Pioneer GABA cells comprise a subpopulation of hub neurons in the developing hippocampus.

Pioneer GABA cells comprise a subpopulation of hub neurons in the developing hippocampus.
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DOI:
10.1016/j.neuron.2011.06.018
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发表时间:
2011-08-25
期刊:
影响因子:
16.2
通讯作者:
Cossart R
Cossart R
中科院分区:
医学1区
文献类型:
--
作者:
Picardo MA;Guigue P;Bonifazi P;Batista-Brito R;Allene C;Ribas A;Fishell G;Baude A;Cossart R

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发育中的海马体的连通性显示了一个在支持网络同步方面特别有效的功能组织,因为它包括超级连接的中枢神经元。我们以前已经证明,中枢网络功能是由GABA神经元亚群支持的。然而,尚不清楚中枢细胞是暂时存在的,还是后来发展成不同的中间神经元亚类。考虑到GABA神经元的异质性和标记物的早期表达不良,这些问题很难评估。为了绕过这个难题,我们使用了“遗传命运图”,它允许根据GABA神经元的起源地点和时间对其进行选择性标记。我们表明,早期生成的GABA细胞形成了一个中枢神经元亚群,其特征是异常广泛的轴突分枝,以及在受到刺激时单手影响网络动力学的能力。先锋中枢神经元一直保持到成年期,在那里它们获得了长距离投射的GABA神经元的经典标记。
Connectivity in the developing hippocampus displays a functional organization particularly effective in supporting network synchronization, as it includes superconnected hub neurons. We have previously shown that hub network function is supported by a subpopulation of GABA neurons. However it is unclear whether hub cells are only transiently present or later develop into distinctive subclasses of interneurons. These questions are difficult to assess given the heterogeneity of the GABA neurons and the poor early expression of markers. To circumvent this conundrum we used “genetic fate mapping” that allows for the selective labelling of GABA neurons based on their place and time of origin. We show that early generated GABA cells form a subpopulation of hub neurons, characterized by an exceptionally widespread axonal arborisation and the ability to single-handedly impact network dynamics when stimulated. Pioneer hub neurons remain into adulthood where they acquire the classical markers of long-range projecting GABA neurons.
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