Online database search revealed that 13 DEPs (i.e., OLIG1, KIBRA, RAI1, FGFR2, DDC, MED22, SLIT2, LMTK3, CSMD1, COX3, FSTL1, GRIK4, CRHBP) were associated with depression. This evidence concerns the gene GRIK4 and depressive disorder.