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Showing 6 results for Antioxidant Enzymes

Volume 6, Issue 2 (6-2006)

  Background & Objectives: Diabetes mellitus may be associated with the imbalance between protective effect of antioxidants and increased free radical production with regard to discrepancies of the findings in previous researches the present study set out to determine the changes of plasma malondialdehyde and erythrocyte antioxidant superoxide dismutase activity in patients with type II diabetes mellitus.

  Methods: This case-control study was conducted in 2005 using random sampling. 38 patients with type II diabetes mellitus who referred to 5th Azar diabetes center and 19 age and sex matched healthy controls were selected for this study. Heparinated blood samples were taken from the cases. The separated plasma was tested for blood sugar, lipid peroxidation and blood cells (for glycolisated Hb and superoxide dismutase enzyme activity). The collected data were analyzed by SPSS (ver. 10) using t-test.

  Results: The level of plasma malondialdehyde from type II diabetes mellitus patients (6.27±0.80 nmol/ml) was significantly different from that in control group (3.56±0.98 nmol/ml)(p<0.05). Erythrocyte superoxide dismutase activity from type II diabetes mellitus patients (678.78±59.36 U/gr Hb) was significantly lower than control group (1056.47±52.98 U/gr Hb) (p<0.05).

  Conclusion: The significant difference between the increase in malondialdehyde and decrease in the activity of antioxidant enzymes in patients with type II diabetes mellitus may predispose to the development of serious complications leading to cellular damage. This suggest that diabetic patients may need more antioxidants than normal. Supplementation with medical or non-medical free radical scavengers such as vitamins E and C or foods untaining vitamin C (sitrus fruits) have a potential role in reinforcing antioxidant defence and can be important in diabetic patients.

Reza Mahdavi , Ali Nemati , Eiraj Feizi, Mojtaba Amani , Hosein Alimohammadi Asl, Mohammad Mazani M, Phd4; Nagizadeh Bagi , Abbas , Ali Shadman , Reza Alipanah Mogadam, Asghar Pirzadeh, Mousa Ghayour Nahand,
Volume 11, Issue 2 (6-2011)

  Background & Objectives: Consumption of ω3 fatty acids supplementation inhibits oxidative stress injury, increases activity of antioxidant enzymes and decreases lipid peroxidation in gastric cancer patients. In this study, we examined effects of ω-3 fatty acid intakes on oxidative stress in gastric cancer patients undergoing chemotherapy.

  Methods: This double blind clinical trial study was conducted on 30 adult patients (15 cases and 15 controls) with gastric cancer during chemotherapy in Ardabil city in 2010. Case and control groups were selected by randomized allocation. Three grams ω -3 fatty acid supplementation (1.8 g EPA & 1.2 g DHA in 10 g fish oil) and placebo were given case and control groups for 45 days, respectively. Anthropometric indices (weight, height & BMI) were measured. Blood samples were taken and then biochemical factors including triglycerides, total cholesterol, HDL and LDL cholesterol, MDA, and total antioxidants were evaluated at the beginning, middle and end of the study . The data were analyzed by using Paired sample t-test, Independent sample t-test and repeated measures test.

  Results: MDA, Weight and BMI of omega group after intervention were significantly more than control group at the end of the study (p<0.05). Weight and BMI were decreased but serum MDA was significantly increased in control group during the study (p<0.05). Weight, BMI , and total antioxidants were significantly increased in omega group during day 30-45, (p<0.05). There were no significant differences in other biochemical factors at the end of study.

  Conclusion: The present investigation shows administration of ω3 fatty acid supplements to gastric cancer patients during chemotherapy increases the total antioxidants capacity and prevents the enhancement of oxidative stress.

Reza Alipanahmogadam , Mohammad Mazani , Abbas Naghizadeh Baghi, Ali Nemati, Mojtaba Amani , Bahman Bashardoost, Amir Mansour Vatankhah , Shahab Bohlooli,
Volume 11, Issue 3 (9-2011)

  Background & Objectives: Several evidences show that oxidative stress is high among patients with hemodialysis . This study was aimed to investigate the oxidative stress and serum level of zinc and copper in patients with non-diabetic hemodialysis .

  Methods: In a case-control study, 60 patients with non-diabetic hemdialysis referred to hemodialysis section, Ardabil Bou-Ali hospital, and 60 healthy individuals, matched by age and sex, were selected. In each group, lipid profile, blood glucose, creatinine, urea, total protein, albumin, zinc, copper, malondialdehyde, total antioxidant capacity, activity of glutathione peroxidase and superoxide dismutase were measured. The results were analyzed statistically by using Pearson correlation coefficient and Student-t test.

  Results: The amount of zinc, blood sugar, cholesterol, triglyceride, total protein, albumin, high density lipoprotein-C and low density lipoprotein-C were significantly lower in patients with hemodialysis in comparison with those in normal individuals. T he activity of superoxide dismutase, glutathione peroxidase in red blood cells and serum total antioxidant capacity were significantly high in patients in comparison with those in control group. However, serum concentrations of copper and malondialdehyde in two groups were not statistically different.

  Conclusion : The results of this study show that increase of antioxidant enzymes activity reduces the oxidative stress status in patients with non-diabetic hemodialysis . Zinc deficiency was also observed in these patients.

Sara Rahbar, Naser Ahmadiasl,
Volume 12, Issue 3 (9-2012)

  Background & Objectives: Numerous studies have been conducted to assess the effects of acute resistance exercises on the structure and the function of heart, but little works done on effects of chronic resistance exercises. So, the objective of current study was to investigate the long term effect of regular exercises on cardiac function and oxidative stress.

  Methods: Forty male Wistar rats in the weight range of 250- 300 g were used in this study. They were divided in 2 following groups: The 3 months exercises test group and control group which remained without exercises. Regular resistive exercise was carried out according to the model proposed by Tamaki et al. Test group rats exercised for three months. Finally the hearts of 10 rats in each group were taken for homogenization, oxidative stress measurement and the other ten were examined for heart function. Malondialdhyde as an index of oxidative stress and superoxide dismutase, glutathione peroxides and catalase as an indicator of antioxidant capacity with special kits were specifically measured.

  Results: Regular resistive exercise didn't significantly affect the rats' weight, but heart weight in exercise group showed a significant increase (p<0.05). There was a significant decrease in heart rate in exercise group (p<0.05). Left ventricle contraction strength and coronary flow had a significant increase in exercise group in comparison with control group (p<0.05). There was not any significant difference in Malondialdhyde and antioxidant enzymes activity.

  Conclusion: This study showed that, heart efficiency had a significant improvement under effect of regular resistive exercise. Meanwhile, regular resistive exercise didn’t have any significant effect on oxidative stress and heart antioxidant defense capacity.

Mohammad Reza Nasirzadeh , Mohammad Heykalabadi , Alireza Nourazar ,
Volume 14, Issue 2 (6-2014)

  Background & Objectives: Diabetes is a chronic disease characterized by derangement in protein, fat and carbohydrate metabolism. Most of hypoglycemic agent used in medicine for diabetes treatment are reported to have side effects for long run. On the other hand, increase in oxidative stress is effective in the genesis of diabetes. Therefore, the purpose of this study was to assess the effect of alcoholic extract of Euphorbia cyparissias on serum glucose and antioxidant enzymes level in diabetic male rats.

  Methods : In this study, 40 adult male Wistar rats weighting 250±20 grams divided into four groups randomly: control, diabetic animals, treatment 1 and treatment 2 which received 500 and 250 mg/kg of E.cyparissias extract for 21 days by gastric gavage, respectively. At the end of the treatment, level of antioxidant enzymes including TAC, MDA, SOD and GPX and also blood glucose were determined in animal's serum.

  Results : The blood glucose levels were significantly lowered in the group of treatment 1 compared to diabetic group (p<0.05). Results showed that MDA level of serum was increased significantly in diabetic group in comparison with control group (p<0.05). Furthermore, the TAC, SOD and GPX level were increased significantly in the group of treatment 1 compared to diabetic group (p<0.05).

  Conclusion : This study showed that oral administration of E.cyparissias extract has antidiabetic and antioxidant activity in streptozotocin induced diabetic rats.

Taktam Sadat Vafa , Mojdeh Emadi , Seyed Damoon Sadoughi,
Volume 18, Issue 1 (3-2018)

Background & objectives: Curcumin has antioxidant properties. The aim of this study was to determine the effect of curcumin on bax, bcl-2, antioxidant enzymes and lipid peroxidation of sperm after freezing procedure.
Methods: In this experimental study, semen samples were collected from four mature Holstein bulls, twice a week in eight innings. Semen samples were divided into four groups. Zero (control), 10 (Experimental group one), 20 (Experimental group two) and 30 (Experimental group three) mg/ml of curcumin with diluents were added to the semen samples. After thawing, Bax, Bcl-2 and malondialdehyde levels as well as superoxide dismutase, glutathione peroxidase and catalase enzymes were measured in sperm samples using ELISA.
Results: According to the results, Bcl-2, superoxide dismutase, glutathione peroxidase and catalase levels  in sperm samples treated with 20 and 30 mg/ml curcumin significantly increased and Bax and malondialdehyde levels significantly decreased compared to control groups (p<0.05). This difference was not significant for sperm samples treated with 10 mg/ml curcumin.
Conclusion: Dose-dependent administration of curcumin decreased oxidative stress and lipid peroxidation and increased anti-apoptosis proteins in freeze-thawing sperms.

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مجله دانشگاه علوم پزشکی اردبیل Journal of Ardabil University of Medical Sciences
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