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Related Experiment Video

Updated: Jul 27, 2025

Presynapse Formation Assay Using Presynapse Organizer Beads and “Neuron Ball” Culture
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Accumulation of m

Lulu Jiang1, Rebecca Roberts1, Melissa Wong1

  • 1Department of Pharmacology, Physiology and Biophysics, Chobanian and Avedesian School of Medicine, Boston University, Boston, MA, 02118, USA.

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|June 9, 2023
PubMed
Summary
This summary is machine-generated.

A new mouse model exhibits key Alzheimer's disease (AD) pathologies, including amyloid plaques and tau tangles, offering a valuable tool for AD research. This model also shows elevated N6-methyladenosine (m6A) levels, a marker found in AD brains.

Keywords:
NeurodegenerationRNA binding proteinsRNA metabolismRNA methylationTIA1Tauopathyneuritic plaquesneuropathologystress granulestau fibrilstau oligomers

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Area of Science:

  • Neuroscience
  • Pathology
  • Genetics

Background:

  • Alzheimer's disease (AD) research is limited by a lack of animal models that fully replicate its complex pathologies.
  • Key AD hallmarks include extracellular beta-amyloid (Aβ) plaques, intracellular tau (MAPT) aggregation, neuroinflammation, and neurodegeneration.

Approach:

  • Development of a double transgenic mouse model (APPNL-G-F/MAPTP301S) to simultaneously study major AD pathologies.
  • Characterization of the model's pathological features at 6 months of age, including Aβ deposition, MAPT pathology, inflammation, and neurodegeneration.
  • Investigation of the role of N6-methyladenosine (m6A) accumulation and its associated enzymes (METTL3, ALKBH5) in the model.

Key Points:

  • The APPNL-G-F/MAPTP301S mouse model displays robust Aβ plaque accumulation, MAPT pathology, inflammation, and neurodegeneration by 6 months.
  • Aβ pathology potentiates MAPT pathology, inflammation, and neurodegeneration, while MAPT pathology does not affect Aβ levels.
  • Significant accumulation of N6-methyladenosine (m6A) is observed in neurons, astrocytes, and microglia, correlating with altered METTL3 and ALKBH5 enzyme levels.

Conclusions:

  • The APPNL-G-F/MAPTP301S mouse serves as a comprehensive preclinical model for Alzheimer's disease.
  • This model recapitulates critical AD pathologies and the recently identified m6A dysregulation, facilitating further investigation into AD pathogenesis and therapeutic strategies.