Impacto da desnutrição intrauterina na homeostase glicêmica e na capacidade aeróbia de ratos
Carregando...
Arquivos
Data
2011-11-01
Autores
Cambri, Lucieli Teresa [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Este estudo teve por objetivo analisar as alterações que a desnutrição fetal provoca na homeostase glicêmica e na capacidade aeróbia, e quais alterações persistem na idade adulta, mesmo após a realimentação, em modelo experimental utilizando ratos. Adicionalmente, visou verificar a susceptibilidade de animais precocemente desnutridos aos efeitos metabólicos da sobrecarga de frutose. Ratas Wistar adultas (90 dias) foram alimentadas durante a prenhez com dieta balanceada (B) - 17% proteína ou hipoproteica (H) - 6% proteína. Imediatamente após o nascimento, as crias do sexo masculino foram distribuídas em grupos de acordo com o regime alimentar até o final do experimento: Balanceada: dieta B durante todo o período experimental; Balanceada/Frutose: dieta B até o nascimento e dieta rica em frutose (F) - 60% frutose até o final do experimento; Hipoproteica/Balanceada: dieta H até o nascimento e dieta B até o final do experimento; Hipoproteica/Frutose: dieta H até o nascimento e dieta F até o final do experimento. Realizou-se duas séries de experimentos, a primeira observando os animais até a idade adulta (90 dias) e a segunda até a idade jovem (60 dias). Os animais foram avaliados quanto a: tolerância à glicose (teste de tolerância à glicose); sensibilidade à insulina (teste de tolerância à insulina) e capacidade aeróbia (teste da máxima fase estável de lactato - MFEL). Foram também analisadas concentrações séricas de glicose, triglicerídeos, colesterol total, LDL-C, HDL-C, ácidos graxos livres, proteínas totais, albumina, concentrações de glicogênio e lipídios totais no fígado; peso e concentração de lipídios totais do tecido adiposo das regiões mesentérica, retroperitonial e subcutânea e metabolismo da glicose pelo músculo sóleo (captação e oxidação da glicose, síntese e concentração de glicogênio)... (Resumo completo, clicar acesso eletrônico abaixo
This study aimed to analyze the alterations that the fetal malnutrition causes in the glycemic homeostasis and in the aerobic capacity, and if this changes persist into adulthood, after the nutritional recovery in an experimental model using rats. Additionally, it aimed to verify the susceptibility of early malnourished animals metabolic effects of fructose overload. Pregnant Wistar rats were fed with a balanced (B) diet or a low-protein (L) diet. After birth and until the end of the experiment, the male offspring were distributed into four groups according to the diet received: B: B diet during the whole experiment; balanced/fructose (BF): B diet until birth and fructose-rich (F) diet afterwards; low protein/balanced (LB): L diet until birth and B diet afterwards; low protein/fructose (LF): L diet until birth and F diet afterwards. Two series of experiments were performed, in the first the animals were observed until adulthood (90 days) and in the second, until young age (60 days). The animals were evaluated for: glucose tolerance (glucose tolerance test), insulin sensitivity (insulin tolerance test) and aerobic capacity (maximal lactate steady state - MLSS). Serum concentration of glucose, triglycerides, total cholesterol, LDL-C, HDL-C, free fatty acids, total proteins and albumin, liver glycogen and liver total lipids, weight and total lipids in adipose tissue in mesenteric, retroperitoneal and subcutaneous regions, and glucose metabolism by soleous muscle (glucose uptake and oxidation, glycogen concentration and synthesis) were analyzed in two conditions: rest and after acute physical exercise in the intensity of MLSS. The results of the first series of experiments show that early high fructose consumption impaired body weight gain and reduced adipose tissue weight of some regions, independently of the nutritional... (Complete abstract click electronic access below)
This study aimed to analyze the alterations that the fetal malnutrition causes in the glycemic homeostasis and in the aerobic capacity, and if this changes persist into adulthood, after the nutritional recovery in an experimental model using rats. Additionally, it aimed to verify the susceptibility of early malnourished animals metabolic effects of fructose overload. Pregnant Wistar rats were fed with a balanced (B) diet or a low-protein (L) diet. After birth and until the end of the experiment, the male offspring were distributed into four groups according to the diet received: B: B diet during the whole experiment; balanced/fructose (BF): B diet until birth and fructose-rich (F) diet afterwards; low protein/balanced (LB): L diet until birth and B diet afterwards; low protein/fructose (LF): L diet until birth and F diet afterwards. Two series of experiments were performed, in the first the animals were observed until adulthood (90 days) and in the second, until young age (60 days). The animals were evaluated for: glucose tolerance (glucose tolerance test), insulin sensitivity (insulin tolerance test) and aerobic capacity (maximal lactate steady state - MLSS). Serum concentration of glucose, triglycerides, total cholesterol, LDL-C, HDL-C, free fatty acids, total proteins and albumin, liver glycogen and liver total lipids, weight and total lipids in adipose tissue in mesenteric, retroperitoneal and subcutaneous regions, and glucose metabolism by soleous muscle (glucose uptake and oxidation, glycogen concentration and synthesis) were analyzed in two conditions: rest and after acute physical exercise in the intensity of MLSS. The results of the first series of experiments show that early high fructose consumption impaired body weight gain and reduced adipose tissue weight of some regions, independently of the nutritional... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Nutrição, Desnutrição fetal, Síndrome metabólica, Malnutrition, Metabolic syndrome
Como citar
CAMBRI, Lucieli Teresa. Impacto da desnutrição intrauterina na homeostase glicêmica e na capacidade aeróbia de ratos. 2011. 148 f. Tese - (doutorado) - Universidade Estadual Paulista, Instituto de Biociências de Rio Claro, 2011.