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• W1937072630 abstract "Schizophrenia is accompanied by increased lipid peroxidation and nitric oxide (NO) levels and by lowered antioxidant levels. However, the effect of antipsychotic agents on these processes remains unclear. The objective of this study is to determine the oxidative stress (OS) status in drug naïve first-episode psychotic patients (FEP) compared to healthy controls and to delineate the effects of risperidone on these biomarkers. 51 drug naive FEP patients and 61 healthy controls were enrolled; FEP patients were reassessed 11 weeks after risperidone treatment. Three OS biomarkers, i.e. lipid hydroperoxides – LOOH, NO metabolites – NOx, and advanced oxidation protein products – AOPP, and two antioxidant biomarkers, i.e. total radical-trapping antioxidant parameter – TRAP, and paraoxonase 1 – PON1, were measured. The Positive and Negative Syndrome Scale (PANSS) and the Calgary Depression Scale for Schizophrenia (CDSS) were used to measure symptoms severity. Significantly lower PON1 activity and increased TRAP values were found in FEP patients. There were no significant associations between any of the OS/antioxidant biomarkers and clinical data. Risperidone treatment significantly increased PON1 activity and decreased LOOH levels. These effects of risperidone were not significantly associated with the clinical response and risperidone dosage. Changes in antioxidant profile, but not in lipid or protein oxidation or increased NO production, were found in drug-naive FEP. Risperidone may have antioxidant effects by lowering lipid peroxidation and increasing the antioxidant defenses against lipid peroxidation related to PON1. None of the biomarkers predicted treatment outcome." @default.
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• W1937072630 date "2015-09-01" @default.
• W1937072630 modified "2023-10-12" @default.
• W1937072630 title "Oxidative stress in drug naïve first episode psychosis and antioxidant effects of risperidone" @default.
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• W1937072630 doi "https://doi.org/10.1016/j.jpsychires.2015.07.003" @default.
• W1937072630 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26228421" @default.
• W1937072630 hasPublicationYear "2015" @default.
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