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  • Title: Dietary obesity shows adaptations of amino-acid metabolism on enzyme activities to save amino nitrogen.
    Author: Serra F, Gianotti M, Palou A, Pons A.
    Journal: Biochem Int; 1991 Jul; 24(4):769-76. PubMed ID: 1686827.
    Abstract:
    An increased aspartate transaminase in the liver of dietary (post-cafeteria) obese rats was found. It was consistent with the functionality of the malate-aspartate shuttle, that could be responsible for enhancement of metabolic efficiency. The muscle and intestine of obese rats showed a greater capacity for alanine and glutamine synthesis than the controls. Furthermore, enterocyte adaptations in the obese rats indicated higher capabilities for the intake of nitrogen than in the controls. In conclusion, the pattern of amino-acid enzyme activities reflected adaptations to keep from amino nitrogen depletion in dietary obesity which were compatible with an enhancement of the metabolic efficiency.
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