Abstract
Hippocampal synaptic plasticity was studied in transgenic mice over-expressing human α-synuclein containing the A30P Parkinson's disease mutation. Medial perforant path-dentate granule cell synapses showed enhanced paired-pulse depression (PPD) for short interpulse intervals (< 200 ms), without differences in basal transmission. Extracellular calcium reduction failed to rescue the enhanced PPD. Paired-pulse facilitation in the CAI region was normal in slices from transgenic mice, but enhanced synaptic depression was revealed upon repetitive stimulation of the Schaffer collaterals. Long-term potentiation in the CAI field was not impaired in slices from transgenic mice. These results suggest that mutant α-synuclein accumulation impairs short-term changes in synaptic strength when neurotransmitter availability is limited due to enhanced release probability or repetitive synaptic activity.
Original language | English (US) |
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Pages (from-to) | 219-223 |
Number of pages | 5 |
Journal | Neuroreport |
Volume | 14 |
Issue number | 2 |
DOIs | |
State | Published - Feb 10 2003 |
Keywords
- Brain slices
- Field potential
- Hippocampus
- Parkinson's disease
- Synaptic plasticity
- Transgenic
- α-synuclein