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Antidystonic efficacy of γ-aminobutyric acid uptake inhibitors in the dt sz mutant

European Journal of Pharmacology, ISSN: 0014-2999, Vol: 521, Issue: 1, Page: 95-98
2005
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Article Description

In the dt sz mutant hamster, a model of paroxysmal dyskinesia in which dystonic episodes occur in response to stress, previous studies suggested that retarded development of γ-aminobutyric acid (GABA)ergic inhibition plays a critical role in the pathogenesis. In the present study, we therefore examined the effects of selective GABA uptake inhibitors on severity of dystonia in dt sz hamsters. R(-) N -(4,4-di(3-methylthien-2-yl)-but-3-enyl) nipecotic acid hydrochloride (tiagabine, 5–20 mg/kg i.p.) and 1-[2-[[(diphenylmethylene) imino]oxy]ethyl]-1,2,5,6-tetrahydro-3-pyridinecarboxylic acid hydrochloride (NNC-711, 1–10 mg/kg i.p.) significantly reduced the severity of dystonia. These data suggest that GABA uptake inhibitors may provide novel therapeutic approaches for paroxysmal dyskinesias.

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