著者

Ranji Cui Bingjin Li Katsuya Suemaru Hiroaki Araki

出版者

(公社)日本薬理学会

雑誌

Journal of Pharmacological Sciences (ISSN:13478613)

巻号頁・発行日

vol.109, no.4, pp.518-524, 2009 (Released:2009-04-17)

参考文献数

53

被引用文献数

1 6 3

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We have previously reported that sleep patterns are significantly affected by both physical and psychological stress induced by a communication box; however, the mechanism by which stress alters sleep patterns was not established. In the present study, we investigated the role of γ-aminobutyric acid (GABA), acting through the GABAB receptor, on stress-induced changes in sleep patterns. Our results show that physical stress increased the total wakefulness time by increasing sleep latency and inhibiting both rapid eye movement (REM) and non rapid eye movement (NREM) sleep during a 6 h sleep–recording period. The GABAB agonist baclofen (20 pmol/2 μl) attenuated the effects of physical stress on sleep latency, total wakefulness, and NREM sleep, but not total REM sleep. In contrast, psychological stress enhanced total REM sleep and shortened REM sleep latency without altering other sleep patterns. The effect of psychological stress on total REM sleep was also reversed by baclofen. These results suggest that GABA via GABAB receptors may play a role in the regulation of specific sleep patterns by both physical and psychological stress.