Mar 1, 1985

Mesolimbic and striatal dopamine receptor supersensitivity: prophylactic and reversal effects of L-prolyl-L-leucyl-glycinamide (PLG)

Peptides
P ChiuR K Mishra

Abstract

Functional supersensitivity of mesolimbic and striatal dopamine receptors has been suggested to contribute to the pathogenesis of schizophrenia and tardive dyskinesia. Using the rodent model of chronic administration of the neuroleptic haloperidol, we investigated the possible desensitizing effects of a tripeptide structurally unrelated to dopamine agonists, L-prolyl-L-leucyl-glycinamide (PLG) on mesolimbic and striatal dopaminergic receptor supersensitivity. Administration of PLG either prior to or after chronic haloperidol, inhibited the supersensitivity of dopamine receptors. The results have implications for pharmacological intervention in preventing tardive dyskinesia and relapse psychosis of schizophrenia.

Mentioned in this Paper

Striatonigral Degeneration, Infantile (Disorder)
Pathogenic Aspects
Dopamine Agonists [MoA]
Limbic System
Pathogenesis
Assay OF Haloperidol
Lingual-Facial-Buccal Dyskinesia
Schizophrenia
August Rats
Congenital Abnormal Synostosis

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