Efeito do resíduo da moagem a seco de milho micropulverizado no metabolismo lipídico, na glicemia e na composição corporal em ratos alimentados com dieta de cafeteria

• Autor(a) principal: Moraes, Vanessa Barbosa de
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/2728
• topic: Resíduo de milho; Obesidade; Fibra alimentar; Residue of corn; Obesity; Dietary fiber; CNPQ::CIENCIAS DA SAUDE::NUTRICAO

The increased prevalence of overweight and obesity is related to sedentary lifestyle and excess food intake, increased intake of saturated fat and simple carbohydrate and reduction in consumption of fruits, vegetables and complex carbohydrates. The intake of dietary fiber may reduce the absorption of fat, increase satiety, the amount of fecal weight and accelerate intestinal transit. The fibrous residue of corn consists of the fraction of the pericarp of the corn, may be a source of dietary fiber can reduce the digestion and absorption of lipids by lowering the weight gain and accumulation of body fat. The objective was to evaluate the functional effect of the residue of the dry milling of microfine corn food intake, body weight gain, visceral fat deposition, liver lipids, body composition, fecal composition and weight, blood glucose and lipid profile in rats fed cafeteria diet. Samples of residue of corn were collected randomly and provided by the Office of the Cooperative Corn Processing Integrated, located in Andirá, PR. We used 52 rats (4 groups, n = 13) male Wistar, adult, with initial weight of 249 ± 14 g. The animals received AIN-93M diet (Group 1) and the cafeteria diet (Groups 2, 3 and 4), whose ingredients were commercial chow, sweet biscuit, potato straw, milk chocolate, bacon and chicken-liver paté. In groups 3 and 4was added the residue of corn in the proportion of 100 and 50% of the dietary fiber content of AIN-93M, respectively. During the experimental period body weight gain and food consumption were monitored, the feces were collected during the last five days of the trial. After 35 days was performed euthanasia, collected tissues, blood and carcasses for analysis. Data were analyzed by the Tukey test for comparisons between three or more independent groups, the significance level of p <0.10. The cafeteria group had weight gain of 25.9%, while the groups receiving corn residue concentrations of 100 and 50% gained 20.8% and 22.0% respectively, showing that the residue of corn was effective in the modulation of weightgain. Food intake did not differ between groups. The animals that received the cafeteria diet had greater accumulation of visceral fat, however, the groups receiving corn fiber had lower deposition of fat visceral, 48.8, 36.0, 43.4%, respectively for groups cafeteria, cafeteria + 100% and 50% residue of corn. The addition of the corn residue to the cafeteria diet did not change statistically the lipid profile of rats, however, favored smaller accumulation of lipids in the liver, being 1.46, 1.37 and 1.38 mg / g respectively for groups cafeteria, cafeteria + 100% and 50% of corn residue. In the study there was no difference at 10% significance for body composition. The weight of wet and dry feces was different for all groups, and the presence of 100% residue of corn has increased the weight of wet and dry stool. Groups cafeteria + 100% and 50% of residue of corn had higher concentrations of nitrogen and lipids in the feces. The results alowed the conclusion that the residue of the dry milling of microfine corn may be an alternative source of dietary fiber in the control of weight gain, accumulation of visceral fat and lipids in the liver, with the addition of 100% of residue was more efficient in reducing the changes caused by the cafeteria diet.