DGCR8 and schizophrenia: However, despite a number of systematic investigations of genes in the 22q11.2DS region and the ever increasing number of GWAS data sets (Karayiorgou et al., 2010; Sullivan et al., 2012), no genetic study to date has identified common variation in DGCR8 or MIR185 as a risk factor for schizophrenia.