Effects of coenzyme Q10 treatment on antioxidant pathways in normal and streptozotocin-induced diabetic rats

Frederick M. Rauscher, Ruth A. Sanders, John B. Watkins

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

Coenzyme Q10 is an endogenous lipid soluble antioxidant. Because oxidant stress may exacerbate some complications of diabetes mellitus, this study investigated the effects of subacute treatment with exogenous coenzyme Q10 (10 mg/kg/day, i.p. for 14 days) on tissue antioxidant defenses in 30-day streptozotocin-induced diabetic Sprague-Dawley rats. Liver, kidney, brain, and heart were assayed for degree of lipid peroxidation, reduced and oxidized glutathione contents, and activities of catalase, superoxide dismutase, glutathione peroxidase, and glutathione reductase. All tissues from diabetic animals exhibited increased oxidative stress and disturbances in antioxidant defense when compared with normal controls. Treatment with the lipophilic compound coenzyme Q10 reversed diabetic effects on hepatic glutathione peroxidase activity, on renal superoxide dismutase activity, on cardiac lipid peroxidation, and on oxidized glutathione concentration in brain. However, treatment with coenzyme Q10 also exacerbated the increase in cardiac catalase activity, which was already elevated by diabetes, further decreased hepatic glutathione reductase activity, augmented the increase in hepatic lipid peroxidation, and further increased glutathione peroxidase activity in the heart and brain of diabetic animals. Subacute dosing with coenzyme Q10 ameliorated some of the diabetes-induced changes in oxidative stress. However, exacerbation of several diabetes-related effects was also observed.

Original languageEnglish
Pages (from-to)41-46
Number of pages6
JournalJournal of Biochemical and Molecular Toxicology
Volume15
Issue number1
DOIs
StatePublished - 2001

Fingerprint

coenzyme Q10
Streptozocin
Rats
Medical problems
Antioxidants
Glutathione Peroxidase
Lipid Peroxidation
Lipids
Brain
Oxidative stress
Glutathione Disulfide
Glutathione Reductase
Liver
Catalase
Superoxide Dismutase
Animals
Oxidative Stress
Tissue
Kidney
Diabetes Complications

Keywords

  • Brain
  • Coenzyme Q
  • Diabetes
  • Heart
  • Kidney
  • Liver
  • Oxidative stress
  • Reactive oxygen species
  • Ubiquinone

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry
  • Toxicology
  • Health, Toxicology and Mutagenesis

Cite this

Effects of coenzyme Q10 treatment on antioxidant pathways in normal and streptozotocin-induced diabetic rats. / Rauscher, Frederick M.; Sanders, Ruth A.; Watkins, John B.

In: Journal of Biochemical and Molecular Toxicology, Vol. 15, No. 1, 2001, p. 41-46.

Research output: Contribution to journalArticle

Rauscher, Frederick M. ; Sanders, Ruth A. ; Watkins, John B. / Effects of coenzyme Q10 treatment on antioxidant pathways in normal and streptozotocin-induced diabetic rats. In: Journal of Biochemical and Molecular Toxicology. 2001 ; Vol. 15, No. 1. pp. 41-46.
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