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Updated: Feb 14, 2026
08:24
A Method to Study α-Synuclein Toxicity and Aggregation Using a Humanized Yeast Model
Published on: November 25, 2022
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α-Synuclein Oligomers Induce a Unique Toxic Tau Strain
Diana L Castillo-Carranza1, Marcos J Guerrero-Muñoz1, Urmi Sengupta1
1Mitchell Center for Neurodegenerative Diseases, University of Texas Medical Branch, Galveston, Texas; Departments of Neurology, Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, Texas.
Biological Psychiatry
|February 27, 2018
Summary
Alpha-synuclein (α-synuclein) seeds toxic tau aggregates, accelerating neurodegeneration. This study shows α-synuclein enhances tau
Area of Science:
- Neuroscience
- Biochemistry
- Pathology
Background:
- Co-occurrence of alpha-synuclein (α-synuclein) and tau aggregates in neurodegenerative diseases like Parkinson's and Alzheimer's suggests a potential seeding mechanism.
- Investigating the interplay between α-synuclein and tau is crucial for understanding disease progression in these disorders.
Purpose of the Study:
- To elucidate the role of α-synuclein in the tau aggregation pathway.
- To determine if α-synuclein can seed and influence tau aggregation in vitro and in vivo.
Main Methods:
- Experiments utilized recombinant and brain-derived tau and α-synuclein oligomers.
- Monomeric tau aggregation was seeded in vitro and in vivo using isolated tau and α-synuclein/tau oligomer complexes.
- Brain-derived oligomers from progressive supranuclear palsy and Parkinson's disease patients were injected into Htau mice.
Main Results:
- α-synuclein induced a unique toxic tau oligomeric strain that inhibited fibril formation.
- In vivo, Parkinson's disease-derived α-synuclein/tau oligomers accelerated endogenous tau oligomer formation in Htau mouse brains.
- Accelerated tau oligomer formation correlated with increased neuronal cell loss.
Conclusions:
- This study provides the first evidence that α-synuclein exacerbates the detrimental effects of tau.
- α-synuclein's interaction with tau contributes significantly to the progression of neurodegenerative diseases.
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