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@ARTICLE{Ahmadi:1052289,
author = {Ahmadi, Reihaneh},
title = {{T}he {A}ssociation between {S}leep {D}isturbances,
{I}maging {B}iomarkers and {C}ognitive {D}ecline along the
{T}rajectory of {A}lzheimer's {D}isease},
journal = {Alzheimer's and dementia},
volume = {21},
number = {S2},
issn = {1552-5260},
address = {Hoboken, NJ},
publisher = {Wiley},
reportid = {FZJ-2026-00906},
pages = {e099181},
year = {2025},
abstract = {BackgroundAlzheimer's Disease (AD) is a prevalent and
debilitating neurodegenerative condition that significantly
impacts global health. Increasing evidence indicates that
sleep disturbances, including insomnia and Sleep-Disordered
Breathing (SDB), may act as modifiable risk factors for AD.
Despite extensive research into AD biomarkers, the complex
interactions between sleep disturbances, neuroimaging
biomarkers, and cognitive decline across the AD continuum
remain insufficiently explored. This study aimed to
investigate the relationships between self-reported sleep
disturbances, specifically insomnia and SDB, and imaging
biomarkers associated with AD.MethodData from 1510
participants in the Alzheimer's Disease Neuroimaging
Initiative (ADNI) were analyzed. Imaging biomarkers,
including tau and amyloid Positron Emission Tomography (PET)
and structural Magnetic Resonance Imaging (MRI), were
examined alongside self-reported sleep disturbances and
cognitive performance scores from the Alzheimer's Disease
Assessment Scale - Cognitive Subscale (ADAS-Cog).
Statistical analyses explored the effects of sleep
disturbances on imaging biomarkers and cognitive outcomes
while controlling for demographic and clinical
factors.ResultComparative analyses revealed that overall
sleep disturbances and their interaction with AD diagnosis
significantly impact tau deposition in key AD-sensitive
brain regions, including the amygdala, fusiform, inferior
temporal and parietal cortices, and posterior cingulate
cortex (corrected p-value < 0.05). These regions are
particularly vulnerable during the middle stages of AD.
Distinct patterns emerged for insomnia and SDB, with SDB
showing a more pronounced and earlier influence on both AD
pathology and cognitive decline compared to insomnia. The
findings suggest that SDB may be a more critical factor in
accelerating AD progression, emphasizing the need for early
intervention.ConclusionThis study demonstrates that sleep
disturbances significantly contribute to tau burden and
cognitive decline in AD, with SDB exhibiting an earlier and
more pronounced impact than insomnia. These findings
highlight the importance of targeting sleep disturbances to
mitigate tau-related pathology, protect cognitive function,
and slow disease progression. Early diagnosis and targeted
interventions for sleep disturbances could provide
significant therapeutic benefits in managing AD and
improving patient outcomes.},
cin = {INM-7},
ddc = {610},
cid = {I:(DE-Juel1)INM-7-20090406},
pnm = {5252 - Brain Dysfunction and Plasticity (POF4-525)},
pid = {G:(DE-HGF)POF4-5252},
typ = {PUB:(DE-HGF)16},
doi = {10.1002/alz70856_099181},
url = {https://juser.fz-juelich.de/record/1052289},
}