Cited by 65Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsInflammasome and immune disorders

Reactive or transgenic increase in microglial TYROBP reveals a TREM2‐independent TYROBP–APOE link in wild‐type and Alzheimer's‐related mice

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Audrain, Mickael, Haure‐Mirande, Jean‐Vianney, Mleczko, Justyna, Wang, Minghui, Griffin, Jennifer K., St George‐Hyslop, Peter H., Fraser, Paul, Zhang, Bin +2 more·2021·Alzheimer's & Dementia

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Abstract

Introduction: Microglial TYROBP (DAP12) is a network hub and driver in sporadic late‐onset Alzheimer's disease (AD). TYROBP is a cytoplasmic adaptor for TREM2 and other receptors, but little is known about its roles and actions in AD. Herein, we demonstrate that endogenous Tyrobp transcription is specifically increased in recruited microglia. Methods: Using a novel transgenic mouse overexpressing TYROBP in microglia, we observed a decrease of the amyloid burden and an increase of TAU phosphorylation stoichiometry when crossed with APP/PSEN1 or MAPT P301S mice, respectively. Characterization of these mice revealed Tyrobp ‐related modulation of apolipoprotein E ( Apoe ) transcription. We also showed that Tyrobp and Apoe mRNAs were increased in Trem2 ‐null microglia recruited around either amyloid beta deposits or a cortical stab injury. Conversely, microglial Apoe transcription was dramatically diminished when Tyrobp was absent. Conclusions: Our results provide evidence that TYROBP‐APOE signaling does not require TREM2 and could be an initiating step in establishment of the d isease‐ a ssociated m icroglia (DAM) phenotype.

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Authors
Audrain, M., Haure‐Mirande, J., Mleczko, J., Wang, M., Griffin, J. K., St George‐Hyslop, P. H., Fraser, P., Zhang, B., Gandy, S., & Ehrlich, M. E.
Affiliations
  • Department of Neurology Icahn School of Medicine at Mount Sinai New York New York USA
  • Icahn School of Medicine at Mount Sinai (US)
  • University of Toronto (CA)
  • Tanz Centre for Research in Neurodegenerative Diseases University of Toronto Toronto ON Canada
  • James J. Peters VA Medical Center (US)
Corresponding author
Gandy, Sam
Venue
Alzheimer's & Dementia
Publisher
Wiley
Published
2020-12-12
Volume
17
Issue
2
Pages
149-163
ISSN
  • 1552-5260 (ISSN-L)
  • 1552-5279
OpenAlex
W3112334124
Cited by
65
References
21
Citations by year
2026: 12 · 2025: 11 · 2024: 17 · 2023: 8 · 2022: 12 · 2021: 4 · 2020: 1
FWCI
2.42
Type
journal article
Language
en
Open access
Locations
  • Alzheimer s & Dementia (publishedVersion, cc-by-nc)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (U01 AG046170, R01 AG057907)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
TYROBP, DAP12
MeSH terms
Alzheimer Disease, Amyloidosis, Animals, Apolipoproteins E, Brain, Disease Models, Animal, Humans, Membrane Glycoproteins, Mice, Transgenic, Phosphorylation, Receptors, Immunologic, Signal Transduction, Amyloid beta-Protein Precursor, tau Proteins, Microglia, Mice, Knockout, Adaptor Proteins, Signal Transducing, Mice, Presenilin-1

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