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Endogenous Alpha-Synuclein Protein Analysis from Human Brain Tissues Using Single-Molecule Pull-Down Assay.

Goun Je1, Benjamin Croop2, Sambuddha Basu1

  • 1Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida , Orlando, Florida 32827, United States.

Analytical Chemistry
|November 28, 2017
PubMed
Summary

Researchers developed a new assay to count alpha-synuclein (α-SYN) proteins and study their forms in brain samples. This method aids in diagnosing neurodegenerative diseases like Parkinson's and Alzheimer's.

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Molecular Biology

Background:

  • Alpha-synuclein (α-SYN) is implicated in Parkinson's disease pathogenesis.
  • Understanding endogenous α-SYN in human brains is limited by current methods and sample availability.

Purpose of the Study:

  • To develop a novel method for quantifying α-SYN and assessing its native oligomerization states.
  • To enable the study of α-SYN in human postmortem brain samples.

Main Methods:

  • Development of the alpha-synuclein single-molecule pull-down (α-SYN SiMPull) assay.
  • Integration of in vivo protein crosslinking with the SiMPull assay.
  • Application to biological samples, including human postmortem brains.

Main Results:

  • The α-SYN SiMPull assay allows for the counting of individual α-SYN proteins.
  • The assay can assess the native oligomerization states of α-SYN.
  • Successful application to human postmortem brain tissue.

Conclusions:

  • The developed α-SYN SiMPull assay is a powerful tool for studying α-SYN.
  • This method can advance the understanding of α-SYN in neurodegenerative diseases.
  • The assay has potential diagnostic applications for Parkinson's and Alzheimer's diseases.