The abstract is read at the publisher; the summary is JClub's.
Aggregation-prone tau variants expressed in the mouse dentate gyrus via AAV are linked to greater trans-synaptic tau spreading than wild-type tau, with higher tau in extracellular vesicles.
- Why it matters: Tau pathology progresses along connected brain circuits, but it remains unclear whether aggregated or soluble tau forms drive spread and how microglia and extracellular vesicles participate.
- What they did: The study used AAV-mediated gene transfer to overexpress distinct tau forms plus a reporter in mouse dentate gyrus, then quantified contralateral hippocampal tau-positive neurons using contralateral projections and assessed microglial morphology and extracellular vesicle tau levels.
- The result: Vector-derived tau was detected in non-transduced neurons, validating propagation readouts; aggregation-prone variants were associated with more contralateral tau-positive neurons than wild-type, and extracellular vesicles from aggregated-tau brains contained higher tau protein, supporting a role for advanced-stage aggregates and extracellular vesicles.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.