Showing 29 results for Oxidative Stress
Mohabbat Jamhiri, Zeinab Hafizibarjin, Mojtaba Ghobadi, Ali Moradi, Fatemeh Safari,
Volume 20, Issue 4 (7-2017)
Abstract
Abstract
Background: Oxidative stress plays an important role in the pathogenesis of hypertension- induced cardiac hypertrophy. Plants are a rich source of antioxidant compounds. Thymol is a natural monoterpen phenol which is plentiful in some plants and shows many biological effects. The aim of the present study was to assess the effects of thymol on activity of antioxidant enzyme catalase, malondialdehyde (MDA) level and the activity of the inhibition of free radical DPPH (2,2-Diphenyl-1-picryl-hydrazyl), following left ventricular hypertrophy in rats.
Materials and Methods: In this experimental study, rats were divided into hypertrophied group without any treatment (H group) and rats pretreated with 25 and 50 mg/kg/day of thymol (Thy25+H and Thy50+H groups, respectively). Intact animals were served as control (Ctl). Animal model of left ventricular hypertrophy was induced by abdominal aortic banding. Serum catalase (CAT) activity, malondialdehyde (MDA) level and the activity of inhibition of free radicals DPPH were determined by the biochemical methods.
Results: In Thy25+H and Thy50+H groups, the CAT activity was increased significantly in serum (p<0.01, vs. Ctl). Also, serum level of MDA was decreased significantly compared to the group H in Thy25+H and Thy50+H groups (p<0.05 and p<0.001, respectively). The effect of inhibiting DPPH free radicals was increased significantly in Thy25+H and Thy50+H groups compared to the group H (p<0.001 and p<0.05, respectively).
Conclusion: The findings of this study suggest that thymol as an antioxidant causes cardioprotective effects and as well as prevents left ventricular hypertrophy via augmentation of serum antioxidant capacity.
Ali Asghar Ghafarizadeh, Gholamhassan Vaezi, Seyed Mohammad Ali Shariatzadeh, Ali Akbar Malekirad,
Volume 20, Issue 6 (9-2017)
Abstract
Abstract
Background: In Asthenoteratozoospermic men, low motility, defected DNA and highly oxidative stress in sperm cause poor assisted reproductive techniques (ART) outcomes. The aim of this study was to determine the effect of Vitamin E (Vit E), as a potent antioxidant, on sperm motility, viability and DNA integrity at different times of in vitro incubation (after 2, 4 and 6-h) to improve asthenoteratozoospermic semen samples for ART.
Materials and Methods: Asthenoteratozoospermic semen samples of 50 volunteers were collected and examined. Each sample was divided into two groups of control and vitamin E (2mM) and kept in the 37 °C and 6 % CO2 for 2, 4 and 6 hours. After this incubation, sperm motility, viability and sperm DNA fragmentation (SCD) were evaluated in each group. Data were analyzed using repeated measurement of ANOVA and T-test. The means were considered significantly different at p<0.05.
Results:Significant decrease in total and progressive motility and viability as well as significant increase in sperm DNA damage (after 6h of incubation) were found in control group vs. the control group before incubation (p<0.05). The sperm motility and viability was significantly higher in vitamin E group compared to untreated control group (p<0.05). Our results also showed that DNA fragmentation significantly was lower after 6h of vitamin E treatment (p<0.05).
Conclusion: In vitro supplementation of vitamin E in asthenoteratozoospermia semen samples may protect spermatozoa from maltreatment effect of ROS during sperm sampling via keeping enzymatic and antioxidant process in optimum condition.
Hojat Anbara, Hassan Morovvati, Masoud Adib Moradi, Rasoul Shahrooz,
Volume 20, Issue 7 (10-2017)
Abstract
Abstract
Background: Phenylhydrazine (PHZ) as a strong oxidant agent causes variety of toxic effects including alterations in the biochemical and cardiac tissue. The aim of the present study was to investigate the effects of royal jelly (RJ) and vitamin C (vit C) against PHZ-induced cardiotoxicity in mice.
Materials and Methods: Adult male mice were randomly assigned to eight groups of eight mice each. PHZ was administered to four groups of mice at a dose of 60 mg/kg per 48 hours intraperitoneally for 35 days. Three of these groups received vit C (250 mg/kg per day) intraperitoneally, RJ (100 mg/kg per day) orally and vit C+RJ with same doses four hours before PHZ administration, respectively. A vehicle-treated control group and vit C, RJ and vit C+RJ control groups were also included.
Results: RJ and vit C significantly decreased (p< 0.05) the serum level of malondialdehyde and creatine kinase (CK-BM) that had been increased by PHZ. Also, RJ and vit C increased the total antioxidant capacity and supraxoid dismutase serum that had been decreased by induced PHZ. Moreover, RJ and vit C could improve the tissue damages induced by PHZ such as diffused edema, hemorrhage, congestion, hyaline exudates, necrosis and also fibrosis tissue in heart tissue.
Conclusion: It seems that Vit C and RJ can minimize PHZ-induced cardiotoxicity in mouse through oxidative reactions inhibition.
Mehran Dorostghoal, Seyyed Mansour Seyyednejad, Ayoob Jabari,
Volume 21, Issue 3 (6-2018)
Abstract
Background and Aim: Recently, there is increasing concern about the declining of male reproductive health. Oxidative stress has been proposed as a possible mechanism contributed in reproductive system failure. Dorema aucheri that is being used in Persian folk medicine has been supposed to have male fertility-enhancing properties. Present study was done to evaluate the impacts of Dorema aucheri on oxidative status and reproductive parameters in male rats.
Materials and Methods: In this experimental study, healthy adult male Wistar rats were treated with 100, 200 and 400 mg/kg of ethanolic D. aucheri leaves extract via gavage for 70 days. Blood samples were collected for analysis of testosterone, LH and FSH serum levels. Reproductive organs weight, density, motility and morphology of spermatozoa, seminiferous tubules diameter, germinal epithelium height and also testicular levels of malondialdehyde (MDA), superoxide dismutase (SOD) and glutathione peroxidase (GPx) were evaluated.
Findings: Significant (p<0.05) increases were seen in the testis and epididymis weights of male rats treated with 200 and 400 mg/kg D. aucheri extract. In rats treated with D. aucheri extract sperm density and percent of morphologically normal sperm were significantly (p<0.05) higher. No significant differences were seen in serum testosterone, FSH and LH levels between D. aucheri extract-treated groups and controls. D. aucheri significantly (p<0.05) reduced malondialdehyde (MDA) levels and also increased superoxide dismutase (SOD) and glutathione peroxidase (GPx) activity in testicular tissue of rats.
Conclusion: Present study indicates that D. aucheri leaves extract has beneficial effects on reproductive parameters in male rats which might be a consequence of its antioxidant properties. |
Amin Mombeyni, Mehdi Bahmanzade, Abbas Sarami, Saeed Changizi-Ashtiyani, Mohammad Parastesh,
Volume 21, Issue 4 (8-2018)
Abstract
Background and Aim: Following physical activity in various tissues of the body, oxidative stress occurs and affects the antioxidant capacity and consequently the fertility of men negatively. The aim of this study was to investigate the effects of resistance training on oxidative stress and spermatogenesis quality.
Materials and Methods: 20 male rats of Sprague Dawley (weight 200-250, 4 months old) were randomly divided into two groups of resistance training and control group (n = 10). The exercise program included climbing a ladder by hanging the load to the tail for 8 weeks (5 days a week, 3 times 4 repetitions). During the program, the load gradually was increased, and in the last week, it reached to 200% of the animal body weight. After intervention, the mice were anesthetized in separate groups and testicular tissue was isolated to evaluate Malondialdehyde index as an oxidative stress marker and to determine antioxidant capacity by Frap method. Fixation, processing, cutting of testicular tissue and eventually coloring steps were examined by Hematoxylin and Eosin (H & E). The spermatogenesisqualitywas calculated based on Johnson method. The data were analyzed by independent t-test was used and significance level was considered p <0.05.
Findings: Increased Malondialdehyde levels were observed in the treatment group compared to control group (p =0.01). In the training group, the spermatogenesis quality was lower (p =0.013), the antioxidant capacity in the training group was significantly higher than the control group (p=0.83) and there isn’t any significant difference.
Conclusion: The findings indicate thatdue to increased oxidative stress, increasing resistance training may have negative effects on the quality of spermatogenesis and men's fertility. |
Mehri Jamilian, Nazanin Ravanbakhsh,
Volume 21, Issue 5 (10-2018)
Abstract
Background and Aim: We are aware of no study that examined the effects of vitamin E plus omega-3 fatty acid supplementation on inflammatory and oxidative stress biomarkers in pregnant women with gestational diabetes (GDM). This study aimed to evaluate the effects of vitamin E plus omega-3 supplementation on insulin metabolism and inflammatory and oxidative stress biomarkers in pregnant women with gestational diabetes.
Materials and Methods: This randomized, double-blind, placebo-controlled clinical trial was performed on 60 women with GDM. Subjects were randomly assigned to receive either 400 IU vitamin E plus 1000 mg omega-3 fatty acid supplements (n=30) or placebo (n=30) for 6 weeks. Fasting blood samples were taken at study baseline and after 6 weeks of intervention to quantify biochemical variables.
Findings: Vitamin E plus omega-3 fatty acid supplementation led to a significant rise in plasma total antioxidant capacity (+187.5±224.9 vs. -32.5±136.1 mmol/L, p<0.001) and a significant decrease in MDA levels (-0.1±0.9 vs. +0.6±1.4 µmol/L, p=0.04) compared with placebo. Furthermore, a significant increase in plasma NO levels (+5.0±7.7 vs. -12.0±28.0 µmol/L, p=0.002) was seen after vitamin E plus omega-3 fatty acid supplementation compared with the placebo.
Conclusion: Vitamin E plus omega-3 fatty acid supplementation in GDM women had beneficial effects on biomarkers of inflammation and oxidative stress.
Fatemeh Samimi, Maryam Baazm, Ebrahim Eftekhar, Farideh Jalali Mashayekh,
Volume 22, Issue 4 (9-2019)
Abstract
Background and Aim Oxidative stress is the main factor in the development and progression of diabetes and its related complications. There is growing evidence that antioxidants supplementation can improve oxidative stress induced in diabetes. The present investigation was conducted to study the effects of Coenzyme Q10 (CoQ10) on the Oxidative Stress Index (OSI) in diabetic rats.
Methods and Materials A total of 30 male rats were divided into five groups: saline, sesame oil (as a vehicle), CoQ10-treated (10 mg/kg/day), diabetic (induced with streptozotocin: 55 mg/kg), and CoQ10-treated diabetic (10 mg/kg/d). Then, we measured the Malondialdehyde (MDA), Total Oxidant Status (TOS), and Total Antioxidant Capacity (TAC) levels in the rats’ liver homogenate. Additionally, the OSI was calculated.
Ethical Considerations The Research Ethics Committee of Arak University of Medical Sciences approved this study (Code: IR.ARAKMU.REC.1397.119).
Results results showed a significant decrease in the level of liver MDA (P=0.022), TOS (P=0.03), and OSI (P=0.028) in the CoQ10-treated diabetic group compared to the diabetic rats. No significant change was observed in the total thiol group (P=0.25) and TAC (P=0.77) level in diabetic rats’ livers treated with CoQ10 compared to diabetic rats.
Sahar Dehghani, Leila Rouhi, Noosha Ziya Jahromi, Reza Dehghani, Khalil Khashei Varnamkhasti,
Volume 24, Issue 2 (5-2021)
Abstract
Background and Aim: Proliferate potential differentiate into different cell lineages and high self-renewal of Mesenchymal Stem Cells (MSCs); thus, they are ideal tools for regenerative medicine. However, a leading problem is an oxidative stress in the target tissue and the apoptosis of transplanted stem cells before tissue repair. The pretreatment of stem cells with antioxidants may make them resistant to oxidative stress. Ginger is the main medicinal plant with antioxidant properties. This study explored the antioxidant effects of ginger extract on bioavailability and oxidative stress-induced apoptosis in human adipose tissue-derived mesenchymal stem cells and rat bone marrow examined.
Methods & Materials: In this study, human adipose tissue-derived mesenchymal stem cells and rat bone marrow were cultured in a DMEM medium with 20% FBS. The explored cells were incubated for 4 and 6 hours for pretreatment with different concentrations of ginger extract (50, 100, 200, & 400 mg/mL); then, they were treated with 200 μM H2O2 for 2 hours. Bioavailability was analyzed by ELISA reader using an MTS kit and apoptosis was analyzed by flow cytometry using an Annexin V-FITC/PI kit into the manufacturer’s protocol at both times. The obtained data were analyzed by Analysis of Variance (ANOVA) using SPSS.
Ethical Considerations: This study was approved by the Ethics Research Committee of Shahrekord Branch, Islamic Azad University (Code: IR.IAU.SHK.REC.1397.028).
Results: The MTS results indicated a dose- and time-dependent manner increase in the bioavailability of human adipose tissue-derived mesenchymal treated stem cells. Ginger extract treatment also dose- and time-dependently decreased the rate of apoptosis in rat bone marrow mesenchymal stem cells.
Conclusion: Ginger extract, by reducing the oxidative stress in mesenchymal stem cells, elevates their lifespan in the target tissue, and increases the efficiency of these cells in tissue regeneration.
Fatemeh Samimi, Reza Azizi, Farideh Jalali Mashayekhi,
Volume 24, Issue 5 (11-2021)
Abstract
Coronavirus disease-19 (COVID-19) is a new member of the coronavirus family causing acute respiratory infection. Patients with COVID-19 have a higher risk of developing oxidative stress during this infection. Moreover, the virus induces ROS production that activates cellular pathways for viral replication.
Nuclear factor erythroid 2-related factor (Nrf2) is a crucial transcription factor in cellular antioxidant defense by mediating Virus-induced oxidative stress and ROS production. This article suggests that an Nrf2 activator may be beneficial in preventing oxidative stress development in COVID-19 patients. Coronaviruses are a significant group of viruses that cause different illnesses in humans and animals. These illnesses can range from the common cold to more severe diseases such as SARS (Severe acute respiratory syndrome), Middle East Respiratory Syndrome (MERS), and COVID-19. COVID-19 is a new viral disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
The main symptoms of COVID-19-infected patients are fever, dry cough, fatigue, and sometimes respiratory problems such as shortness of breath, sore throat, and infection [1].
