Cited by 105Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsInflammasome and immune disorders

The triggering receptor expressed on myeloid cells 2 ( TREM2 ) is associated with enhanced inflammation, neuropathological lesions and increased risk for Alzheimer's dementia

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Roussos, Panos, Katsel, Pavel, Fam, Peter, Tan, Weilun, Purohit, Dushyant P., Haroutunian, Vahram·2015·Alzheimer's & Dementia

Abstract

Introduction: The objective of this study was to elucidate the relationship between the triggering receptor expressed on myeloid cells 2 ( TREM2 ) risk variant, neuropathological lesions, alterations in gene and protein expression, and the severity of neuroinflammation. Methods: The genetic association study of the R47 H TREM2 variant with Alzheimer's disease (AD), neuropathology, and changes in TREM2 and TYRO protein tyrosine kinase‐binding protein ( TYROBP) gene and protein expression, and neuroinflammatory markers. Results: The TREM2 variant is associated with: (i) AD (odds ratio: 4.76; P = .014); (ii) increased density of amyloid plaques and neurofibrillary tangles in multiple brain regions; (iii) increased TREM2 ( P = .041) and TYROBP ( P = .006) gene expression; (iv) decreased TREM2 protein levels ( P = .016); and (v) upregulation of proinflammatory cytokines (regulated on activation, normal T cell expressed and secreted [RANTES] and interferon [IFN] gamma) ( P = .003) and nominal downregulation of protective markers (α2‐macroglobulin, interleukin 4 or IL‐4, and ApoA1) ( P = .018). Discussion: These findings link the TREM2 missense mutation with specific molecular abnormalities and increases in neuropathological lesions in the human brain.

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Crossref · 10.1016/j.jalz.2014.10.013

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  • Roussos et al. reported higher TREM2 gene expression in Alzheimer's disease R47H carriers relative to controls and no difference in TREM2 between Alzheimer's disease noncarriers and control.

    “They also reported higher TREM2 gene expression in AD R47H carriers relative to controls and no difference in TREM2 between AD noncarriers and control.”

    From Markers of microglia in post-mortem brain samples from patients with Alzheimer’s disease: a systematic review (2018) · cites this paper as [107]

    Results §3.4 reports significantly higher TREM2 gene expression in AD R47H carriers than in controls. It does not explicitly report no difference between AD noncarriers and controls; the Discussion (§4) instead describes noncarriers as showing intermediate changes in expression. (LLM, conf=0.84)

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  • Roussos et al. protein measurements indicated decreased TREM2 in Alzheimer's disease R47H carriers relative to controls with no difference between Alzheimer's disease noncarriers and control.

    “Their protein measurements, however, indicated decreased TREM2 in AD R47H carriers relative to controls with no difference between AD noncarriers and control.”

    From Markers of microglia in post-mortem brain samples from patients with Alzheimer’s disease: a systematic review (2018) · cites this paper as [107]

    Results §3.5 reports higher TREM2 protein in controls than in AD R47H carriers (P = 0.014), supporting the first comparison. It does not report a TREM2 comparison between AD noncarriers and controls, so the claimed absence of a difference is not established by our copy. Page numbers were not available. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Several other TREM2 variants (R62H, T66M, H157Y, D87N) increase the risk of AD.

    “Several other TREM2 variants that affect the expression of TREM2 also increased the risk of AD, including R62H, T66M, H157Y, and D87N.”

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Research works printed but not linked: 1

  1. [9]Rajagopalan P Hibar DP Thompson PM TREM2 and neurodegenerative disease The New England journal of medicine 2013 369 1565 7 24131186 PMC4024453

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Authors
Roussos, P., Katsel, P., Fam, P., Tan, W., Purohit, D. P., & Haroutunian, V.
Affiliations
  • New York/New Jersey VA Health Care Network (US)
  • Icahn School of Medicine at Mount Sinai (US)
Corresponding author
Haroutunian, Vahram
Venue
Alzheimer's & Dementia
Publisher
Wiley
Published
2014-12-09
Volume
11
Issue
10
Pages
1163-1170
ISSN
  • 1552-5260 (ISSN-L)
  • 1552-5279
OpenAlex
W2102675610
Cited by
103
References
52
Citations by year
2026: 7 · 2025: 8 · 2024: 11 · 2023: 8 · 2022: 18 · 2021: 8 · 2020: 6 · 2019: 9 · 2018: 9 · 2017: 9 · 2016: 7 · 2015: 3
FWCI
3.30
Type
journal article
Language
en
Open access
Locations
  • Alzheimer s & Dementia (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health (P01‐AG02219, P50‐AG05138, MH066392)
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
TREM2, Alzheimer's disease
MeSH terms
Alzheimer Disease, Brain, Female, Humans, Inflammation, Membrane Glycoproteins, Receptors, Immunologic, Risk, Interleukin-4, Gene Expression, Case-Control Studies, Mutation, Missense, Myeloid Cells, Apolipoprotein E4, Genetic Association Studies, Plaque, Amyloid

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