Cited by 29Neonatal and fetal brain pathologyNeuroinflammation and Neurodegeneration MechanismsPreterm Birth and Chorioamnionitis

LPS and TNF alpha modulate AMPA/NMDA receptor subunit expression and induce PGE2 and glutamate release in preterm fetal ovine mixed glial cultures

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Weaver-Mikaere, Luke, Gunn, Alistair J, Mitchell, Murray D, Bennet, Laura, Fraser, Mhoyra·2013·Journal of Neuroinflammation

Abstract

BACKGROUND: White matter injury (WMI) is the major antecedent of cerebral palsy in premature infants, and is often associated with maternal infection and the fetal inflammatory response. The current study explores the therapeutic potential of glutamate receptor blockade or cyclooxygenase-2 (COX-2) inhibition for inflammatory WMI. METHODS: Using fetal ovine derived mixed glia cultures exposed to tumour necrosis factor-α (TNF-α) or lipopolysaccharide (LPS), the expression of alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionate (AMPA) and N-methyl D-aspartate (NMDA) glutamate receptors and their contribution to inflammation mediated pre-oligodendrocyte (OL) death was evaluated. The functional significance of TNF-α and COX-2 signalling in glutamate release in association with TNF-α and LPS exposure was also assessed. RESULTS: AMPA and NMDA receptors were expressed in primary mixed glial cultures on developing OLs, the main cell-type present in fetal white matter at a period of high risk for WMI. We show that glutamate receptor expression and configuration are regulated by TNF-α and LPS exposure, but AMPA and NMDA blockade, either alone or in combination, did not reduce pre-OL death. Furthermore, we demonstrate that glutamate and prostaglandin E2 (PGE2) release following TNF-α or LPS are mediated by a TNF-α-COX-2 dependent mechanism. CONCLUSIONS: Overall, these findings suggest that glial-localised glutamate receptors likely play a limited role in OL demise associated with chronic inflammation, but supports the COX-2 pathway as a potential therapeutic target for infection/inflammatory-mediated WMI.

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  • Multiple studies using different species document activation of microglia and astrocytes in response to maternal inflammation that leads to dysregulation in glutamate homeostasis.

    “Multiple studies using different species of animals document an activation of microglia and astrocytes in response to maternal inflammation that leads to dysregulation in glutamate homeostasis (Roumier et al., 2008; Weaver-Mikaere et al., 2013; Zhang et al., 2016).”

    From Neuroinflammation as a risk factor for attention deficit hyperactivity disorder (2019) · cites this paper as Weaver-Mikaere et al., 2013

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Authors
Weaver-Mikaere, L., Gunn, A. J., Mitchell, M. D., Bennet, L., & Fraser, M.
Affiliations
University of Auckland (NZ)
Corresponding author
Fraser, Mhoyra
Venue
Journal of Neuroinflammation
Published
2013-12
Volume
10
Issue
1
Pages
153-153
ISSN
1742-2094 (ISSN-L)
OpenAlex
W2151415982
Cited by
29
References
62
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 3 · 2019: 4 · 2018: 3 · 2017: 2 · 2016: 4 · 2015: 3
FWCI
2.17
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroinflammation (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • QUT ePrints (Queensland University of Technology) (submittedVersion, cc-by)
  • ResearchSpace (University of Auckland) (submittedVersion, cc-by)
Funders
  • Kelliher Charitable Trust
  • Health Research Council of New Zealand
Topics
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Neonatal and fetal brain pathology
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Epidemiology › Preterm Birth and Chorioamnionitis
Keywords
white matter injury, cerebral palsy, preterm infants, glutamate receptors, AMPA receptors, NMDA receptor, oligodendrocyte death, lipopolysaccharide, TNF-α, cyclooxygenase-2, prostaglandin E2, glutamate release, fetal brain, glial inflammation, maternal infection
MeSH terms
Animals, Brain Injuries, Cells, Cultured, Disease Models, Animal, Encephalitis, Fetus, Immunohistochemistry, Lipopolysaccharides, Neuroglia, Radioimmunoassay, Sheep, Tumor Necrosis Factor-alpha, Blotting, Western, Dinoprostone, Receptors, N-Methyl-D-Aspartate, Receptors, Glutamate, Receptors, AMPA, Glutamic Acid, Cyclooxygenase 2, Real-Time Polymerase Chain Reaction

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