Effect of a mitochondria-targeted vitamin e derivative on mitochondrial alteration and systemic oxidative stress in mice

Gaowei Mao, George A. Kraus, Ikyon Kim, Michael E. Spurlock, Theodore B. Bailey, Donald C. Beitz

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The objective of the present study was to determine whether a mitochondria-targeted vitamin E derivative (MitoVit E) would affect certain mitochondrial parameters, as well as systemic oxidative stress. A total of sixty-four mice were fed a high-fat (HF) diet for 5 weeks. They were then switched to either a low-fat (LF) or a medium-fat (MF) diet, and administered orally with MitoVit E (40 mg MitoVit E/kg body weight) or drug vehicle (10 % (v/v) ethanol in 0•9 % (w/v) NaCl solution), every other day for 5 weeks. Mitochondrial ATP and H2O2 production rates in both the liver and the gastrocnemius were not affected by MitoVit E administration in either LF or MF diet-fed mice. However, the number and average size of the subsarcolemmal mitochondria, but not the intermyofibrillar mitochondria, from the soleus muscle were significantly higher in the MF group receiving MitoVit E (MF-E) than in the MF group receiving vehicle only (MF-C). After the mice were switched from the HF diet to the four dietary treatments (LF-C, LF-E, MF-C and MF-E), the decrease in urinary isoprostane concentration was significantly greater in the LF-E group than in the other three groups during the whole study (weeks 6-10). In addition, MitoVit E significantly increased plasma superoxide dismutase (SOD) activity in the MF diet-fed group without affecting plasma glutathione peroxidase activity or H2O2 levels. Overall, these data suggest that MitoVit E affects subsarcolemmal mitochondrial density and systemic oxidative stress parameters such as plasma SOD activity and urinary isoprostane concentration.

Original languageEnglish
Pages (from-to)87-95
Number of pages9
JournalBritish Journal of Nutrition
Volume106
Issue number1
DOIs
Publication statusPublished - 2011 Jul 14

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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