Cited by 46Neuroinflammation and Neurodegeneration MechanismsTraumatic Brain Injury and Neurovascular DisturbancesBarrier Structure and Function Studies

Glucocorticoid signaling in myeloid cells worsens acute CNS injury and inflammation

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Sorrells, Shawn F., Caso, Javier R., Munhoz, Carolina D., Hu, Caroline K., Tran, Kevin V., Miguel, Zurine D., Chien, Bonnie Y., Sapolsky, Robert M.·2013·The Journal of Neuroscience

Abstract

Glucocorticoid stress hormones (GCs) are well known for being anti-inflammatory, but some reports suggest that GCs can also augment aspects of inflammation during acute brain injury. Because the GC receptor (GR) is ubiquitously expressed throughout the brain, it is difficult to know which cell types might mediate these unusual "proinflammatory" GC actions. We examined this with cell type-specific deletion or overexpression of GR in mice experiencing seizure or ischemia. Counter to their classical anti-inflammatory actions, GR signaling in myeloid cells increased Iba-1 and CD68 staining as well as nuclear p65 levels in the injured tissue. GCs also reduced levels of occludin, claudin 5, and caveolin 1, proteins central to blood-brain-barrier integrity; these effects required GR in endothelial cells. Finally, GCs compromised neuron survival, an effect mediated by GR in myeloid and endothelial cells to a greater extent than by neuronal GR.

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Crossref · 10.1523/jneurosci.4705-12.2013

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  • GR disruption in the forebrain did not influence neuronal death or damaged area in the hippocampus following an excitotoxic insult, nor the infarct volume in a model of focal cerebral ischemia.

    “However, current evidence indicates that GR disruption in the forebrain (FBGRKO vs. WT) did not influence neuronal death or damaged area in the hippocampus following an excitotoxic insult, nor the infarct volume in a model of focal cerebral ischemia (117).”
  • GR activation in endothelial cells of brain vessels might be both necessary and sufficient to constrain the production of key structural proteins of the BBB following focal cerebral ischemia.

    “Using the Tie2-GRKO mice, one group recently revealed that GR activation in endothelial cells of brain vessels might be both necessary and sufficient to constrain the production of key structural proteins of the BBB following focal cerebral ischemia (117).”

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Authors
Sorrells, S. F., Caso, J. R., Munhoz, C. D., Hu, C. K., Tran, K. V., Miguel, Z. D., Chien, B. Y., & Sapolsky, R. M.
Affiliations
  • Stanford University (US)
  • Universidade de São Paulo (BR)
Corresponding author
Sorrells, Shawn F.
Venue
The Journal of Neuroscience
Published
2013-05-01
Volume
33
Issue
18
Pages
7877-7889
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2050779306
Cited by
46
References
51
Citations by year
2025: 2 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 6 · 2020: 1 · 2019: 5 · 2018: 1 · 2017: 6 · 2016: 4 · 2015: 4 · 2014: 10 · 2013: 2
FWCI
3.74
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
Funders
  • Ministerio de Ciencia e Innovación
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (R01NS059918, F31NS063491)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
Keywords
glucocorticoid receptor, myeloid cells, acute brain injury, neuroinflammation, seizures, cerebral ischemia, blood-brain barrier integrity, endothelial cells, neuronal survival, cell type-specific gene deletion, occludin, claudin-5, caveolin-1, NF-κB p65
MeSH terms
NF-kappaB-Inducing Kinase, Analysis of Variance, Animals, Brain Injuries, Calcium-Binding Proteins, Corticosterone, Disease Models, Animal, Encephalitis, Gene Expression Regulation, Kainic Acid, Male, Mice, Inbred C57BL, Mice, Transgenic, Microfilament Proteins, Receptors, Glucocorticoid, Signal Transduction, Cytokines, Protein Serine-Threonine Kinases, Brain-Derived Neurotrophic Factor, Infarction, Middle Cerebral Artery, Brain Infarction, Receptor Protein-Tyrosine Kinases, Myeloid Cells, Receptor, TIE-2, Green Fluorescent Proteins, Mice, Calcium-Calmodulin-Dependent Protein Kinase Type 2

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