Integrated Patterning Programs During Drosophila Development Generate the Diversity of Neurons and Control Their Mature Properties.

Integrated Patterning Programs During Drosophila Development Generate the Diversity of Neurons and Control Their Mature Properties.
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DOI:
10.1146/annurev-neuro-102120-014813
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发表时间:
2021-07-08
影响因子:
13.9
通讯作者:
Desplan C
Desplan C
中科院分区:
医学1区
文献类型:
--
作者:
Rossi AM;Jafari S;Desplan C

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在果蝇神经发生的约5天期间(胚胎发育晚期到化蛹初期),数量有限的神经干细胞产生约20万个神经元,包含数百种细胞类型。为了构建一个功能性的神经系统,神经元类型需要在正确的位置、合适的数量以及恰当的时间产生。我们讨论神经干细胞(成神经细胞)如何获取其在神经系统中位置的“区域代码”(空间模式形成)以及它们如何把握时间顺序产生具有独特命运的神经元(时间模式形成)。我们聚焦于一些具体的例子,这些例子展示了一个相对简单的模式形成系统(Notch)如何被反复使用以产生不同的神经元类型。我们还推测在短时间段和长时间段起作用的不同时间模式形成模式可能是如何关联的。最后我们讨论特化程序是如何整合并导致不同神经元类型的终端特征的。
During ~5 days of Drosophila neurogenesis (late embryogenesis to the beginning of pupation), a limited number of neural stem cells produce ~200,000 neurons comprising hundreds of cell types. To build a functional nervous system, neuronal types need to be produced in the proper place, appropriate number, and correct time. We discuss how neural stem cells (neuroblasts) obtain “area codes” for their positions in the nervous system (spatial patterning) and how they keep time to sequentially produce neurons with unique fates (temporal patterning). We focus on specific examples that demonstrate how a relatively simple patterning system (Notch) can be used reiteratively to generate different neuronal types. We also speculate how different modes of temporal patterning operating over short time periods versus long time periods might be linked. We end by discussing how specification programs are integrated and lead to the terminal features of different neuronal types.
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