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. 2004 Jun;24(3):357–366. doi: 10.1023/B:CEMN.0000022768.34389.4e

Hoxb4 in Oligodendrogenesis

Danette J Nicolay 1, J Ronald Doucette 2,3, Adil J Nazarali 1,3
PMCID: PMC11529910  PMID: 15206819

Abstract

1. Although recent advances have provided insight into the transcriptional control of oligodendrocyte (OG) development, little information exists on the role of clustered Hox genes in this process. The aim of this study was to examine the expression profile of Hoxb4 in the oligodendroglial lineage.

2. Immunocytochemical analysis of primary mixed glial cultures demonstrated that Hoxb4 was expressed throughout OG development, being coexpressed with oligodendroglial markers, A2B5, O4 (97%), GalC (91%), and MBP (93%).

3. Immunohistochemical analysis of transverse spinal cord sections demonstrated diffuse expression of Hoxb4 throughout the spinal cord at E12.5 (C16/T19), after which expression was confined primarily to the presumptive gray matter.

4. At E14.25 (C19+/T21), Olig2+ cells had begun to migrate out from the ventral ventricular zone into the presumptive gray matter. These results suggest that Olig2+ cells could coexpress Hoxb4 since it is expressed throughout this region.

5. The expression of Hoxb4 by cells of the OG lineage indicates that it could play a role in OG maturation.

Keywords: oligodendrocyte development, Hoxb4, Olig2, primary glial cultures, spinal cord

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