Tract-specific white matter hyperintensities disrupt neural network function in Alzheimer’s disease

Alexander N. W. Taylor, Lana Kambeitz-Ilankovic, Benno Gesierich, Lee Simon-Vermot, Nicolai Franzmeier, Miguel A. Araque Caballero, Sophia Meuller, Liu Hesheng, Birgit Ertl-Wagner, Katharina Beurger, Michael Weiner, Martin Dichgans, Marco Duering, Michael Ewers

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

38 Dyfyniadau(SciVal)
170 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

Introduction
White matter hyperintensities (WMHs) increase the risk of Alzheimer's disease (AD). Whether WMHs are associated with the decline of functional neural networks in AD is debated.

Method
Resting-state functional magnetic resonance imaging and WMH were assessed in 78 subjects with increased amyloid levels on AV-45 positron emission tomography (PET) in different clinical stages of AD. We tested the association between WMH volume in major atlas-based fiber tract regions of interest (ROIs) and changes in functional connectivity (FC) between the tracts' projection areas within the default mode network (DMN).

Results
WMH volume within the inferior fronto-occipital fasciculus (IFOF) was the highest among all tract ROIs and associated with reduced FC in IFOF-connected DMN areas, independently of global AV-45 PET. Higher AV-45 PET contributed to reduced FC in IFOF-connected, temporal, and parietal DMN areas.

Conclusions
High fiber tract WMH burden is associated with reduced FC in connected areas, thus adding to the effects of amyloid pathology on neuronal network function.
Iaith wreiddiolSaesneg
Tudalennau (o-i)225-235
Nifer y tudalennau11
CyfnodolynAlzheimer's & Dementia
Cyfrol13
Rhif cyhoeddi3
Dyddiad ar-lein cynnar15 Gorff 2016
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 01 Maw 2017
Cyhoeddwyd yn allanolIe

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