Cited by 190Neuroinflammation and Neurodegeneration MechanismsTraumatic Brain Injury and Neurovascular DisturbancesNerve injury and regeneration

Central Nervous System-Initiated Inflammation and Neurotrophism in Trauma: IL-1β Is Required for the Production of Ciliary Neurotrophic Factor

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Herx, Leonie M, Rivest, Serge, Yong, V Wee·2000·The Journal of Immunology

Abstract

Injury to the CNS results in the production and accumulation of inflammatory cytokines within this tissue. The origin and role of inflammation within the CNS remains controversial. In this paper we demonstrate that an acute trauma to the mouse brain results in the rapid elevation of IL-1beta. This increase is detectable by 15 min after injury and significantly precedes the influx of leukocytes that occurs hours after. To confirm that IL-1beta up-regulation is initiated by cells within the CNS, in situ hybridization for cytokine transcript was combined with cell type immunohistochemistry. The results reveal parenchymal microglia to be the sole source of IL-1beta at 3 h postinjury. A role for CNS-initiated inflammation was addressed by examining the expression of the neurotrophic factor, ciliary neurotrophic factor (CNTF). Analysis of their temporal relationship suggests the up-regulation of CNTF by IL-1beta, which was confirmed through three lines of evidence. First, the application of IL-1 receptor antagonist into the lesion site attenuated the up-regulation of CNTF. Second, the examination of corticectomized animals genetically deficient for IL-1beta found no CNTF up-regulation. Third, the lack of CNTF elevation in IL-1beta null mice was rescued through exogenous application of IL-1beta into the lesion site. These findings provide the first evidence of the requirement for IL-1beta in the production of CNTF following CNS trauma, and suggest that inflammation can have a beneficial impact on the regenerative capacity of the CNS.

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Crossref · 10.4049/jimmunol.165.4.2232

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  1. Pearson, V. L., N. J. Rothwell, and S. Toulmond,. 1999. Excitotoxic brain dam- age in the rat induces interleukin-1␤ protein in microglia and astrocytes: corre- lation with the progression of cell death. Glia 25:311.

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Authors
Herx, L. M., Rivest, S., & Yong, V. W.
Affiliations
  • University of Calgary (CA)
  • Université Laval (CA)
Venue
The Journal of Immunology
Published
2000-08
Volume
165
Issue
4
Pages
2232-2239
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W2156066294
Cited by
190
References
54
Citations by year
2023: 2 · 2022: 4 · 2021: 1 · 2020: 6 · 2019: 5 · 2018: 4 · 2017: 7 · 2016: 8 · 2015: 7 · 2014: 4 · 2013: 9 · 2012: 10
FWCI
6.72
Type
journal article
Language
en
Open access
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nerve injury and regeneration
Keywords
central nervous system injury, traumatic brain injury, IL-1β, ciliary neurotrophic factor, microglia, neuroinflammation, neurotrophic factors, interleukin-1 receptor antagonist, corticectomy, central nervous system regeneration, inflammatory cytokines
MeSH terms
Animals, Brain, Brain Injuries, Female, Frontal Lobe, Interleukin-1, Mice, Inbred C57BL, RNA, Messenger, Sialoglycoproteins, Injections, Intralesional, Up-Regulation, Cytokines, Receptors, Interleukin-1, Mice, Knockout, Ciliary Neurotrophic Factor, Mice, Interleukin 1 Receptor Antagonist Protein

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