Cited by 69Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsNeurological Disease Mechanisms and Treatments

Interleukin-10 deficiency exacerbates inflammation-induced tau pathology

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Weston, Lea L., Jiang, Shanya, Chisholm, Devon, Jantzie, Lauren L., Bhaskar, Kiran·2021·Journal of Neuroinflammation

Abstract

Background: The presence of hyperphosphorylated microtubule-associated protein tau is strongly correlated with cognitive decline and neuroinflammation in Alzheimer’s disease and related tauopathies. However, the role of inflammation and anti-inflammatory interventions in tauopathies is unclear. Our goal was to determine if removing anti-inflammatory interleukin-10 (IL-10) during an acute inflammatory challenge has any effect on neuronal tau pathology. Methods: We induce systemic inflammation in Il10- deficient ( Il10 − / − ) versus Il10 + /+ (Non-Tg) control mice using a single intraperitoneal (i.p.) injection of lipopolysaccharide (LPS) to examine microglial activation and abnormal hyperphosphorylation of endogenous mouse tau protein. Tau phosphorylation was quantified by Western blotting and immunohistochemistry. Microglial morphology was quantified by skeleton analysis. Cytokine expression was determined by multiplex electro chemiluminescent immunoassay (MECI) from Meso Scale Discovery (MSD). Results: Our findings show that genetic deletion of Il10 promotes enhanced neuroinflammation and tau phosphorylation. First, LPS-induced tau hyperphosphorylation was significantly increased in Il10 − / − mice compared to controls. Second, LPS-treated Il10 − / − mice showed signs of neurodegeneration. Third, LPS-treated Il10 − / − mice showed robust IL-6 upregulation and direct treatment of primary neurons with IL-6 resulted in tau hyperphosphorylation on Ser396/Ser404 site. Conclusions: These data support that loss of IL-10 activates microglia, enhances IL-6, and leads to hyperphosphorylation of tau on AD-relevant epitopes in response to acute systemic inflammation.

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Authors
Weston, L. L., Jiang, S., Chisholm, D., Jantzie, L. L., & Bhaskar, K.
Affiliations
  • University of New Mexico (US)
  • Johns Hopkins University (US)
Corresponding author
Bhaskar, Kiran
Venue
Journal of Neuroinflammation
Published
2021-07-18
Volume
18
Issue
1
Pages
161-161
ISSN
1742-2094 (ISSN-L)
OpenAlex
W3184667630
Cited by
69
References
77
Citations by year
2026: 12 · 2025: 20 · 2024: 11 · 2023: 15 · 2022: 11
FWCI
5.81
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroinflammation (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institute of Allergy and Infectious Diseases (T32AI007538)
  • National Institute of Neurological Disorders and Stroke (R01NS083704, RF1NS083704)
  • National Institute of General Medical Sciences (P20GM121176)
  • National Institute on Aging (P20AG068077)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
IL-10, tau hyperphosphorylation, neuroinflammation, tauopathy, Alzheimer's disease, microglial activation, lipopolysaccharide-induced inflammation, interleukin-6, anti-inflammatory cytokines, neurodegeneration
MeSH terms
Animals, Disease Models, Animal, Immunohistochemistry, Inflammation, Lipopolysaccharides, Mice, Inbred C57BL, Mice, Transgenic, Neurons, Phosphorylation, Interleukin-6, Cytokines, Interleukin-10, tau Proteins, Microglia, Cell Culture Techniques, Tauopathies, Mice

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