The spatial and temporal origin of chandelier cells in mouse neocortex.

The spatial and temporal origin of chandelier cells in mouse neocortex.
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DOI:
10.1126/science.1227622
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发表时间:
2013-01-04
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Huang ZJ
Huang ZJ
中科院分区:
其他
文献类型:
--
作者:
Taniguchi H;Lu J;Huang ZJ

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多种γ-氨基丁酸释放中间神经元调节皮层回路的功能组织,并有多种胚胎来源。由于难以追踪确定的细胞类型,目前尚不清楚胚胎起源在多大程度上影响了神经元间规范和皮层整合。在这里,我们跟踪了吊灯细胞(ChCs)的发育轨迹,它是支配锥体神经元轴突初始段并控制动作电位起始的最独特的中间神经元。ChCs主要来源于妊娠后期侧脑室的腹侧生发区,需要同源结构域蛋白Nkx2.1来规范。它们以固定的路线和时间表迁移,并在皮层中实现特定的层流分布。这种真正的中间神经元类型的发育规范可能有助于皮层回路基序的组装。
Diverse γ-aminobutyric acid–releasing interneurons regulate the functional organization of cortical circuits and derive from multiple embryonic sources. It remains unclear to what extent embryonic origin influences interneuron specification and cortical integration because of difficulties in tracking defined cell types. Here we followed the developmental trajectory of chandelier cells (ChCs), the most distinct interneurons that innervate the axon initial segment of pyramidal neurons and control action potential initiation. ChCs mainly derive from the ventral germinal zone of the lateral ventricle during late gestation and require the homeodomain protein Nkx2.1 for their specification. They migrate with stereotyped routes and schedule and achieve specific laminar distribution in the cortex. The developmental specification of this bona fide interneuron type likely contributes to the assembly of a cortical circuit motif.
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