Within the fetal PPIN, a common group of genes (i.e., KANSL1, LINC02210, RP11-259G18.3, MAPT-AS1, RP11-259G18.1, and MAPT) were associated with most of the mood/brain-related phenotypes (e.g., neuroticism, Parkinson’s disease, depression, mood swings, and white matter microstructure). This evidence concerns the gene MAPT and major depressive disorder.