GRM1 and schizophrenia: EAAT2 levels were significantly lower also in the hippocampus of schizophrenia patients, while a significantly higher levels in mGluR1 were found in this brain region, compared to controls (adjusted means [95% CI]; EAAT2: CTRL = 97.1 [73.3–120.8], SCZ = 46.4 [21.8–70.9]% of control, F(1,35) = 7.078, p = 0.012; mGluR1: CTRL = 88.1 [49.0–127.3], SCZ = 158.4 [119.3–197.5]% of control, F(1,24) = 5.435, p = 0.028; (Fig. 3p′,h′, Supplementary Fig. 2, Supplementary Table 5).