Intercellular Signaling Pathways as Therapeutic Targets for Vascular Dementia Repair.

Area of Science:

• Neuroscience
• Cell Biology
• Genomics

Background:

• Vascular dementia (VaD) is a significant cause of dementia, characterized by white matter ischemic damage and lacking direct treatments.
• Cell-cell interactions at lesion sites critically influence disease progression or repair in VaD.
• Understanding intercellular signaling is crucial for developing effective VaD therapies.

Approach:

• Developed a VaD mouse model for transcriptomic and functional analysis.
• Integrated mouse VaD transcriptome data with human VaD single-nucleus RNA sequencing (snRNA-Seq) data.
• Utilized a custom ligand-receptor (L-R) interaction database to identify conserved dysregulated pathways in human and mouse VaD.

Key Points:

• Identified shared altered intercellular signaling pathways between human and mouse VaD models.
• Focused on two specific L-R systems, Serpine2-Lrp1 and CD39-A3AR, which were dysregulated in VaD.
• Demonstrated that decreased Serpine2 enhances oligodendrocyte precursor cell (OPC) differentiation, promoting VaD repair.
• Showed that a drug targeting CD39-A3AR function improved tissue and behavioral recovery in a VaD mouse model.

Conclusions:

• Novel intercellular signaling targets for VaD have been identified.
• The findings suggest potential new therapeutic strategies for vascular dementia.
• Targeting specific ligand-receptor interactions may facilitate brain repair and functional recovery in VaD.