title: [Catecholaminergic component of the action of a heptapeptide analog of ACTH4-10 on the open-field behavior of rats].
abstract: Heptapeptide Met-Glu-His-Phe-Pro-Gly-Pro (ACTH4-10 analog) at a dose of 0.015 mg/kg failed to alter open field behaviour of rats in the first test series. The peptide abolished amphetamine-induced stimulation of the exploratory and grooming behaviour. Extinction of the rats' exploratory behaviour during second test series in the open field (7 days later) was disturbed when haloperidol or apomorphine were injected before the first test series. When the peptide was administered with haloperidol or apomorphine, the extinction tended to become normal. Heptapeptide failed to change noradrenaline, dopamine or 5-hydroxytryptamine content in the rat forebrain. However, this peptide at a concentration of 10(-4) M moderately diminished tyrosine hydroxylation velocity in the rat striatal or hypothalamic synaptosomes, the effect depending on tyrosine concentration. These data suggest the involvement of catecholaminergic component into the heptapeptide action on the behaviour of rats.
mesh_terms: D000324:Adrenocorticotropic Hormone / Q000031:analogs & derivatives* / Q000494:pharmacology; D000661:Amphetamine / Q000494:pharmacology; D000818:Animals; D001058:Apomorphine / Q000494:pharmacology; D001522:Behavior, Animal / Q000187:drug effects*; D005106:Exploratory Behavior / Q000187:drug effects; D005108:Extinction, Psychological / Q000187:drug effects; D006120:Grooming / Q000187:drug effects; D006220:Haloperidol / Q000494:pharmacology; D008297:Male; D010446:Peptide Fragments / Q000494:pharmacology*; D051381:Rats
chemical_list: D010446:Peptide Fragments; D000324:Adrenocorticotropic Hormone; D000661:Amphetamine; C011394:ACTH (4-10); D006220:Haloperidol; D001058:Apomorphine
vernacular_title: Katekholaminergicheskiĭ komponent v deĭstvii geptapeptidnogo analoga AKTG4-10 na povedenie krys v teste otkrytogo polia.