DOI: 10.1073/pnas.052308899. Survival and regeneration of rubrospinal neurons 1 year after spinal cord injury

Survival and regeneration of rubrospinal neurons 1 year after spinal cord injury

10.1073/pnas.052308899

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

Scientific interest to find a treatment for spinal cord injuries has led to the development of numerous experimental strategies to promote axonal regeneration across the spinal cord injury site. Although these strategies have been developed in acute injury paradigms and hold promise for individuals with spinal cord injuries in the future, little is known about their applicability for the vast majority of paralyzed individuals whose injury occurred long ago and who are considered to have a chronic injury. Some studies have shown that the effectiveness of these approaches diminishes dramatically within weeks after injury. Here we investigated the regenerative capacity of rat rubrospinal neurons whose axons were cut in the cervical spinal cord 1 year before. Contrary to earlier reports, we found that rubrospinal neurons do not die after axotomy but, rather, they undergo massive atrophy that can be reversed by applying brain-derived neurotrophic factor to the cell bodies in the midbrain. This administration of neurotrophic factor to the cell body resulted in increased expression of growth-associated protein-43 and Tα1 tubulin, genes thought to be related to axonal regeneration. This treatment promoted the regeneration of these chronically injured rubrospinal axons into peripheral nerve transplants engrafted at the spinal cord injury site. This outcome is a demonstration of the regenerative capacity of spinal cord projection neurons a full year after axotomy.

Bibliography

Kwon, B. K., Liu, J., Messerer, C., Kobayashi, N. R., McGraw, J., Oschipok, L., & Tetzlaff, W. (2002). Survival and regeneration of rubrospinal neurons 1 year after spinal cord injury. Proceedings of the National Academy of Sciences, 99(5), 3246â3251.

Authors 7

Brian K. Kwon (first)
Jie Liu (additional)
Corrie Messerer (additional)
Nao R. Kobayashi (additional)
John McGraw (additional)
Loren Oschipok (additional)
Wolfram Tetzlaff (additional)

References 35 Referenced 201

10.1038/sj.sc.3101055
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C A Tobias, M Shibata, J S Shumsky, M H Tuszynski, I Fischer, A Tessler, M Murray Soc Neurosci Abstr 369, 8 (2001). / Soc Neurosci Abstr by Tobias C A (2001)
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F M Ausubel, R Brent, R E Kingston, D D Moore, J G Seidman, K A Smith, K Struhl Current Protocols in Molecular Biology (Wiley, New York, 1987). / Current Protocols in Molecular Biology by Ausubel F M (1987)
10.1111/j.1460-9568.1996.tb01284.x
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10.1016/0306-4522(83)90150-1

Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 10:37 a.m.)
Deposited	3 years, 4 months ago (April 12, 2022, 2:46 p.m.)
Indexed	1 week, 1 day ago (Aug. 29, 2025, 6:05 a.m.)
Issued	23 years, 6 months ago (Feb. 26, 2002)
Published	23 years, 6 months ago (Feb. 26, 2002)
Published Online	23 years, 6 months ago (Feb. 26, 2002)
Published Print	23 years, 6 months ago (March 5, 2002)

Funders 0

None

BibTeX

@article{Kwon_2002, title={Survival and regeneration of rubrospinal neurons 1 year after spinal cord injury}, volume={99}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.052308899}, DOI={10.1073/pnas.052308899}, number={5}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Kwon, Brian K. and Liu, Jie and Messerer, Corrie and Kobayashi, Nao R. and McGraw, John and Oschipok, Loren and Tetzlaff, Wolfram}, year={2002}, month=feb, pages={3246–3251} }

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