TSPO and schizophrenia: However, AIF1, CD68, and TSPO mRNA levels were significantly different according to subgroup (all F > 3.84, df = 2,51–53, p < 0.05; Fig. 3d–f) with increased AIF1, CD68 and TSPO mRNA in the schizophrenia/high immune subgroup compared with the schizophrenia/low immune subgroup (p < 0.05) and in the schizophrenia/high immune subgroup compared with the control group for CD68 and TSPO mRNAs (p < 0.05).