Cited by 457Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsInflammasome and immune disorders

The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.

Disease Progression-Dependent Effects of TREM2 Deficiency in a Mouse Model of Alzheimer's Disease

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Abstract

Neuroinflammation is an important contributor to Alzheimer's disease (AD) pathogenesis, as underscored by the recent identification of immune-related genetic risk factors for AD, including coding variants in the gene TREM2(triggering receptor expressed on myeloid cells 2). Understanding TREM2 function promises to provide important insights into how neuroinflammation contributes to AD pathology. However, studies so far have produced seemingly conflicting results, with reports that amyloid pathology can be both decreased and increased in TREM2-deficient AD mouse models. In this study, we unify these previous findings by demonstrating that TREM2 deficiency ameliorates amyloid pathology early, but exacerbates it late in disease progression in the APPPS1–21 mouse model of AD. We also demonstrate that TREM2 deficiency decreases plaque-associated myeloid cell accumulation by reducing cell proliferation, specifically late in pathology. In addition, TREM2 deficiency reduces myeloid cell internalization of amyloid throughout pathology, but decreases inflammation-related gene transcript levels selectively late in disease progression. Together, these results suggest that TREM2 plays distinct functional roles at different stages in AD pathology. SIGNIFICANCE STATEMENT Alzheimer's disease (AD) is a devastating neurodegenerative disorder and there are currently no effective treatments that modify disease progression. However, the recent identification of genetic risk factors for AD promises to provide new insight into AD biology and possible new therapeutic targets. Among these risk factors, variants in the gene TREM2(triggering receptor expressed on myeloid cells 2) confer greatly elevated risk for developing the disease. We demonstrate that TREM2 deficiency has opposing effects on AD-related pathologies at early and late stages of disease progression, unifying previous work in the field. In addition, we examine how TREM2 affects the function of the brain immune cell populations in which it is expressed throughout disease progression to understand possible mechanisms underlying its differential impacts on pathology.

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Crossref · 10.1523/jneurosci.2110-16.2016

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Metadata

Authors
Jay, T. R., Hirsch, A. M., Broihier, M. L., Miller, C. M., Neilson, L. E., Ransohoff, R. M., Lamb, B. T., & Landreth, G. E.
Affiliations
  • Cleveland Clinic (US)
  • Case Western Reserve University (US)
  • Biogen (United States) (US)
  • Indiana University Indianapolis (US)
Venue
The Journal of Neuroscience
Published
2016-12-09
Volume
37
Issue
3
Pages
637-647
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2560062133
Cited by
457
References
38
Citations by year
2026: 26 · 2025: 42 · 2024: 52 · 2023: 54 · 2022: 43 · 2021: 51 · 2020: 61 · 2019: 40 · 2018: 57 · 2017: 31
FWCI
23.37
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • IUScholarWorks (Indiana University) (submittedVersion)
Funders
  • Alzheimer's Association (BFG-15-364590)
  • Cleveland Clinic
  • Case Western Reserve University
  • National Institutes of Health
  • National Institute on Aging (R01 AG050597, AG050597, F31AG048704, RF1AG051495, AG051495, RF1AG050597)
  • National Institute of Neurological Disorders and Stroke (T32NS067431)
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, Alzheimer's disease, neuroinflammation, amyloid plaques, myeloid cells, disease progression, TREM2 deficiency, myeloid cell proliferation
MeSH terms
Alzheimer Disease, Animals, Brain, Disease Models, Animal, Female, Humans, Male, Membrane Glycoproteins, Receptors, Immunologic, Mice, Knockout, Disease Progression, Mice

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