| Literature DB >> 10707987 |
A Abeliovich1, Y Schmitz, I Fariñas, D Choi-Lundberg, W H Ho, P E Castillo, N Shinsky, J M Verdugo, M Armanini, A Ryan, M Hynes, H Phillips, D Sulzer, A Rosenthal.
Abstract
alpha-Synuclein (alpha-Syn) is a 14 kDa protein of unknown function that has been implicated in the pathophysiology of Parkinson's disease (PD). Here, we show that alpha-Syn-/- mice are viable and fertile, exhibit intact brain architecture, and possess a normal complement of dopaminergic cell bodies, fibers, and synapses. Nigrostriatal terminals of alpha-Syn-/- mice display a standard pattern of dopamine (DA) discharge and reuptake in response to simple electrical stimulation. However, they exhibit an increased release with paired stimuli that can be mimicked by elevated Ca2+. Concurrent with the altered DA release, alpha-Syn-/- mice display a reduction in striatal DA and an attenuation of DA-dependent locomotor response to amphetamine. These findings support the hypothesis that alpha-Syn is an essential presynaptic, activity-dependent negative regulator of DA neurotransmission.Entities:
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Year: 2000 PMID： 10707987 DOI： 10.1016/s0896-6273(00)80886-7
Source DB: PubMed Journal: Neuron ISSN： 0896-6273 Impact factor: 17.173