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The water extract of tutsan (Hypericum androsaemum L.) red berries exerts antidepressive-like effects and in vivo antioxidant activity in a mouse model of post-stroke depression.
Biomedicine & Pharmacotherapy 2018 March
Hypericum androsaemum L., commonly known as 'tutsan' or 'shrubby St. John's Wort', is a member of the Hypericum genus found growing spontaneously in the Mediterranean area and is cultivated extensively as an ornamental plant due to the showy color variation in its fresh berry-like capsules, which turn from red to shiny black as they ripen. Tutsan has also been used in Portuguese and Spanish folk medicine to treat depression. In this study, we assessed the beneficial role of the water extract of H. androsaemum red berries (WE) in an experimental animal model of post-stroke depression. WE was obtained by decoction of H. androsaemum red berries, and its content of ten bioactive compounds was determined through HPLC-DAD analysis. Behavioral tests were carried out using a mouse model of post stroke depression to examine the antidepressive-like activity of WE at two doses (15 and 30 mg/kg bw). In addition, the in vivo antioxidant activity in the mouse brain was evaluated by measuring CAT, GSH, and SOD activity and TBARS levels. WE contained significant amounts of shikimic acid (110.0 g/kg), chlorogenic acid (56.9 g/kg), catechin (5.8 g/kg) and hyperoside (2.7 g/kg). Overall, the highest dosage of WE was found to significantly reduce the symptoms of depression, restoring normal behaviour and reducing levels of oxidative stress by increasing endogenous antioxidant defenses. The protective effects of WE in post-stroke depression in a mouse model were demonstrated in vivo for the first time, and correlated with the antioxidant capacity of its bioactive constituents.
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