The dopaminergic stabilizers (-)-OSU6162 and ACR16 reverse (+)-MK-801-induced social withdrawal in rats.

Abstract	Schizophrenia is manifested by positive and negative symptoms, as well as cognitive deficits. Most existing antipsychotic agents have poor effects on the negative symptoms of schizophrenia, thus emphasizing the necessity for developing new antipsychotic treatments. Dopaminergic stabilizers constitute one of the latest novelties in the quest for new antipsychotic drugs. Social withdrawal in rats, in response to treatment with NMDA-receptor antagonists such as (+)-MK-801, may be used to model negative symptoms. In this study we aimed to evaluate the dopaminergic stabilizers (-)-OSU6162 and ACR16, compared to haloperidol and clozapine, in a rat model for schizophrenia, focusing on (+)-MK-801 induced social withdrawal. Social behaviour and motor activity were assessed using a videotracking system, allowing automated analysis of the behaviour. Both (-)-OSU6162 and ACR16 were capable of restoring social behaviour, measured as proximity, to control level. These results indicate that these drugs may be effective in the treatments of negative symptoms.
Authors	Johan P Rung, Arvid Carlsson, Katarina Rydén Markinhuhta, Maria L Carlsson
Journal	Progress in neuro-psychopharmacology & biological psychiatry (Prog Neuropsychopharmacol Biol Psychiatry) Vol. 29 Issue 5 Pg. 833-9 (Jun 2005) ISSN: 0278-5846 [Print] England
PMID	15913873 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References	Antipsychotic Agents Dopamine Antagonists Excitatory Amino Acid Antagonists Piperidines OSU 6162 Dizocilpine Maleate pridopidine Clozapine Haloperidol Dopamine
Topics	Animals Antipsychotic Agents (pharmacology) Clozapine (pharmacology) Dizocilpine Maleate (antagonists & inhibitors, pharmacology) Dopamine (physiology) Dopamine Antagonists (pharmacology) Excitatory Amino Acid Antagonists (pharmacology) Haloperidol (pharmacology) Male Motor Activity (drug effects) Piperidines (pharmacology) Rats Rats, Sprague-Dawley Schizophrenic Psychology Social Behavior

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