Linalool and β-pinene exert their antidepressant-like activity through the monoaminergic pathway

Life Sciences
S L Guzmán-GutiérrezR Reyes-Chilpa

Abstract

Linalool and β-pinene are two volatile monoterpenes that possess antidepressant-like activity. These are components of many aromatic plants used in folk medicine around the world to relieve anxiety and depression. In this contribution, we focused on examining the mechanism of action of these compounds. We used mice in the forced swimming test (FST) and antagonist drugs (i.p.) to receptors related to the depression process such as 5-HT1A. To assess the possible contribution of the serotoninergic system, animals were pre-treated with WAY 100635 (a 5-HT1A receptor antagonist) and PCPA (a serotonin synthesis inhibitor).To assess the participation of the noradrenergic system, the animals were pre-treated with yohimbine (an α2 receptor antagonist), propranolol (a β receptor antagonist) and neurotoxin DSP-4 (a noradrenergic neurotoxin). In the dopaminergic system, we used SCH23390 (a D1 receptor antagonist). WAY 100635 blocked the antidepressant-like effect of linalool and β-pinene. In contrast, pretreatment of mice with PCPA did not modify reductions in the immobility time elicited by the two monoterpenes. The yohimbine modified the effect of linalool on immobility time. Propranolol and neurotoxin DSP-4 reversed the anti-immobility e...Continue Reading

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