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Related Experiment Videos

Neural expression profile of alpha-synuclein in developing human cortex.

T A Bayer1, P Jäkälä, T Hartmann

  • 1Department of Psychiatry, University of Bonn Medical Center, Germany.

Neuroreport
|October 8, 1999
PubMed
Summary
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Alpha-synuclein protein expression changes from the cell body to synapses during human brain development. This developmental pattern is also observed in neurodegenerative conditions like Down's syndrome and Alzheimer's disease.

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Molecular Biology

Background:

  • Alpha-synuclein is a neuronal presynaptic protein crucial for synaptogenesis and central nervous system (CNS) development.
  • Understanding its developmental expression is key to comprehending normal brain maturation and neurodegenerative processes.

Purpose of the Study:

  • To investigate the human developmental expression profile of alpha-synuclein.
  • To compare the expression patterns in normal development versus neurodegenerative disorders.

Main Methods:

  • Utilized a polyclonal antiserum targeting the NAC domain of alpha-synuclein.
  • Employed immunohistochemistry on fetal and adult brain tissues.
  • Performed Reverse Transcription Polymerase Chain Reaction (RT-PCR) and Western blot analyses.

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Main Results:

  • Observed somatic staining in fetal neuroectodermal precursor cells, shifting to a synaptic pattern in adult cortex.
  • Identified similar intraneuronal redistribution patterns in fetal (Trisomy 21) and adult (Down syndrome, Alzheimer's disease) brains.
  • Confirmed alpha-synuclein expression throughout human brain development (4-7.5 months) via RT-PCR and Western blot.

Conclusions:

  • Alpha-synuclein undergoes a significant developmental redistribution from the soma to synapses in the human brain.
  • This developmental expression pattern is recapitulated in neurodegenerative diseases, suggesting a role in disease pathogenesis.
  • Alpha-synuclein is expressed throughout human brain development.