Abstract Red cabbage (Brassica oleracea L. var. capitata f. rubra DC.) extract has been demonstrated hypolipidemic and antioxidant capacity. Herein, we investigated the effect of red cabbage aqueous extract (RC) or fenofibrate (FF) in oxidative stress induced by Triton WR-1339 in rats. The antioxidant capacity was evaluated through the superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) activities and, thiobarbituric reactive species (TBARS) and protein carbonyl (PC) levels in erythrocytes, liver, kidneys, cerebral cortex and hippocampus of male rats. The alterations promoted by Triton WR-1339 in enzymatic antioxidant defense in the liver, kidneys and hippocampus were reversed by RC or FF treatments. The TBARS and PC levels increased in the liver, cerebral cortex and hippocampus of hyperlipidemic rats were decreased by the treatments with RC or FF. These findings demonstrated that RC is a potential therapy to treat diseases not only involving dyslipidemic condition but also oxidative stress.

O presente estudo tem o objetivo de investigar diretamente os efeitos comportamentais e antioxidantes da sinvastatina em um modelo de mania bipolar induzida por dimesilato de lisdexanfetamina. Ratos Wistar foram tratados durante 30 dias com simvastatina. No 24º dia após o início do tratamento, foi administrada dimesilato de lisdexanfetamina durante 7 dias em cada rato. Os resultados sugerem que sinvastatina combinada com dimesilato de lisdexanfetamina induziu um aumento significativo na locomoção, e administração de dimesilato de lisdexanfetamina provoca um desequilíbrio oxidativo determinado por um aumento na peroxidação lipídica, oxidação de proteínas e alterações nas atividades de enzimas antioxidantes em áreas do cérebro; adicionalmente, na presença de sinvastatina a maioria destes efeitos foram bloqueados. Estes resultados contribuem para um melhor entendimento dos papeis críticos do tratamento dos distúrbios neuropsiquiátricos com dimesilato de lisdexanfetamina, associado com o aumento do estresse oxidativo e com alterações das enzimas antioxidantes. Tendo em vista o papel central exercido pelo dimesilato de lisdexanfetamina, o efeito antioxidante estabelecido pela terapia com sinvastatina é de grande interesse.

The present study aims to directly investigate the behavioral and antioxidant effects of simvastatin in a model of bipolar mania induced by lisdexamfetamine dimesylate. Wistar rats were treated for 30 days with simvastatin. On the 24th day after the start of treatment, each rat was administered lisdexamfetamine dimesylate for 7 days. The results suggest that simvastatin combined with lisdexamfetamine dimesylate induced a significant increased locomotion and lisdexamfetamine dimesylate administration causes an oxidative imbalance determined by an increment in lipid peroxidation, protein oxidation and alterations in the activities of antioxidant enzymes in brain areas; moreover, in the presence of simvastatin, most of these effects were prevented. These findings contribute to a better understanding of the critical roles of lisdexamfetamine dimesylate in the treatment of neuropsychiatric disorders, associated with increased oxidative stress and changes in antioxidant enzymatic defense. In view of the central role played by lisdexamfetamine dimesylate, the established antioxidant effect of simvastatin therapy is of major interest.