Cited by 49Neuroinflammation and Neurodegeneration MechanismsNeuroscience and Neuropharmacology ResearchNeurological Disease Mechanisms and Treatments

Valproic acid induces microglial dysfunction, not apoptosis, in human glial cultures

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Gibbons, Hannah M., Smith, Amy M., Teoh, H. Heng, Bergin, Peter M., Mee, Edward W., Faull, Richard L.M., Dragunow, Mike·2011·Neurobiology of Disease

Abstract

Valproic acid (VPA) is widely used for the treatment of mood disorders and epilepsy, but its mechanism of action is unclear. In vivo and in vitro studies using rodent models have demonstrated that VPA has both neuroprotective and neurotrophic effects. These beneficial effects are, in part, through modulation of glial cell function. Recently, we and others have shown that VPA selectively induces caspase-3 mediated apoptosis in rodent microglial cells. However, the effect of VPA on human microglia has not been tested. In this study, using microglia derived from adult human brains, we demonstrate that VPA does not induce microglial apoptosis as determined by the absence of caspase-3 cleavage. However, VPA does partially decrease the expression of the microglial markers PU.1 and CD45, as well as dramatically reducing microglial phagocytosis. Due to the many roles of microglia in the brain, these VPA-induced alterations in microglial phenotype could potentially have major effects on physiological and pathological actions of these cells.

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Crossref · 10.1016/j.nbd.2010.08.024

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  • Microglial phagocytosis is regulated via an epigenetic mechanism.

    “suggesting the its regulation of microglial phagocytosis via epigenetic mechanism [36-38].”
  • Valproic acid treatment of primary adult human microglia reduces phagocytic capacity and expression of PU.1 and CD45.

    “Valproic acid treatment, which selectively inhibits the catalytic activity of class I HDACs and induces proteasomal degradation of HDAC2, of primary adult human microglia reduces phagocytic capacity and expression of PU.1 and CD45, suggesting the its regulation of microglial phagocytosis via epigenetic mechanism [36-38].”

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Authors
Gibbons, H. M., Smith, A. M., Teoh, H. H., Bergin, P. M., Mee, E. W., Faull, R. L. M., & Dragunow, M.
Affiliations
University of Auckland (NZ)
Corresponding author
Dragunow, Mike
Venue
Neurobiology of Disease
Publisher
Elsevier BV
Published
2011-01
Volume
41
Issue
1
Pages
96-103
ISSN
0969-9961 (ISSN-L)
OpenAlex
W1998694769
Cited by
49
References
46
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 4 · 2021: 3 · 2020: 6 · 2019: 2 · 2018: 3 · 2017: 2 · 2016: 1 · 2015: 1 · 2014: 7 · 2013: 9 · 2012: 2
FWCI
2.70
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Disease (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • ResearchSpace (University of Auckland) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
valproic acid, microglial dysfunction, microglial apoptosis, caspase-3, human microglia, microglial phagocytosis, PU.1, CD45, microglial phenotype, glial cells, epilepsy, mood disorders
MeSH terms
Proto-Oncogene Protein Spi-1, Adult, Anticonvulsants, Cells, Cultured, Humans, Phagocytosis, Proto-Oncogene Proteins, Valproic Acid, Trans-Activators, Apoptosis, Leukocyte Common Antigens, Microglia, Caspase 3

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