Expression levels of GABA-associated mRNAs in the cortex of mice with glutamic acid decarboxylase 67 (GAD67) knockout in parvalbumin (PV) neurons. Mean ± SEM expression levels of GABA transporter-1 (GAT-1; A), PV (B), KCNS3 (C), brain-derived neurotrophic factor (BDNF; D), tropomyosin receptor kinase B (TrkB; E), GABAAR α1 (F), somatostatin (SST; G), and glutamic acid decarboxylase 65 (GAD65; H) mRNAs in the prefrontal cortex (PFC) and sensorimotor cortex (SMC) of PVGAD67+/+, PVGAD67+/−, and PVGAD67−/− mice at 8 and 15 weeks of age. Bars not sharing the same letter are statistically different.