Genetic versus stress and mood determinants of sleep in the Amish.
Am J Med Genet B Neuropsychiatr Genet
; 186(2): 113-121, 2021 03.
Article
in En
| MEDLINE
| ID: mdl-33650257
ABSTRACT
Sleep is essential to the human brain and is regulated by genetics with many features conserved across species. Sleep is also influenced by health and environmental factors; identifying replicable genetic variants contributing to sleep may require accounting for these factors. We examined how stress and mood disorder contribute to sleep and impact its heritability. Our sample included 326 Amish/Mennonite individuals with a lifestyle with limited technological interferences with sleep. Sleep measures included Pittsburgh Sleep Quality Index (PSQI), bedtime, wake time, and time to sleep onset. Current stress level, cumulative life stressors, and mood disorder were also evaluated. We estimated the heritability of sleep features and examined the impact of current stress, lifetime stress, mood diagnosis on sleep quality. The results showed current stress, lifetime stress, and mood disorder were independently associated with PSQI score (p < .05). Heritability of PSQI was low (0-0.23) before and after accounting for stress and mood. Bedtime, wake time, and minutes to sleep time did show significant heritability at 0.44, 0.42, and 0.29. However, after adjusting for shared environment, only heritability of wake time remained significant. Sleep is affected by environmental stress and mental health factors even in a society with limited technological interference with sleep. Wake time may be a more biological marker of sleep as compared to the evening measures which are more influenced by other household members. Accounting for nongenetic and partially genetic determinants of sleep particularly stress and mood disorder is likely important for improving the precision of genetic studies of sleep.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sleep Wake Disorders
/
Stress, Psychological
/
Mood Disorders
/
Amish
Type of study:
Observational_studies
/
Prognostic_studies
/
Qualitative_research
/
Risk_factors_studies
Limits:
Adult
/
Female
/
Humans
/
Male
Country/Region as subject:
America do norte
Language:
En
Journal:
Am J Med Genet B Neuropsychiatr Genet
Journal subject:
GENETICA MEDICA
/
NEUROLOGIA
/
PSIQUIATRIA
Year:
2021
Document type:
Article
Affiliation country:
United States