The Dopaminergic Dysfunction and Altered Working Memory Performance of Aging Mice Lacking Gamma-synuclein Gene
Viktor S Kokhan1, Tat Yana G Kokhan2, Anna N Samsonova3
1Institute of Biomedical Problems RAS, Moscow, Russian Federation.
Background:
It was previously shown that inactivation of gamma-synuclein which is a small soluble neuronal protein affects psycho-emotional status and cognitive abilities in knock-out mice.
Objective:
Determine the role of gamma-synuclein inactivation on memory performance in aging animals.
Method:
We used the passive avoidance test and acute amphetamine administration in aging gammasynuclein knock-out mice.
Results:
As a result, we found moderate aging-unlinked deficit of dopaminergic neurotransmitter system of gamma-synuclein knock-out mice. At the same time, the evidence of progressive synaptic vesicle trafficking machinery impairment was obtained.
Conclusion:
Therefore most likely these dysfunctions are associated with a reduction in the highefficient learning performance in tests that require intact working memory.
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