Parâmetros bioquímicos de equinos submetidos à simulação de prova de enduro recebendo dietas com adição de óleo de soja
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Data
2010-02-01
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Editor
Sociedade Brasileira de Zootecnia
Resumo
Com o objetivo de verificar o efeito da adição de níveis crescentes de óleo no concentrado sobre a atividade plasmática das enzimas creatina quinase (CK), aspartato aminotransferase (AST) e lactato desidrogenase (LDH) como indicativo de metabolismo energético, foram fornecidas dietas experimentais compostas de cinco níveis de óleo (controle, 6, 12, 18 e 24% do concentrado). Utilizaram-se 20 equinos da raça Árabe, peso médio de 400 kg, submetidos a prova de enduro de 80 km em esteira rolante. O enduro foi dividido em quatro anéis de 20 km, com duração média de 1 hora e dez minutos. A adição de óleo e a distância percorrida tiveram efeitos sobre as variáveis AST, CK e LDH, que apresentaram as respectivas expressões: AST (7,045-0,2292x+0,007991x2+0,008517z- 0,0003282xz), CK (8,06-,07020x+0,05546x2-0,001262x3+0,01204z+0,0006207xz) e LDH (6,624-0,3522x+0,03448x2-0,0008382x3+0,02401z-0,0007489xz) . O óleo é uma importante e bem aproveitada fonte de energia para equinos em exercício, pois sua adição na dieta de animais submetidos a prova de enduro promoveu alteração metabólica que favorece a produção de energia. O metabolismo animal poupou suas reservas energéticas oriundas da glicose, favorecendo a utilização do óleo. A menor atividade plasmática das enzimas AST, CK e LDH com a adição de óleo nas dietas indica direcionamento do metabolismo energético para a β-oxidação. Como apresentam várias isoenzimas, as enzimas estudadas atuam amplamente no metabolismo energético, favorecendo a constante reposição de ATP ao longo do exercício.
The objective of this study was to verify the effect of increasing soybean oil addition levels in the concentrate, on the enzymatic activity CK (Creatine Kinase), LDH (Lactate Dehydrogenase), AST (Astarte aminostrafase), as an indication of energetic metabolism. Compond experimental diets were given with five oil levels (control, 6, 12, 18 and 24% concentrate). Twenty Arabian equines, average weight 400 kg were submitted to a 80 km endurance race on a treadmill. The endurance was divided into four 20 km rings with an average duration of one hour and 10 minutes. A significant effect of oil addition and the covered distance was observed on the variables AST, CK, LDH and they present the respective expressions AST and (7,045-0,2292x+0,007991x2+ 0,008517z- 0,0003282xz) CKand(8,06-,07020x+0,05546x2-0,001262x3+0,01204z+0,0006207xz) , LDH and (6,624-0,3522x+0,03448x2-0,0008382x3+0,02401z-0,0007489xz) . The oil is an important and well-used energy source for horses in exercise, because its addition to the diet of animals submitted to endurance test cause metabolic alteration that favored energy production. The animal metabolism save its energy reserves derived from glucose and favored the use of the oil. The smaller plasmatic activity of the AST, CK and LDH, enzymes with the addition of oil to the diets indicated directioning of the energy metabolism to β-oxidation. As the enzymes show several isoenzymes, it was concluded that the enzymes studied act widely on the energetic metabolism, favoring constant ATP reposition during all exercise.
The objective of this study was to verify the effect of increasing soybean oil addition levels in the concentrate, on the enzymatic activity CK (Creatine Kinase), LDH (Lactate Dehydrogenase), AST (Astarte aminostrafase), as an indication of energetic metabolism. Compond experimental diets were given with five oil levels (control, 6, 12, 18 and 24% concentrate). Twenty Arabian equines, average weight 400 kg were submitted to a 80 km endurance race on a treadmill. The endurance was divided into four 20 km rings with an average duration of one hour and 10 minutes. A significant effect of oil addition and the covered distance was observed on the variables AST, CK, LDH and they present the respective expressions AST and (7,045-0,2292x+0,007991x2+ 0,008517z- 0,0003282xz) CKand(8,06-,07020x+0,05546x2-0,001262x3+0,01204z+0,0006207xz) , LDH and (6,624-0,3522x+0,03448x2-0,0008382x3+0,02401z-0,0007489xz) . The oil is an important and well-used energy source for horses in exercise, because its addition to the diet of animals submitted to endurance test cause metabolic alteration that favored energy production. The animal metabolism save its energy reserves derived from glucose and favored the use of the oil. The smaller plasmatic activity of the AST, CK and LDH, enzymes with the addition of oil to the diets indicated directioning of the energy metabolism to β-oxidation. As the enzymes show several isoenzymes, it was concluded that the enzymes studied act widely on the energetic metabolism, favoring constant ATP reposition during all exercise.
Descrição
Palavras-chave
β-oxidation, Energy, Horse, oil, Performance, β-oxidaηão, Cavalo, Desempenho, Energia, Óleo
Como citar
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 39, n. 2, p. 313-319, 2010.