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Embryonic progenitor pools generate diversity in fine-scale excitatory cortical subnetworks.
Nature Communications ( IF 14.7 ) Pub Date : 2019-11-19 , DOI: 10.1038/s41467-019-13206-1
Tommas J Ellender 1 , Sophie V Avery 1 , Kashif Mahfooz 1 , Jakub Scaber 2 , Alexander von Klemperer 1 , Sophie L Nixon 1 , Matthew J Buchan 1 , Joram J van Rheede 1 , Aleksandra Gatti 1 , Cameron Waites 1 , Hania J Pavlou 2 , David Sims 2 , Sarah E Newey 1 , Colin J Akerman 1
Affiliation  

The mammalian neocortex is characterized by a variety of neuronal cell types and precise arrangements of synaptic connections, but the processes that generate this diversity are poorly understood. Here we examine how a pool of embryonic progenitor cells consisting of apical intermediate progenitors (aIPs) contribute to diversity within the upper layers of mouse cortex. In utero labeling combined with single-cell RNA-sequencing reveals that aIPs can generate transcriptionally defined glutamatergic cell types, when compared to neighboring neurons born from other embryonic progenitor pools. Whilst sharing layer-associated morphological and functional properties, simultaneous patch clamp recordings and optogenetic studies reveal that aIP-derived neurons exhibit systematic biases in both their intralaminar monosynaptic connectivity and the post-synaptic partners that they target within deeper layers of cortex. Multiple cortical progenitor pools therefore represent an important factor in establishing diversity amongst local and long-range fine-scale glutamatergic connectivity, which generates subnetworks for routing excitatory synaptic information.

中文翻译:


胚胎祖细胞池在精细尺度的兴奋性皮层子网络中产生多样性。



哺乳动物新皮质的特点是具有多种神经元细胞类型和突触连接的精确排列,但产生这种多样性的过程却知之甚少。在这里,我们研究了由顶端中间祖细胞(aIP)组成的胚胎祖细胞库如何促进小鼠皮质上层的多样性。子宫内标记与单细胞 RNA 测序相结合表明,与其他胚胎祖细胞库中产生的邻近神经元相比,aIP 可以生成转录定义的谷氨酸能细胞类型。虽然共享层相关的形态和功能特性,但同步膜片钳记录和光遗传学研究表明,aIP 衍生的神经元在其层内单突触连接性和它们在皮层更深层中针对的突触后伙伴方面表现出系统偏差。因此,多个皮质祖细胞池代表了在局部和远程精细谷氨酸连接之间建立多样性的重要因素,它生成用于路由兴奋性突触信息的子网络。
更新日期:2019-11-19
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