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首页> 外文期刊>Neuron >Axo-axonic Innervation of Neocortical Pyramidal Neurons by GABAergic Chandelier Cells Requires AnkyrinG-Associated L1CAM
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Axo-axonic Innervation of Neocortical Pyramidal Neurons by GABAergic Chandelier Cells Requires AnkyrinG-Associated L1CAM

机译:Gabaeric Chandelier细胞Neocortical金字塔神经元的轴 - 轴理支配型枝条内部需要Ankyring相关的L1CAM

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摘要

Among the diverse interneuron subtypes in the neocortex, chandelier cells (ChCs) are the only population that selectively innervate pyramidal neurons (PyNs) at their axon initial segment (AIS), the site of action potential initiation, allowing them to exert powerful control over PyN output. Yet, mechanisms underlying their subcellular innervation of PyN AISs are unknown. To identify molecular determinants of ChC/PyN AIS innervation, we performed an in vivo RNAi screen of PyN-expressed axonal cell adhesion molecules (CAMs) and select Ephs/ephrins. Strikingly, we found the L1 family member L1CAM to be the only molecule required for ChC/PyN AIS innervation. Further, we show that L1CAM is required during both the establishment and maintenance of innervation, and that selective innervation of PyN AISs by ChCs requires AIS anchoring of L1CAM by the cytoskeletal ankyrin-G/beta IV-spectrin complex. Thus, our findings identify PyN-expressed L1CAM as a critical CAM required for innervation of neocortical PyN AISs by ChCs.
机译:在Neocortex中的不同的型号亚型中,枝形细胞(CHC)是唯一只在其轴突初始段(AIS),动作潜在启动的部位的尾翼型神经元(PYNS)的唯一群体,允许它们在PYN上发挥强大的控制输出。然而,Pyn Aiss的亚细胞神经内部的机制是未知的。为了鉴定CHC / PYN AIS支配的分子决定簇,我们在Pyn表达的轴突细胞粘附分子(凸轮)的体内RNAi筛网中进行,选择EPHS / ephrins。令人惊讶的是,我们发现L1系列成员L1CAM是CHC / PYN AIS支配所需的唯一分子。此外,我们表明,在内脏的建立和维持期间需要L1CAM,并且CHCs的PYN AISS的选择性支配需要通过细胞骨骼Ankyrin-G /βIV-光谱络合物的AIS锚固L1CAM。因此,我们的研究结果将Pyn表达的L1CAM识别为通过CHC的Neocortical Pyn AISS支配所需的关键凸轮。

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  • 来源
    《Neuron》 |2019年第2期|共24页
  • 作者单位

    Cold Spring Harbor Lab POB 100 Cold Spring Harbor NY 11724 USA;

    Cold Spring Harbor Lab POB 100 Cold Spring Harbor NY 11724 USA;

    Cold Spring Harbor Lab POB 100 Cold Spring Harbor NY 11724 USA;

    Cold Spring Harbor Lab POB 100 Cold Spring Harbor NY 11724 USA;

    Cold Spring Harbor Lab POB 100 Cold Spring Harbor NY 11724 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 神经病学;
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