Oligodendrocytes can be generated from the local ventricular and subventricular zones of embryonic chicken midbrain.
It is well established that early oligodendrocyte progenitors (OLPs) are induced by Sonic hedgehog (Shh) from the ventral ventricular zone throughout the entire neural axis. Here, we report that OLP cells can also be generated from the dorsal ventricular and subventricular zone in embryonic chicken midbrain at later stages. Concomitantly, a low level of Shh expression is detected in the adjacent ventricular and subventricular zones, implying that oligodendrogenesis in the dorsal midbrain is also regulated by Shh. In addition, Nkx2.2 and Olig2 are co-expressed in the same OLPs generated from the dorsal midbrain, suggesting that the dorsal oligodendrogenesis is similarly under the dual control of these two transcription factors as in the developing spinal cord.
Fu
Hui
H
Department of Anatomical Sciences and Neurobiology, School of Medicine, University of Louisville, Louisville, KY 40292, USA.
Cai
Jun
J
Rutledge
Morgan
M
Hu
Xuemei
X
Qiu
Mengsheng
M
D000818:Animals; D051792:Basic Helix-Loop-Helix Proteins; D002454:Cell Differentiation; D019070:Cell Lineage; D002552:Cerebral Ventricles / Q000166:cytology; D002642:Chick Embryo; D018507:Gene Expression Regulation, Developmental; D053823:Hedgehog Proteins; D000090322:Homeobox Protein Nkx-2.2; D018398:Homeodomain Proteins / Q000096:biosynthesis / Q000235:genetics; D017403:In Situ Hybridization; D008636:Mesencephalon / Q000166:cytology / Q000196:embryology*; D009419:Nerve Tissue Proteins / Q000096:biosynthesis / Q000235:genetics; D009687:Nuclear Proteins; D009836:Oligodendroglia / Q000166:cytology* / Q000378:metabolism; D013234:Stem Cells / Q000166:cytology* / Q000378:metabolism; D015534:Trans-Activators / Q000096:biosynthesis / Q000235:genetics; D014157:Transcription Factors / Q000096:biosynthesis / Q000235:genetics; D029961:Zebrafish Proteins
D051792:Basic Helix-Loop-Helix Proteins; D053823:Hedgehog Proteins; D000090322:Homeobox Protein Nkx-2.2; D018398:Homeodomain Proteins; D009419:Nerve Tissue Proteins; D009687:Nuclear Proteins; D015534:Trans-Activators; D014157:Transcription Factors; D029961:Zebrafish Proteins; C000715631:NKX2-2 protein, human; C509239:SHH protein, human; C000715630:nkx2.2b protein, zebrafish