Spatiotemporal fate map of neurogenin1 (Neurog1) lineages in the mouse central nervous system.

Spatiotemporal fate map of neurogenin1 (Neurog1) lineages in the mouse central nervous system.
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DOI:
10.1002/cne.22574
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发表时间:
2011-05-01
影响因子:
2.5
通讯作者:
Johnson, Jane E.
Johnson, Jane E.
中科院分区:
医学3区
文献类型:
--
作者:
Kim, Euiseok J.;Hori, Kei;Wyckoff, Alex;Dickel, Lauren K.;Koundakjian, Edmund J.;Goodrich, Lisa V.;Johnson, Jane E.

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Neurog1 (Ngn1, Neurod3, neurogenin1)是一个基本的螺旋-环-螺旋(bHLH)转录因子,在胚胎发生过程中对神经元分化和亚型形成至关重要。由于Neurog1的短暂表达和神经元前体的广泛迁移,了解整个中枢神经系统(CNS)的Neurog1谱系细胞的完整补体一直具有挑战性。在这里,我们使用带有Neurog1- cre和Neurog1- creert2 BAC(细菌人工染色体)转基因小鼠的可诱导的Cre-flox重组系统对Neurog1谱系进行标记和跟踪。神经g1谱系细胞局限于神经元命运,并在每个脑区贡献不同但离散的种群。在前脑,神经g1谱系包括嗅球中的二尖瓣细胞和谷氨酸能中间神经元,海马中的锥体和颗粒神经元,以及皮层中的锥体细胞。此外,大部分丘脑,而不是下丘脑,起源于Neurog1祖细胞。尽管神经g1谱系主要局限于谷氨酸能神经元,但也有多种例外,包括小脑中的浦肯野细胞和其他gaba能神经元。本研究首次概述了中枢神经系统中Neurog1谱系的时空命运图。
Neurog1 (Ngn1, Neurod3, neurogenin1) is a basic helix-loop-helix (bHLH) transcription factor essential for neuronal differentiation and subtype specification during embryogenesis. Due to the transient expression of Neurog1 and extensive migration of neuronal precursors, it has been challenging to understand the full complement of Neurog1 lineage cells throughout the central nervous system (CNS). Here we labeled and followed Neurog1 lineages using inducible Cre-flox recombination systems with Neurog1-Cre and Neurog1-CreERT2 BAC (bacterial artificial chromosome) transgenic mice. Neurog1 lineage cells are restricted to neuronal fates and contribute to diverse but discrete populations in each brain region. In the forebrain, Neurog1 lineages include mitral cells and glutamatergic interneurons in the olfactory bulb, pyramidal and granule neurons in the hippocampus, and pyramidal cells in the cortex. In addition, most of the thalamus, but not the hypothalamus, arises from Neurog1 progenitors. Although Neurog1 lineages are largely restricted to glutamatergic neurons, there are multiple exceptions including Purkinje cells and other GABAergic neurons in the cerebellum. This study provides the first overview of the spatiotemporal fate map of Neurog1 lineages in the CNS.
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