DLG4 and psychotic disorder: Notably, the evidence of PSD’s role in the neurobiology underpinning psychotic disorders is supported by studies showing that antipsychotic treatment significantly affects the gene expression of PSD proteins, including Homer, postsynaptic density protein 95 (PSD-95), Shank, stargazing, and DISC1 [211,212,213,214,215,216,217].