Cited by 48Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsInflammasome and immune disorders

MyD88-adaptor protein acts as a preventive mechanism for memory deficits in a mouse model of Alzheimer's disease

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Michaud, Jean-Philippe, Richard, Karine L, Rivest, Serge·2011·Molecular Neurodegeneration

Abstract

Background: Alzheimer's disease (AD) is an age-related neurodegenerative disorder associated with brain innate immune activation mainly mediated by microglia. These cells are known to be activated in the brain of AD patients and to produce inflammatory cytokines and neurotoxic molecules in response to Amyloid beta (Aβ). Activation of microglia can also promote Aβ clearance via Toll-like receptors (TLRs). Myeloid differentiation factor 88 (MyD88) is the adaptor molecule for most of these innate immune receptors, transducing the intracellular signal from TLRs to nucleus. Results: Here, we report that more than 50% reduction in MyD88 expression in a mouse model of AD accelerated spatial learning and memory deficits. Brain of APP swe/PS1-MyD88+/- mice was characterized by a delay in accumulation of Aβ plaques and increased soluble levels of Aβ oligomers. Furthermore, inflammatory monocyte subset and brain IL-1β gene expression were significantly reduced in APP swe/PS1 mice with impaired MyD88 signaling. Conclusions: These data indicate that activation of MyD88 intracellular signaling pathway, likely by TLRs, acts as a natural innate immune mechanism to restrict disease progression of APP swe/PS1 mice.

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  • Targeting MyD88 has yielded contradictory effects in AD models possibly due to differential effects on XO4+ and XO4− populations.

    “targeting MyD88 has also yielded contradictory effects in AD models72,73 possibly due to differential effects on XO4+ and XO4− populations.”

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Authors
Michaud, J.-P., Richard, K. L., & Rivest, S.
Affiliations
Centre hospitalier de l'Université Laval (CA)
Corresponding author
Rivest, Serge
Venue
Molecular Neurodegeneration
Published
2011-01-14
Volume
6
Issue
1
Pages
5-5
ISSN
1750-1326 (ISSN-L)
OpenAlex
W2129072475
Cited by
48
References
54
Citations by year
2026: 1 · 2024: 1 · 2023: 1 · 2022: 3 · 2021: 5 · 2019: 3 · 2018: 3 · 2017: 1 · 2016: 4 · 2015: 3 · 2014: 5 · 2013: 5 · 2012: 11
FWCI
5.02
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Molecular Neurodegeneration (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Canadian Institutes of Health Research
  • Research Institute for Microbial Diseases, Osaka University
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
MyD88, Alzheimer's disease, microglia, innate immunity, Toll-like receptors, amyloid-beta, spatial learning and memory deficits, neuroinflammation, IL-1β, amyloid plaques, soluble amyloid-beta oligomers, inflammatory monocytes

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