fluoxetine hydrochloride (Tocris Bioscience, Oakville ON, Canada), escitalopram oxalate (Tocris Biosceicne) and ketamine (Narketan 10, Vetoquinol, Lavaltrie, QC, Canada) were diluted in 0.9% NaCl solution and administered IP as follows: acute fluoxetine, 1 dose of 3 mg kg‒1 (behavioral testing/tissue collection occurred 0.5 h after injection); chronic fluoxetine, 14 doses (daily) of 10 mg kg‒1 (tissue collection occurred 0.5 h after last injection); repeated citalopram 3 doses of 10 mg kg‒1 (24, 5 and 0.5 h before tissue collection); ketamine (10 mg kg‒1) 1 or 24 h before behavioral testing/tissue collection or mPFC whole-cell recordings.
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