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Related Experiment Videos

Phosphorylated alpha-synuclein in normal mouse brain.

Yu Hirai1, Shinobu C Fujita, Takeshi Iwatsubo

  • 1Mitsubishi Kagaku Institute of Life Sciences, 11 Minamiooya, Machida, Tokyo 194-8511, Japan.

FEBS Letters
|August 12, 2004
PubMed
Summary

Cold water stress temporarily reduces alpha-synuclein phosphorylation at Ser129 in mouse brains, particularly in the striatum. This stress response is less pronounced in aged mice, suggesting relevance to Parkinson's disease pathogenesis.

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Area of Science:

  • Neuroscience
  • Biochemistry

Background:

  • Alpha-synuclein phosphorylated at Ser129 is a key component of Lewy bodies found in Parkinson's disease and related disorders.
  • Understanding alpha-synuclein regulation is crucial for elucidating neurodegenerative disease mechanisms.

Purpose of the Study:

  • To investigate the impact of acute physiological stress (cold water) on alpha-synuclein phosphorylation at Ser129 in vivo.
  • To examine regional differences and age-dependent alterations in this stress response within the mouse brain.

Main Methods:

  • Quantitative immunoblotting was employed to measure alpha-synuclein phosphorylation levels at Ser129.
  • Mouse brains were subjected to a standardized cold water stress protocol.

Main Results:

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  • Basal alpha-synuclein phosphorylation at Ser129 was significantly higher in the striatum compared to the hippocampus.
  • Cold water stress induced a rapid decrease in phosphorylation, most notably in the striatum, with recovery over several hours.
  • Aged mice exhibited a diminished stress-induced dephosphorylation response in the striatum.

    • Conclusions:

    • Alpha-synuclein phosphorylation at Ser129 is dynamically regulated by physiological stimuli in vivo.
    • The striatum shows a prominent and age-sensitive response to stress, potentially linking to Parkinson's disease pathogenesis.