Cited by 82Inflammasome and immune disordersNeuroinflammation and Neurodegeneration MechanismsImmune Response and Inflammation

Inflammasome-Induced IL-1β Secretion in Microglia Is Characterized by Delayed Kinetics and Is Only Partially Dependent on Inflammatory Caspases

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Burm, Saskia M., Zuiderwijk-Sick, Ella A., ‘t Jong, Anke E.J., van der Putten, Céline, Veth, Jennifer, Kondova, Ivanela, Bajramovic, Jeffrey J.·2015·The Journal of Neuroscience

Abstract

Inflammasomes are multiprotein complexes that link pathogen recognition and cellular stress to the processing of the proinflammatory cytokine interleukin-1β (IL-1β). Whereas inflammasome-mediated activation is heavily studied in hematopoietic macrophages and dendritic cells, much less is known about microglia, resident tissue macrophages of the brain that originate from a distinct progenitor. To directly compare inflammasome-mediated activation in different types of macrophages, we isolated primary microglia and hematopoietic macrophages from adult, healthy rhesus macaques. We analyzed the expression profile of NOD (nucleotide-binding oligomerization domain)-like receptors, adaptor proteins, and caspases and characterized inflammasome activation and regulation in detail. We here demonstrate that primary microglia can respond to the same innate stimuli as hematopoietic macrophages. However, microglial responses are more persistent due to lack of negative regulation on pro-IL-1β expression. In addition, we show that while caspase 1, 4, and 5 activation is pivotal for inflammasome-induced IL-1β secretion by hematopoietic macrophages, microglial secretion of IL-1β is only partially dependent on these inflammatory caspases. These results identify key cell type-specific differences that may aid the development of strategies to modulate innate immune responses in the brain.

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Crossref · 10.1523/jneurosci.2510-14.2015

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  • The action of TET2 is highly context-specific, with fundamental differences in the regulation of innate immune responses between peripheral immune cells (and specifically monocyte-derived macrophages) and microglia.

    “This effect differs from the result reported here and highlights fundamental differences in the regulation of the innate immune responses between peripheral immune cells (and specifically monocyte-derived macrophages) and microglia (Burm et al., 2015) (London et al., 2013; Zarruk et al., 2018), suggesting that the action of TET2 is highly context-specific.”

    From TET2 Regulates the Neuroinflammatory Response in Microglia (2019) · cites this paper as Burm et al., 2015

  • IL-1β activation is not strictly caspase-1 dependent in primary microglia, suggesting that inflammasomes may not be necessary for the processing of IL-1β into its mature form in this CNS innate immune cell.

    “Burm et al (2015) have recently demonstrated that IL-1β activation is not strictly caspase-1 dependent in primary microglia, suggesting that inflammasomes may not be necessary for the processing of IL-1β into its mature form in this CNS innate immune cell.”

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Authors
Burm, S. M., Zuiderwijk-Sick, E. A., ‘t Jong, A. E. J., van der Putten, C., Veth, J., Kondova, I., & Bajramovic, J. J.
Affiliations
Biomedical Primate Research Centre (NL)
Venue
The Journal of Neuroscience
Published
2015-01-14
Volume
35
Issue
2
Pages
678-687
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2020008646
Cited by
82
References
61
Citations by year
2026: 1 · 2025: 3 · 2024: 6 · 2023: 4 · 2022: 11 · 2021: 8 · 2020: 10 · 2019: 9 · 2018: 8 · 2017: 11 · 2016: 9 · 2015: 2
FWCI
4.34
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
inflammasome, interleukin-1β secretion, microglia, NOD-like receptors, caspase-1, caspase-4, caspase-5, rhesus monkeys
MeSH terms
Animals, Cells, Cultured, Female, Kinetics, Macaca mulatta, Macrophages, Male, Reaction Time, Microglia, Caspases, Nod2 Signaling Adaptor Protein, Nod1 Signaling Adaptor Protein, Interleukin-1beta, Inflammasomes

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