TH and schizophrenia: GABRA2 (r = 0.630, p = 0.001), and GABRA3 (r = 0.762, p < 0.0001) mRNAs were significantly positively correlated with TH mRNA in schizophrenia cases, but not in control cases (r = -0.200, p = 0.339; r = 0.105, p = 0.624, respectively), and these correlations were significantly different when comparing diagnostic groups (GABRA2: z = -3.13, p = 0.002 and GABRA3: z = -3.04, p = 0.002) (Fig. 6c–f, Table 4).