Cited by 378Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsInflammasome and immune disorders

The DOI matches its Crossref record; 59 of the 59 references it cites were found in a registry or an index.

TREM2 Acts Downstream of CD33 in Modulating Microglial Pathology in Alzheimer's Disease

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Abstract

The microglial receptors CD33 and TREM2 have been associated with risk for Alzheimer's disease (AD). Here, we investigated crosstalk between CD33 and TREM2. We showed that knockout of CD33 attenuated amyloid beta (Aβ) pathology and improved cognition in 5xFAD mice, both of which were abrogated by additional TREM2 knockout. Knocking out TREM2 in 5xFAD mice exacerbated Aβ pathology and neurodegeneration but reduced Iba1+ cell numbers, all of which could not be rescued by additional CD33 knockout. RNA-seq profiling of microglia revealed that genes related to phagocytosis and signaling (IL-6, IL-8, acute phase response) are upregulated in 5xFAD;CD33-/- and downregulated in 5xFAD;TREM2-/- mice. Differential gene expression in 5xFAD;CD33-/- microglia depended on the presence of TREM2, suggesting TREM2 acts downstream of CD33. Crosstalk between CD33 and TREM2 includes regulation of the IL-1β/IL-1RN axis and a gene set in the "receptor activity chemokine" cluster. Our results should facilitate AD therapeutics targeting these receptors.

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Authors
Griciuc, A., Patel, S., Federico, A. N., Choi, S. H., Innes, B. J., Oram, M. K., Cereghetti, G., McGinty, D., Anselmo, A., Sadreyev, R. I., Hickman, S. E., El Khoury, J., Colonna, M., & Tanzi, R. E.
Affiliations
  • Harvard University (US)
  • Washington University in St. Louis (US)
Corresponding author
Tanzi, Rudolph E.
Venue
Neuron
Publisher
Elsevier BV
Published
2019-09
Volume
103
Issue
5
Pages
820-835.e7
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2961845320
Cited by
378
References
59
Citations by year
2026: 36 · 2025: 63 · 2024: 54 · 2023: 49 · 2022: 65 · 2021: 59 · 2020: 42 · 2019: 8
FWCI
19.17
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
TREM2, CD33, Alzheimer's disease, microglia, amyloid-beta pathology, 5xFAD mice, microglial receptors, phagocytosis, microglial gene expression, neurodegeneration, cognitive impairment, receptor cross-talk
MeSH terms
Acute-Phase Reaction, Alzheimer Disease, Animals, Brain, Cognition, Disease Models, Animal, Gene Expression Regulation, Membrane Glycoproteins, Phagocytosis, Receptors, Immunologic, Interleukin-6, Interleukin-8, Amyloid beta-Peptides, Microglia, Mice, Knockout, Mice, Plaque, Amyloid, Sialic Acid Binding Ig-like Lectin 3

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