Stankeviciute, LauraFalcón, CarlesOperto, GrégoryGarcia, MarinaShekari, MahnazIranzo, AlexNiñerola-Baizán, AidaPerissinotti, AndrésMinguillón, CarolinaFauria, KarineMolinuevo, José LuisZetterberg, HenrikBlennow, KajSuárez-Calvet, MarcCacciaglia, RaffaeleGispert López, Juan DomingoGrau-Rivera, OriolALFA Study2023-09-082023-09-082023Stankeviciute L, Falcon C, Operto G, Garcia M, Shekari M, Iranzo Á, Niñerola-Baizán A, Perissinotti A, Minguillón C, Fauria K, Molinuevo JL, Zetterberg H, Blennow K, Suárez-Calvet M, Cacciaglia R, Gispert JD, Grau-Rivera O, ALFA study. Differential effects of sleep on brain structure and metabolism at the preclinical stages of AD. Alzheimers Dement. 2023 Dec;19(12):5371-86. DOI: 10.1002/alz.131021552-5260http://hdl.handle.net/10230/57836Introduction: Poor sleep quality is associated with cognitive outcomes in Alzheimer's disease (AD). We analyzed the associations between self-reported sleep quality and brain structure and function in cognitively unimpaired (CU) individuals. Methods: CU adults (N = 339) underwent structural magnetic resonance imaging, lumbar puncture, and the Pittsburgh Sleep Quality Index (PSQI) questionnaire. A subset (N = 295) performed [18F] fluorodeoxyglucose positron emission tomography scans. Voxel-wise associations with gray matter volumes (GMv) and cerebral glucose metabolism (CMRGlu) were performed including interactions with cerebrospinal fluid (CSF) AD biomarkers status. Results: Poorer sleep quality was associated with lower GMv and CMRGlu in the orbitofrontal and cingulate cortices independently of AD pathology. Self-reported sleep quality interacted with altered core AD CSF biomarkers in brain areas known to be affected in preclinical AD stages. Discussion: Poor sleep quality may impact brain structure and function independently from AD pathology. Alternatively, AD-related neurodegeneration in areas involved in sleep-wake regulation may induce or worsen sleep disturbances. Highlights Poor sleep impacts brain structure and function independent of Alzheimer's disease (AD) pathology. Poor sleep exacerbates brain changes observed in preclinical AD. Sleep is an appealing therapeutic strategy for preventing AD.application/pdfeng© 2023 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.info:eu-repo/semantics/articlehttp://dx.doi.org/10.1002/alz.13102Cerebrospinal fluid biomarkersFluorodeoxyglucose positron emission tomographyPreclinical Alzheimer's diseaseSleepStructural magnetic resonance imaginginfo:eu-repo/semantics/openAccess