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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Dopamine-sensitive anticonvulsant site in the rat striatum.

The basal ganglia are involved in the organization of movement and function in the initiation and expression of generalized and limbic seizures. Dopamine is the principal neurotransmitter of the mesencephalic efferent pathways terminating in the mammalian striatum. No function has been ascribed to mesostriatal dopamine in the control of seizure spread in the brain. This work presents evidence that bilateral application of picomole amounts of apomorphine (a dopamine agonist) into the striatum confers protection against seizures produced by pilocarpine (a cholinergic agonist) in rats. The anticonvulsant effect of apomorphine is topographically confined to the caudate-putamen, nucleus accumbens, and olfactory tubercle. Bilateral application of nanomolar amounts of haloperidol (a dopamine antagonist) into the caudate-putamen or systemic application of haloperidol both lower the threshold for pilocarpine-induced seizures. Local application of an excitatory amino acid N-methyl-D-aspartate, into the substantia nigra pars compacta, ventral tegmental area, or retrorubral area, sites of origin of mesostriatal dopaminergic pathways, protects rats against seizures produced by pilocarpine. These results suggest that dopaminergic transmission in the striatum may be operative in complex neuronal networks modulating the seizure threshold.[1]

References

  1. Dopamine-sensitive anticonvulsant site in the rat striatum. Turski, L., Cavalheiro, E.A., Bortolotto, Z.A., Ikonomidou-Turski, C., Kleinrok, Z., Turski, W.A. J. Neurosci. (1988) [Pubmed]
 
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