Cited by 114Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsDementia and Cognitive Impairment Research

TREM2 ectodomain and its soluble form in Alzheimer’s disease

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Yang, Jiaolong, Fu, Zhihui, Zhang, Xingyu, Xiong, Min, Meng, Lanxia, Zhang, Zhentao·2020·Journal of Neuroinflammation

Abstract

Triggering receptor expressed on myeloid cells 2 (TREM2) is a receptor mainly expressed on the surface of microglia. It mediates multiple pathophysiological processes in various diseases. Recently, TREM2 has been found to play a role in the development of Alzheimer's disease (AD). TREM2 is a transmembrane protein that is specifically expressed on microglia in the brain. It contains a long ectodomain that directly interacts with the extracellular environment to regulate microglial function. The ectodomain of TREM2 is processed by a disintegrin and metalloprotease, resulting in the release of a soluble form of TREM2 (sTREM2). Recent studies have demonstrated that sTREM2 is a bioactive molecule capable of binding ligands, activating microglia, and regulating immune responses during the AD continuum. Clinical studies revealed that sTREM2 level is elevated in cerebrospinal fluid (CSF) of AD patients, and the sTREM2 level is positively correlated with the levels of classical CSF biomarkers, namely t-tau and p-tau, indicating that it is a reliable predictor of the early stages of AD. Herein, we summarize the key results on the generation, structure, and function of sTREM2 to provide new insights into TREM2-related mechanisms underlying AD pathogenesis and to promote the development of TREM2-based therapeutic strategy.

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  • TREM2 receptor interaction plays a key role in identifying microglia for the build-up of debris and damage during the regulation of microglial activation.

    “TREM2 receptor interaction plays a key role in identifying microglia for the build-up of debris and damage during the regulation of microglial activation.”
  • TREM2 agonists are being investigated as potential therapeutic agents because they reduce inflammation and encourage amyloid-beta microglial phagocytosis.

    “TREM2 agonists are being investigated as potential therapeutic agents since they reduce inflammation and encourage amyloid-beta microglial phagocytosis [202,203,204,205].”
  • In the healthy aging human brain, amyloid-β plaques have the ability to cause persistent inflammation in microglia.

    “In the healthy aging human brain, amyloid-β plaques have the ability to cause persistent inflammation in microglia, which are the brain’s resident immune cells.”
  • Inflammation, or neuroinflammation, is a crucial factor in the mechanisms behind AD.

    “Inflammation, or neuroinflammation, is a crucial factor in the mechanisms behind AD.”

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Authors
Yang, J., Fu, Z., Zhang, X., Xiong, M., Meng, L., & Zhang, Z.
Affiliations
Renmin Hospital of Wuhan University (CN)
Corresponding author
Zhang, Zhentao
Venue
Journal of Neuroinflammation
Published
2020-07-07
Volume
17
Issue
1
Pages
204-204
ISSN
1742-2094 (ISSN-L)
OpenAlex
W3039674883
Cited by
113
References
129
Citations by year
2026: 12 · 2025: 11 · 2024: 32 · 2023: 23 · 2022: 19 · 2021: 16
FWCI
1.44
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroinflammation (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Natural Science Foundation of China (No.81822016,81771382, and 81571249)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
TREM2, soluble TREM2, Alzheimer's disease, microglia, extracellular domain, cerebrospinal fluid biomarkers, tau protein, early diagnosis, neuroinflammation
MeSH terms
Alzheimer Disease, Animals, Humans, Membrane Glycoproteins, Receptors, Immunologic, Solubility, Biomarkers, tau Proteins, Microglia, Protein Isoforms

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