The traxoprodil (Sigma-Aldrich, St. Louis, USA) doses were dissolved in 0.9% saline containing 1% Tween-80, and the fluoxetine hydrochloride (Sigma-Aldrich, St. Louis, USA) doses were dissolved in 0.9% saline. Mice were administered traxoprodil (10 mg/kg, 20 mg/kg, and 40 mg/kg, i.p.), fluoxetine hydrochloride (5 mg/kg, i.p.), or 0.9% saline for 7, 14, and 21 days, respectively. All drug solutions used in this study were administered at a volume of 10 ml/kg and prepared just before use.
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