CXCL8 secretion did not differ between the schizophrenia or control group, irrespective of stimulation status (p >0.05), while IL-10 secretion was significantly higher in PHA-stimulated PBMCs compared with non-stimulated cells, both in the schizophrenia and control groups (p < 0.001). This evidence concerns the gene CXCL8 and schizophrenia.