GABRA2 and schizophrenia: GABRA2 mRNA was decreased by 21.53% in the midbrain in schizophrenia cases compared to controls (t(50) = 3.369; p = 0.001) (Fig. 3b) and was unchanged when analysed by inflammatory subgroup (F(2,50) = 2.605, p = 0.084) (Table 3).