Abstract
Background and purposeCannabidiolic acid methyl ester (HU-580) was recently shown to reduce stress-induced anxiety-like behavior in rats. The aim of this study was to examine the antidepressant effect of HU-580 in two different rat models of depression. Experimental approachUsing the forced swim test (FST), we evaluated the effect of HU-580 in 43 Wistar–Kyoto (WKY) and 23 Flinders Sensitive Line (FSL) adult male rats. Key results1 mg/kg HU-580 reduced immobility and increased swimming in WKY rats, compared to vehicle-treated controls (p < 0.05). This dose exerted similar effects in FSL rats (p < 0.05). Conclusion and implicationsThis is the first report of antidepressant efficacy of HU-580. These findings expand the very limited existent results, suggesting that HU-580 is a potent anxiolytic agent. Taken together with its chemical stability, HU-580 emerges as a candidate for a future antidepressant medication.
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