A novel neurological function of rice bran: a standardized rice bran supplement promotes non-rapid eye movement sleep in mice through histamine H-1 receptors

作者：Um, Min Young; Kim, Sojin; Jin, Young-Ho; Yoon, Minseok; Yang, Hyejin; Lee, Jaekwang; Jung, Jonghoon; Urade, Yoshihiro; Huang, Zhi-Li; Kwon, Sangoh; Cho, Suengmok^*

来源：Molecular Nutrition & Food Research, 2017, 61(11): 1700316.

DOI：10.1002/mnfr.201700316

• Doxepin
• Histamine H-1 receptor
• Hypnotic
• Rice bran
• Sleep

Scope: Although rice bran has been shown to be associated with a wide spectrum of health benefits, to date, there are no reports on its effects on sleep. We investigated the effect of rice bran on sleep and the mechanism underlying this effect.
Methods and results: Electroencephalography was used to evaluate the effects of standardized rice bran supplement (RBS) and doxepin hydrochloride (DH), a histamine H-1 receptor (H1R) antagonist used as a positive control, on sleep in mice. The mechanism of RBS action was investigated using knockout (KO) mice and ex vivo electrophysiological recordings. Oral administration of RBS and DH significantly decreased sleep latency and increased the amount of non-rapid eye movement sleep (NREMS) in mice. Similar to DH, RBS fully inhibited H1R agonist-induced increase in action potential frequency in tuberomammillary nucleus neurons. In H1R KO mice, neither RBS nor DH administration led to the increase in NREMS and decrease in sleep latency observed in WT mice. These results indicate that the sleep-promoting effect of RBS is completely dependent on H1R antagonism.
Conclusions: RBS decreases sleep latency and promotes NREMS through the inhibition of H1R, suggesting that it could be a promising therapeutic agent for insomnia.

• 出版日期2017-11
• 单位复旦大学; 医学神经生物学国家重点实验室