Evidence for potentiation by CCK antagonists of the effect of cholecystokinin octapeptide in the elevated plus-maze.


Systemic treatment with cholecystokinin octapeptide (CCK-8, 2.5-10 micrograms/kg, s.c.), a non-selective CCK agonist, decreased the exploratory activity of mice in an elevated plus-maze. At higher doses (5-10 micrograms/kg) CCK-8 reduced the frequency of rearing, but only 10 micrograms/kg of CCK-8 significantly inhibited the number of line crossings in the… (More)


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