HaiXiang Ma, LeYuan Gu, YuLing Wang, Qing Xu, Yuanli Zhang, WeiHui Shao, Qian Yu, XiTing Lian, Lu Liu, JiaXuan Gu, Na Ji, XiaoLing Liu, Kazuki Nagayasu, HongHai Zhang
General anesthesia is widely used in various clinical practices due to its ability to cause loss of consciousness. However, the exact mechanism of anesthesia-induced unconsciousness remains unclear. It is generally thought that arousal-related brain nuclei are involved. 5-Hydroxytryptamine (5-HT) is closely associated with sleep arousal. Here, we explore the role of the 5-HT system in anesthetic awakening through pharmacological interventions and optogenetic techniques. Our data showed that exogenous administration of 5-hydroxytryptophan (5-HTP) and optogenetic activation of 5-HT neurons in the dorsal raphe nucleus (DR) could significantly shorten the emergence time of sevoflurane anesthesia in mice, suggesting that regulation of the 5-HT system using both endogenous and exogenous approaches could mediate delayed emergence...
July 29, 2023: Molecular Neurobiology