Three genes related to neurological function (STXBP1, SNCA, and SOD2) by comparing wild-type THAP1 cell line with both mutant cell lines and seven candidates from dysregulated genes by overexpressing wild-type THAP1 based on gene function (related to neurological function or neurological disease) (DDC, PLA2G3, STX3, STX1A, MAP2, CNTNAP2, andSYT9) were selected to confirm the results of microarray. The gene discussed is DDC; the disease is nervous system disorder.