Temporospatial Expression and Cellular Localization of Oligodendrocyte Myelin Glycoprotein (OMgp) after Traumatic Spinal Cord Injury in Adult Rats
- 1 December 2009
- journal article
- research article
- Published by Mary Ann Liebert Inc in Journal of Neurotrauma
- Vol. 26 (12), 2299-2311
- https://doi.org/10.1089/neu.2009.0954
Abstract
Traumatic spinal cord injury (SCI) leads to permanent neurological deficits, which, in part, is due to the inability of mature axons to regenerate in the mammalian central nervous system (CNS). The oligodendrocyte myelin glycoprotein (OMgp) is one of the myelin-associated inhibitors of neurite outgrowth in the CNS. To date, limited information is available concerning its expression following SCI, possibly due to the lack of a reliable antibody against it. Here we report the generation of a highly specific OMgp polyclonal antibody from the rabbit. Using this antibody, we found that OMgp was almost exclusively expressed in the CNS. Following a moderately contusive SCI using a New York University impactor (10 g rod dropped from a height of 12.5 mm), both OMgp mRNA and protein levels were elevated at 1 and 7 days post-SCI, respectively, and peaked at 28 days compared to those of the sham-operated controls. Spatially, OMgp was expressed throughout the entire rostrocaudal extension of a 10 mm long spinal segment with the highest expression seen at the injury epicenter. OMgp was exclusively localized in neurons and oligodendrocytes in the normal and sham-operated controls with an increased expression found in these cells following SCI. OMgp was not expressed in astrocytes or microglia in all groups. Thus, our study has provided evidence for temporospatial expression and cellular localization of OMgp following SCI and suggested that this molecule may contribute to the overall inhibition of axonal regeneration.Keywords
This publication has 59 references indexed in Scilit:
- Reduction of oligodendrocyte myelin glycoprotein expression following facial nerve transectionJournal of Chemical Neuroanatomy, 2008
- PirB, a Second Receptor for the Myelin Inhibitors of Axonal Regeneration Nogo66, MAG, and OMgp: Implications for Regeneration In VivoNeuron, 2008
- PirB is a Functional Receptor for Myelin Inhibitors of Axonal RegenerationScience, 2008
- Assessment of functional recovery and axonal sprouting in oligodendrocyte-myelin glycoprotein (OMgp) null mice after spinal cord injuryMolecular and Cellular Neuroscience, 2008
- Expression of oligodendrocyte myelin glycoprotein and its receptor NgR after the injury of rat central nervous systemNeuroscience Letters, 2007
- Glial inhibition of CNS axon regenerationNature Reviews Neuroscience, 2006
- Ephrin-B3 is a myelin-based inhibitor of neurite outgrowthProceedings of the National Academy of Sciences of the United States of America, 2005
- Myelin-associated inhibitors of axonal regeneration in the adult mammalian CNSNature Reviews Neuroscience, 2003
- Identification of a receptor mediating Nogo-66 inhibition of axonal regenerationNature, 2001
- Glucocorticoid Receptor Expression in the Spinal Cord after Traumatic Injury in Adult RatsJournal of Neuroscience, 1999