Cranial neural crest cells form corridors prefiguring sensory neuroblast migration.

Cranial neural crest cells form corridors prefiguring sensory neuroblast migration.
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DOI:
10.1242/dev.091033
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发表时间:
2013-09
期刊:
Development (Cambridge, England)
影响因子:
--
通讯作者:
Begbie J
Begbie J
中科院分区:
其他
文献类型:
--
作者:
Freter S;Fleenor SJ;Freter R;Liu KJ;Begbie J

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大多数颅感觉神经元起源于表面外胚层的基板,迁移形成连接到中枢神经系统(CNS)的神经节。向内迁移的感觉神经母细胞和迁移的颅神经嵴细胞(NCC)之间的相互作用在协调这一过程中发挥作用,但这两个细胞群之间的关系是如何建立的尚不清楚。在这里,我们证明了NCC产生的走廊描绘的路径之间的基板和中枢神经系统的鸡和小鼠的迁移神经母细胞。体外分析表明,NCC是不是必不可少的神经母细胞迁移,但作为一个上级基板中胚层,建议提供一个走廊,通过一个不太允许的中胚层领土。NCC走廊的早期组织发生在感觉神经发生之前,可以在体外重演;然而,NCC延伸到基板需要基板神经发生,表现出相互作用。总之,我们的数据表明,NCC走廊施加精确的神经节形成和连接到CNS的物理组织,提供了一个局部环境,以封闭迁移的成神经细胞和轴突过程,因为它们通过非神经领土迁移。
The majority of cranial sensory neurons originate in placodes in the surface ectoderm, migrating to form ganglia that connect to the central nervous system (CNS). Interactions between inward-migrating sensory neuroblasts and emigrant cranial neural crest cells (NCCs) play a role in coordinating this process, but how the relationship between these two cell populations is established is not clear. Here, we demonstrate that NCCs generate corridors delineating the path of migratory neuroblasts between the placode and CNS in both chick and mouse. In vitro analysis shows that NCCs are not essential for neuroblast migration, yet act as a superior substrate to mesoderm, suggesting provision of a corridor through a less-permissive mesodermal territory. Early organisation of NCC corridors occurs prior to sensory neurogenesis and can be recapitulated in vitro; however, NCC extension to the placode requires placodal neurogenesis, demonstrating reciprocal interactions. Together, our data indicate that NCC corridors impose physical organisation for precise ganglion formation and connection to the CNS, providing a local environment to enclose migrating neuroblasts and axonal processes as they migrate through a non-neural territory.
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