RESUMO
INTRODUCTION: Differences in parameters related to inflammatory and oxidative stress in deficit (DS) and nondeficit schizophrenia (non-DS) may support the DS/non-DS categorization of schizophrenia. For DS patients, non-DS patients, and for healthy controls, this study aims to evaluate the serum levels of: proinflammatory cytokines of interleukin (IL) 1ß, tumor necrosis factor (TNF) α, Interferon (IFN) γ, IL-12, and IL-17; anti-inflammatory cytokines of IL-10, IFN-α, and transforming growth factor (TGF) ß; and antioxidant biomarkers of paraoxonase1 (PON1) and Total Antioxidant Capacity (TAOC). METHOD: Serum IL-1ß, TNF-α, IFN-γ, IL-12, IL-17, IL-10, IFN-α, TGF-ß, PON1 and TAOC levels were measured and performed in DS (n=26), non-DS (n=28), and healthy control (n=28) groups. RESULTS: Patients in the DS group had higher IL-17 levels than the non-DS group did. TGF-ß values for both patient groups were significantly higher than those of the controls. PON1 and TAOC values for both patient groups were significantly lower than those of the controls. CONCLUSION: Our findings may be evidence for the consideration that DS reflects a coherent entity within schizophrenia. Increased levels of IL-17 from pro-inflammatory cytokines may be related with DS.