METABOLISM OF -HYDROXY-[1-14C] BUTYRATE BY RAT BRAIN: RELATIONSHIP TO THE KREBS CYCLE AND METABOLIC COMPARTMENTATION OF AMINO ACIDS

来自 Wiley

阅读量:

30

作者:

JD DohertyRH Roth

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摘要:

Abstract— Ninhydrin decarboxylation experiments were carried out on the labelled amino acids produced following intraventricular injection of either γ-hydroxy-[1-14C]butyric acid (GHB) or [1-14C] succinate. The loss of isotope (as 14CO2) was similar for both substances. The [1-14C]GHB metabolites lost 75% of the label and the [1-14C] succinate metabolites lost 68%. This observation gives support to the hypothesis that the rat brain has the enzymatic capacity to metabolize [1-14C]GHB to succinate and to amino acids that have the isotope in the carboxylic acid group adjacent to the a-amino group. These results also indicate that the label from [1-14C]GHB does not enter the Krebs cycle as acetate. The specific activity ratio of radiolabelled glutamine to glutamic acid was determined in order to evaluate which of the two major metabolic compartments preferentially metabolize GHB. It was foun

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DOI:

10.1111/j.1471-4159.1978.tb10460.x

被引量:

127

年份:

1978

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