Fenil éster do ácido caféico melhora a resposta ao estresse oxidativo em modelo animal de obesidade induzida por dieta hiperlipídica / Caffeic acid of phenethyl ester improves the oxidative stress response in animal model of obesity induced by high fat diet

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

Obesity is a disease that is increasing in a drastically way around the world and is implicated in many pathological conditions, such as insulin resistance, type 2 diabetes, dyslipidemia, fatty liver disease, hypertension and cardiovascular risk. Evidence has shown that obesity is a chronic oxidative stress state that is associated with metabolic and physiological changes present in human organism that emerge pathologies mentioned. To prevent excessive reactive oxygen species (ROS) generated, the organisms have a complex system of defense mechanisms including enzymatic and non-enzymatic detoxification. The present study utilized SWISS mice fed with high fat (HF) diet, an experimental model of obesity, treated with CAPE, an isolated compound from propolis that present many biological activities, at doses of 13 and 30 mg / kg body weight and two treatment times, 15 and 22 days. In this study, the responses of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) and glutathione reductase (GR) were analyzed in liver and adipose tissues. In addition, other important parameters were performed, such as lipid peroxidation, hydrogen peroxide (H2O2) content, liver enzyme activity ?-GT and the weight gain, relative weight of liver and adipose tissue (%). The results showed that CAPE did not interfere with the daily weight gain of animals. The high fat diet and treatment with CAPE did not lead to significant changes in serum liver enzyme ?-GT. The results obtained in response to oxidative stress are in agreement with the literature that have CAPE as a potent antioxidant, being able to improve the activity of some antioxidant enzymes in the tissues studied. In liver, it was observed that the dose of 13 mg / kg body weight was more effective preventing oxidative stress induced by obesity, the production of hydrogen peroxide and, consequently, lipid peroxidation. In adipose tissue, the dose of 30 mg / kg body weight improved the activity of GSH-Px, but did not affect significantly the activity of other enzymes evaluated. Thus, we can suggest that CAPE at a dose of 13 mg / kg body weight for 15 days and 30 mg / kg body weight for 22 days improves the response to oxidative stress induced by obesity in the liver and adipose tissue, respectively

ASSUNTO(S)

enzymes obesity. antioxidants enzimas extresse oxidativo obesidade. oxidative stress antioxidantes

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