精神分裂症病理反向翻译成小鼠显示海马活动过度,精神病行为和超同步事件
Daniel S Scott1,2, Muthumeenakshi Subramanian1, Jun Yamamoto3,4,5
1Department of Psychiatry, The University of Texas Southwestern Medical Center, Dallas, TX, USA.
Molecular psychiatry
|October 15, 2024
概括
在小鼠青春期抑制牙状环导致海马过度活跃和类似精神病的行为,这表明精神病生物标志物的关键发育窗口.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 发展生物学 发展生物学
背景情况:
- 海马功能障碍与精神病有关,精神分裂症在牙状回形中显示了减少的NMDAR GluN1和CA3/CA1.1中的过度活动.
- 作为精神病生物标志物,海马活动过度的潜在机制尚不清楚.
- 之前的研究表明,牙状 (DG) 特定的GluN1 KO小鼠表现出过度活跃和与精神病相关的行为.
研究的目的:
- 研究在发育过程中DG抑制对海马体功能和行为的影响.
- 为了确定在特定发育时期的DG抑制是否会导致类似精神病的结果.
- 探索海马活动过度的出现,作为潜在的精神病生物标志物.
主要方法:
- 抑制性DREADD (仅由设计者药物激活的设计者受体) 在小鼠DG颗粒细胞中表达.
- 青少年 (6周) 和成年 (10周) 的小鼠在21天内使用化合物21 (C21) 进行了连续的DG抑制.
- 评估了抑制后,海马活动 (cFos,局部场势) 和行为 (社会认知,空间工作记忆).
主要成果:
- 青少年DG抑制导致CA3/CA1的过度活跃,社会认知和空间工作记忆受损.
- 在青少年DG抑制后,在海马局部场潜力中观察到超同步事件 (HSEs).
- 成人DG抑制并没有产生这些过度活跃或行为变化.
结论:
- 在小鼠中,青少年DG抑制会诱导持续的海马活动过度和类似精神病的行为.
- 存在一个敏感的发育时期,在这个时期,DG抑制会影响海马的功能和行为.
- 这些发现凸显了总局在与精神病风险相关的发展轨迹中的作用.
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