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Assessment of Sensorimotor Function in Mouse Models of Parkinson's Disease
Published on: June 17, 2013
Mice lacking alpha-synuclein display functional deficits in the nigrostriatal dopamine system
A Abeliovich1, Y Schmitz, I Fariñas
1Department of Neurology, University of California, San Francisco 94143, USA.
Neuron
|March 9, 2000
Summary
Alpha-synuclein (alpha-Syn) knockout mice show altered dopamine release and reduced motor response, suggesting alpha-Syn regulates dopamine neurotransmission. This research sheds light on Parkinson's disease mechanisms.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Alpha-synuclein (alpha-Syn) is implicated in Parkinson's disease (PD) pathophysiology.
- The precise function of alpha-Syn in dopamine (DA) neurotransmission remains unclear.
Purpose of the Study:
- To investigate the role of alpha-Syn in regulating dopamine release and motor function.
- To determine if alpha-Syn is essential for normal dopaminergic neurotransmission.
Main Methods:
- Generation and analysis of alpha-synuclein knockout (alpha-Syn-/-) mice.
- Electrophysiological assessment of dopamine release in nigrostriatal terminals.
- Measurement of striatal dopamine levels and amphetamine-induced locomotor activity.
Main Results:
- Alpha-Syn-/- mice are viable with normal brain architecture and dopaminergic systems.
- Paired-pulse stimulation revealed increased DA release in alpha-Syn-/- mice, mimicking elevated Ca2+.
- Striatal DA levels and amphetamine-induced locomotion were reduced in alpha-Syn-/- mice.
Conclusions:
- Alpha-synuclein acts as a presynaptic, activity-dependent negative regulator of dopamine neurotransmission.
- These findings provide insights into the role of alpha-Syn in PD pathogenesis.
