Journal
FEBS LETTERS
Volume 578, Issue 1-2, Pages 53-57Publisher
WILEY
DOI: 10.1016/j.febslet.2004.10.067
Keywords
coenzyme Q9; coenzyme Q10; redox state; high performance liquid chromatography-electrochemical; hypoxia; rat
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The properties of coenzymes Q (CoQ9 and CoQ10) are closely linked to their redox state (CoQox/total CoQ) x 100. In this work, CoQ redox state was biologically validated by high performance liquid chromatography-electrochemical measurement after modulation of mitochondrial electron flow of cultured cells by molecules increasing (rotenone, carbonyl cyanide chlorophenylhydrazone) or decreasing (antimycin) CoQ oxidation. The tissue specificity of CoQ redox state and content were investigated in control and hypoxic rats. In control rats, there was a strong negative linear regression between tissular CoQ redox state and CoQ content. Hypoxia increased CoQ9 redox state and decreased CoQ9 content in a negative linear relationship in the different tissues, except the heart and lung. This result demonstrates that, under conditions of mitochondrial impairment, CoQ redox control is tissue-specific. (C) 2004 Published by Elsevier B.V. on behalf of the Federation of European Biochemical Societies.
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