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  • Title: C6--C10-dicarboxylic aciduria in starved, fat-fed and diabetic rats receiving decanoic acid or medium-chain triacylglycerol. An in vivo measure of the rate of beta-oxidation of fatty acids.
    Author: Mortensen PB.
    Journal: Biochim Biophys Acta; 1981 May 22; 664(2):349-55. PubMed ID: 7248330.
    Abstract:
    Administration of decanoic acid to rats resulted not only in elevated urinary excretions of the C10-dicarboxylic acid (sebacic acid), but also in highly elevated excretions of the beta-oxidation products C8- and C6-dicarboxylic acids (suberic and adipic acids). Activation of the lipid metabolism by starvation, fat-feeding and experimental diabetes increased the excretions of adipic acid and decreased the excretions of sebacic acid, i.e. the rate of oxidation of fatty acids was correlated to the adipic : sebacic acid ratio in urine. Compared with nondiabetic unstarved rats the adipic : sebacic acid ratio was elevated 2--3-, 8--16-, 5--19-, and 22--88-times in rats which were, respectively, starved for 2 days, 4 days, on a fat-diet for 4 days, and ketotic due to streptozotocin-induced diabetes. All rats with ratios above 10 were ketotic (urinary excretions of 3-hydroxybutyric acid over 500 microgram/mg creatinine) and all rats with ratios below 4 were nonketotic, while ketosis was a variable finding in rats with intermediary ratios. Similar changes in the ratio of excreted dicarboxylic acids were found when medium-chain triacylglycerols were fed instead of decanoic acid.
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