This experiment was conducted to determine if changing the amount of ideal aminoacids (meaning the amount of amino acids necessary to supply all the animal's needswithout excesses or deficiencies of any single amino acid), in relation to caloric intakewill change nitrogen metabolism and weight loss in obese mature dogs. Informationprovided by this experiment can be used to formulate canine diets emphasizing weightloss in older animals.Six moderately obese mature female crossbred hounds were fed diets varying in theirratio of lysine:calories (Lysine % : Mcal ME/g) (2.2, 3.0, and 3.8) in a 3 x 3 replicatedLatin square design. Increasing the lysine:calorie of the diets linearly increased theamount of nitrogen absorbed. It did not, however, significantly affect blood chemistryvalues. Protein turnover exhibited a positive linear trend with increasing ratio and proteindegradation showed a strong quadratic change with the lowest point of degradationoccurring with the diet containing a 3.0 lysine:calorie ratio. Plasma urea and creatinineexcretion demonstrated quadratic tendencies with the two highest values occurring withthe diets containing lysine:calorie of 2.2 and 3.8, reflecting changes in muscle proteinbreakdown while nitrogen was retained in the body. Caloric restriction did not result inloss of lean mass as much as a loss of fat mass. By increasing the quality of protein fedas a percentage of caloric intake, lean muscle mass was conserved during periods ofcaloric restriction.

Made available in DSpace on 2016-05-17T16:51:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-09-09. Added 1 bitstream(s) on 2016-05-17T16:55:14Z : No. of bitstreams: 1 000864282.pdf: 546066 bytes, checksum: a1d461c6691252faf4f72e2d21d4353d (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Obesity is a nutritional disease becoming more common in small animals, whose prevalence has reached epidemic proportions. This disorder has been associated with various diseases, affecting the quality of life and reducing the longevity of animals. In humans it is known that obesity is strongly associated with increased oxidative stress. A literature review on oxidative stress in obese dogs was conducted using two databases (CAPES Portal and PubMed) and was located just two experimental study in dogs that did not prove oxidative stress been described in humans. In this sense was a cross-sectional observational study with control to confirm our hiopótese that canine obesity causes sitêmico oxidative stress. For such a control group consisting of 19 healthy dogs (body condition score of 4 to 5) was compared to a group consisting of 25 obese dogs (body condition score of 8 and 9). Of both groups were measured the plasma oxidative stress markers (oxidative stress index (OSI), total oxidant concentration (TOC), total antioxidant capacity, lipid peroxidation, uric acid, albumin and gamma glutamyl transferase). t was possible to prove that there is an increase of systemic oxidative stress in canine obesity, characterized by increased lipid peroxidation and IEO associated with a higher concentration of TOC

Orientador:Paulo César Ciarlini / Co-orientador:Mario Jefferson Quirino Louzada / Banca:Fabiano Antonio Cadioli / Banca:Aureo Evangelista Santana / Resumo:obesidade é uma doença nutricional cada vez mais comum em animais de companhia, cuja prevalência já atinge proporções epidêmicas. Este distúrbio tem sido associado com diversas enfermidades, afetando a qualidade de vida e reduzindo a longevidade dos animais. Em humanos já se sabe que a obesidade está fortemente associada ao aumento do estresse oxidativo. Foi realizada uma revisão bibliográfica sobre o estresse oxidativo em cães obesos, utilizando-se dois bancos de dados (Portal CAPES e PubMed), tendo sido localizado apenas dois estudo experimentais na espécie canina que não comprovam o estresse oxidativo já descrito em humanos. Neste sentido foi realizado estudo observacional transversal com controle para confirmar a nossa hiopótese de que a obesidade canina causa estresse oxidativo sitêmico. Para tal, um grupo controle constituído de 19 cães saudáveis (escore corporal de 4 a 5) foi comparado com um grupo constituído de 25 cães obesos (escore corporal de 8 e 9). De ambos os grupos foram mensurados os marcadores de estresse oxidativo plasmático (índice de estresse oxidativo (IEO), concentração oxidante total (TOC), capacidade antioxidante total, peroxidação lipídica, ácido úrico, albumina e gamaglutamil transferase). Foi possível comprovar que ocorre aumento do estresse oxidativo sistêmico na obesidade canina, caracterizado pelo aumento da peroxidação lipídica e do IEO associado a maior concentração de TOC / Abstract:Obesity is a nutritional disease becoming more common in small animals, whose prevalence has reached epidemic proportions. This disorder has been associated with various diseases, affecting the quality of life and reducing the longevity of animals. In humans it is known that obesity is strongly associated with increased oxidative stress. A literature review on oxidative stress in obese dogs was conducted using two databases (CAPES Portal and PubMed) and was located just two experimental study in dogs that did not prove oxidative stress been described in humans. In this sense was a cross-sectional observational study with control to confirm our hiopótese that canine obesity causes sitêmico oxidative stress. For such a control group consisting of 19 healthy dogs (body condition score of 4 to 5) was compared to a group consisting of 25 obese dogs (body condition score of 8 and 9). Of both groups were measured the plasma oxidative stress markers (oxidative stress index (OSI), total oxidant concentration (TOC), total antioxidant capacity, lipid peroxidation, uric acid, albumin and gamma glutamyl transferase). t was possible to prove that there is an increase of systemic oxidative stress in canine obesity, characterized by increased lipid peroxidation and IEO associated with a higher concentration of TOC / Mestre