The Birth of the Eye Vesicle: When Fate Decision Equals Morphogenesis.

The Birth of the Eye Vesicle: When Fate Decision Equals Morphogenesis.
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DOI:
10.3389/fnins.2018.00087
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发表时间:
2018
影响因子:
4.3
通讯作者:
Houart C
Houart C
中科院分区:
医学2区
文献类型:
--
作者:
Giger FA;Houart C

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当胚胎外胚层被诱导形成神经板时,该上皮内的细胞获得限制性身份,这将决定它们的行为和进行性分化。大多数神经板细胞采取的第一个行为被称为神经形成,这是一种将神经上皮细胞塑造成管状的形态发生运动。有一个细胞群没有采用这种运动:眼睛区域。因此,将眼睛身份赋予神经板内的特定群体是一个关键的神经命运决定。当所有其他神经群经历类似的神经形成时,向中线会聚,眼区向外移动,远离形成神经管的其余部分,形成囊泡。因此,虽然大多数其他命运的获得延迟不会产生显著的形态发生后果,但眼野建立中的缺陷会显著影响眼睛的形成。然而,很少有人知道驱动它们的分子和细胞机制。在这里,我们总结了什么是已知的脊椎动物物种,并提出了一个模型,强调什么是需要形成的基本囊泡,启动脊椎动物的眼睛。
As the embryonic ectoderm is induced to form the neural plate, cells inside this epithelium acquire restricted identities that will dictate their behavior and progressive differentiation. The first behavior adopted by most neural plate cells is called neurulation, a morphogenetic movement shaping the neuroepithelium into a tube. One cell population is not adopting this movement: the eye field. Giving eye identity to a defined population inside the neural plate is therefore a key neural fate decision. While all other neural population undergo neurulation similarly, converging toward the midline, the eye field moves outwards, away from the rest of the forming neural tube, to form vesicles. Thus, while delay in acquisition of most other fates would not have significant morphogenetic consequences, defect in the establishment of the eye field would dramatically impact the formation of the eye. Yet, very little is understood of the molecular and cellular mechanisms driving them. Here, we summarize what is known across vertebrate species and propose a model highlighting what is required to form the essential vesicles that initiate the vertebrate eyes.
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