DRD2 and schizophrenia: Based on the above studies, our present study aimed to identify a new profile of peripheral biomarkers of schizophrenia by characterizing the expression patterns of DRD2 and DAT in PBLs of acute schizophrenia patients and chronic schizophrenia patients and to explore the relationship between their mRNA levels and the psychopathological status of schizophrenia as evaluated by the Positive and Negative Symptom Scale (PANSS).