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  • Title: Inhibition of haloperidol-induced catalepsy by cholecystokinin octapeptides after central administration to rats.
    Author: Kádár T, Penke B, Kovács K, Telegdy G.
    Journal: Neuropharmacology; 1985 Jun; 24(6):577-80. PubMed ID: 2862602.
    Abstract:
    The possible cataleptogenic or anticataleptic effects of cholecystokinin octapeptide sulphate ester (CCK-8-SE) and desulphated CCK-8 (CCK-8-NS) were evaluated in rats after intracerebroventricular (i.c.v.) administration. Neither CCK-8-SE nor CCK-8-NS induced any sign of catalepsy. When haloperidol, in a dose of 1.0 mg/kg (i.p.), and either CCK-8-SE or CCK-8-NS, in doses of 8, 80 or 800 pmol (i.c.v.), were applied at the same time, the peptides significantly decreased the total duration of catalepsy, the 80 pmol dose being the most effective. For the inhibition of catalepsy CCK-8-NS was the more active as it decreased catalepsy scores even 120 min after administration. Both peptides showed only transient effects on the fully developed catalepsy induced by haloperidol.
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