2024
A pilot study to evaluate the effect of CT1812 treatment on synaptic density and other biomarkers in Alzheimer’s disease
van Dyck C, Mecca A, O’Dell R, Bartlett H, Diepenbrock N, Huang Y, Hamby M, Grundman M, Catalano S, Caggiano A, Carson R. A pilot study to evaluate the effect of CT1812 treatment on synaptic density and other biomarkers in Alzheimer’s disease. Alzheimer's Research & Therapy 2024, 16: 20. PMID: 38273408, PMCID: PMC10809445, DOI: 10.1186/s13195-024-01382-2.Peer-Reviewed Original ResearchConceptsMild to moderate dementiaPositron emission tomographyAlzheimer's diseaseVolumetric MRIModerate dementiaClinical rating scalesSynaptic vesicle glycoprotein 2ACerebrospinal fluidMouse model of ADPharmacodynamic effectsPlacebo-controlled phase 1 clinical trialBiomarkers of AD pathologyClinical trialsCognitive measuresNominally significant differencesPhase 1 clinical trialModel of ADHippocampal cortexPhase 1/2 studyRating ScaleParallel-group trialSynaptic densityTrial registrationThe clinical trialPlacebo-controlledSigma-2 receptor ligands
2023
Localization of PDE4D, HCN1 channels, and mGluR3 in rhesus macaque entorhinal cortex may confer vulnerability in Alzheimer’s disease
Datta D, Perone I, Morozov Y, Arellano J, Duque A, Rakic P, van Dyck C, Arnsten A. Localization of PDE4D, HCN1 channels, and mGluR3 in rhesus macaque entorhinal cortex may confer vulnerability in Alzheimer’s disease. Cerebral Cortex 2023, 33: 11501-11516. PMID: 37874022, PMCID: PMC10724870, DOI: 10.1093/cercor/bhad382.Peer-Reviewed Original ResearchConceptsHCN1 channelsTau pathologyGlutamate synapsesEntorhinal cortexCalcium actionInternal calcium releaseEntorhinal cortex stellate cellsDorsolateral prefrontal cortexSusceptible neuronsInitial pathologySelective vulnerabilityEtiological factorsTau phosphorylationStellate cellsAlzheimer's diseaseSpecific neuronsCalcium releasePrefrontal cortexCortexSynapse strengthPathologyCalcium signalingCalbindinDiseaseNeurons
2021
Age‐related calcium dysregulation linked with tau pathology and impaired cognition in non‐human primates
Datta D, Leslie SN, Wang M, Morozov YM, Yang S, Mentone S, Zeiss C, Duque A, Rakic P, Horvath TL, van Dyck C, Nairn AC, Arnsten AFT. Age‐related calcium dysregulation linked with tau pathology and impaired cognition in non‐human primates. Alzheimer's & Dementia 2021, 17: 920-932. PMID: 33829643, PMCID: PMC8195842, DOI: 10.1002/alz.12325.Peer-Reviewed Original ResearchConceptsTau pathologyCalcium leakTau phosphorylationNeuronal firingAlzheimer's diseaseEarly tau phosphorylationPyramidal cell dendritesSporadic Alzheimer's diseasePrimary cortical neuronsPotential therapeutic targetCognitive performanceAge-related reductionMacaque dorsolateral prefrontal cortexDorsolateral prefrontal cortexNon-human primatesCalcium dysregulationCell dendritesCortical neuronsCalcium-binding proteinsAD biomarkersPathology markersTherapeutic targetAnimal modelsAged monkeysPrefrontal cortex
2017
The aged rhesus macaque manifests Braak stage III/IV Alzheimer's‐like pathology
Paspalas CD, Carlyle BC, Leslie S, Preuss TM, Crimins JL, Huttner AJ, van Dyck C, Rosene DL, Nairn AC, Arnsten AFT. The aged rhesus macaque manifests Braak stage III/IV Alzheimer's‐like pathology. Alzheimer's & Dementia 2017, 14: 680-691. PMID: 29241829, PMCID: PMC6178089, DOI: 10.1016/j.jalz.2017.11.005.Peer-Reviewed Original ResearchConceptsLate-onset Alzheimer's diseaseCortical pathologyEntorhinal cortexAnimal modelsBraak stage III/IVAlzheimer's diseaseStage III/IVRhesus macaquesProgression of tauAlzheimer-like pathologyPrimary visual cortexSequence of tauDorsolateral prefrontal cortexTau pathologyPreventive strategiesAssociation cortexVisual cortexPrefrontal cortexCortexPathologyDiseaseOld animalsProtein kinase A (PKA) phosphorylationGenetic insultsMacaques
2005
NAP: Research and Development of a Peptide Derived from Activity‐Dependent Neuroprotective Protein (ADNP)
Gozes I, Morimoto B, Tiong J, Fox A, Sutherland K, Dangoor D, Holser‐Cochav M, Vered K, Newton P, Aisen P, Matsuoka Y, van Dyck C, Thal L. NAP: Research and Development of a Peptide Derived from Activity‐Dependent Neuroprotective Protein (ADNP). CNS Neuroscience & Therapeutics 2005, 11: 353-368. PMID: 16614735, PMCID: PMC6741706, DOI: 10.1111/j.1527-3458.2005.tb00053.x.Peer-Reviewed Original ResearchConceptsActivity-dependent neuroprotective proteinIntranasal administrationClinical trialsNeuroprotective proteinPhase Ia clinical trialPhase I clinical trialApolipoprotein E deficiencyFurther clinical developmentAdverse side effectsBeta-amyloid peptideAscending dosesElectrical blockadeCardiopulmonary testSingle doseCholinergic toxicityHead injuryIntravenous formulationCognitive dysfunctionDose toxicityElderly volunteersActive doseE deficiencySide effectsAnimal modelsClinical development
2001
Comparison of [18F]altanserin and [18F]deuteroaltanserin for PET imaging of serotonin2A receptors in baboon brain: pharmacological studies
Staley J, Van Dyck C, Tan P, Al Tikriti M, Ramsby Q, Klump H, Ng C, Garg P, Soufer R, Baldwin R, Innis R. Comparison of [18F]altanserin and [18F]deuteroaltanserin for PET imaging of serotonin2A receptors in baboon brain: pharmacological studies. Nuclear Medicine And Biology 2001, 28: 271-279. PMID: 11323237, DOI: 10.1016/s0969-8051(00)00212-2.Peer-Reviewed Original ResearchConceptsReceptor antagonist SR 46349BSerotonin2A receptorsSR 46349BReceptor radiotracerPharmacological specificityTime-activity curvesConstant infusionBaboon brainCortical activityDistribution volumePharmacological studiesPET imagingRadiotracerBrainReceptorsBaboonsPET imagesRegional distributionFenfluramineInfusionBolus
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 effects of 5-HT3 receptor antagonists on cognitive performance in aged monkeys
Arnsten A, Lin C, Van Dyck C, Stanhope K. The effects of 5-HT3 receptor antagonists on cognitive performance in aged monkeys. Neurobiology Of Aging 1997, 18: 21-28. PMID: 8983029, DOI: 10.1016/s0197-4580(96)00162-5.Peer-Reviewed Original ResearchConceptsVisual object discriminationObject discriminationFine motor tasksMotor tasksCognitive-enhancing effectsMemory taskResponse taskCognitive performanceReceptor antagonistEnhanced acquisitionCognitive functionReliable improvementMarmoset researchAged monkeysTaskReversal conditionsWide dose rangeDiscriminationSide effectsLow dosesRhesus monkeysDose rangeAntagonistAcquisitionMonkeys