Journal
CELL REPORTS
Volume 29, Issue 9, Pages 2862-+Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2019.10.089
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Funding
- Deutsche Forschungsgemeinschaft (DFG) Emmy Noether Research Group [DA 1657/2-1, GRK 1789]
- Junior Professorship Program Baden-Wuerttemberg
- FWF [SFB F-44, DFG LI-1745/1]
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Intracellular accumulation of alpha-synuclein (alpha-syn) and formation of Lewy bodies are neuropathological characteristics of Parkinson's disease (PD) and related alpha-synucleinopathies. Oligomerization and spreading of alpha-syn from neuron to neuron have been suggested as key events contributing to the progression of PD. To directly visualize and characterize alpha-syn oligomerization and spreading in vivo, we generated two independent conditional transgenic mouse models based on alpha-syn protein complementation assays using neuron-specifically expressed split Gaussia luciferase or split Venus yellow fluorescent protein (YFP). These transgenic mice allow direct assessment of the quantity and subcellular distribution of alpha-syn oligomers in vivo. Using these mouse models, we demonstrate an age-dependent accumulation of a specific subtype of alpha-syn oligomers. We provide in vivo evidence that, although alpha-syn is found throughout neurons, alpha-syn oligomerization takes place at the presynapse. Furthermore, our mouse models provide strong evidence for a transsynaptic cell-to-cell transfer of de novo generated a-syn oligomers in vivo.
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