Cited by 73Neuroinflammation and Neurodegeneration MechanismsTryptophan and brain disordersInflammasome and immune disorders

Insensitivity of astrocytes to interleukin 10 signaling following peripheral immune challenge results in prolonged microglial activation in the aged brain

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Norden, Diana M., Trojanowski, Paige J., Walker, Frederick R., Godbout, Jonathan P.·2016·Neurobiology of Aging

Abstract

Immune-activated microglia from aged mice produce exaggerated levels of cytokines. Despite high levels of microglial interleukin (IL)-10 in the aged brain, neuroinflammation was prolonged and associated with depressive-like deficits. Because astrocytes respond to IL-10 and, in turn, attenuate microglial activation, we investigated if astrocyte-mediated resolution of microglial activation was impaired with age. Here, aged astrocytes had a dysfunctional profile with higher glial fibrillary acidic protein, lower glutamate transporter expression, and significant cytoskeletal re-arrangement. Moreover, aged astrocytes had reduced expression of growth factors and IL-10 receptor-1 (IL-10R1). After in vivo lipopolysaccharide immune challenge, aged astrocytes had a molecular signature associated with reduced responsiveness to IL-10. This IL-10 insensitivity of aged astrocytes resulted in a failure to induce IL-10R1 and transforming growth factor β and resolve microglial activation. In addition, adult astrocytes reduced microglial activation when co-cultured ex vivo, whereas aged astrocytes did not. Consistent with the aging studies, IL-10R(KO) astrocytes did not augment transforming growth factor β after immune challenge and failed to resolve microglial activation. Collectively, a major cytokine-regulatory loop between activated microglia and astrocytes is impaired in the aged brain.

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Crossref · 10.1016/j.neurobiolaging.2016.04.014

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  • Aging was associated with reduced IL-10 receptor on aged astrocytes that resulted in a failure to resolve microglia activation in the aged brain.

    “Aging was associated with reduced IL-10 receptor on aged astrocytes that resulted in a failure to resolve microglia activation in the aged brain (Norden et al, 2016).”

    From Microglia Priming with Aging and Stress (2017) · cites this paper as Norden et al, 2016

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Authors
Norden, D. M., Trojanowski, P. J., Walker, F. R., & Godbout, J. P.
Affiliations
  • The Ohio State University (US)
  • University of Newcastle Australia (AU)
Corresponding author
Godbout, Jonathan P.
Venue
Neurobiology of Aging
Publisher
Elsevier BV
Published
2016-08
Volume
44
Pages
22-41
ISSN
0197-4580 (ISSN-L)
OpenAlex
W2343167511
Cited by
73
References
86
Citations by year
2026: 7 · 2025: 6 · 2024: 9 · 2023: 5 · 2022: 10 · 2021: 9 · 2020: 9 · 2019: 5 · 2018: 6 · 2017: 5 · 2016: 2
FWCI
3.29
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Aging (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • NOVA (University of Newcastle Australia) (submittedVersion)
Funders
NIA (R01-AG-033028)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
astrocytes, IL-10, microglial activation, neuroinflammation, brain aging, IL-10 receptor 1, TGF-beta, lipopolysaccharide challenge, glial fibrillary acidic protein, glutamate transporters, astrocyte-microglia interaction, depression-like behavior, cytokine signaling
MeSH terms
Aging, Animals, Astrocytes, Brain, Cells, Cultured, Glial Fibrillary Acidic Protein, Lipopolysaccharides, Mice, Inbred BALB C, Mice, Inbred C57BL, Signal Transduction, Transforming Growth Factor beta, Interleukin-10, Microglia, Coculture Techniques, Amino Acid Transport System X-AG, Interleukin-10 Receptor alpha Subunit

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