Cited by 58Neuroinflammation and Neurodegeneration MechanismsTryptophan and brain disordersAlzheimer's disease research and treatments

Proinflammatory cytokine interferon‐γ increases induction of indoleamine 2,3‐dioxygenase in monocytic cells primed with amyloid β peptide 1–42: implications for the pathogenesis of Alzheimer’s disease

Yamada, Akiko, Akimoto, Hidetoshi, Kagawa, Syota, Guillemin, Gilles J., Takikawa, Osamu·2009·Journal of Neurochemistry

Abstract

Indoleamine 2,3‐dioxygenase (IDO) is the rate‐limiting enzyme of the kynurenine pathway of tryptophan metabolism, ultimately leading to production of the excitotoxin quinolinic acid (QUIN) by monocytic cells. In the Tg2576 mouse model of Alzheimer’s disease, systemic inflammation induced by lipopolysaccharide leads to an increase in IDO expression and QUIN production in microglia surrounding amyloid plaques. We examined whether the IDO over‐expression in microglia could be mediated by brain proinflammatory cytokines induced during the peripheral inflammation using THP‐1 cells and peripheral blood mononuclear cells (PBMC) as models for microglia. THP‐1 cells pre‐treated with 5–25 μM amyloid β peptide (Aβ) (1–42) but not with Aβ (1–40) or Aβ (25–35) became an activated state as indicated by their morphological changes and enhanced adhesiveness. IDO expression was only slightly increased in the reactive cells but strongly enhanced following treatment with proinflammatory cytokine interferon‐γ (IFN‐γ) but not with interleukin‐1β, tumor necrosis factor‐α, or interleukin‐6 at 100 U/mL. The concomitant addition of Aβ (1–42) with IFN‐γ was totally ineffective, indicating that Aβ pre‐treatment is prerequisite for a high IDO expression. The priming effect of Aβ (1–42) for the IDO induction was also observed for PBMC. These findings suggest that IFN‐γ induces IDO over‐expression in the primed microglia surrounding amyloid plaques.

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Crossref · 10.1111/j.1471-4159.2009.06175.x

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Authors
Yamada, A., Akimoto, H., Kagawa, S., Guillemin, G. J., & Takikawa, O.
Affiliations
  • National Center for Geriatrics and Gerontology (JP)
  • St Vincent's Hospital Sydney (AU)
Corresponding author
Takikawa, Osamu
Venue
Journal of Neurochemistry
Publisher
Wiley
Published
2009-07-13
Volume
110
Issue
3
Pages
791-800
ISSN
  • 0022-3042 (ISSN-L)
  • 1471-4159
OpenAlex
W2041955403
Cited by
58
References
12
Citations by year
2025: 2 · 2024: 4 · 2023: 6 · 2022: 4 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 5 · 2017: 4 · 2016: 3 · 2015: 4 · 2014: 3 · 2013: 4 · 2012: 3
FWCI
3.41
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neurochemistry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • ACT Government
  • Japan Society for the Promotion of Science (21590353)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
indoleamine 2,3-dioxygenase, interferon-gamma, amyloid beta peptide 1-42, microglia, kynurenine pathway, quinolinic acid, tryptophan metabolism, Alzheimer's disease, THP-1 cells, peripheral blood mononuclear cells, inflammatory cytokines, microglial activation, amyloid plaques, Tg2576 mice, lipopolysaccharide-induced inflammation
MeSH terms
Alzheimer Disease, Animals, Cells, Cultured, Enzyme Induction, Humans, Interferon-gamma, Kynurenine, Macrophage Activation, Monocytes, Peptide Fragments, Recombinant Proteins, Signal Transduction, Amyloid beta-Peptides, Inflammation Mediators, Cell Line, Tumor, Indoleamine-Pyrrole 2,3,-Dioxygenase, Mice

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