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  • Title: Comparative effects of chronic haloperidol and sulpiride treatment on nigral and striatal GABA content.
    Author: Nicoletti F, Patti F, Condorelli DF, Rampello L, Giammona G, Di Giorgio RM, Canonico PL, Scapagnini U.
    Journal: J Neurochem; 1981 Oct; 37(4):1048-51. PubMed ID: 7320718.
    Abstract:
    Nigral and striatal GABA contents were assayed in male rats treated chronically with haloperidol or sulpiride, two dopamine-receptor blocking agents that have different neuropharmacological spectra in regard to their biochemical, behavioural, and clinical properties. No great difference was observed between the chronic effects of haloperidol and sulpiride on nigral and striatal GABA content. However, low doses (30 micrograms/kg, intraperitoneally) of the dopamine-receptor agonist apomorphine, injected 12 h after the discontinuation of chronic haloperidol or chronic sulpiride treatment, induced opposite changes in nigral GABA levels suggesting the existence of a different "status" of the dopamine receptors during the 12 h-period following the withdrawal of haloperidol or sulpiride.
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