Electrical synapses convey orientation selectivity in the mouse retina.

Electrical synapses convey orientation selectivity in the mouse retina.
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DOI:
10.1038/s41467-017-01980-9
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发表时间:
2017-12-11
影响因子:
16.6
通讯作者:
Schwartz GW
Schwartz GW
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Nath A;Schwartz GW

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初级受体下游的感觉神经元对特定的刺激特征具有选择性,并且它们的选择性来自于来自其他神经元的兴奋性和抑制性突触输入以及它们自身的内在特性。由缝隙连接形成的电突触调节感觉回路。视网膜神经节细胞(RGC)是将视觉信息传递到大脑的多种特征检测器,并接受来自双极细胞的兴奋性输入和来自无长突细胞(AC)的抑制性输入。在这里,我们描述了一个RGC依赖于间隙连接,而不是化学突触,传达其选择性的视觉刺激的方向。这既代表了电突触作为特征选择性主要驱动因素的新功能作用,也代表了视网膜中方向选择性的新电路机制。由光感受器接收的视觉输入被中继到视网膜神经节细胞(RGC),其对某些取向的输入具有选择性。在这里,作者表明,间隙连接介导的输入到一种类型的RGC有助于其取向选择性。
Sensory neurons downstream of primary receptors are selective for specific stimulus features, and they derive their selectivity both from excitatory and inhibitory synaptic inputs from other neurons and from their own intrinsic properties. Electrical synapses, formed by gap junctions, modulate sensory circuits. Retinal ganglion cells (RGCs) are diverse feature detectors carrying visual information to the brain, and receive excitatory input from bipolar cells and inhibitory input from amacrine cells (ACs). Here we describe a RGC that relies on gap junctions, rather than chemical synapses, to convey its selectivity for the orientation of a visual stimulus. This represents both a new functional role of electrical synapses as the primary drivers of feature selectivity and a new circuit mechanism for orientation selectivity in the retina. Visual input received by photoreceptors is relayed to retinal ganglion cells (RGCs), which have selectivity for inputs of certain orientations. Here, the authors show that gap junction-mediated input onto one type of RGC contributes to its orientation selectivity.
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