6 research outputs found

    Vitamin C and Vitamin E in Prevention of Nonalcoholic Fatty Liver Disease (NAFLD) in Choline Deficient Diet Fed Rats

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    AIM: Oxidative stress has been implicated in the pathogenesis of Nonalcoholic Fatty Liver Disease (NAFLD). Vitamin C and vitamin E are known to react with reactive oxygen species (ROS) blocking the propagation of radical reactions in a wide range of oxidative stress situations. The potential therapeutic efficacy of antioxidants in NAFLD is unknown. The aim of this study was to evaluate the role of antioxidant drugs (vitamin C or vitamin E) in its prevention. METHODS: Fatty liver disease was induced in Wistar rats by choline-deficient diet for four weeks. The rats were randomly assigned to receive vitamin E (n = 6) – (200 mg/day), vitamin C (n = 6) (30 mg/Kg/day) or vehicle orally. RESULTS: In the vehicle and vitamin E-treated rats, there were moderate macro and microvesicular fatty changes in periportal area without inflammatory infiltrate or fibrosis. Scharlach stain that used for a more precise identification of fatty change was strong positive. With vitamin C, there was marked decrease in histological alterations. Essentially, there was no liver steatosis, only hepatocellular ballooning. Scharlach stain was negative. The lucigenin-enhanced luminescence was reduced with vitamin C (1080 ± 330 cpm/mg/minx10(3)) as compared to those Vitamin E and control (2247 ± 790; 2020 ± 407 cpm/mg/minx10(3), respectively) (p < 0.05). Serum levels of aminotransferases were unaltered by vitamin C or vitamin E. CONCLUSIONS: 1) Vitamin C reduced oxidative stress and markedly inhibited the development of experimental liver steatosis induced by choline-deficient diet ; 2)Vitamin E neither prevented the development of fatty liver nor reduced the oxidative stress in this model

    Hipomelanose macular progressiva: estudo epidemiolĂłgico e resposta terapĂȘutica Ă  fototerapia

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    FUNDAMENTOS: A hipomelanose macular progressiva Ă© uma dermatose comum em diferentes continentes. Sua causa Ă© desconhecida e os tratamentos propostos sĂŁo pouco eficazes. OBJETIVOS: Determinar aspectos epidemiolĂłgicos da hipomelanose macular progressiva em pacientes atendidos num setor de fototerapia, no perĂ­odo de 1997 a 2008, e avaliar a resposta terapĂȘutica com PUVA ou UVBNB. MÉTODOS: Foram avaliados 84 pacientes com Hipomelanose Macular Progressiva. ApĂłs 16 sessĂ”es de fototerapia, a resposta terapĂȘutica foi definida: I=inalterado, MD=melhora discreta(< 50% de repigmentação), MM=melhora moderada(50-79%), MI=melhora intensa(80-99%) e C=cura(100%). ApĂłs um tempo mĂ­nimo de trĂȘs meses, pacientes com cura ou MI foram contatados por telefone para avaliar a manutenção do resultado terapĂȘutico. RESULTADOS: Predominaram mulheres (79%) e a cor branca. A idade mĂ­nima de aparecimento da Hipomelanose Macular Progressiva foi de 13 anos e a mĂĄxima de 36 anos. Fototerapia com PUVA foi indicada em 27 pacientes e UVBNB em 57. Estatisticamente, nĂŁo houve diferença significante entre o tratamento com PUVA e UVBNB (teste de Fisher P&gt;0.05). A maioria (81%) dos pacientes obteve 50% ou mais de repigmentação e 65% tiveram cura ou MI. Entretanto, 72% apresentaram recorrĂȘncia das lesĂ”es. CONCLUSÃO: A ausĂȘncia de pacientes, com mais de 40 anos, sugere que a Hipomelanose Macular Progressiva seja uma doença autolimitada. Tanto PUVA como UVB NB sĂŁo opçÔes terapĂȘuticas, porĂ©m nĂŁo impedem a recidiva da doença
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