alexa Effects of isoeugenol on oxidative stress pathways in normal and streptozotocin-induced diabetic rats.
Pharmaceutical Sciences

Pharmaceutical Sciences

Pharmaceutica Analytica Acta

Author(s): Rauscher FM, Sanders RA, Watkins JB rd

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Abstract Because some complications of diabetes mellitus may result from oxidative damage, we investigated the effects of subacute treatment (10mg/kg/day, intraperitoneal [ip], for 14 days) with the antioxidant isoeugenol on the oxidant defense system in normal and 30-day streptozotocin-induced diabetic Sprague-Dawley rats. Liver, kidney, brain, and heart were assayed for degree of lipid peroxidation, reduced and oxidized glutathione content, and activities of the free radical-detoxifying enzymes catalase, superoxide dismutase, glutathione peroxidase, and glutathione reductase. All tissues from diabetic animals exhibited disturbances in antioxidant defense when compared with normal controls. Treatment with isoeugenol reversed diabetic effects on hepatic glutathione peroxidase activity and on oxidized glutathione concentration in brain. Treatment with the lipophilic compound isoeugenol also decreased lipid peroxidation in both liver and heart of normal animals and decreased hepatic oxidized glutathione content in both normal and diabetic rats. Some effects of isoeugenol treatment, such as decreased activity of hepatic superoxide dismutase and glutathione reductase in diabetic rats, were unrelated to the oxidative effects of diabetes. In heart of diabetic animals, isoeugenol treatment resulted in an exacerbation of already elevated activities of catalase. These results indicate that isoeugenol therapy may not reverse diabetic oxidative stress in an overall sense. Copyright 2001 John Wiley & Sons, Inc. J Biochem Mol Toxicol 15:159-164, 2001
This article was published in J Biochem Mol Toxicol and referenced in Pharmaceutica Analytica Acta

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