Cited by 320Nerve injury and regenerationSpinal Cord Injury ResearchProteoglycans and glycosaminoglycans research

Chondroitinase ABC Digestion of the Perineuronal Net Promotes Functional Collateral Sprouting in the Cuneate Nucleus after Cervical Spinal Cord Injury

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Massey, James M., Hubscher, Charles H., Wagoner, Michelle R., Decker, Julie A., Amps, Jeremy, Silver, Jerry, Onifer, Stephen M.·2006·The Journal of Neuroscience

Abstract

Upregulation of extracellular chondroitin sulfate proteoglycans (CSPGs) after CNS injuries contributes to the impediment of functional recovery by restricting both axonal regeneration and synaptic plasticity. In the present study, the effect of degrading CSPGs with the application of the bacterial enzyme chondroitinase ABC (chABC) into the cuneate nucleus of rats partially denervated of forepaw dorsal column axons was examined. A dorsal column transection between the C6–C7 dorsal root entry zones was followed immediately by an ipsilateral brainstem injection of either chABC or a bacterial-derived control enzyme [penicillinase (P-ase)] and then subsequently (1 week later) followed with a second brainstem enzyme injection and cholera toxin B subunit (CTB) tracer injection into the ipsilateral forepaw digits and pads. After 1 additional week, the rats underwent electrophysiological receptive field mapping of the cuneate nucleus and/or anatomical evaluation. Examination of the brainstems of rats from each group revealed that CSPGs had been reduced after chABC treatment. Importantly, in the chABC-treated rats (but not in the P-ase controls), a significantly greater area of the cuneate nucleus was occupied by physiologically active CTB traced forepaw afferents that had been spared by the initial cord lesion. These results demonstrate, for the first time, a functional change directly linked to anatomical evidence of sprouting by spinal cord afferents after chABC treatment.

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Authors
Massey, J. M., Hubscher, C. H., Wagoner, M. R., Decker, J. A., Amps, J., Silver, J., & Onifer, S. M.
Affiliations
  • University of Louisville (US)
  • University of Kentucky (US)
Venue
The Journal of Neuroscience
Published
2006-04-19
Volume
26
Issue
16
Pages
4406-4414
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1966007526
Cited by
320
References
56
Citations by year
2026: 9 · 2025: 6 · 2024: 6 · 2023: 9 · 2022: 11 · 2021: 9 · 2020: 17 · 2019: 14 · 2018: 21 · 2017: 13 · 2016: 16 · 2015: 16 · 2014: 29 · 2013: 19 · 2012: 27
FWCI
8.08
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (9874764)
  • Yale University
  • University of Louisville
  • National Institutes of Health
  • U.S. Public Health Service (25713)
  • National Institute of Neurological Disorders and Stroke (NS-40411, R01NS040411)
  • National Center for Research Resources (RR-15576, P20RR015576)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nerve injury and regeneration
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Spinal Cord Injury Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Proteoglycans and glycosaminoglycans research
Keywords
chondroitinase ABC, perineuronal nets, chondroitin sulfate proteoglycans, cervical spinal cord injury, cuneate nucleus, collateral sprouting, axon regeneration, penicillinase, receptive field mapping
MeSH terms
Afferent Pathways, Animals, Cervical Vertebrae, Male, Nerve Net, Nerve Regeneration, Neuronal Plasticity, Peripheral Nerves, Pilot Projects, Chondroitin Sulfate Proteoglycans, Spinal Cord Injuries, Rats, Sprague-Dawley, Chondroitin ABC Lyase, Rats

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