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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Efecto de la atorvastatina sobre la enfemedad grasa del hígado inducida en pollos mediante una dieta aterogénica

Martín Castillo, Antonia 27 February 2008 (has links)
Este trabajo valora el efecto de la dieta y el tratamiento con atorvastatina sobre la EGHNA inducida en pollos mediante una dieta hiperlipémica, empleando técnicas de análisis bioquímico, histológico, microscopía electrónica, técnicas inmunocitoquímicas y cuantificaciones histológicas. Utilizamos 100 pollos de la raza White Leghorn, se dividieron al azar en dos grupos control e hiperlipémico en una primera fase de inducción de hígado graso (3 meses) y en una segunda fase de otros 3 meses los animales hiperlipémicos fueron divididos en los grupos de progresión con dieta hiperlipémica, regresión, regresión farmacológica y progresión farmacológica. La retirada de la dieta y/o el tratamiento con atorvastatina reduce la esteatosis hepática, la inflamación y la lesión hepatocelular. Se constata una mayor actividad de la enfermedad en los grupos de progresión respecto a los de regresión y una menor actividad en los animales tratados respecto a los no tratados. / The aim of the present study was to determinate the effect of diet and atorvastatin on NAFLD induced by hyperlipidemic diet in experimental animals. We carried out serum biochemical analysis, histology, electron microscopy and immunohistochemical techniques and histological quantifications. We used one-hundred white Leghorn chickens. The chickens were randomly assigned to 2 Kinds of diet: a standard diet and a hyperlipidemic diet. After a three-month induction period the chickens were randomly divided in four groups and were breeding for another three-month period with different diets. Thus, the groups of our study were as follows: healthy control, hyperlipidemic progression, spontaneous regression, pharmacological regression and pharmacological progression.The removal diet and/or atorvastatin treatment decreased the steatosis, inflammation and hepatocelular lesion grade in the liver. We have observed a greater NASH Activity Score in progression groups than regression groups and lower activity in the treatment groups with regard to non-treated groups.
2

Efeitos do ômega-3 na parede arterial de coelhos albinos (Oryctolagus cuniculus) submetidos à aterosclerose experimental / Effects of omega-3 in the arterial wall of rabbits (Oryctolagus cuniculus) underwent experimental atherosclerosis

Martins, Josefa Sileda 17 June 2011 (has links)
The nutraceutical omega 3 fatty acid, which has been used to prevent cardiovascular disease; on the other hand, atherosclerosis is the leading cause of morbidity and mortality, becoming myocardial infarction and strokes the main consequences. Objective: This study aimed to verify the preventive effects of omega-3 in the formation of atherosclerosis, inducing hyperlipidemic diet in rabbits to quantify the atherosclerotic involvement of the arterial lumen and to evaluate serum lipid levels (total cholesterol, fractions, triglycerides and HDL). Methods: 21 male rabbits New Zealand white race were randomized into three groups with seven animals, namely: control group (G1) where the animals received food and water ad labium; group hyperlipidemic (G2) food and water ad labium, 20 ml of chicken egg yolk divided in two doses and treated group (G3) that in addition to 20 ml of yolk, ingested 221 mg / kg body weight of omega-3 as well as food and water ad labium. The blood was collected to determine serum and after 99 days of the experiment, animals were euthanized for removal of debris following: aortic arch, right common carotid artery and right femoral artery. The results were compared using statistical methods of ANOVA, and Kolmogorov-Smirnorv. Results: There was no decrease in serum total cholesterol and fractions, and triglyceride did not increase HDL. There was thickening of the sub endothelial layer and formation of foam cells in G1 and G2. Conclusion: The Omega has no preventive effect in reducing atherosclerotic plaques; there was increased in the arterial lumen at 57.55%. / Fundação de Amparo a Pesquisa do Estado de Alagoas / O ômega-3 é um ácido graxo nutracêutico, que tem sido utilizado para prevenir as doenças cardiovasculares, das quais a aterosclerose é a principal causa de morbidade e mortalidade, tornando o infarto do miocárdio e o acidente vascular encefálico suas principais consequências. Objetivo: Este trabalho teve como objetivos verificar a existência de efeitos preventivos do ômega-3 na formação da doença aterosclerótica, através da indução de dieta hiperlipidêmica em coelhos, quantificar o comprometimento aterosclerótico da luz arterial bem como, analisar os níveis lipídicos séricos (colesterol total, frações, triglicerídeo e HDL). Material e Método: 21 coelhos albinos, machos da raça Nova Zelândia foram distribuídos aleatoriamente em três grupos com sete animais, a saber: Grupo Controle (G1) cujos animais receberam ração e água ad libitum; Grupo Hiperlipidêmico (G2) ração e água ad libitum, mais 20 ml de gema de ovo de galinha em dividida em duas tomadas e o Grupo Tratado (G3) que além dos 20 ml de gema, ingeriu 221 mg/kg/peso de ômega-3, bem como ração e água ad libitum. O sangue foi coletado para verificar os níveis séricos e após 99 dias de experimento, os animais foram submetidos à eutanásia para retirada dos seguintes fragmentos: arco aórtico, artéria carótida comum direita e artéria femoral direita. Os resultados foram comparados pelos métodos estatísticos ANOVA, e teste de Kolmogorov-Smirnorv. Resultados: Não houve diminuição dos níveis séricos do colesterol total, e frações, o triglicerídeo e não aumentou o HDL. Houve espessamento da camada subendotelial e formação de células espumosas, nos grupos G1 e G2. Conclusão: O ômega não tem efeito preventivo na redução das placas ateromatosas, houve aumento do comprometimento da luz arterial em 57,55%.

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