Stereotyped behaviour in response to the selective D-2 dopamine receptor agonist RU 24213 is enhanced by pretreatment with the selective D-1 agonist SK&F 38393.
When given alone, 2.5 mg/kg of the selective D-2 agonist RU 24213 was a threshold dose for the induction of weak stereotyped behaviour, while 15 mg/kg of the selective D-1 agonist SK&F 38393 failed to induce stereotypy. Responses to 2.5 mg/kg RU 24213 were dose-dependently potentiated by 3.0-15.0 mg/kg SK&F 38393, and compulsive stereotypy was only evident in animals receiving the combination treatment. Increasing D-1 dopaminergic activity appears to promote the expression of behaviours initiated through D-2 receptor stimulation.
D015647:2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine; D000818:Animals; D001552:Benzazepines / Q000008:administration & dosage*; D004357:Drug Synergism; D008297:Male; D010627:Phenethylamines / Q000008:administration & dosage*; D051381:Rats; D011919:Rats, Inbred Strains; D011954:Receptors, Dopamine / Q000187:drug effects*; D013239:Stereotyped Behavior / Q000187:drug effects*; D013268:Stimulation, Chemical
D001552:Benzazepines; D010627:Phenethylamines; D011954:Receptors, Dopamine; D015647:2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine; C016868:N-n-propyl-N-phenylethyl-4(3-hydroxyphenyl)ethylamine hydrochloride