Add time:08/03/2019         Source:sciencedirect.com

The behavioural effects of two cholecystokinin analogues Boc-Tyr(SO3H)-Nle-Gly-Trp-Nle-Asp-Phe-NH2 (JMV 236 (cas 113137-57-8)), a potent CCK agonist, and Boc-Tyr(SO3H)-Nle-Gly-DTrp-Nle-Asp-2-Phenylethylester (JMV 179), a CCK antagonist were studied. JMV 236 (3.125, 12.5 and 50 μg/kg i.p.) dose-dependently decreased the exploratory activity of rats, the effect being significant for horizontal activity (ambulation) at doses of 12.5 and 50 μg/kg and for vertical activity (rearing) at a dose of 50 μg/kg. JMV 179 (3.125, 12.5 and 50 μg/kg i.p.) did not change the horizontal activity but dose-dependently decreased the vertical activity, the effect being significant at a dose of 50 μg/kg. JMV 236 administered immediately after training significantly facilitated short-term memory in passive avoidance situation but only tended to increase the mean latency upon retention testing on the 7th day. JMV 179 tended to increase the latency of the passive avoidance response upon retention testing at the 24th hour but not on the 7th day after training.

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