Effect of Endurance Exercise on Antioxidant Enzyme Activities and Lipid Peroxidation in the Heart of the Streptozotocin-Induced Diabetic Rats

Farhangi, N; Nazem, F; Zehsaz, F

Volume 24, Issue 10 (Jan 2017) JSSU 2017, 24(10): 798-809 | Back to browse issues page

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Farhangi N, Nazem F, Zehsaz F. Effect of Endurance Exercise on Antioxidant Enzyme Activities and Lipid Peroxidation in the Heart of the Streptozotocin-Induced Diabetic Rats. JSSU 2017; 24 (10) :798-809
URL: http://jssu.ssu.ac.ir/article-1-3795-en.html

Effect of Endurance Exercise on Antioxidant Enzyme Activities and Lipid Peroxidation in the Heart of the Streptozotocin-Induced Diabetic Rats

N Farhangi ^*

, F Nazem

, F Zehsaz

Abstract: (9974 Views)

Introduction: Oxidative stress can promote the development of complications of diabetes. Moderate exercise improves cardiac antioxidant status in diabetic animals. The current study aimed to investigate the effect of 8 week endurance exercise training on some heart antioxidant enzyme activities and lipid peroxidation of heart tissue in streptozotocin-induced diabetic rats.

Methods: To this end, 30 male Wistar rats were randomly divided into 3 groups: the healthy control group (C), diabetic control group (DC) and trained diabetic group (TD). Animals in TD group were exercised on a treadmill 4 days a week for 8 weeks. After 8 weeks, superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT) activities and malondialdehyde (MDA) levels were measured in heart tissues. The data were analyzed using one-way ANOVA (p<0.05).

Results: The CAT and GPx activities of the heart tissue in DC group were found to be significantly higher (p=0.000) in compared with C group, whereas SOD activity was not found significantly different among the experimental groups. Also, heart GPx activity in TD group was significantly lower (p=0.000) than that of DC group, while CAT activity was not affected by endurance training. After 8-week endurance exercise (TD group), the MDA levels of heart tissue were significantly higher (respectively p<0.017 and p=0.000) than C and DC groups.

Conclusion: The results of the present study have demonstrated that due to decreased GPx activities and MDA levels, endurance exercise may make the heart tissue more susceptible to oxidative stress.

Keywords: Oxidative Stress, Endurance Training, Antioxidant Enzymes, Lipid Peroxidation, Heart Tissue

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Type of Study: Original article | Subject: Exercise Physiology
Received: 2016/06/29 | Accepted: 2016/12/24 | Published: 2017/01/18

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