Cited by 18Neuroinflammation and Neurodegeneration MechanismsInflammasome and immune disordersLysosomal Storage Disorders Research

Immune response of BV-2 microglial cells is impacted by peroxisomal beta-oxidation

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Tawbeh, Ali, Raas, Quentin, Tahri-Joutey, Mounia, Keime, Céline, Kaiser, Romain, Trompier, Doriane, Nasser, Boubker, Bellanger, Emma +12 more·2023·Frontiers in Molecular Neuroscience

Abstract

Microglia are crucial for brain homeostasis, and dysfunction of these cells is a key driver in most neurodegenerative diseases, including peroxisomal leukodystrophies. In X-linked adrenoleukodystrophy (X-ALD), a neuroinflammatory disorder, very long-chain fatty acid (VLCFA) accumulation due to impaired degradation within peroxisomes results in microglial defects, but the underlying mechanisms remain unclear. Using CRISPR/Cas9 gene editing of key genes in peroxisomal VLCFA breakdown ( Abcd1, Abcd2 , and Acox1 ), we recently established easily accessible microglial BV-2 cell models to study the impact of dysfunctional peroxisomal β-oxidation and revealed a disease-associated microglial-like signature in these cell lines. Transcriptomic analysis suggested consequences on the immune response. To clarify how impaired lipid degradation impacts the immune function of microglia, we here used RNA-sequencing and functional assays related to the immune response to compare wild-type and mutant BV-2 cell lines under basal conditions and upon pro-inflammatory lipopolysaccharide (LPS) activation. A majority of genes encoding proinflammatory cytokines, as well as genes involved in phagocytosis, antigen presentation, and co-stimulation of T lymphocytes, were found differentially overexpressed. The transcriptomic alterations were reflected by altered phagocytic capacity, inflammasome activation, increased release of inflammatory cytokines, including TNF, and upregulated response of T lymphocytes primed by mutant BV-2 cells presenting peptides. Together, the present study shows that peroxisomal β-oxidation defects resulting in lipid alterations, including VLCFA accumulation, directly reprogram the main cellular functions of microglia. The elucidation of this link between lipid metabolism and the immune response of microglia will help to better understand the pathogenesis of peroxisomal leukodystrophies.

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Crossref · 10.3389/fnmol.2023.1299314

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  • Following LPS exposure, ABCD1-mutated microglia had numerous differentially expressed genes encoding pro-inflammatory cytokines or involved in phagocytosis, antigen presentation, and co-stimulation of T lymphocytes.

    “Following LPS exposure, the ABCD1-mutated microglia had numerous differentially expressed genes encoding pro-inflammatory cytokines or involved in phagocytosis, antigen presentation, and co-stimulation of T lymphocytes.”

    From Revisiting the Pathogenesis of X-Linked Adrenoleukodystrophy (2025) · cites this paper as [352]

    The Results sections on LPS response, phagocytosis, and antigen presentation report differentially expressed genes in all the categories named. However, the tested ABCD1-deficient cells were murine BV-2 cells with both Abcd1 and Abcd2 knocked out; the claim omits the Abcd2 mutation and could be read as applying to ABCD1 mutation alone. (LLM, conf=0.84)

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Authors
Tawbeh, A., Raas, Q., Tahri-Joutey, M., Keime, C., Kaiser, R., Trompier, D., Nasser, B., Bellanger, E., Dessard, M., Hamon, Y., Benani, A., Di Cara, F., Cunha Alves, T., Berger, J., Weinhofer, I., Mandard, S., Cherkaoui-Malki, M., Andreoletti, P., Gondcaille, C., & Savary, S.
Affiliations
  • Université de Bourgogne (FR)
  • Centre National de la Recherche Scientifique (FR)
  • Université Hassan 1er (MA)
  • Medical University of Vienna (AT)
  • Inserm (FR)
Corresponding author
Savary, Stéphane
Venue
Frontiers in Molecular Neuroscience
Published
2023-12-18
Volume
16
Pages
1299314-1299314
ISSN
1662-5099 (ISSN-L)
OpenAlex
W4389918699
Cited by
18
References
106
Citations by year
2026: 7 · 2025: 9 · 2024: 2
FWCI
1.86
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Molecular Neuroscience (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Greater South Information System
Funders
Agence Nationale de la Recherche (ANR-19-CE07-0044, ANR-10-INBS-0009, ANR-11-LABX-0021, ANR-17-CE15-0032)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Health Sciences › Medicine › Physiology › Lysosomal Storage Disorders Research
Keywords
microglia, peroxisomal beta-oxidation, X-linked adrenoleukodystrophy, very long chain fatty acids, BV-2 cells, ABCD1, ABCD2, ACOX1, lipopolysaccharide stimulation, inflammatory cytokines, phagocytosis, antigen presentation, inflammasome, TNF-α, lipid metabolism, neuroinflammation

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