Abstract
Sub-chronic administration of PCP produces a social interaction deficit that is reversed by URB597, an inhibitor of the catabolic enzyme of the endocannabinoid anandamide. Since increased anxiety may contribute to social withdrawal and URB597 has been shown to have an anxiolytic action, we studied whether this drug affected saline- and PCP-treated rats' performance in the Elevated-Plus-Maze task, which has been used to assess anxiety-like effects. Sub-chronic PCP produced a CB 1-dependent decrease in anxiety-like behavior that was reversed by URB597 in a CB 1-independent fashion, as it was not blocked by the CB 1 antagonist AM251. These findings suggest that PCP-treated rats have altered endocannabinoid transmission and that anxiety does not contribute to the PCP-induced social withdrawal.
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