Olig1 function is required for oligodendrocyte differentiation in the mouse brain

Oligodendrocyte differentiation and myelination are tightly regulated processes orchestrated by a complex transcriptional network. Two bHLH transcription factors in this network, Olig1 and Olig2, are expressed exclusively by oligodendrocytes after late embryonic development. Although the role of Oli...

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Veröffentlicht in:The Journal of neuroscience 2015-03, Vol.35 (10), p.4386-4402
Hauptverfasser: Dai, Jinxiang, Bercury, Kathryn K, Ahrendsen, Jared T, Macklin, Wendy B
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container_issue 10
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container_title The Journal of neuroscience
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creator Dai, Jinxiang
Bercury, Kathryn K
Ahrendsen, Jared T
Macklin, Wendy B
description Oligodendrocyte differentiation and myelination are tightly regulated processes orchestrated by a complex transcriptional network. Two bHLH transcription factors in this network, Olig1 and Olig2, are expressed exclusively by oligodendrocytes after late embryonic development. Although the role of Olig2 in the lineage is well established, the role of Olig1 is still unclear. The current studies analyzed the function of Olig1 in oligodendrocyte differentiation and developmental myelination in brain. Both oligodendrocyte progenitor cell commitment and oligodendrocyte differentiation were impaired in the corpus callosum of Olig1-null mice, resulting in hypomyelination throughout adulthood in the brain. As seen in previous studies with this mouse line, although there was an early myelination deficit in the spinal cord, essentially full recovery with normal spinal cord myelination was seen. Intriguingly, this regional difference may be partially attributed to compensatory upregulation of Olig2 protein expression in the spinal cord after Olig1 deletion, which is not seen in brain. The current study demonstrates a unique role for Olig1 in promoting oligodendrocyte progenitor cell commitment, differentiation, and subsequent myelination primarily in brain, but not spinal cord.
doi_str_mv 10.1523/JNEUROSCI.4962-14.2015
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subjects 2',3'-Cyclic-Nucleotide Phosphodiesterases - metabolism
Age Factors
Animals
Animals, Newborn
Basic Helix-Loop-Helix Transcription Factors - genetics
Basic Helix-Loop-Helix Transcription Factors - metabolism
Brain - cytology
Brain - ultrastructure
Cell Death - genetics
Cell Differentiation - genetics
Cell Differentiation - physiology
Cells, Cultured
Gene Expression Regulation, Developmental - genetics
In Vitro Techniques
Mice
Mice, Inbred C57BL
Mice, Transgenic
Mutation - genetics
Myelin Basic Protein - metabolism
Myelin Proteolipid Protein - metabolism
Myelin-Oligodendrocyte Glycoprotein - metabolism
Oligodendroglia - physiology
Oligodendroglia - ultrastructure
SOXB1 Transcription Factors - metabolism
Spinal Cord - cytology
Stem Cells - physiology
title Olig1 function is required for oligodendrocyte differentiation in the mouse brain
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