Region-specific and stage-dependent regulation of Olig gene expression and oligodendrogenesis by Nkx6.1 homeodomain transcription factor

Item Type:	Article
Title:	Region-specific and stage-dependent regulation of Olig gene expression and oligodendrogenesis by Nkx6.1 homeodomain transcription factor
Creators Name:	Liu, R. and Cai, J. and Hu, X. and Tan, M. and Qi, Y. and German, M. and Rubenstein, J. and Sander, M. and Qiu, M.
Abstract:	During early neural development, the Nkx6.1 homeodomain neural progenitor gene is specifically expressed in the ventral neural tube, and its activity is required for motoneuron generation in the spinal cord. We report that Nkx6.1 also controls oligodendrocyte development in the developing spinal cord, possibly by regulating Olig gene expression in the ventral neuroepithelium. In Nkx6.1 mutant spinal cords, expression of Olig2 in the motoneuron progenitor domain is diminished, and the generation and differentiation of oligodendrocytes are significantly delayed and reduced. The regulation of Olig gene expression by Nkx6.1 is stage dependent, as ectopic expression of Nkx6.1 in embryonic chicken spinal cord results in an induction of Olig2 expression at early stages, but an inhibition at later stages. Moreover, the regulation of Olig gene expression and oligodendrogenesis by Nkx6.1 also appears to be region specific. In the hindbrain, unlike in the spinal cord, Olig1 and Olig2 can be expressed both inside and outside the Nkx6.1-expressing domains and oligodendrogenesis in this region is not dependent on Nkx6.1 activity.
Keywords:	Oligodendrocyte Development, Nkx6.1 Mutation, In Ovo, Electroporation, Spinal Cord, Olig2, Nkx2.2, Animals, Mice
Source:	Development
ISSN:	0950-1991
Publisher:	Company of Biologists
Volume:	130
Number:	25
Page Range:	6221-31
Date:	December 2003
Official Publication:	https://doi.org/10.1242/dev.00868
PubMed:	View item in PubMed

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