Excitatory extrinsic afferents to striatal interneurons and interactions with striatal microcircuitry.

Excitatory extrinsic afferents to striatal interneurons and interactions with striatal microcircuitry.
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激发纹状体中间神经元的兴奋性外在传入以及与纹状体微电路的相互作用。

DOI:
10.1111/ejn.13881
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发表时间:
2019-03
期刊:
The European journal of neuroscience
影响因子:
--
通讯作者:
Tepper JM
Tepper JM
中科院分区:
其他
文献类型:
--
作者:
Assous M;Tepper JM

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纹状体构成基底神经节的主要输入结构,并接收来自皮质和丘脑的两种主要兴奋性神经递质输入。兴奋性皮质-和丘脑-纹状体连接支配纹状体的主要神经元,即多刺投射神经元(spiny projection neurons,SPN),其构成纹状体的主要细胞输入以及唯一输出。此外,皮质纹状体和丘脑纹状体输入也支配纹状体中间神经元。这些输入中的一些已经被很好地研究,例如胆碱能中间神经元的丘脑神经支配和纹状体快速尖峰中间神经元的皮质神经支配,但大多数其他GABA能中间神经元的输入仍然在很大程度上未被研究,部分原因是这些中间神经元中的许多相对较新的识别和表征。在这篇综述中,我们将讨论和调和一些旧的,以及最近的外部兴奋性输入纹状体中间神经元的数据。我们建议,传统的前馈抑制模型的皮质输入的快速尖峰interneuron然后抑制SPN,通常被认为是纹状体interneuron的主要功能组织的原型,是不完整的。我们提供的证据表明,纹状体中间神经元的外部神经支配是不统一的,但表现出很大的细胞类型的特异性。此外,我们将审查数据显示,纹状体中间神经元本身是相互连接的高度细胞类型特异性的方式。这些数据表明,纹状体活动的外部输入的影响,关键取决于神经元间回路内的突触相互作用。
The striatum constitutes the main input structure of the basal ganglia and receives two major excitatory glutamatergic inputs, from the cortex and the thalamus. Excitatory cortico- and thalamostriatal connections innervate the principal neurons of the striatum, the spiny projection neurons (SPNs), which constitute the main cellular input as well as the only output of the striatum. In addition, corticostriatal and thalamostriatal inputs also innervate striatal interneurons. Some of these inputs have been very well studied, for example the thalamic innervation of cholinergic interneurons and the cortical innervation of striatal fast-spiking interneurons, but inputs to most other GABAergic interneurons remain largely unstudied, due in part to the relatively recent identification and characterization of many of these interneurons. In this review, we will discuss and reconcile some older as well as more recent data on the extrinsic excitatory inputs to striatal interneurons. We propose that the traditional feed-forward inhibitory model of the cortical input to the fast-spiking interneuron then inhibiting the SPN, often assumed to be the prototype of the main functional organization of striatal interneurons, is incomplete. We provide evidence that the extrinsic innervation of striatal interneurons is not uniform but shows great cell-type specificity. In addition, we will review data showing that striatal interneurons are themselves interconnected in a highly cell-type-specific manner. These data suggest that the impact of the extrinsic inputs on striatal activity critically depends on synaptic interactions within interneuronal circuitry.
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发表时间: 2015-07
期刊: The European journal of neuroscience
影响因子: --
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