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Assessment of Nogo-66 Receptor 1 Function In Vivo After Spinal Cord Injury
| Content Provider | Scilit |
|---|---|
| Author | Tong, Jing Ren, Yi Wang, Xiaowei Dimopoulos, Vassilios G. Kesler, Henry N. Liu, Weimin He, Xiaosheng Nedergaard, Maiken Huang, Jason H. |
| Copyright Year | 2014 |
| Description | Journal: Neurosurgery Neuronal Nogo-66 receptor 1 (NgR1) has attracted attention as a converging point for mediating the effects of myelin-associate inhibitory ligands in the central nervous system, establishing the growth-restrictive environment, and limiting axon regeneration after traumatic injury. To investigate the factors that may be contributing to the discrepancy in the importance of NgR1, which has been undermined by several studies that have shown the lack of substantial axon regeneration after spinal cord injury (SCI) in NgR1-knockout or -knockdown animal models. We used mice carrying either a homozygous or heterozygous null mutation in the NgR1 gene and subjected them to either a moderate or severe SCI. Locomotor function assessments revealed that the level of functional recovery is affected by the degree of injury suffered. NgR1 ablation enhanced local collateral sprouting in the mutant mice. Reactive astrocytes and chondroitin sulfate proteoglycans (CSPGs) are upregulated surrounding the injury site. Matrix metalloproteinase-9, which has been shown to degrade CSPGs, was significantly upregulated in the homozygous mutant mice compared with the heterozygous or wild-type mice. However, CSPG levels remained higher in the homozygous compared with the heterozygous mice, suggesting that CSPG-degrading activity of matrix metalloproteinase-9 may require the presence of NgR1. Genetic ablation of NgR1 may lead to significant recovery in locomotor function after SCI. The difference in locomotor recovery we observed between the groups that suffered various degrees of injury suggests that injury severity may be a confounding factor in functional recovery after SCI. |
| Related Links | http://europepmc.org/articles/pmc4062593?pdf=render https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4062593/pdf https://academic.oup.com/neurosurgery/article-pdf/75/1/51/32592333/neurosurgery-75-1-51.pdf |
| Ending Page | 60 |
| Page Count | 10 |
| Starting Page | 51 |
| ISSN | 0148396X |
| DOI | 10.1227/neu.0000000000000337 |
| Journal | Neurosurgery |
| Issue Number | 1 |
| Volume Number | 75 |
| Language | English |
| Publisher | Ovid Technologies (Wolters Kluwer Health) |
| Publisher Date | 2014-07-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Neurosurgery Nogo Receptors Spinal Cord Injury Axonal Regeneration Animal Studies |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neurology (clinical) Surgery |
