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A variant in orexin receptor-2 is associated with self-reported daytime sleepiness in the Japanese population
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A variant in orexin receptor-2 is associated with self-reported daytime sleepiness in the Japanese population
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Journal Article
A variant in orexin receptor-2 is associated with self-reported daytime sleepiness in the Japanese population
2022
Overview
Excessive daytime sleepiness is characterized by a persistent feeling of having trouble staying awake, typically with inappropriate sleep episodes. Orexin (hypocretin) is a neuropeptide that regulates sleep-wake cycles and rapid eye movement sleep. Several large-scale genome-wide association studies (GWASs) in European populations have found genetic variants in orexin receptor-1 (OX1R) and -2 (OX2R) that are associated with sleep traits including daytime sleepiness. To identify genetic variants associated with daytime sleepiness, we performed an association study of genetic variants in prepro-orexin, OX1R, and OX2R in 14,329 Japanese individuals from the Tohoku Medical Megabank Project cohort. A genetic variant in OX2R was significantly associated with self-reported daytime sleepiness after Bonferroni correction (rs188018846: P = 8.4E−05). In addition, a missense variant in OX2R identified by the European GWASs showed a nominally significant association with daytime sleepiness in a Japanese population (p.Ile308Val, rs2653349: P = 0.044). Multiple genetic variants in OX2R can affect daytime sleepiness in general populations.
Publisher
Nature Publishing Group
