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http://hdl.handle.net/10773/37405
Title: | Multimodal MRI analysis of basal forebrain structure and function across the Alzheimer's disease spectrum |
Author: | Herdick, Meret Dyrba, Martin Fritz, Hans-Christian J. Altenstein, Slawek Ballarini, Tommaso Brosseron, Frederic Buerger, Katharina Can Cetindag, Arda Dechent, Peter Dobisch, Laura Duezel, Emrah Ertl-Wagner, Birgit Fliessbach, Klaus Dawn Freiesleben, Silka Frommann, Ingo Glanz, Wenzel Dylan Haynes, John Heneka, Michael T. Janowitz, Daniel Kilimann, Ingo Laske, Christoph Metzger, Coraline D. Munk, Matthias H. Peters, Oliver Priller, Josef Roy, Nina Scheffler, Klaus Schneider, Anja Spottke, Annika Jakob Spruth, Eike Tscheuschler, Maike Vukovich, Ruth Wiltfang, Jens Jessen, Frank Teipel, Stefan Grothe, Michel J. |
Keywords: | Cholinergic basal forebrain Subjective cognitive decline Alzheimer’s disease Functional connectivity Mean diffusivity Resting-state fMRI |
Issue Date: | 2020 |
Publisher: | Elsevier |
Abstract: | Background: Dysfunction of the cholinergic basal forebrain (cBF) is associated with cognitive decline in Alz- heimer’s disease (AD). Multimodal MRI allows for the investigation of cBF changes in-vivo. In this study we assessed alterations in cBF functional connectivity (FC), mean diffusivity (MD), and volume across the spectrum of AD. We further assessed effects of amyloid pathology on these changes. Methods: Participants included healthy controls, and subjects with subjective cognitive decline (SCD), mild cognitive impairment (MCI), or AD dementia (ADD) from the multicenter DELCODE study. Resting-state func- tional MRI (rs-fMRI) and structural MRI data was available for 477 subjects, and a subset of 243 subjects also had DTI data available. Differences between diagnostic groups were investigated using seed-based FC, volumetric, and MD analyses of functionally defined anterior (a-cBF) and posterior (p-cBF) subdivisions of a cytoarchitec- tonic cBF region-of-interest. In complementary analyses groups were stratified according to amyloid status based on CSF Aβ42/40 biomarker data, which was available in a subset of participants. Results: a-cBF and p-cBF subdivisions showed regional FC profiles that were highly consistent with previously reported patterns, but there were only minimal differences between diagnostic groups. Compared to controls, cBF volumes and MD were significantly different in MCI and ADD but not in SCD. The Aβ42/40 stratified an- alyses largely matched these results. Conclusions: We reproduced subregion-specific FC profiles of the cBF in a clinical sample spanning the AD spectrum. At least in this multicentric cohort study, cBF-FC did not show marked changes along the AD spectrum, and multimodal MRI did not provide more sensitive measures of AD-related cBF changes compared to volumetry. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/37405 |
DOI: | 10.1016/j.nicl.2020.102495 |
Appears in Collections: | IBIMED - Artigos DCM - Artigos |
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Multimodal MRI analysis of basal forebrain structure and function across the.pdf | 4.7 MB | Adobe PDF | View/Open |
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