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000904374 0247_ $$2ISSN$$a1619-7089
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000904374 1001_ $$0P:(DE-HGF)0$$aSeemiller, Joseph$$b0$$eCorresponding author
000904374 245__ $$aIndication of retrograde tau spreading along Braak stages and functional connectivity pathways
000904374 260__ $$aHeidelberg [u.a.]$$bSpringer-Verl.$$c2021
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000904374 520__ $$aPurpose: Tau pathology progression in Alzheimer's disease (AD) is explained through the network degeneration hypothesis and the neuropathological Braak stages; however, the compatibility of these models remains unclear.Methods: We utilized [18F]AV-1451 tau-PET scans of 39 subjects with AD and 39 sex-matched amyloid-negative healthy controls (HC) in the ADNI (Alzheimer's Disease Neuroimaging Initiative) dataset. The peak cluster of tau-tracer uptake was identified in each Braak stage of neuropathological tau deposition and used to create a seed-based functional connectivity network (FCN) using 198 HC subjects, to identify healthy networks unaffected by neurodegeneration.Results: Voxel-wise tau deposition was both significantly higher inside relative to outside FCNs and correlated significantly and positively with levels of healthy functional connectivity. Within many isolated Braak stages and regions, the correlation between tau and intrinsic functional connectivity was significantly stronger than it was across the whole brain. In this way, each peak cluster of tau was related to multiple Braak stages traditionally associated with both earlier and later stages of disease.Conclusion: We show specificity of healthy FCN topography for AD-pathological tau as well as positive voxel-by-voxel correlations between pathological tau and healthy functional connectivity. We propose a model of "up- and downstream" functional tau progression, suggesting that tau pathology evolves along functional connectivity networks not only "downstream" (i.e., along the expected sequence of the established Braak stages) but also in part "upstream" or "retrograde" (i.e., against the expected sequence of the established Braak stages), with pathology in earlier Braak stages intensified by its functional relationship to later disease stages.Keywords: Alzheimer’s disease; Braak stage; Functional connectivity; Network degeneration hypothesis; PET; Tau.
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000904374 7001_ $$0P:(DE-Juel1)166265$$aBischof, Gerard Nisal$$b1
000904374 7001_ $$0P:(DE-Juel1)178642$$aHönig, Merle$$b2
000904374 7001_ $$0P:(DE-HGF)0$$aTahmasian, Masoud$$b3
000904374 7001_ $$0P:(DE-HGF)0$$avan Eimeren, Thilo$$b4
000904374 7001_ $$0P:(DE-Juel1)177611$$aDrzezga, Alexander$$b5
000904374 7001_ $$0P:(DE-HGF)0$$aInitiative, the Alzheimer’s Disease Neuroimaging$$b6
000904374 773__ $$0PERI:(DE-600)2098375-X$$a10.1007/s00259-020-05183-1$$gVol. 48, no. 7, p. 2272 - 2282$$n7$$p2272 - 2282$$tEuropean journal of nuclear medicine and molecular imaging$$v48$$x0340-6997$$y2021
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000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a Department of Neurology, Geisinger Medical Center, 100 N. Academy Ave, Danville, PA, 17822, USA. joe@josephseemiller.com$$b0
000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-Juel1)166265$$a Multimodal Neuroimaging Group, Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany$$b1
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000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-Juel1)178642$$a Multimodal Neuroimaging Group, Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany$$b2
000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a  Institute of Medical Science and Technology, Shahid Beheshti University, Tehran, Iran$$b3
000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany$$b4
000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a German Center for Neurodegenerative Diseases (DZNE), Bonn/Cologne, Germany$$b4
000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a Multimodal Neuroimaging Group, Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany$$b4
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000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-Juel1)177611$$a Multimodal Neuroimaging Group, Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany$$b5
000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-Juel1)177611$$a German Center for Neurodegenerative Diseases (DZNE), Bonn/Cologne, Germany$$b5
000904374 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a the Alzheimer’s Disease Neuroimaging Initiative$$b6
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