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Alpha-synuclein fragments trigger distinct aggregation pathways.

Tasnim Chakroun1,2, Valentin Evsyukov1,3, Niko-Petteri Nykänen1

  • 1Department of Translational Neurodegeneration, German Center for Neurodegenerative Diseases (DZNE), 81377, Munich, Germany.

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|February 5, 2020
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Summary
This summary is machine-generated.

Alpha-synuclein (αSyn) fragments are key drivers of synucleinopathy. Specific αSyn fragments (1-95 and 61-140) spread intercellularly, form toxic aggregates, and influence disease pathways.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Biochemistry

Background:

  • Alpha-synuclein (αSyn) aggregation is central to synucleinopathies.
  • Various αSyn species, including cleaved forms, complicate therapeutic targeting.

Purpose of the Study:

  • To investigate the role of αSyn fragments in intercellular spreading.
  • To identify specific αSyn fragments involved in disease pathogenesis.

Main Methods:

  • Comparative and proof-of-principle approaches were used.
  • Assessed the ability of αSyn fragments to instigate aggregation of endogenous αSyn.

Main Results:

  • Two αSyn fragments (1-95 and 61-140) were identified as spreading species.
  • These fragments induced proteinase-K-resistant aggregates and cellular toxicity.
  • Aggregates were detectable only by specific antibodies, suggesting distinct strain formation.

Conclusions:

  • αSyn fragments are critical for intercellular spreading and aggregation.
  • Fragments influence aggregation pathways, leading to differential strain formation.
  • Targeting αSyn fragments may offer novel therapeutic strategies for synucleinopathies.