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微RNA-218-5p协调在恒常性突触可塑性期间激发性和抑制性突触的缩放

David Colameo¹, Sara M Maley^1,2, Jochen Winterer¹

¹Laboratory of Systems Neuroscience, Institute for Neuroscience, Department of Health Science and Technology, ETH Zurich, Zurich 8057, Switzerland.

Proceedings of the National Academy of Sciences of the United States of America

|April 2, 2025

概括

微RNA-218-5p在恒常性可塑性期间协调激发性和抑制性突触,这对于稳定的大脑功能和睡眠至关重要. 抑制这种microRNA会破坏突触缩放和睡眠模式.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学
突触性可塑性突触性可塑性

背景情况:

恒常性突触可塑性 (HSP) 通过调整突触强度来稳定神经网络.
在HSP期间,刺激性和抑制性突触都受到调节,但协调分子仍然未知.

研究的目的:

调查miR-218-5p在调节激发性和抑制性突触中的作用,在同居突触缩小 (HSD) 期间.
确定miR-218-5p是否协调突触缩放并影响睡眠生理.

主要方法:

对受PTX诱导的HSD影响的基因中的microRNA结合部位的生物信息分析.
在老鼠海马神经元中的电生理学记录和共聚焦显微镜.
在老鼠体感皮质中长期的脑电图记录.

主要成果:

在PTX治疗后,miR-218-5p活性增加.
抑制miR-218-5p阻断了刺激性突触和树突性脊柱缩小.
抑制miR-218-5p减弱了抑制突触升级的作用.
Mdga1被确定为直接的miR-218-5p标,参与抑制突触调节.
当地的miR-218-5p抑制减少了非REM睡眠期间的慢波活动.

结论:

miR-218-5p 是一个关键的调节器,在恒常性可塑性期间协调激发性和抑制性突触.
miR-218-5p在维持神经电路稳定性和睡眠调节方面发挥着重要作用.
这些发现提供了关于神经电路稳定性的见解,以及对病理生理学的潜在影响.

关键词:

激发性和抑制性的突触缩放.恒常的同步突触可塑性恒常的突触可塑性这是一个微型RNA.非REM睡眠的非REM睡眠睡眠依赖的突触可塑性

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