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Metabolism of ubiquinone in relation to thyroxine status.

Abstract
1. Under conditions of thyrotoxicosis induced by feeding rats with iodinated casein, ubiquinone concentration was found to increase in the liver by increased synthesis and by partly decreased catabolism leading to its accumulation. The increased ubiquinone was found primarily in the mitochondrial and supernatant fractions. 2. Supplementing the diet with thyroxine, at less than toxic doses, also increased the synthesis and the concentration of ubiquinone in the liver. 3. In the condition of hypothyroidism obtained by feeding rats with thiouracil the concentration and the synthesis of ubiquinone in the liver showed a small decrease. 4. Synthesis of ubiquinone in liver slices was partially inhibited by addition of thyroxine in vitro. Therefore the activation effect on ubiquinone synthesis of excess of thyroxine in the intact animals appears to be by an indirect mechanism.
AuthorsA R Inamdar, T Ramasarma
JournalThe Biochemical journal (Biochem J) Vol. 111 Issue 4 Pg. 479-86 (Feb 1969) ISSN: 0264-6021 [Print] ENGLAND
PMID5774472 (Publication Type: Journal Article)
Chemical References
  • Ubiquinone
  • Thyroxine
Topics
  • Animals
  • Depression, Chemical
  • Diet
  • Hyperthyroidism (metabolism)
  • Hypothyroidism (metabolism)
  • In Vitro Techniques
  • Liver (analysis, metabolism)
  • Mitochondria, Liver (analysis)
  • Rats
  • Stimulation, Chemical
  • Thyroid Diseases (chemically induced, metabolism)
  • Thyroxine (pharmacology)
  • Ubiquinone (analysis, biosynthesis, metabolism)

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