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含有索马托斯坦的皮质内神经元的基因定义的亚型
Rachel E Hostetler1, Hang Hu1, Ariel Agmon2
1Department of Neuroscience, West Virginia University Rockefeller Neuroscience Institute, Morgantown, WV 26506.
eNeuro
|July 18, 2023
概括
研究人员开发了新的遗传工具,以访问小鼠皮质中含有体静止素 (SOM) 内神经元的特定亚型. 这允许详细研究它们在大脑功能和行为中的作用.
科学领域:
- 神经科学是一个神经科学.
- 皮层电路的皮层电路.
- 内部神经元多样性的多样性
背景情况:
- 抑制性内部神经元对于哺乳动物大脑皮层的发育和功能至关重要.
- 含有索马托斯坦素 (SOM) 的内神经元是多样化的子类,最近的研究将它们分为13种形态电转录组 (MET) 类型.
- 现有的SOM内部神经元分类方案缺乏明确的整合,对MET类型的实验性访问是有限的.
研究的目的:
- 建立对特定的SOM内部神经元子集的实验性访问.
- 为了将遗传身份与轴突向和分子标记器相关联.
- 描述定义的SOM内部神经元子集的电生理学特性.
主要方法:
- 使用Flp和Cre驱动器线路与双色交叉记者交叉,以便对SOM子集的遗传访问.
- 从海皮表面的逆行染料标记识别了1层投射神经元.
- 标记蛋白和ex vivo全细胞记录的免疫抑制分析了神经元特性.
主要成果:
- 确定了两种不同的1层向SOM亚型,具有非重叠的标记物表达和电生理学.
- 这些亚型,加上已知的4层向亚型,占5层SOM细胞的50%以上,占所有SOM细胞的40%以上.
- 确定的亚型似乎对应于13种已确定的MET类型中的5种.
结论:
- 开发的遗传工具为特定的SOM内部神经元亚型提供了至关重要的实验性访问.
- 这些发现将遗传分类与解剖学和电生理学属性联系起来,弥合了现有的分类方案.
- 未来的研究现在可以调查这些定义的SOM内部神经元群体在皮层计算和行为中的突触连接和功能作用.
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