Principles of interneuron development learned from Renshaw cells and the motoneuron recurrent inhibitory circuit.

Principles of interneuron development learned from Renshaw cells and the motoneuron recurrent inhibitory circuit.
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DOI:
10.1111/nyas.12084
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发表时间:
2013-03
影响因子:
5.2
通讯作者:
Siembab VC
Siembab VC
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Alvarez FJ;Benito-Gonzalez A;Siembab VC

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Renshaw细胞为研究运动行为发生过程中脊髓回路的发育提供了一个方便的模型,目的是捕捉中间神经元的规范和回路的构建原理。这项工作得益于长期的研究历史,这些研究产生了关于定义Renshaw细胞及其与运动神经元形成的循环抑制回路的基本知识。在这篇综述中,我们总结了最近关于Renshaw细胞及其连接规范的数据。这些研究的一个主要见解是,基本的Renshaw细胞表型在电路组装之前被指定,这是它们早期神经发生和迁移的结果。由于它们在脊髓中的位置限制,后来又增加了连通性。最后,不同的突触增殖速率改变了出生后Renshaw细胞中不同输入的相对权重。在此基础上,导出了脊髓中间神经元在运动回路发育过程中整合的一般原理。
Renshaw cells provide a convenient model to study spinal circuit development during the emergence of motor behaviors with the goal of capturing principles of interneuron specification and circuit construction. This work is facilitated by a long history of research that generated essential knowledge about the characteristics that define Renshaw cells and the recurrent inhibitory circuit they form with motoneurons. In this review, we summarize recent data on the specification of Renshaw cells and their connections. A major insight from these studies is that the basic Renshaw cell phenotype is specified before circuit assembly, a result of their early neurogenesis and migration. Connectivity is later added, constrained by their placement in the spinal cord. Finally, different rates of synapse proliferation alter the relative weights of different inputs on postnatal Renshaw cells. Based on this work some general principles on the integration of spinal interneurons in developing motor circuits are derived.
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