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Updated: Jan 7, 2026
05:10
Drug Repurposing Hypothesis Generation Using the "RE:fine Drugs" System
Published on: December 11, 2016
10.1K
Drug Development
Robert R Butler1, Tao Yang1, Crystal Han1
1Stanford University, Stanford, CA, USA.
Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 25, 2025
Summary
LM11A-31 (C31) treatment in tauopathy models partially reverses disrupted neuronal-glial communication by modulating Apoe signaling and glial receptor activity. This suggests C31 has therapeutic potential for neurodegenerative diseases.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Tau pathology drives neurodegeneration in Alzheimer's Disease (AD).
- LM11A-31 (C31), a p75 neurotrophin receptor (p75NTR) modulator, reduces tau accumulation and synaptic damage.
- C31's impact on neuronal-glial communication is not fully understood.
Purpose of the Study:
- Investigate C31's long-term effects on synaptic-glial communication in tauopathy.
- Utilize single-nucleus RNA sequencing (snRNA-seq) and spatial transcriptomics to analyze neuronal-glial interactions.
Main Methods:
- Administered C31 or vehicle to Tau P301S (PS19) and wildtype (Wt) mice for 3 months.
- Performed snRNA-seq and CosMx spatial molecular imaging on mouse cortex.
- Analyzed cell-to-cell communication using Liana for ligand-receptor (LR) interactions.
Main Results:
- Astrocytes and microglia showed genotype/drug-dependent LR interactions with glutamatergic neurons.
- Glial cells received Apoe signaling from neurons via lipoprotein receptors, elevated in PS19 mice but reduced by C31.
- Astrocytes showed enriched extracellular matrix signaling; microglia displayed altered LR activity involving p75NTR co-receptor Sort1 and Ntrk2.
Conclusions:
- Tauopathy disrupts neuronal-glial communication.
- C31 treatment ameliorates this crosstalk, potentially via direct microglial engagement.
- C31 shows therapeutic potential for neurodegenerative diseases by influencing synaptic integrity and glial communication.
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