Clinical Report: Intranasal EVs may slow Alzheimer's disease
Overview
Extracellular vesicles derived from human amniotic mesenchymal stromal cells (hAMSC-EVs) were evaluated in preclinical models of Alzheimer's disease. The study reported cognitive improvements and reductions in amyloid-beta accumulation in treated mice compared to controls.
Background
Alzheimer's disease (AD) is a progressive neurodegenerative disorder characterized by cognitive decline and the accumulation of amyloid-beta plaques and tau tangles. Current treatment options are limited.
Data Highlights
| Outcome | hAMSC-EV Group | Vehicle Group |
|---|---|---|
| Novel Object Recognition Preference Index | 63% | 55% |
| Object Place Recognition Preference Index | 61% | 54% |
| Y-Maze Spontaneous Alternation | 63% | 55% |
| Amyloid-beta Concentration | 2,744 pg/mg | 4,713 pg/mg |
Key Findings
- hAMSC-EVs improved cognitive performance in triple-transgenic AD mice.
- Treatment reduced hippocampal amyloid-beta levels by 53%.
- hAMSC-EVs decreased neuroinflammation, evidenced by lower microglial and astrocytic density.
- RNA cargo from hAMSC-EVs contributed to immunomodulatory effects in activated microglia.
- In human-derived neurons, hAMSC-EVs prevented neurite atrophy and restored synaptic proteins.
Clinical Implications
Further studies are necessary to explore the clinical efficacy and optimize treatment protocols.
Conclusion
This study provides evidence that hAMSC-EVs may have effects in Alzheimer's disease models.
Related Resources & Content
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- The Alzheimer's Association clinical practice guideline for the Diagnostic Evaluation, Testing, Counseling, and Disclosure of Suspected Alzheimer's Disease and Related Disorders (DETeCD‐ADRD): Executive summary of recommendations for specialty care - Dickerson - 2025 - Alzheimer's & Dementia - Wiley Online Library
- Lecanemab in Early Alzheimer’s Disease | New England Journal of Medicine
- Human amniotic mesenchymal stromal cell-derived extracellular vesicles reprogram microglia and prevent neurodegeneration in experimental models of Alzheimer’s disease | Translational Neurodegeneration | Springer Nature Link
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