GPM6A and bipolar disorder: Downregulation of GPM6A mRNA levels has been shown in the hippocampus of depressed suicide victims (Fuchsova et al., 2015) and the association of GPM6A gene with schizophrenia (Boks et al., 2008; Ma et al., 2018), bipolar disorders (Greenwood et al., 2012), and claustrophobia (El-Kordi et al., 2013) has been described.