Alzheimer's disease; ageing; human; memory; neuroscience; sleep; sleep slow waves; General Immunology and Microbiology; General Biochemistry, Genetics and Molecular Biology; General Medicine; General Neuroscience
Abstract :
[en] Sleep alteration is a hallmark of ageing and emerges as a risk factor for Alzheimer's disease (AD). While the fine-tuned coalescence of sleep microstructure elements may influence age-related cognitive trajectories, its association with AD processes is not fully established. Here, we investigated whether the coupling of spindles and slow waves (SW) is associated with early amyloid-β (Aβ) brain burden, a hallmark of AD neuropathology, and cognitive change over 2 years in 100 healthy individuals in late-midlife (50-70 years; 68 women). We found that, in contrast to other sleep metrics, earlier occurrence of spindles on slow-depolarisation SW is associated with higher medial prefrontal cortex Aβ burden (p=0.014, r²β*=0.06) and is predictive of greater longitudinal memory decline in a large subsample (p=0.032, r²β*=0.07, N=66). These findings unravel early links between sleep, AD-related processes, and cognition and suggest that altered coupling of sleep microstructure elements, key to its mnesic function, contributes to poorer brain and cognitive trajectories in ageing.
Disciplines :
Neurology Neurosciences & behavior
Author, co-author :
Chylinski, Daphné ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Sleep and chronobiology
Van Egroo, Maxime ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Sleep and chronobiology
Narbutas, Justinas ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Aging & Memory
Muto, Vincenzo ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging
Bahri, Mohamed Ali ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Aging & Memory
Berthomier, Christian; Physip SA, Paris, France
SALMON, Eric ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Aging & Memory
Bastin, Christine ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Aging & Memory
Phillips, Christophe ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Neuroimaging, data acquisition and processing
Collette, Fabienne ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Aging & Memory
MAQUET, Pierre ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Sleep and chronobiology ; Centre Hospitalier Universitaire de Liège - CHU > > Service de neurologie
Carrier, Julie ; Centre for Advanced Research in Sleep Medicine, Université de Montréal, Montreal, Canada
Lina, Jean-Marc; Centre for Advanced Research in Sleep Medicine, Université de Montréal, Montreal, Canada
Vandewalle, Gilles ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Sleep and chronobiology
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] FWB - Fédération Wallonie-Bruxelles [BE] ERDF - European Regional Development Fund [BE] CIHR - Canadian Institutes of Health Research [CA] GE - General Electric [US-MA] [US-MA] Fondation Recherche Alzheimer [BE]
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