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Open Access Highly Accessed Research article

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

Todd E Anthony1* and Nathaniel Heintz12

Author Affiliations

1 Laboratory of Molecular Biology, the Rockefeller University, 1230 York Avenue, New York, New York 10021, USA

2 Howard Hughes Medical Institute, the Rockefeller University, 1230 York Avenue, New York, New York 10021, USA

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Neural Development 2008, 3:30  doi:10.1186/1749-8104-3-30

Published: 5 November 2008

Abstract

Background

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.

Results

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.

Conclusion

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.