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Related Experiment Video

Updated: Apr 26, 2026

Sequential Extraction of Soluble and Insoluble Alpha-Synuclein from Parkinsonian Brains
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Single-molecule detection methods to study alpha-synuclein aggregation in postmortem Parkinson's disease brains.

Emre Fertan1, John S H Danial1, Stephen Neame2

  • 1Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK; UK Dementia Research Institute at University of Cambridge, Cambridge CB2 0XY, UK.

Cell Reports Methods
|April 24, 2026
PubMed
Summary

Alpha-synuclein (ɑSyn) aggregates in Parkinson's disease (PD) form slowly in the brain. Larger aggregates are found in PD brains, with differences highlighted by specific extraction methods.

Keywords:
CP: imagingCP: neuroscienceDNA-PAINTSIMOATriton X-100data modelingdiffusible aggregateextractionmouse modelsarkosylsingle-molecule detectionsoluble aggregate

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Area of Science:

  • Neuroscience
  • Biochemistry

Background:

  • Nanoscopic aggregates of alpha-synuclein (ɑSyn) are implicated in Parkinson's disease (PD).
  • The in vivo mechanisms of small ɑSyn aggregate formation remain unclear.

Purpose of the Study:

  • To quantify and characterize ɑSyn aggregates in human PD brains and a mouse model.
  • To investigate the impact of different tissue processing methods on aggregate detection.

Main Methods:

  • Utilized ultra-sensitive single-molecule array (SIMOA) and super-resolution microscopy.
  • Analyzed ɑSyn aggregates from human brain samples and a mouse model of synucleinopathy.
  • Employed various tissue processing and extraction techniques.

Main Results:

  • No difference in aggregate numbers between PD and control samples.
  • Larger ɑSyn aggregates were detected in PD brain samples.
  • Diffusible and membrane-bound aggregates showed greater differences between disease and control groups.

Conclusions:

  • ɑSyn aggregation in the brain appears to be a slow process.
  • The formation of larger aggregates occurs in a subset of cells in PD.
  • Extraction methods significantly influence the detection of distinct ɑSyn aggregate subpopulations.