Early Forebrain Neurons and Scaffold Fibers in Human Embryos.

Early Forebrain Neurons and Scaffold Fibers in Human Embryos.
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人类胚胎中的早期前脑神经元和支架纤维

DOI:
10.1093/cercor/bhz136
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发表时间:
2020-03
期刊:
影响因子:
3.7
通讯作者:
Zhou Libing
Zhou Libing
中科院分区:
医学2区
文献类型:
--
作者:
Qin Jingwen;Wang Meizhi;Zhao Tianyun;Xiao Xue;Li Xuejun;Yang Jieping;Yi Lisha;Goffinet Andre M;Qu Yibo;Zhou Libing

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神经祖细胞增殖、神经元迁移、区域组织和先驱轴突连接是早期前脑发育过程中的关键事件,但仍不完全清楚,尤其是在人类中。在这里,我们研究了受孕后 5 至 8 周 (WPC5-8) 的人类胚胎的前脑发育,这些阶段对应于神经上皮/早期边缘区 (WPC5)、端脑前板 (WPC6 和 7) 和初期皮质板 (WPC8)。我们发现早期端脑神经元是在神经上皮阶段形成的;最早熟的神经上皮起源于局部端脑神经上皮,也可能起源于嗅板。在板前阶段,人类和小鼠的前脑组织在区域组织和 Cajal-Retzius 细胞、先锋神经元和轴突的分化方面非常相似。与小鼠一样,来自前丘脑、腹侧端脑和皮质前板的先驱神经元的轴突穿过间脑-端脑交界处和大脑皮层-大脑皮层下边界,形成可以在后期引导丘脑和皮质轴突的支架。根据该模型,在早期皮质板阶段,离皮质轴突在​​腹侧端脑中运行,与支架神经元密切接触,支架神经元表达 CELSR3 和 FZD3,这两种分子调节小鼠中类似支架的形成。
Neural progenitor proliferation, neuronal migration, areal organization, and pioneer axon wiring are critical events during early forebrain development, yet remain incompletely understood, especially in human. Here, we studied forebrain development in human embryos aged 5 to 8 postconceptional weeks (WPC5-8), stages that correspond to the neuroepithelium/early marginal zone (WPC5), telencephalic preplate (WPC6 & 7), and incipient cortical plate (WPC8). We show that early telencephalic neurons are formed at the neuroepithelial stage; the most precocious ones originate from local telencephalic neuroepithelium and possibly from the olfactory placode. At the preplate stage, forebrain organization is quite similar in human and mouse in terms of areal organization and of differentiation of Cajal-Retzius cells, pioneer neurons, and axons. Like in mice, axons from pioneer neurons in prethalamus, ventral telencephalon, and cortical preplate cross the diencephalon-telencephalon junction and the pallial-subpallial boundary, forming scaffolds that could guide thalamic and cortical axons at later stages. In accord with this model, at the early cortical plate stage, corticofugal axons run in ventral telencephalon in close contact with scaffold neurons, which express CELSR3 and FZD3, two molecules that regulates formation of similar scaffolds in mice.
DOI: 10.1111/j.1460-9568.2012.08119.x
发表时间: 2012-05
期刊: The European journal of neuroscience
影响因子: --
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