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Bimolecular Fluorescence Complementation
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Quantification of Protein Aggregates Using Bimolecular Fluorescence Complementation.

Vibha Prasad1, Aaron Voigt2,3

  • 1Department of Neurology, University Medical Center, RWTH Aachen University, Aachen, 52074, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|October 21, 2018
PubMed
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This study developed a fast and inexpensive in vivo assay using Drosophila to measure α-synuclein aggregation, crucial for understanding Parkinson's disease and related synucleinopathies.

Keywords:
BiFCFilter Retardation assayNeurodegenerationProtein aggregation

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Genetics

Background:

  • α-synuclein aggregation in neurons is a hallmark of Parkinson's disease (PD) and other synucleinopathies.
  • The in vivo mechanisms and toxic species (soluble oligomers vs. insoluble fibrils) of α-synuclein aggregation remain poorly understood.
  • Existing in vitro research limits understanding of aggregation within a living organism.

Purpose of the Study:

  • To develop and validate a novel in vivo assay for quantifying α-synuclein aggregation.
  • To differentiate and measure both soluble and insoluble α-synuclein aggregates in a living system.
  • To provide a versatile platform for screening compounds affecting protein aggregation.

Main Methods:

  • Utilized Drosophila melanogaster as a genetic model organism.
  • Employed bimolecular fluorescence complementation (BiFC) to detect soluble α-synuclein aggregates (oligomers).
  • Applied filter retardation assay to detect insoluble α-synuclein aggregates (fibrils).

Main Results:

  • Successfully developed and verified an easy, inexpensive, fast, and sensitive in vivo assay for α-synuclein aggregation.
  • The assay can distinguish and quantify soluble oligomers and insoluble fibrils.
  • The methodology is suitable for large-scale screening of compounds impacting α-synuclein aggregation.

Conclusions:

  • The developed Drosophila assay provides a robust tool for in vivo analysis of α-synuclein aggregation.
  • This assay is ideal for identifying potential therapeutic compounds for synucleinopathies.
  • The experimental framework can be adapted to study aggregation of other disease-associated proteins.