blood flowCerebral blood flowPrefrontal cortexDorsolateral prefrontal cortexBlood flowAlpha 2A-adrenoceptorsAuditory association areasSuperior temporal cortexBlood flow tracerSPECT measuresAdrenoceptor agonistsAdrenoceptor stimulationAlpha-2aMemory taskAdrenoreceptor agonistIntravenous cathetersGuanfacine treatmentTemporal cortexRCBF valuesAssociation areasBrain regionsGuanfacineCortexSpatial Working Memory taskCognitive performance
1997
The acetylcholine releaser linopirdine increases parietal regional cerebral blood flow in Alzheimer’s disease
van Dyck C, Lin C, Robinson R, Cellar J, Smith E, Nelson J, Arnsten A, Hoffer P. The acetylcholine releaser linopirdine increases parietal regional cerebral blood flow in Alzheimer’s disease. Psychopharmacology 1997, 132: 217-226. PMID: 9292621, DOI: 10.1007/s002130050339.Peer-Reviewed Original ResearchConceptsRegional cerebral blood flowParietal regional cerebral blood flowCerebral blood flowAlzheimer's diseaseAD patientsBlood flowDouble-blind trialWeeks of treatmentAD drug therapyProbable Alzheimer's diseaseParietal association cortexSingle photon emissionPlacebo TIDRCBF abnormalitiesCholinergic drugsDrug therapyHealthy controlsRCBF ratiosPharmacological interventionsHealthy subjectsAssociation cortexPatientsLinopirdineBrain regionsNeuropsychological function