Ketamine-induced antidepressant like effects in mice: A possible involvement of cannabinoid system

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Abstract

The purpose of this study was to explore the possible interaction between ketamine and cannabinoid system in the modulation of depression-related responses using the forced swimming test (FST), tail suspension test (TST) and open-field test (OFT) in mice. Our results revealed that intra-peritoneal (i.p.) injection of ketamine (5 and 10 mg/kg), a non-competitive NMDA antagonist, dose-dependently produced antidepressant-like effect in the FST. Moreover, i.p. administration of both CB1 and CB2 receptor drugs: ACPA (1 mg/kg; CB1 receptor agonist), AM251 (1 mg/kg; CB1 receptor antagonist), GP1a (2 mg/kg; CB2 receptor agonist) and AM630 (0.5 mg/kg; CB2 receptor antagonist) exhibited antidepressant action. Interestingly, the concomitant administration of ineffective doses of ketamine and cannabinoid receptor antagonists provoked the antidepressant-like effects as compared to control group. It should be considered, all above mentioned doses of drugs could not change locomotor activity in the OFT. It seems that possible interaction between ketamine and cannabinoid system may modulate depression-related behavior.

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Khakpai, F., Ebrahimi-Ghiri, M., Alijanpour, S., & Zarrindast, M. R. (2019). Ketamine-induced antidepressant like effects in mice: A possible involvement of cannabinoid system. Biomedicine and Pharmacotherapy, 112. https://doi.org/10.1016/j.biopha.2019.108717

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