Abstract
Introduction: Alzheimer's disease (AD) is a devastating condition with no effective treatments, with promising findings in rodents failing to translate into successful therapies for patients. Methods: Targeting the vulnerable entorhinal cortex (ERC), rhesus monkeys received two injections of an adeno-associated virus expressing a double tau mutation (AAV-P301L/S320F) in the left hemisphere, and control AAV-green fluorescent protein in the right ERC. Noninjected aged-matched monkeys served as additional controls. Results: Within 3 months we observed evidence of misfolded tau propagation, similar to what is hypothesized to occur in humans. Viral delivery of human 4R-tau also coaptates monkey 3R-tau via permissive templating. Tau spreading is accompanied by robust neuroinflammatory response driven by TREM2+ microglia, with biomarkers of inflammation and neuronal loss in the cerebrospinal fluid and plasma. Discussion: These results highlight the initial stages of tau seeding and propagation in a primate model, a more powerful translational approach for the development of new therapies for AD.
Original language | English |
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Pages (from-to) | 933-945 |
Number of pages | 13 |
Journal | Alzheimer's and Dementia |
Volume | 17 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2021 |
Externally published | Yes |
Keywords
- Alzheimer's Disease
- biomarkers
- inflammation
- microglia
- rhesus monkey
- tau