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12:01
Detection of Disease-associated α-synuclein by Enhanced ELISA in the Brain of Transgenic Mice Overexpressing Human A53T Mutated α-synuclein
Published on: May 30, 2015
Testosterone regulates alpha-synuclein mRNA in the avian song system
V N Hartman1, M A Miller, D F Clayton
1Graduate Program in Neurobiology and Behavior, University of Washington, Seattle, USA.
Neuroreport
|April 17, 2001
Summary
Testosterone increases alpha-synuclein (a protein linked to neurodegenerative diseases) mRNA expression and brain nucleus volume in songbirds. This study reveals steroid hormone regulation of synuclein gene expression.
Area of Science:
- Neuroscience
- Molecular Biology
- Behavioral Endocrinology
Background:
- Alpha-synuclein is a conserved protein implicated in neurodegenerative diseases.
- The avian song system, crucial for vocal learning, is a model for studying brain plasticity.
- Sex steroids are known to influence song learning and brain development.
Purpose of the Study:
- To investigate the effect of testosterone on alpha-synuclein mRNA expression in the avian song control system.
- To determine if testosterone influences the volume of song control nuclei.
Main Methods:
- Adult male chipping sparrows were treated with testosterone or placebo implants.
- Alpha-synuclein mRNA levels were quantified using RT-qPCR.
- Volume of the song control nucleus Area X was measured.
Main Results:
- Exogenous testosterone significantly upregulated alpha-synuclein mRNA expression.
- Testosterone treatment led to a notable increase in the volume of Area X.
- This is the first demonstration of steroid regulation of synuclein gene expression.
Conclusions:
- Testosterone dynamically regulates alpha-synuclein expression in the song control system.
- These findings suggest a potential role for alpha-synuclein in steroid-mediated neuroplasticity.
- The avian song system provides a novel model for studying synuclein regulation.
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