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TREM2 and Amyloid Beta: A Love-Hate Relationship.

Joe Udeochu1, Faten A Sayed2, Li Gan3

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Triggering receptor expressed on myeloid cells 2 (TREM2) mutations heighten Alzheimer's disease (AD) risk. TREM2 binds amyloid-beta (Aβ) for enhanced clearance, and its expression improves AD-related deficits in mouse models.

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Area of Science:

  • Neuroscience
  • Immunology
  • Genetics

Background:

  • Genetic mutations in TREM2 (triggering receptor expressed on myeloid cells 2) are linked to an increased risk of developing late-onset Alzheimer's disease (AD).
  • The precise mechanisms by which TREM2 influences AD pathogenesis remain under investigation.

Purpose of the Study:

  • To elucidate the role of TREM2 in the clearance of amyloid-beta (Aβ) pathology.
  • To evaluate the therapeutic potential of TREM2 modulation in Alzheimer's disease models.

Main Methods:

  • Biochemical assays to assess the binding interaction between TREM2 and Aβ.
  • Studies involving genetically modified mouse models expressing human TREM2 in the context of AD pathology.

Main Results:

  • TREM2 directly binds to aggregated forms of Aβ, facilitating its clearance.
  • Enhanced expression of human TREM2 in AD mouse models significantly reduced Aβ plaque burden and ameliorated associated cognitive and behavioral deficits.

Conclusions:

  • TREM2 plays a critical role in the brain's immune response to AD by mediating Aβ clearance.
  • Targeting TREM2 represents a promising therapeutic strategy for Alzheimer's disease.