Altered resting-state functional connectivity patterns in late middle-aged and older adults with obstructive sleep apnea.

Détails

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Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_3EE4EDF8850E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Altered resting-state functional connectivity patterns in late middle-aged and older adults with obstructive sleep apnea.
Périodique
Frontiers in neurology
Auteur⸱e⸱s
Martinez Villar G., Daneault V., Martineau-Dussault M.È., Baril A.A., Gagnon K., Lafond C., Gilbert D., Thompson C., Marchi N.A., Lina J.M., Montplaisir J., Carrier J., Gosselin N., André C.
ISSN
1664-2295 (Print)
ISSN-L
1664-2295
Statut éditorial
Publié
Date de publication
2023
Peer-reviewed
Oui
Volume
14
Pages
1215882
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: epublish
Résumé
Obstructive sleep apnea (OSA) is increasingly recognized as a risk factor for cognitive decline, and has been associated with structural brain alterations in regions relevant to memory processes and Alzheimer's disease. However, it is unclear whether OSA is associated with disrupted functional connectivity (FC) patterns between these regions in late middle-aged and older populations. Thus, we characterized the associations between OSA severity and resting-state FC between the default mode network (DMN) and medial temporal lobe (MTL) regions. Second, we explored whether significant FC changes differed depending on cognitive status and were associated with cognitive performance.
Ninety-four participants [24 women, 65.7 ± 6.9 years old, 41% with Mild Cognitive Impairment (MCI)] underwent a polysomnography, a comprehensive neuropsychological assessment and a resting-state functional magnetic resonance imaging (MRI). General linear models were conducted between OSA severity markers (i.e., the apnea-hypopnea, oxygen desaturation and microarousal indices) and FC values between DMN and MTL regions using CONN toolbox. Partial correlations were then performed between OSA-related FC patterns and (i) OSA severity markers in subgroups stratified by cognitive status (i.e., cognitively unimpaired versus MCI) and (ii) cognitive scores in the whole sample. All analyzes were controlled for age, sex and education, and considered significant at a p < 0.05 threshold corrected for false discovery rate.
In the whole sample, a higher apnea-hypopnea index was significantly associated with lower FC between (i) the medial prefrontal cortex and bilateral hippocampi, and (ii) the left hippocampus and both the posterior cingulate cortex and precuneus. FC patterns were not associated with the oxygen desaturation index, or micro-arousal index. When stratifying the sample according to cognitive status, all associations remained significant in cognitively unimpaired individuals but not in the MCI group. No significant associations were observed between cognition and OSA severity or OSA-related FC patterns.
OSA severity was associated with patterns of lower FC in regions relevant to memory processes and Alzheimer's disease. Since no associations were found with cognitive performance, these FC changes could precede detectable cognitive deficits. Whether these FC patterns predict future cognitive decline over the long-term needs to be investigated.
Mots-clé
Neurology (clinical), Neurology, aging, default mode network, hippocampus, medial prefrontal cortex, medial temporal lobe, posterior cingulate cortex, resting-state functional connectivity, sleep-disordered breathing
Pubmed
Web of science
Open Access
Oui
Création de la notice
05/07/2023 18:59
Dernière modification de la notice
23/01/2024 8:23
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