来源:科技部生物中心 | 2023-01-18 15:40:51 |
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随着现代社会生活节奏的加快,睡眠障碍已成为不容忽视的健康问题。据中国睡眠研究会发布的《2022中国国民健康睡眠白皮书》显示,约3/4人群曾存在睡眠困扰,其中失眠人群占23.5%。生活事件所引起的压力性应激是失眠发生的主要原因。
近日,陆军军医大学与重庆医科大学研究团队合作发现,丘脑室旁核(paraventricular thalamus, PVT)→中央杏仁核(central amygdale, CeA)神经环路参与调控生理觉醒,并介导急性压力性应激所致的失眠。该研究综合运用神经电生理记录、光纤钙活动记录、光遗传学和化学遗传学等多种技术手段,发现激活PVT→CeA神经环路可诱发稳定睡眠的小鼠向觉醒转换。当给予小鼠应激刺激后,可显著激活PVT→CeA神经环路,引起小鼠出现入睡潜伏期延长、觉醒潜伏期缩短、觉醒时间增加等急性失眠表现。相关研究成果发表在《Cell Reports》杂志上,题为“A paraventricular thalamus to central amygdala neural circuit modulates acute stress-induced heightened wakefulness”。
综上,该研究揭示了PVT→CeA神经环路参与睡眠觉醒调控、及应激导致压力性失眠的神经环路机制,为临床上阐明失眠等睡眠障碍的发病机制、开发新的干预治疗策略奠定了理论基础。
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