2023
Tau-PET abnormality as a biomarker for Alzheimer’s disease staging and early detection: a topological perspective
Ding J, Shen C, Wang Z, Yang Y, Fakhri G, Lu J, Liang D, Zheng H, Zhou Y, Sun T, Study F. Tau-PET abnormality as a biomarker for Alzheimer’s disease staging and early detection: a topological perspective. Cerebral Cortex 2023, 33: 10649-10659. PMID: 37653600, DOI: 10.1093/cercor/bhad312.Peer-Reviewed Original ResearchConceptsStandardized uptake value ratioMild cognitive impairmentBrain regionsCognitive impairmentPositron emission tomographyMedial temporal lobeAlzheimer's diseaseVisual-related regionsTopological perspectiveTau positron emission tomographyMode networkTau PET imagingTopological featuresIndependent data cohortsTemporal lobeConnection strengthExtract topological featuresTau networksAbnormal networkProgression of Alzheimer's diseaseAbnormal protein accumulation
2021
Impact of multisession 40Hz tACS on hippocampal perfusion in patients with Alzheimer’s disease
Sprugnoli G, Munsch F, Cappon D, Paciorek R, Macone J, Connor A, El Fakhri G, Salvador R, Ruffini G, Donohoe K, Shafi M, Press D, Alsop D, Pascual Leone A, Santarnecchi E. Impact of multisession 40Hz tACS on hippocampal perfusion in patients with Alzheimer’s disease. Alzheimer's Research & Therapy 2021, 13: 203. PMID: 34930421, PMCID: PMC8690894, DOI: 10.1186/s13195-021-00922-4.Peer-Reviewed Original ResearchConceptsTemporal lobeMethodsIn two open-label studiesMild to moderate AD participantsPreclinical models of ADGamma bandBrain oscillatory activityModerate AD participantsBilateral temporal lobesEpisodic memoryAdministered 1 hSpectral power changesBrain areasModulates cerebral perfusionAD participantsPlacebo-controlled trialHippocampal perfusionModel of ADOpen-label studyNeural activityAssociated with alterationsNon-invasive countermeasureCognitive AssessmentCognitive impairmentCognitive protectionOscillatory activityIn vivo and neuropathology data support locus coeruleus integrity as indicator of Alzheimer’s disease pathology and cognitive decline
Jacobs H, Becker J, Kwong K, Engels-Domínguez N, Prokopiou P, Papp K, Properzi M, Hampton O, d'Oleire Uquillas F, Sanchez J, Rentz D, El Fakhri G, Normandin M, Price J, Bennett D, Sperling R, Johnson K. In vivo and neuropathology data support locus coeruleus integrity as indicator of Alzheimer’s disease pathology and cognitive decline. Science Translational Medicine 2021, 13: eabj2511. PMID: 34550726, PMCID: PMC8641759, DOI: 10.1126/scitranslmed.abj2511.Peer-Reviewed Original ResearchConceptsLC integrityLongitudinal cognitive measuresCognitive measuresLocus coeruleusIndicators of Alzheimer's disease pathologyLocus coeruleus integrityMedial temporal lobeTangle densityRush Memory and Aging ProjectBraak stageMemory and Aging ProjectHyperphosphorylated tau aggregatesAlzheimer's diseaseB-amyloidAD-related processesMemory declineCognitive dysfunctionDisease pathologyCognitive trajectoriesTemporal lobeLC neuronsPostmortem correlationsCognitive declineEntorhinal cortexPreclinical ADThe cortical origin and initial spread of medial temporal tauopathy in Alzheimer’s disease assessed with positron emission tomography
Sanchez J, Becker J, Jacobs H, Hanseeuw B, Jiang S, Schultz A, Properzi M, Katz S, Beiser A, Satizabal C, O'Donnell A, DeCarli C, Killiany R, El Fakhri G, Normandin M, Gómez-Isla T, Quiroz Y, Rentz D, Sperling R, Seshadri S, Augustinack J, Price J, Johnson K. The cortical origin and initial spread of medial temporal tauopathy in Alzheimer’s disease assessed with positron emission tomography. Science Translational Medicine 2021, 13 PMID: 33472953, PMCID: PMC7978042, DOI: 10.1126/scitranslmed.abc0655.Peer-Reviewed Original ResearchConceptsPositron emission tomographyTemporal lobeMedial temporal lobe tauAlzheimer's diseaseMedial temporal lobeStudy of normal agingAssociated with baseline measuresMolecular positron emission tomographyTau-PET signalDegree of clinical impairmentEmission tomographyModel of Alzheimer's diseaseTemporal lobe anatomyCognitive declineClinical impairmentNormal agingAdult participantsStudy of AgingRhinal sulcusBrain pathologyExtratemporal regionsPET measurementsLongitudinal studyTau progressionClinically normal people
2020
Tracking the origin of tau spread in the brain
Jacobs H, Becker A, Kwong K, Uquillas F, Papp K, Properzi M, Rentz D, Fakhri G, Sperling R, Johnson K. Tracking the origin of tau spread in the brain. Alzheimer's & Dementia 2020, 16 DOI: 10.1002/alz.037501.Peer-Reviewed Original ResearchEntorhinal cortexMemory declineLocus coeruleusHarvard Aging Brain StudyPosterior cingulate cortexProspective memory declineAD-related cognitive declineMedial temporal lobeAging Brain StudyTau spreadingAlzheimer's diseaseCingulate cortexLimbic regionsNeuropsychological assessmentCingulate regionsTau PET imagingLC integrityCognitive changesTau accumulationMediation analysisTemporal lobeEntorhinal tauIncreased ABCognitive declineBrain studies
2017
Hierarchical Organization of Tau and Amyloid Deposits in the Cerebral Cortex
Sepulcre J, Grothe M, Sabuncu M, Chhatwal J, Schultz A, Hanseeuw B, Fakhri G, Sperling R, Johnson K. Hierarchical Organization of Tau and Amyloid Deposits in the Cerebral Cortex. JAMA Neurology 2017, 74: 813-820. PMID: 28558094, PMCID: PMC5710537, DOI: 10.1001/jamaneurol.2017.0263.Peer-Reviewed Original ResearchConceptsHeteromodal areasTemporal lobeHarvard Aging Brain StudyHeteromodal association regionsAging Brain StudyCognitively normal participantsElderly brainsPositron emission tomographicPrimary somatomotor cortexDistribution volume ratioAlzheimer's diseaseTau depositionStandardized uptake value ratioVisual regionsNormal participantsAb depositionSomatomotor cortexTemporal areaPittsburgh compound BCarbon 11-labeled Pittsburgh Compound BBrain studiesAssociation regionsHuman brainPathological hallmarks of Alzheimer's diseaseCortical distribution