ArticleBrain communications2025
Article in Brain communications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
8 authors.
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Abstract
Sleep duration and Apolipoprotein E genotype are critical factors influencing Alzheimer's disease progression. This study investigates the interaction between sleep duration and Apolipoprotein E genotype on the functional connectivity of the locus coeruleus in clinically unimpaired older adults with elevated amyloid beta, a population at risk for pre-clinical Alzheimer's disease. The study included 692 clinically unimpaired older adults with elevated amyloid beta participants from the Anti-Amyloid Treatment in Asymptomatic Alzheimer's Study (A4). Resting-state functional MRI data were analysed to construct locus coeruleus-based functional connectivity networks, and a 2 × 2 analysis of covariance was conducted to examine the main and interactive effects of sleep duration (normal versus short sleep) and Apolipoprotein E genotype (ɛ4- versus ɛ4+) on locus coeruleus-functional connectivity. Structural equation modelling was used to explore whether locus coeruleus-functional connectivity mediated the relationship between age and cognitive performance. Significant main effects of sleep duration and Apolipoprotein E genotype on locus coeruleus-functional connectivity were observed in the right temporal pole, middle cingulate cortex, and superior temporal gyrus. An interactive effect of sleep and Apolipoprotein E genotype was noted, influencing left locus coeruleus-functional connectivity in regions in the precentral gyrus, and right locus coeruleus-functional connectivity network in the middle temporal gyrus and lateral orbitofrontal cortex. Mediation analysis revealed that locus coeruleus-functional connectivity in the middle cingulate cortex and lateral orbitofrontal cortex partially mediated age associated cognitive decline. These findings suggest that locus coeruleus-functional connectivity networks, influenced by sleep duration and Apolipoprotein E genotype, play a crucial role in cognitive aging, particularly in memory function. Understanding these interactions may inform early intervention strategies to preserve cognitive health in older adults at risk for Alzheimer's disease.
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