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Apolipoprotein E ɛ4 (APOE ɛ4) Allele is Associated with Long Sleep Duration Among Elderly with Cognitive Impairment
- Source :
- Journal of Alzheimer's Disease. 79:763-771
- Publication Year :
- 2021
- Publisher :
- IOS Press, 2021.
-
Abstract
- Background: Apolipoprotein E gene (APOE) ɛ4 allele increases the risk for Alzheimer’s disease (AD). Furthermore, among patients with cognitive impairment, longer sleep duration is associated with worse cognitive performance. To date, literature examining the associations between APOE ɛ4 allele and objective sleep duration is limited. Objective: Our aim was to assess the association between APOE ɛ4 and objective sleep duration, among patients with mild cognitive impairment (MCI) and AD. A sub-sample of 89 patients with AD (n = 49) and MCI (n = 40) were recruited from a large, population-based cohort of 3,140 elders (>60 years) residing on Crete, Greece. Methods: All participants underwent medical history/physical examination, extensive neuropsychiatric and neuropsychological evaluation, 3-day 24 h actigraphy and APOE ɛ4 allele genotyping. Comparisons of sleep duration variables between APOE ɛ4 allele carriers and non-carriers were assessed using ANCOVA, controlling for confounders. Results: The sample included 18 APOE ɛ4 carriers and 71 non-carriers, aged 78.6±6.6 and 78.2±6.5 years, respectively. Comparisons between the APOE ɛ4 carriers and non-carriers revealed no significant differences in terms of demographic and clinical variables. In terms of objective sleep duration across the two groups, APOE ɛ4 carriers compared to non-carriers had significantly longer nighttime Total Sleep Time (nTST) (7.7±1.4 versus 7.2±1.3 h, respectively, p = 0.011), as well as 24 h TST (8.5±1.6 versus 7.8±1.5 h, respectively, p = 0.012). Conclusion: Among patients with MCI and AD, APOE ɛ4 carriers have longer objective nighttime and 24 h sleep duration compared to non-carriers. These findings further support that objective long sleep duration is a genetically-driven pre-clinical marker associated with worse prognosis in elderly with cognitive impairment.
- Subjects :
- Genetic Markers
Male
Apolipoprotein E
medicine.medical_specialty
Time Factors
Apolipoprotein E4
Population
Alzheimer Disease
Internal medicine
Humans
Medicine
Cognitive Dysfunction
Effects of sleep deprivation on cognitive performance
Allele
education
Alleles
Aged
Aged, 80 and over
education.field_of_study
business.industry
General Neuroscience
Confounding
Neuropsychology
Actigraphy
General Medicine
Mental Status and Dementia Tests
Psychiatry and Mental health
Clinical Psychology
Case-Control Studies
Cohort
Female
Geriatrics and Gerontology
Sleep
business
Subjects
Details
- ISSN :
- 18758908 and 13872877
- Volume :
- 79
- Database :
- OpenAIRE
- Journal :
- Journal of Alzheimer's Disease
- Accession number :
- edsair.doi.dedup.....a45c4a3653e29d0a84e8f9c23b864b63
- Full Text :
- https://doi.org/10.3233/jad-200958