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Comparison of influence of I and II generation antipsychotic drugs on peroxidation of serum lipids in vitro

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Streszczenie

Schizophrenia is associated with disturbed pro- and antioxidative balance, resulting in worse treatment outcomes and development of various adverse effects. Several studies have documented an increase of lipid peroxidation in many different cells and body fluids in patients treated for schizophrenia. Lohr et al. stated that treatment with antipsychotics may be associated with increase of lipid peroxidation. To date, both in vitro and animal experimental studies, as well as clinical studies in humans, yielded contradictory results concerning the influence of antipsychotics on lipid peroxidation. In general opinion, II generation antipsychotics – SGAs do not exert an established effect on lipid peroxidation, in contrast to haloperidol, which is usually described as a drug with a definite prooxidation effect. The aim of this study was to determine the influence of SGAs on peroxidation of human serum lipids in vitro versus haloperidol induced lipid peroxidation under the same experimental conditions. Lipid peroxidation level was measured in serum obtained from healthy volunteers, by assessing the level of thiobarbituric acid-reactive substances (TBARS), according to the Rice-Evans method. Blood plasma was incubated for 24 hours with study drugs and without drugs (control group). The study revealed that SGAs do not induce any significant increase of TBARS as compared with control group, in contrast to haloperidol, which resulted in a significant increase of TBARS level (p<0.03). Clozapine, olanzapine and risperidone exert a significantly less pronounced effect on lipid peroxidation than haloperidol (p<0.05 for every comparator drug), not resulting in any significant prooxidative activity.

Słowa kluczowe
I generation antipsychotics, II generation antipsychotics, lipid peroxidation, TBARS, schizophrenia