Monoaminergic neurotransmission is mediating the antidepressant-like effects of Passiflora edulis Sims fo. edulis

• Published in: Neuroscience letters Vol. 660; pp. 79 - 85
• Main Authors: Ayres, Adriana S.F.S.J., Santos, Wilton B., Junqueira-Ayres, Décio D., Costa, Geison M., Ramos, Freddy A., Castellanos, Leonardo, Alves, Jovelina S.F., Asth, Laila, Medeiros, Iris U. de, Zucolotto, Silvana M., Gavioli, Elaine C.
• Format: Journal Article
• Language: English
• Published: Ireland Elsevier B.V 01.11.2017
• Subjects: Acetates - administration & dosage; Animals; Antidepressants; Antidepressive Agents - administration & dosage; Antidepressive Agents - isolation & purification; Antidepressive Agents, Second-Generation - administration & dosage; Antidepressive Agents, Tricyclic - administration & dosage; Behavior, Animal; Benzylamines - administration & dosage; Biogenic Monoamines - metabolism; Butanols - administration & dosage; Catecholamines - antagonists & inhibitors; Catecholamines - metabolism; Depression - drug therapy; Depression - metabolism; Dopamine; Dopamine Antagonists - administration & dosage; Fluoxetine - administration & dosage; Forced swimming test; Male; Mice; Mouse; Nortriptyline - administration & dosage; Passiflora - chemistry; Passiflora edulis; Plant Extracts - administration & dosage; Plant Extracts - isolation & purification; Serotonin; Sulpiride - administration & dosage; Synaptic Transmission; Forced swimming test; PCPA; Dopamine; AE; Serotonin; FST; Passiflora edulis; DSP-4; AMPT; BuOH; Mouse; Antidepressants; AcOEt
• ISSN: 0304-3940; 1872-7972
• DOI: 10.1016/j.neulet.2017.09.010

•Administration of Passiflora edulis induces antidepressant-like effects in mice.•Flavonoids seem to be mediating the antidepressant effects of Passiflora edulis.•5-HT and dopamine transmission are needed for the antidepressant action of P. edulis. The genus Passiflora is popularly used to treat anxiety. Recent studies showed antidepressant-like effects of two varieties of P. edulis (edulis and flavicarpa) in mice. However, the mechanisms of antidepressant actions are still unknown. Here, the effects of P. edulis fo. edulis aqueous extract (AE, 100–300mg/kg, po), and ethyl acetate (AcOEt, 25–50mg/kg, po), butanol (BuOH, 25–50mg/kg, po) and residual aqueous (25–100mg/kg, po) fractions were investigated in the mouse forced swimming test. In addition, the involvement of monoamines in the P. edulis fractions-induced antidepressant actions was approached. HPLC analyses showed that AcOEt and BuOH, but not residual, fractions shared with AE the main peaks between 25 and 70min (UV 340nm), which are suggestive of flavonoids. Nortriptyline and fluoxetine reduced the immobility time and similar results were observed for AE, AcOEt and BuOH but not residual fractions. PCPA (inhibitor of 5-HT synthesis), AMPT (inhibitor of catecholamine synthesis) and sulpiride (selective D2 receptor antagonist), but not DSP-4 (noradrenergic neurotoxin), blocked the antidepressant actions of AcOEt and BuOH. In conclusion, AcOEt and BuOH fractions shared with AE similar phytochemical composition and antidepressant actions. Preserved 5-HT and dopamine transmissions were required for the antidepressant effects of P. edulis fractions.