Changes in the cytokine profile in first episode, drug-naïve patients with psychosis after short-term antipsychotic treatment

Abstract

IntroductionAn increasing body of evidence suggests that antipsychotic medication can cause immunological changes that could be attributed to the amelioration of psychotic symptoms or the metabolic side effects of the drugs. So far, the results of the studies remain controversial.ObjectiveOur aim was to compare the levels of interleukin (IL) IL-2, IL-6 and transforming growth factor-β2 (TGF-β2) in drug-naïve, first-episode patients with psychosis before and after six weeks of antipsychotic medication.MethodsThirty-nine first episode patients with psychosis were enrolled in the study. Serum levels of IL-2, IL-6 and TGF-β2 were measured by enzyme linked immunosorbent assay (ELISA) before and six weeks after the initiation of antipsychotic medication. In addition, clinical psychopathology was assessed using Positive and Negative Syndrome Scale (PANSS) before and after treatment.ResultsSerum levels of IL-2 were significantly higher in the study group six weeks after the initiation of antipsychotic treatment (P < 0.001) while TGF-β2 levels were decreased (P < 0.001) and IL-6 levels were slightly reduced (P < 0.004).ConclusionThe changes in cytokine levels may be attributed to the action of antipsychotic medication and the remission of psychopathology. The reduction in TGF-β2 levels is observed in all patients and with all antipsychotic medications used. TGF-β2 may be a marker of clinical efficacy.Disclosure of interestThe authors have not supplied their declaration of competing interest.