Multi-parametric [18F]PI-2620 tau PET/MRI for the phenotyping of different Alzheimer's disease variants.
Purpose: Heterogeneity in clinical phenotypes has led to the description of different phenotypes of Alzheimer's disease (AD). Besides the most frequent amnestic variant of AD (aAD), patients presenting with language deficits are diagnosed with logopenic variant primary progressive aphasia (lvPPA), w...
| Publicado en: | European Journal of Nuclear Medicine & Molecular Imaging Vol. 52; no. 7; pp. 2279 - 2290 |
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| Autores principales: | , , , , , , , , , , , , , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Jun2025
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=185470968&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 185470968 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 16197070 NPC jtl: European Journal of Nuclear Medicine & Molecular Imaging issn: 16197070 maglogo: N pubinfo: dt: Jun2025 vid: 52 iid: 7 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 185470968 182972315 10.1007/s00259-025-07135-z 185470968 ppf: 2279 ppct: 11 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Multi-parametric [18F]PI-2620 tau PET/MRI for the phenotyping of different Alzheimer's disease variants. aug: au: Rullmann, Michael Henssen, Dylan Melasch, Juliana T. Scherlach, Cordula Saur, Dorothee Schroeter, Matthias L. Tiepolt, Solveig Koglin, Norman Stephens, Andrew W. Hesse, Swen Strauss, Maria Brendel, Matthias Mishchenko, Olena Schildan, Andreas Classen, Joseph Hoffmann, Karl-Titus Sabri, Osama Barthel, Henryk affil: https://ror.org/03s7gtk40 Department of Nuclear Medicine, University of Leipzig Medical Center Leipzig, Leipzig, Germany sug: ab: Purpose: Heterogeneity in clinical phenotypes has led to the description of different phenotypes of Alzheimer's disease (AD). Besides the most frequent amnestic variant of AD (aAD), patients presenting with language deficits are diagnosed with logopenic variant primary progressive aphasia (lvPPA), whereas patients presenting with visual deficits are classified as posterior cortical atrophy (PCA). Methods: This study set out to investigate the value of a multi-parametric [18F]PI-2620 tau PET/MRI protocol to distinguish aAD, lvPPA and PCA to support clinical diagnosis in 32 patients. Phenotype-specific information about tau accumulation, relative perfusion, grey matter density, functional network alterations and white matter microstructural alterations was collected. Results: The aAD patients showed significantly higher tau accumulation, relative hypoperfusion and grey matter density loss in the temporal lobes compared to PCA and lvPPA patients. PCA patients, on the other hand, showed significantly higher tau accumulation in the occipital lobe as compared to aAD patients. Relative hypoperfusion in the occipital lobe and loss of functional connectivity of the posterior cingulate cortex to supplementary visual cortical regions helped to distinguish PCA from lvPPA. Tau accumulation in the cerebellum and microstructural changes in the cingulum were found to help differentiate lvPPA from aAD. Conclusion: This study highlights structural and functional differences between patients with different AD phenotypes. Differences in regional tau PET signals suggest that refinements in the Braak staging system are needed for the non-aAD cases. These patterns of tau accumulation align with the cascading network failure hypothesis, though more research is needed to warrant the here presented results in larger patient cohorts. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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