IFN‐γ promotes τ phosphorylation without affecting mature tangles
Open accessAbstract
Inflammatory activation precedes and correlates with accumulating τ lesions in Alzheimer's disease and tauopathies. However, the relationship between neuroinflammation and etiology of pathologic τ remains elusive. To evaluate whether inflammatory signaling may promote or accelerate neurofibrillary tangle pathology, we explored the effect of recombinant adeno‐associated virus (rAAV)‐mediated overexpression of a master inflammatory cytokine, IFN‐γ, on τ phosphorylation. In initial studies in primary neuroglial cultures, rAAV‐mediated expression of IFN‐γ did not alter endogenous τ production or paired helical filament τ phosphorylation. Next, we tested the effect of rAAV‐mediated expression of IFN‐γ in the brains of 2 mouse models of tauopathy: JNPL3 and rTg4510. In both models, IFN‐γ increased 1) signal transducer and activator of transcription 1 levels and gliosis, and 2) hyperphosphorylation and conformational alterations of soluble τ compared with control cohorts. However, sarkosyl‐insoluble phosphorylated τ levels and ubiquitin staining were unaltered in the IFN‐γ cohorts. Notably, IFN‐γ‐induced τ hyperphosphorylation was associated with release of the inhibitory effect of glycogen synthase kinase 3β function by decreasing Ser9 phosphorylation. Our data suggest that type II IFN signaling can promote τ phosphorylation by modulating cellular kinase activity, though this is insufficient in accelerating neuritic tangle pathology.—Li, A., Ceballos‐Diaz, C., DiNunno, N., Levites, Y., Cruz, P. E., Lewis, J., Golde, T. E., Chakrabarty, P. IFN‐γ promotes τ phosphorylation without affecting mature tangles. FASEB J. 29, 4384‐4398 (2015). www.fasebj.org
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- Authors
- Li, A., Ceballos‐Diaz, C., DiNunno, N., Levites, Y., Cruz, P. E., Lewis, J., Golde, T. E., & Chakrabarty, P.
- Affiliations
- University of Florida (US)
- Corresponding author
- Golde, Todd E.
- Chakrabarty, Paramita
- Venue
- The FASEB Journal
- Publisher
- Wiley
- Published
- 2015-07-08
- Volume
- 29
- Issue
- 10
- Pages
- 4384-4398
- ISSN
- 0892-6638 (ISSN-L)
- 1530-6860
- PMC
- PMC6137542
- OpenAlex
- W2127063285
- Cited by
- 43
- References
- 9
- Citations by year
- 2026: 4 · 2025: 5 · 2024: 1 · 2022: 15 · 2021: 3 · 2020: 5 · 2019: 2 · 2018: 1 · 2017: 5 · 2016: 2
- FWCI
- 1.78
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Locations
- The FASEB Journal (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- BrightFocus Foundation
- Topics
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Life Sciences › Neuroscience › Developmental Neuroscience › Anesthesia and Neurotoxicity Research
- Keywords
- interferon-gamma, tau phosphorylation, neuroinflammation, neurofibrillary tangles, tauopathy, Alzheimer's disease, STAT1, gliosis, glycogen synthase kinase-3β, soluble tau, adeno-associated virus overexpression
- MeSH terms
- Glycogen Synthase Kinase 3 beta, Dependovirus, Animals, Animals, Newborn, Brain, Cells, Cultured, Enzyme Activation, Female, Immunohistochemistry, Interferon-gamma, Male, Mice, Inbred C3H, Mice, Transgenic, Neuroglia, Phosphorylation, Immunoblotting, Signal Transduction, Neurofibrillary Tangles, tau Proteins, Tauopathies, Glycogen Synthase Kinase 3, STAT1 Transcription Factor
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