PNPLA8 and schizophrenia: Phosphoinositide-3-kinse regulatory subunit polypeptide 1 (PIK3R1), AT-binding transcription factor 1 (ATBF1), Lin-7 homolog b (Lin-7b) and calcium-independent phospholipase A2 gamma (IPLA2γ), had significantly altered expression in the STG in schizophrenia identified by microarray analysis.