Effects of Vitamin E Supplementation on Oxidative Stress in Streptozotocin Induced Diabetic Rats: Investigation of Liver and Plasma
Open accessAbstract
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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Vitamin E decreases hepatic peroxide level in diabetic rats.
“Vitamin E has been shown to decrease the hepatic peroxide level in diabetic rats.”
From Reactive Oxygen Species, Toxicity, Oxidative Stress, and Antioxidants: Chronic Diseases and Aging (2023) · cites this paper as Seven et al. 2004
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Can ursolic acid be beneficial against diabetes in rats?
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“Seven et al. [25] demonstrated that SOD and GSH-Px enzyme activities and GSH levels were decreased in the livers of STZ-induced diabetic rats compared to their controls.”
BackgroundOyelade, W. A., Ademola, O. J., & FAJILADE, O. T. (2021) · World Journal of Advanced Research and Reviews · doi:10.30574/wjarr.2021.11.2.0068 · Cited by 4 · see citing works
“(Seven et al., 2004).”
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Hepatoprotective potential of Ocimum gratissimum on ethanol induced hepatotoxicity in albino rats
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The Beneficial Effects of Actinomycetales Immune Modulators in the Pancreas of Diabetic Rats
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Effects of Nano-Fipronil on Male Rats’ Biochemical, Liver, and Renal Functions
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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
- gold
- doi.org
- 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
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
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