Abstract
1. Rates of appearance and disappearance of total ketone bodies were determined in normal, starved and alloxan-diabetic rats by measuring specific radioactivities and concentrations of blood acetoacetate and 3-hydroxybutyrate at different times after injection of 3-hydroxy[14C]butyrate. 2. The mean rates of appearance were 1·7, 4·2 and 10·9μmoles/min./100g. body wt. respectively for normal, starved and alloxan-diabetic rats. The rates of disappearance were of the same order of magnitude as the rates of appearance. 3. There was a direct correlation between the rates of appearance and disappearance and the blood concentrations of the ketone bodies. 4. The results indicate that in the rat increased ketone-body production is paralleled by increased ketone-body utilization and that the raised ketone-body concentration in the blood in starvation and alloxan-diabetes is due to a slight imbalance between the rates of production and utilization. 5. The findings are discussed in relation to the concept that ketone bodies can serve as fuels of respiration when the supply of carbohydrate is limited.
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- Burch R. E., Triantafillou D. Acetoacetyl coenzyme A deacylase activity in liver mitochondria from fed and fasted rats. Biochemistry. 1968 Mar;7(3):1009–1013. doi: 10.1021/bi00843a019. [DOI] [PubMed] [Google Scholar]
- KREBS H. A. The physiological role of the ketone bodies. Biochem J. 1961 Aug;80:225–233. doi: 10.1042/bj0800225. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Krebs H. A., Hems R., Weidemann M. J., Speake R. N. The fate of isotopic carbon in kidney cortex synthesizing glucose from lactate. Biochem J. 1966 Oct;101(1):242–249. doi: 10.1042/bj1010242. [DOI] [PMC free article] [PubMed] [Google Scholar]
- NORDMANN R., GAUCHERY O., DU RUISSEAU J. P., THOMAS Y., NORDMANN J. Chromatographie sur papier des acides organiques non volatils des liquides biologiques. I. L'urine; technique chromatographique. Bull Soc Chim Biol (Paris) 1954;36(10):1461–1471. [PubMed] [Google Scholar]
- SCOW R. O., CHERNICK S. S. Hormonal control of protein and fat metabolism in the pancreatectomized rat. Recent Prog Horm Res. 1960;16:497–545. [PubMed] [Google Scholar]
- Söling H. D., Kattermann R., Schmidt H., Kneer P. The redox state of NAD+-NADH systems in rat liver during ketosis, and the so-called "triosephosphate block". Biochim Biophys Acta. 1966 Jan 25;115(1):1–14. doi: 10.1016/0304-4165(66)90042-0. [DOI] [PubMed] [Google Scholar]
- WILLIAMSON D. H., MELLANBY J., KREBS H. A. Enzymic determination of D(-)-beta-hydroxybutyric acid and acetoacetic acid in blood. Biochem J. 1962 Jan;82:90–96. doi: 10.1042/bj0820090. [DOI] [PMC free article] [PubMed] [Google Scholar]
- WILLIAMSON J. R., KREBS H. A. Acetoacetate as fuel of respiration in the perfused rat heart. Biochem J. 1961 Sep;80:540–547. doi: 10.1042/bj0800540. [DOI] [PMC free article] [PubMed] [Google Scholar]
- WRENSHALL G. A. Working basis for the tracer measurement of transfer rates of a metabolic factor in biological systems containing compartments whose contents do not intermix rapidly. Can J Biochem Physiol. 1955 Nov;33(6):909–925. [PubMed] [Google Scholar]
- Williamson D. H., Bates M. W., Krebs H. A. Activity and intracellular distribution of enzymes of ketone-body metabolism in rat liver. Biochem J. 1968 Jul;108(3):353–361. doi: 10.1042/bj1080353. [DOI] [PMC free article] [PubMed] [Google Scholar]