中脑
加巴能
神经科学
导水管周围灰质
被盖腹侧区
七氟醚
唤醒
桥
多巴胺
麻醉
医学
心理学
中枢神经系统
抑制性突触后电位
多巴胺能
作者
Yongxin Guo,Yanping Song,Fuyang Cao,Ao Li,Xinyu Hao,Wenzhu Shi,Zhikang Zhou,Jiangbei Cao,Yanhong Liu,Weidong Mi,Tong Li
出处
期刊:iScience
[Elsevier]
日期:2023-09-01
卷期号:26 (9): 107486-107486
被引量:2
标识
DOI:10.1016/j.isci.2023.107486
摘要
The mechanism of general anesthesia remains elusive. The ventrolateral periaqueductal gray (vlPAG) in the midbrain regulates sleep and awake states. However, the role of vlPAG and its circuits in anesthesia is unclear. We utilized opto/chemogenetics, righting reflex, and electroencephalographic recording to assess consciousness changes. We employed fiber photometry to measure the activity of neurons and neurotransmitters. As a result, photometry recording showed that the activity of GABA neurons in vlPAG decreased during sevoflurane anesthesia and was reactivated after anesthesia. Activating GABAergic neurons in vlPAG promoted arousal during anesthesia, while inhibiting them delayed this process. Furthermore, medial prefrontal cortex (mPFC) to vlPAG pyramidal neurons projections and vlPAG to ventral tegmental area (VTA) GABAergic projections played a prominent role in the anesthesia-awake transition. GABA neurotransmitter activity of VTA synchronized with mPFC-vlPAG pyramidal neuron projections. Therefore, the cortico-midbrain circuits centered on vlPAG GABAergic neurons exert an arousal-promoting effect during sevoflurane anesthesia.
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