GRM3 and schizophrenia: More recently, a large-scale genome-wide association study of almost 37,000 patients with schizophrenia identified the GRM3 locus, as well as 108 other loci, associated with schizophrenia [170], supporting the idea that mGlu3 may be a viable target along with mGlu2, despite the antipsychotic-like efficacy of mGlu2 specific potentiators in rodent models.