Efeitos dos compostos quercetina, quercetina em nanoemulsão, resveratrol e rutina sobre a hepatotoxicidade e neurotoxicidade induzidas por oxaliplatina em camundongos

• Ano de defesa: 2013
• Autor(a) principal: Schwingel, Tania Elaine
• Orientador(a): Morrone, Fernanda Bueno
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul; Porto Alegre
• Palavras-chave em Português: BIOLOGIA CELULAR; NEUROPATIAS; FENÓIS; OXIDAÇÃO - LABORATÓRIOS
• Link de acesso: http://hdl.handle.net/10923/5521

Introduction : Oxaliplatin is an antineoplastic agent widely used in the treatment of some tumors. It is a third-generation platinum compound developed with the purpose of overcoming the limitations of toxicity, tumor resistance and poor oral bioavailability associated to cisplatin administration. Oxaliplatin-associated neurotoxicity represents the main dose limiting and there is not suitable treatment. Increasing doses of oxaliplatin can leed to the development of mechanical allodynia, cold sensitivity and peripheral sensory neuropathy, with increase of symptoms. Furthermore, despite its usefulness, chemotherapy with oxaliplatin increases the rate of developing hepatic damages together with inflammatory activity. This might be termed chemotherapy-associated steatohepatitis (CASH), a most severe form of non-alcoholic fatty liver disease. Therefore, in the presentstudy, we aimed to compare the effect of antioxidant compounds on simultaneous development of oxaliplatin-induced hepato and neurotoxicity in mice. Methods : The Balb/c mice were treated with doses of oxaliplatin (OXA) for 6 weeks, 10 mg/kg, intraperitoneally (i. p), resulting in mechanical allodynia, and hepatic steatosis. We administered antioxidants compounds such as rutin (RUT) (20 mg/Kg/d), resveratrol (RVS) (100 mg/Kg/d), quercetin (QT) (20 mg/Kg/d) and nanoquerecetin (NQT) (20 mg/Kg/d) daily by gavageto Balb/c. N-acetyl-cysteine was used as control. Euthanasiaoccurred onday 43after treatment. We evaluated mechanical nociceptive threshold, ALT/AST, histopathological analysisand MPOactivity. Statistical analyses were made one way ANOVA, followed by Bonferroni post hoc test. Results : The treatments with RSV, RUT or NQT were able to prevent mechanical allodynia when compared to OXA group. Regarding the effect on steatohepatitis, resveratrol, quercetin and quercetin nanoemulsion almost completely reversed the mean liver weight increase by OXA. In accordance with these previous data, histological evaluation depicted attenuation all features of hepatic steatosis evaluated in resveratrol, rutin, quercetin and quercetin nanoemulsion groups. On the other hand, only quercetin and quercetin nanoemulsion treatments were able to reduce neutrophils migration measured by MPO activity. Conclusion : These results suggest that the use of compounds such as resveratrol, rutin, quercetin and quercetin nanoemulsion can beeffective to avoid oxaliplatin-inducing hepato and neurotoxicity in a rodent model.