Cited by 109Antioxidant Activity and Oxidative StressNatural Antidiabetic Agents StudiesExercise and Physiological Responses

Effects of Vitamin E Supplementation on Oxidative Stress in Streptozotocin Induced Diabetic Rats: Investigation of Liver and Plasma

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Seven, Arzu, Güzel, Sava, Seymen, Oktay, Civelek, Sabiha, Bolayırlı, Murat, Uncu, Murat, Burçak, Gülden·2004·Yonsei Medical Journal

Abstract

This experimental study was designed to investigate the effects of vitamin E supplementation, especially on lipid peroxidation and antioxidant status elements 3/4 namely, glutathione (GSH), CuZn superoxide dismutase (CuZn SOD), and glutathione peroxidase (GSH Px), both in blood and liver tissues of streptozotocin (STZ) diabetic rats. The extent to which blood can be used to reflect the oxidative stress of the liver is also investigated. In diabetic rats, plasma lipid peroxide values were not significantly different,from control,whereas erythrocyte CuZn SOD (p < 0.01), GSH Px (p < 0.001) activities and plasma vitamin E levels (p < 0.001), were significantly more elevated than controls. Vitamin E supplementation caused significant decreases of erythrocyte GSH level (p < 0.01) in control rats and of erythrocyte GSH Px activity (p < 0.05) in diabetic rats. Liver findings revealed significantly higher lipid peroxide (p < 0.001) and vitamin E (p < 0.01) levels and lower GSH (p < 0.001), CuZn SOD (p < 0.001) and GSH Px (p < 0.01) levels in diabetic rats. A decreased hepatic lipid peroxide level (p < 0.01) and increased vitamin E/lipid peroxide ratio (p < 0.001) were observed in vitamin E supplemented, diabetic rats. A vitamin E supplementation level which did not cause any increase in the concentration of the vitamin in the liver or blood, was sufficient to lower lipid peroxidation in the liver. Vitamin E/lipid peroxide ratio is suggested as an appropriate index to evaluate the efficiency of vitamin E activity,independent of tissue lipid values. Further, the antioxidant components GSH, GSH Px and CuZn SOD and the relationships among them, were affected differently in the liver and blood by diabetes or vitamin E supplementation.

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Crossref · 10.3349/ymj.2004.45.4.703

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Authors
Seven, A., Güzel, S., Seymen, O., Civelek, S., Bolayırlı, M., Uncu, M., & Burçak, G.
Affiliations
Istanbul University-Cerrahpaşa (TR)
Venue
Yonsei Medical Journal
Published
2004
Volume
45
Issue
4
Pages
703
ISSN
0513-5796 (ISSN-L)
OpenAlex
W2000677749
Cited by
109
References
0
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 9 · 2022: 9 · 2021: 4 · 2020: 4 · 2019: 4 · 2018: 6 · 2017: 7 · 2016: 5 · 2015: 12 · 2014: 5 · 2013: 5 · 2012: 8
FWCI
2.14
Type
journal article
Language
en
Open access
Locations
  • Yonsei Medical Journal (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Natural Antidiabetic Agents Studies
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
Keywords
vitamin E supplementation, oxidative stress, streptozotocin-induced diabetes, lipid peroxidation, antioxidant status, glutathione, superoxide dismutase, glutathione peroxidase, erythrocytes, liver, plasma, diabetes mellitus
MeSH terms
Animals, Antioxidants, Diabetes Mellitus, Experimental, Glutathione, Glutathione Peroxidase, Liver, Male, Superoxide Dismutase, Vitamin E, Lipid Peroxidation, Rats, Wistar, Oxidative Stress, Rats

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