在海马体依赖性学习之后的睡眠剥夺会降低侧向和中部内皮层内部神经元的突触输入
Vinodh Balendran1, Jiyang Liu1, Katelin Wu1
1Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48019, USA.
Sleep
|February 20, 2026
概括
短暂的睡眠剥夺会改变脑内皮层中的突触结构,影响记忆处理. 睡眠丧失在侧侧和中侧脑内皮层中不同影响内部神经元的刺激输入.
科学领域:
- 神经科学是一个神经科学.
- 睡眠研究 睡眠研究
- 突触性可塑性 突触性可塑性
背景情况:
- 众所周知,睡眠不足会损害包括记忆在内的认知功能.
- 海马依赖于从脑内皮层 (EC) 的新皮层输入来处理记忆.
- 睡眠不足对欧盟内部神经元突触结构的具体影响尚不清楚.
研究的目的:
- 为了研究短暂的睡眠剥夺如何影响横向和中部内皮层 (LEC和MEC) 索马托斯坦素表达 (SST+) 内神经元的突触结构.
- 确定睡眠剥夺对学习后这些内神经元的激发性突触输入的后果.
主要方法:
- 利用Brainbow 3.0用于雄性小鼠中LEC和MEC SST+ 内神经元的突触标记.
- 在上下文恐惧条件化 (CFC) 之后,与睡眠或睡眠剥夺 (SD) 后的突触结构进行比较.
- 通过免疫组织化学评估EC神经元中的活动依赖cFos表达.
主要成果:
- 在CFC后的睡眠剥夺改变了LECSST+内部神经元中的树突脊柱类型和脊柱大小的减少.
- 睡眠剥夺在MEC SST+ 内神经元中降低了树突性脊柱的整体密度,而没有改变脊柱类型或大小.
- 睡眠不足增加了非SST+神经元中对SST+内神经元的cFos表达的比率.
结论:
- 在睡眠剥夺后,EC中SST+内部神经元的激发性突触输入减少,在LEC和MEC有明显的影响.
- 睡眠丧失通过改变海马体EC输入中的刺激/抑制平衡来破坏海马体依赖的记忆.
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