A Unique Class of Neural Progenitors in the Drosophila Optic Lobe Generates Both Migrating Neurons and Glia.

A Unique Class of Neural Progenitors in the Drosophila Optic Lobe Generates Both Migrating Neurons and Glia.
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DOI:
10.1016/j.celrep.2016.03.061
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发表时间:
2016-04-26
期刊:
影响因子:
8.8
通讯作者:
Desplan C
Desplan C
中科院分区:
生物学1区
文献类型:
--
作者:
Chen Z;Del Valle Rodriguez A;Li X;Erclik T;Fernandes VM;Desplan C

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神经前体细胞如何分化为神经元和神经胶质细胞是发育神经生物学家面临的一个重要问题。我们在果蝇视叶(由神经节层、髓质和小叶复合体组成)中研究这个问题。我们发现,在未来神经节层后方的两个神经胶质生成区域也会产生神经节层广域(Lawf)神经元,这些神经元与神经节层神经胶质细胞拥有共同的祖细胞。这些祖细胞既不表达典型的神经母细胞标志物,也不表达神经节层前体细胞标志物。它们响应Notch信号分为两个亚谱系,分别产生神经节层神经胶质细胞或Lawf神经元。新生的神经胶质细胞和Lawf神经元然后沿切线方向迁移相当长的距离以到达它们的目标组织。因此,Lawf神经元发生(包括与神经胶质细胞有共同起源以及神经元迁移)类似于脊椎动物神经元发生的几个方面。
How neuronal and glial fates are specified from neural precursor cells is an important question for developmental neurobiologists. We address this question in the Drosophila optic lobe, composed of the lamina, medulla, and lobula complex. We show that two gliogenic regions posterior to the prospective lamina also produce lamina wide-field (Lawf) neurons, which share common progenitors with lamina glia. These progenitors express neither canonical neuroblast nor lamina precursor cell markers. They bifurcate into two sub-lineages in response to Notch signaling, generating lamina glia or Lawf neurons, respectively. The newly born glia and Lawfs then migrate tangentially over substantial distances to reach their target tissue. Thus, Lawf neurogenesis, which includes a common origin with glia, as well as neuronal migration, resembles several aspects of vertebrate neurogenesis.
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