Cited by 104Proteoglycans and glycosaminoglycans researchNeuroinflammation and Neurodegeneration MechanismsNeurological Disorders and Treatments

Decomposition and long-lasting downregulation of extracellular matrix in perineuronal nets induced by focal cerebral ischemia in rats.

Hobohm, Carsten, Günther, Albrecht, Grosche, Jens, Roßner, Steffen, Schneider, Dietmar, Brückner, Gert·2005·Journal of Neuroscience Research

Abstract

The upregulation of extracellular matrix components, especially chondroitin sulfate proteoglycans, after brain injury and stroke is known to accompany the glial reaction, forming repellent scars that hinder axonal growth and the reorganization of the injured neuronal networks. The extracellular matrix associated with perineuronal nets (PNs) in the primarily injured and remote regions has not yet been systematically analyzed. We use the model of permanent middle cerebral artery occlusion (MCAO) to investigate the acute and long‐lasting consequences of ischemia for PNs, related to the damage of neurons and reactions of glial cells, in spontaneously hypertensive rats. Extracellular matrix components associated with PNs around cortical interneurons and neurons in thalamic nuclei were characterized 1, 7, 14, and 35 days after MCAO, using Wisteria floribunda agglutinin (WFA) staining and immunocytochemistry. The degradation of PNs in the infarct core was initiated by loss of WFA‐binding matrix components, indicating the cleavage of glycosaminoglycan chains of chondroitin sulfate proteoglycans. Immunostaining showed the subsequent removal of proteoglycan core proteins within the extending microglia/macrophage invasion zone lasting for 2 weeks after MCAO. In the cortical periinfarct region, delineated by an astrocytic scar against the infarct core, the number of WFA‐stained and proteoglycan core protein‐immunoreactive PNs was permanently reduced. In the homolateral ventroposterior thalamus, the delayed decrease in perineuronal matrix was related to the distribution pattern of activated microglia and massive neuronal degeneration. It can be concluded from these results that complementary to the known upregulation of matrix components in the glial scar, deficits in the expression of the neuron‐associated extracellular matrix develop in the periinfarct and remote regions. These deficits may contribute to the long‐lasting functional impairments after stroke. © 2005 Wiley‐Liss, Inc.

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Crossref · 10.1002/jnr.20459

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Authors
Hobohm, C., Günther, A., Grosche, J., Roßner, S., Schneider, D., & Brückner, G.
Affiliations
Leipzig University (DE)
Corresponding author
Brückner, Gert
Venue
Journal of Neuroscience Research
Publisher
Wiley
Published
2005-04
Volume
80
Issue
4
Pages
539-548
ISSN
  • 0360-4012 (ISSN-L)
  • 1097-4547
OpenAlex
W2072975935
Cited by
103
References
78
Citations by year
2026: 2 · 2025: 3 · 2024: 8 · 2023: 3 · 2022: 8 · 2021: 5 · 2020: 7 · 2019: 4 · 2018: 8 · 2017: 9 · 2016: 5 · 2015: 8 · 2014: 7 · 2013: 3 · 2012: 3
FWCI
1.09
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuroscience Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Proteoglycans and glycosaminoglycans research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Neurology › Neurological Disorders and Treatments
Keywords
perineuronal nets, extracellular matrix, focal cerebral ischemia, middle cerebral artery occlusion, chondroitin sulfate proteoglycans, glycosaminoglycan degradation, proteoglycan core protein, glial scar, cortical interneurons, stroke, spontaneously hypertensive rats, neurodegeneration
MeSH terms
Animals, Cell Count, Cerebral Cortex, Brain Ischemia, Disease Models, Animal, Extracellular Matrix, Gene Expression Regulation, Glial Fibrillary Acidic Protein, Immunohistochemistry, Functional Laterality, Male, Models, Biological, Nerve Net, Parvalbumins, Proteoglycans, Rats, Inbred SHR, Thalamus, Time Factors, Receptors, N-Acetylglucosamine, Plant Lectins, Rats

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