Genetic lineage tracing defines distinct neurogenic and gliogenic stages of ventral telencephalic radial glial development.

Genetic lineage tracing defines distinct neurogenic and gliogenic stages of ventral telencephalic radial glial development.
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DOI:
10.1186/1749-8104-3-30
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发表时间:
2008-11-05
期刊:
影响因子:
3.6
通讯作者:
Heintz N
Heintz N
中科院分区:
生物学3区
文献类型:
--
作者:
Anthony TE;Heintz N

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放射状神经胶质细胞包括一个分子定义的神经祖细胞群体,但它们在神经发生中的作用仍然存在争议,因为缺乏一个普遍接受的遗传工具来追踪它们的后代和无法区分功能不同的发育阶段。通过使用三种不同的放射状胶质细胞启动子(Blbp,Glast和hGFAP)获得的Cre/loxP谱系追踪结果的直接比较,我们表明,大脑中的大多数神经元来自放射状胶质细胞。此外,我们发现,hGFAP启动子诱导发生在腹侧端脑放射状胶质细胞后,他们基本上完成了神经发生。这些数据确立了放射状神经胶质在发育中的中枢神经系统中的主要神经源性作用,并在遗传上区分了腹侧端脑中早期神经源性Blbp + Glast + hGFAP-阶段与晚期神经胶质源性Blbp+Glast+hGFAP+阶段。
Radial glia comprise a molecularly defined neural progenitor population but their role in neurogenesis has remained contested due to the lack of a single universally accepted genetic tool for tracing their progeny and the inability to distinguish functionally distinct developmental stages. By direct comparisons of Cre/loxP lineage tracing results obtained using three different radial glial promoters (Blbp, Glast, and hGFAP), we show that most neurons in the brain are derived from radial glia. Further, we show that hGFAP promoter induction occurs in ventral telencephalic radial glia only after they have largely completed neurogenesis. These data establish the major neurogenic role of radial glia in the developing central nervous system and genetically distinguish an early neurogenic Blbp+Glast+hGFAP- stage from a later gliogenic Blbp+Glast+hGFAP+ stage in the ventral telencephalon.
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