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鼠标上性核内内大麻素系统组件的时间和空间布局

Timothy D Niepokny¹, Hunter Frey-Burkart², Eric M Mintz³

¹School of Biomedical Sciences, Kent State University, 1275 University Esplanade, Kent, OH 44242, USA; Brain Health Research Institute, Kent State University, 1275 University Esplanade, Kent, OH 44242, USA.

|November 21, 2024

概括

内激素系统 (ECS) 调节大脑中昼夜时钟的功能. 这项研究揭示了ECS组件的节奏表达,特别是大麻素受体1 (CB1),在上神核 (SCN).

科学领域:

神经科学是一个神经科学.
时间生物学时间生物学
分子生物学分子生物学

背景情况:

上神核 (SCN) 是中心的昼夜节律起器,受到环境光线的影响.
内分泌大麻素系统 (ECS) 是一种神经调节系统,对SCN具有双向作用,但其在昼夜调节中的作用尚不清楚.

研究的目的:

在SCN中调查ECS的时间和空间分子特征.
为了确定在不同照明条件下的雄性和雌性小鼠中ECS组件的存在和节奏性.

主要方法:

激光捕获微剖析和定量RT-PCR用于分析ECS基因表达.
用RNAscope in situ杂交来确定SCN内的ECS组件的空间定位.
应用了共分析来识别昼夜节律.

主要成果:

在19个检查的ECS组件中,13个被检测到在SCN中.
存在用于内分泌素合成和降解的酶机制,大麻素受体1 (Cnr1) 是唯一被检测到的ECS受体.
在许多ECS组件中,在两性和照明条件下都观察到循环节律.
Cnr1主要表达在SCN神经元中,在VIP神经元表达较低,而Fabp7在星球细胞中被发现.

结论:

欧洲神经系统,特别是通过神经元CB1信号传递,在SCN内调节昼夜钟功能的过程中发挥作用.
在SCN内,ECS信号的局部调节有助于昼夜节律.

关键词:

循环节律是指循环节律的节奏.内分泌大麻素是什么?内分泌大麻素是什么?内分泌大麻素是什么超基亚斯马斯核的核.

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