Efeito da glutamina, do glutamato e de nucleotídeos sobre o Turnover do carbono ( 13C) em tecidos de leitões desmamados
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Data
2012-12-10
Autores
Amorim, Alessandro Borges [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
As consequências do desmame precoce são, alterações nas características das vilosidades e das criptas do intestino delgado dos leitões, comprometendo a eficiência dos processos de digestão e de absorção de nutrientes. Foram realizados dois experimentos com o objetivo de verificar a influência das dietas no turnover do carbono e na morfologia da mucosa do duodeno e jejuno de leitões desmamados aos 21 dias de idade. As dietas foram sem glutamina, glutamato e nucleotídeos (DC); contendo 1% de glutamina (DG); contendo 1% de glutamato (DAG) e contendo 1% de nucleotídeos (DN). No primeiro experimento foram utilizados 123 animais, sendo abatidos três leitões no dia 0 e três animais de cada tratamento nos dias 1, 2, 4, 5, 7, 9, 13, 20, 27 e 49 após o desmame, para coleta de amostras da mucosa do duodeno e jejuno, que foram analisadas quanto à composição isotópica de 13C e mensurada a velocidade de substituição do carbono no tempo. No segundo experimento foram utilizados 65 animais, em delineamento experimental em blocos ao acaso, com arranjo fatorial dos tratamentos 4 x 3 +1 (quatro dietas: DC, DG, DAG e DN, três épocas de abate: 7, 14 e 28 dias pós desmame e abate no desmame: dia 0), para análises morfológicas. Os valores da meia-vida do carbono para o duodeno foram 7,3; 7,6; 6,2 e 5,2 dias e para o jejuno de 7,1; 6,7; 6,2 e 4,9 dias para as DC, DG, DAG e DN, respectivamente. As dietas não alteram a altura das vilosidades (AV), profundidade das criptas (PC) e relação altura das vilosidades: profundidade das criptas (AV:PC), com exceção da DN que determinou maior PC no duodeno, quando comparado com a DAG. A inclusão de 1% de nucleotídeos ou de 1% de glutamato nas dietas de leitões acelera o turnover do carbono da mucosa intestinal, sugerindo sua recuperação mais rápida no período...
The consequences of early weaning are the changes in the characteristics of the small intestine villus and crypts of piglets, reduce the efficiency of digestion and absorption of nutrients. Two experiments were conducted in order to study the influence of diets on carbon turnover and morphology of the mucosa of the duodenum and jejunum of piglets weaned at 21 days of age. The diets were: Diets without glutamine, glutamate and nucleotides (DC); containing 1% of glutamine (DG); containing 1% of glutamate (DAG) and containing 1% of nucleotides (DN). In the first experiment a hundred twenty three animals were used and three of them were slaughtered at day 0 and three animals from each diets on days 1, 2, 4, 5, 7, 9, 13, 20, 27 and 49 after weaning, for collecting samples of mucosa duodenum and jejunum was taken, which were analysis for the isotopic composition ‰13C and measured the time of carbon substitution. In the second experiment, sixty five animals were used in a randomized complete blocks design experiment with a 4x3x1 factorial arrangement of diets (four diets: DC, DG, DAG and DN; three slaughter ages: 7,14 and 28 days post weaning and slaughter at weaning day: day 0) for morphology analysis. The values of carbon half-life into the duodenum were 7.3, 7.6, 6.2 and 5.2 and into the jejunum were 7.1, 6.7, 6.2 and 4.9 for DC, DG, DAG and DN, respectively. Diets do not change the villus height (VH), crypt depth (PC) and villus:crypt ration (AV:PC), except that DN determined that most PC duodenum compared with the DAG. The inclusion of 1% of nucleotides or 1% of glutamate in the diet of piglets accelerates the carbon turnover of intestinal mucosa, suggesting a faster recovery post-weaning, however, was not evaluated any effect on the action of products by results of morphology analysis, indicating that the technique... (Complete abstract click electronic access below)
The consequences of early weaning are the changes in the characteristics of the small intestine villus and crypts of piglets, reduce the efficiency of digestion and absorption of nutrients. Two experiments were conducted in order to study the influence of diets on carbon turnover and morphology of the mucosa of the duodenum and jejunum of piglets weaned at 21 days of age. The diets were: Diets without glutamine, glutamate and nucleotides (DC); containing 1% of glutamine (DG); containing 1% of glutamate (DAG) and containing 1% of nucleotides (DN). In the first experiment a hundred twenty three animals were used and three of them were slaughtered at day 0 and three animals from each diets on days 1, 2, 4, 5, 7, 9, 13, 20, 27 and 49 after weaning, for collecting samples of mucosa duodenum and jejunum was taken, which were analysis for the isotopic composition ‰13C and measured the time of carbon substitution. In the second experiment, sixty five animals were used in a randomized complete blocks design experiment with a 4x3x1 factorial arrangement of diets (four diets: DC, DG, DAG and DN; three slaughter ages: 7,14 and 28 days post weaning and slaughter at weaning day: day 0) for morphology analysis. The values of carbon half-life into the duodenum were 7.3, 7.6, 6.2 and 5.2 and into the jejunum were 7.1, 6.7, 6.2 and 4.9 for DC, DG, DAG and DN, respectively. Diets do not change the villus height (VH), crypt depth (PC) and villus:crypt ration (AV:PC), except that DN determined that most PC duodenum compared with the DAG. The inclusion of 1% of nucleotides or 1% of glutamate in the diet of piglets accelerates the carbon turnover of intestinal mucosa, suggesting a faster recovery post-weaning, however, was not evaluated any effect on the action of products by results of morphology analysis, indicating that the technique... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Isótopos estáveis, Aminoacidos na nutrição animal, Glutamina, Alimentos - Aditivos, Suino, Glutamato monossódico, Nucleotídeos, Glutamine, Stable isotopes
Como citar
AMORIM, Alessandro Borges. Efeito da glutamina, do glutamato e de nucleotídeos sobre o Turnover do carbono ( 13C) em tecidos de leitões desmamados. 2012. xii, 97 f. Tese (doutorado) - Univerdade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnia de Botucatu, 2012.