Cited by 367Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsNeuroscience and Neuropharmacology Research

The DOI matches its Crossref record; 62 of the 62 references it cites were found in a registry or an index.

Interferon-γ and Tumor Necrosis Factor-α Regulate Amyloid-β Plaque Deposition and β-Secretase Expression in Swedish Mutant APP Transgenic Mice

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Abstract

Reactive astrocytes and microglia in Alzheimer's disease surround amyloid plaques and secrete proinflammatory cytokines that affect neuronal function. Relationship between cytokine signaling and amyloid-beta peptide (Abeta) accumulation is poorly understood. Thus, we generated a novel Swedish beta-amyloid precursor protein mutant (APP) transgenic mouse in which the interferon (IFN)-gamma receptor type I was knocked out (APP/GRKO). IFN-gamma signaling loss in the APP/GRKO mice reduced gliosis and amyloid plaques at 14 months of age. Aggregated Abeta induced IFN-gamma production from co-culture of astrocytes and microglia, and IFN-gamma elicited tumor necrosis factor (TNF)-alpha secretion in wild type (WT) but not GRKO microglia co-cultured with astrocytes. Both IFN-gamma and TNF-alpha enhanced Abeta production from APP-expressing astrocytes and cortical neurons. TNF-alpha directly stimulated beta-site APP-cleaving enzyme (BACE1) expression and enhanced beta-processing of APP in astrocytes. The numbers of reactive astrocytes expressing BACE1 were increased in APP compared with APP/GRKO mice in both cortex and hippocampus. IFN-gamma and TNF-alpha activation of WT microglia suppressed Abeta degradation, whereas GRKO microglia had no changes. These results support the idea that glial IFN-gamma and TNF-alpha enhance Abeta deposition through BACE1 expression and suppression of Abeta clearance. Taken together, these observations suggest that proinflammatory cytokines are directly linked to Alzheimer's disease pathogenesis.

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Metadata

Authors
Yamamoto, M., Kiyota, T., Horiba, M., Buescher, J. L., Walsh, S. M., Gendelman, H. E., & Ikezu, T.
Affiliations
  • Nebraska Medical Center (US)
  • University of Nebraska Medical Center (US)
Corresponding author
Ikezu, Tsuneya
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2007-02
Volume
170
Issue
2
Pages
680-692
ISSN
0002-9440 (ISSN-L)
OpenAlex
W2062084653
Cited by
367
References
62
Citations by year
2026: 6 · 2025: 14 · 2024: 16 · 2023: 16 · 2022: 19 · 2021: 26 · 2020: 21 · 2019: 19 · 2018: 23 · 2017: 18 · 2016: 18 · 2015: 16 · 2014: 25 · 2013: 22 · 2012: 20
FWCI
14.54
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Fondation pour la Recherche sur Alzheimer
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (P01NS043985)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
Alzheimer's disease, amyloid plaques, interferon-gamma, TNF-α, beta-secretase, BACE1, APP transgenic mice, astrocytes, microglia, gliosis, inflammatory cytokines, amyloid-beta clearance, amyloid beta degradation, APP processing
MeSH terms
Interferon gamma Receptor, Alzheimer Disease, Animals, Astrocytes, Cells, Cultured, Cerebellar Cortex, Enzyme Activation, Gliosis, Humans, Interferon-gamma, Neurons, Tumor Necrosis Factor-alpha, Signal Transduction, Gene Expression Regulation, Enzymologic, Amyloid beta-Peptides, Aspartic Acid Endopeptidases, Receptors, Interferon, Microglia, Mice, Knockout, Coculture Techniques, Mice, Amyloid Precursor Protein Secretases, Plaque, Amyloid

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