• Psychiat Danub · Mar 2013

    Serum levels of interleukin-6 and tumor necrosis factor-alpha in exacerbation and remission phase of schizophrenia.

    • Bojana Dunjic-Kostic, Miroslava Jasovic-Gasic, Maja Ivkovic, Nevena V Radonjic, Maja Pantovic, Aleksandar Damjanovic, Sanja Totic Poznanovic, Aleksandar Jovanovic, Tatjana Nikolic, and Natasa D Petronijevic.
    • Clinic for Psychiatry, Clinical Centre of Serbia, Belgrade, Serbia. bojanadunjic1978@gmail.com
    • Psychiat Danub. 2013 Mar 1; 25 (1): 55-61.

    BackgroundThe variations in proinflamatory cytokine levels have been associated with schizophrenia (SCH), duration of illness, psychopathology and treatment. The aim of the study was to investigate serum levels of interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) in schizophrenic patients during exacerbation and remission, and its association with course of illness and therapy.Subjects And MethodsWe measured serum levels of IL-6 and TNF-α in 43 schizophrenic patients in exacerbation and remission and compared them to 29 healthy controls, matched by sex, age, body mass index (BMI) and smoking habits. The severity of psychopathology was assessed using the Positive and Negative Syndrome Scale (PANSS).ResultsThere was no difference in levels of IL-6 and TNF-α in exacerbation compared to remission in schizophrenic patients. IL-6 was higher and TNF-α was lower in schizophrenic patients in both exacerbation and remission in comparison with healthy controls. TNF-α in exacerbation was in negative correlation with IL-6 in remission. No statistical significance was found between levels of cytokines and sex, age, BMI, smoking habits, antipsychotic medication, duration of treatment and duration of illness. IL-6 levels were in positive correlation with the age of onset and the duration of untreated psychosis. In schizophrenic patients on adjunctive treatment with mood stabilizers, TNF-α levels increased in remission.ConclusionOur results suggest that the connection between schizophrenia, cytokines and medication is multifaceted, and not necessarily linear. Adjunct mood stabilizers not only ameliorate psychopathology, but might convey immunomodulatory effects as well. Further longitudinal studies could elucidate potential beneficial effect of combined therapy in treatment of SCH.

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