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- W4236079428 abstract "The adenosine A2A receptor agonist CGS 21680 has shown effects similar to dopamine antagonists in behavioural assays in rats predictive for antipsychotic activity, without induction of extrapyramidal side-effects (EPS). In the present study, we examined whether this functional dopamine antagonism and lack of EPS in rodents could also be observed in non-human primates. We investigated the effects of CGS 21680 on behaviours induced by D-amphetamine and (−)-apomorphine in EPS-sensitized Cebus apella monkeys. CGS 21680 was administered s.c. in doses of 0.01, 0.025 and 0.05 mg/kg, alone and in combination with D-amphetamine and (−)-apomorphine. The monkeys were videotaped after drug administration and the tapes were rated for EPS and psychosis-like symptoms. CGS 21680 decreased apomorphine-induced behavioural unrest, arousal (0.01–0.05 mg/kg) and stereotypies (0.05 mg/kg) while amphetamine-induced behaviours (unrest, stereotypies, arousal) were unaffected. EPS were not observed at any dose. At 0.05 mg/kg CGS 21680 produced vomiting. The two lower doses did not produce observable side-effects. Though the differential effect on amphetamine- and apomorphine-induced behaviours is intriguing, CGS 21680 showed a functional anti-dopaminergic effect in Cebus apella monkeys without production of EPS. This further substantiates that adenosine A2A receptor agonists may have potential as antipsychotics with atypical profiles." @default.
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- W4236079428 date "2002-12-01" @default.
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- W4236079428 title "The adenosine A2A receptor agonist CGS 21680 exhibits antipsychotic-like activity in Cebus apella monkeys" @default.
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- W4236079428 doi "https://doi.org/10.1097/00008877-200212000-00005" @default.
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