Avaliação do efeito do disseleneto de difenila sobre o dano à proteína em órgãos de ratos submetidos à sepse

• Ano de defesa: 2013
• Autor(a) principal: Castro, Charles Martins de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Sepse; Órgãos; Ratos; Estresse oxidativo; Disseleneto de difenila
• Link de acesso: https://repositorio.animaeducacao.com.br/handle/ANIMA/3128

The importance of reactive oxygen species in the pathophysiology of sepsis is well established. But not yet has an effective antioxidant therapy for use in these patients. It is known that mitochondria from different organs have different resistances to oxidative damage. In a first step, we evaluated the effect on mortality at 10 days of various doses of diphenyl diselenide (PhSe)2 (10 mg / kg, 50 mg / kg, 100 mg / kg) following induction of sepsis in an animal model for Cecal Ligation and puncture (CLP) in relation to the model CLP + vehicle and sham. The dose of 50 mg / kg (PhSe)2 was the one that caused a significant reduction of mortality compared to the sham group (30% vs 70% respectively). In a second phase, we evaluate the action of (PhSe)2 50 mg / kg on protein carbonylation, 12 and 24 hours after induction of sepsis in the same animal model CLP. Male Wistar rats (250-300g) were divided into 3 groups (sham, vehicle + CLP and CLP + 50 mg / kg (PhSe)2). The antioxidant was administered 1 and 12 hours after the surgical procedure. Since the animals were sacrificed 12 and 24 hours after surgery, with subsequent removal of the liver, spleen, lung, heart, kidney and quadriceps for analysis of protein carbonylation. At 12 hours later, the presence of protein carbonyls in the liver, spleen and kidneys of rats subjected to CLP showed significantly higher compared to the sham group. The addition of (PhSe)2 caused a significant reduction in protein carbonylation in the liver, heart and kidney. After 24 hours of evolution, the presence of carbonyl protein remained significantly higher in the liver, spleen and kidneys, in addition to show elevated in heart and quadriceps of rats subjected to CLP. In late evaluation, the addition of (PhSe)2 caused a reduction of carbonyl protein only in the heart and quadriceps. Despite the reduction in mortality, the analysis of individual organs showed discrepant with antioxidant activity of (PhSe)2 only in some organs.