Lesion-induced differential expression and cell association of Neurocan, Brevican, Versican V1 and V2 in the mouse dorsal root entry zone

Détails

ID Serval
serval:BIB_1D7111470516
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Lesion-induced differential expression and cell association of Neurocan, Brevican, Versican V1 and V2 in the mouse dorsal root entry zone
Périodique
Neuroscience
Auteur(s)
Beggah  A. T., Dours-Zimmermann  M. T., Barras  F. M., Brosius  A., Zimmermann  D. R., Zurn  A. D.
ISSN
0306-4522 (Print)
Statut éditorial
Publié
Date de publication
2005
Volume
133
Numéro
3
Pages
749-62
Notes
Journal Article
Research Support, Non-U.S. Gov't
Résumé
Lack of regeneration in the CNS has been attributed to many causes, including the presence of inhibitory molecules such as chondroitin sulfate proteoglycans (CSPGs). However, little is known about the contribution of CSPGs to regeneration failure in vivo, in particular at the dorsal root entry zone (DREZ), a unique CNS region that blocks regeneration of sensory fibers following dorsal root injury without glial scar formation. The goal of the present study was to evaluate the presence, regulation, and cellular identity of the proteoglycans Brevican, Neurocan, Versican V1 and Versican V2 in the DREZ using CSPG-specific antibodies and nucleic acid probes. Brevican and Versican V2 synthesized before the lesion were still present at high levels in the extracellular matrix of the DREZ several weeks after injury. In addition, Brevican was transiently expressed by reactive oligodendrocytes, and by a subset of astrocytes thereafter. Versican V2 mRNA appeared in NG2-positive cells with the morphology of oligodendrocyte precursor cells. Neurocan and Versican V1 levels were low before injury, and appeared in nestin-positive astrocytes and in NG2-positive cells, respectively, following lesion. Versican V1, but not V2, was also transiently increased in the peripheral dorsal root post-lesion. This is the first thorough description of the expression and cell association of individual proteoglycans following dorsal root lesion. It demonstrates that the proteoglycans Brevican, Neurocan, Versican V1, and Versican V2 are abundant in the DREZ at the time regenerating sensory fibers reach the PNS/CNS border and may therefore participate in growth-inhibition in this region.
Mots-clé
Animals Astrocytes/physiology Cervical Vertebrae Gene Expression Isomerism Lectins, C-Type Mice Mice, Inbred C57BL Nerve Regeneration/*physiology Nerve Tissue Proteins/*genetics/metabolism Neurons, Afferent/cytology/physiology Proteochondroitin Sulfates/chemistry/*genetics/metabolism RNA, Messenger/analysis Rhizotomy Spinal Cord/physiology Spinal Nerve Roots/cytology/*physiology Versicans
Pubmed
Web of science
Création de la notice
28/01/2008 9:44
Dernière modification de la notice
03/03/2018 14:34
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