An insight into the ameliorative effects of melatonin against chromium induced oxidative stress and DNA damage: a review

2021 ◽  
Vol 4 (3) ◽  
pp. 377-407
Author(s):  
Priyanka Ghosh ◽  
Tiyasa Dey ◽  
Aindrila Chattopadhyay ◽  
Debasish Bandyopadhyay
Keyword(s):  
Oxidative Stress ◽  
Dna Damage ◽  
Dna Adducts ◽  
Major Product ◽  
Radical Scavenger ◽  
Biological Macromolecules ◽  
Enzymatic Antioxidants ◽  
Dna Strands ◽  
Potential Benefits ◽  
Stable Forms

Chromium (Cr), a ubiquitous metal, has become a potent pollutant due to global industrialization, leading to pollution of air, water, and food that impacts human health. The most stable forms of Cr are Cr(III) and Cr(VI) (the major product of industrial activities). Cr(III) is a micronutrient essential for maintaining normal blood glucose and lipid profiles in our body but it can also form Cr (III)-DNA adducts. In addition, it directly produces reactive oxygen species (ROS) via Fenton and Haber-Weiss reactions; leading to tissue injuries. Cr (VI) has the capacity to generate Cr(V), Cr (IV), and Cr(III), respectively under suitable conditions. These intermediates also damage to biological macromolecules by interactions with several enzymatic and non-enzymatic antioxidants. For example, Cr(III) can make double DNA strands breaking to inhibit DNA replication, induce DNA oxidation, and DNA adducts formation. All of these lead to the development of malignancy. Melatonin, a potent radical scavenger as well as a metal chelator, effectively chelates Cr(VI) and prevents DNA oxidative damage. Melatonin can upregulate the gene expression of several antioxidant enzymes, and thereby, maintains cellular integrity from the oxidative stress. Thus, melatonin can be a prime molecule to protect against Cr(VI) induced cytotoxicity and genotoxicity. This review aims to highlight the potential benefits of melatonin on Cr(VI) induced oxidative stress and DNA damage.

scholarly journals POTENTIAL ROLE OF HAEMATOCOCCUS PLUVIALIS AGAINST DIABETES INDUCED OXIDATIVE STRESS AND INFLAMMATION IN RATS

2016 ◽  
Vol 10 (1) ◽  
pp. 245
Author(s):  
Farouk Kamel Elbaz ◽  
Hanan F Aly ◽  
Wagdy Kb Khalil ◽  
Gamila H Al ◽  
Naglaa A Hafiz ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Antioxidant Enzyme ◽  
Inflammatory Cytokines ◽  
Dna Adducts ◽  
Haematococcus Pluvialis ◽  
Lipid Peroxide ◽  
Ros Generation ◽  
Enzymatic Antioxidants ◽  
The Impact

ABSTRACTObjective: The aim of this study is to investigate the impact of Haematococcus pluvialis extract against oxidative stress and inflammatory cytokinesinduced by hyperglycemia in diabetic rats.Methods: Oxidative stress; lipid peroxide (as presented by Malondialdehyde; MDA) and nitric oxide (NO), beside total antioxidant capacity, enzymaticand non-enzymatic antioxidants including reduced glutathione, glutathione peroxidase, and glutathione reductase were evaluated. The inflammatorycytokines; tumor necrosis factor-alpha and interleukin-1 beta were also investigated in rats’ serum. Several analyses including expression ofantioxidant enzyme related genes, reactive oxygen species (ROS) formation and DNA adducts were performed.Results: The results showed that diabetes mellitus induced-rats exhibited increase in oxidative stress biomarkers and inflammatory cytokines, lowerexpression levels of the antioxidant enzyme genes; superoxide dismutase and glutathione S-transferase than those in control rats. In addition, diabeticrats exhibited significantly higher levels of ROS generation and 8-hydroxy-2’-deoxyguanosine (8-OHdG) formation. In contrary, supplementation ofdiabetic rats with H. pluvialis extract improved the negative effect of the hyperglycemia on antioxidant enzymes, the gene expression of antioxidantenzymes, and ROS generation as well as 8-OHdG formation.Conclusion: H. pluvialis extract decreased the oxidative stress, enhanced antioxidant status and inflammatory cytokines induced by hyperglycemiain diabetic rats. The effect of H. pluvialis extract involved in the increase of expression levels of antioxidant enzyme genes; decreased the levels of ROSgeneration and 8-OHdG formation which may be attributed to the presence of astaxanthin in H. pluvialis extract.Keywords: Haematococcus pluvialis, Hyperglycemia, Diabetes mellitus, Oxidative stress, Inflammatory cytokines, DNA adducts.

scholarly journals Auricularia Polytricha (Mushroom) Regulates Testicular DNA Expression and Oxidative Stress Markers of Streptozotocin-Induced Diabetic Male Wistar Rat

2020 ◽  
Vol 5 (3) ◽  
pp. 7-15
Author(s):  
Agbor Cyril Abang ◽  
Anyanwu G. E
Keyword(s):  
Oxidative Stress ◽  
Dna Damage ◽  
Normal Control ◽  
Diabetic Control ◽  
Normal Control Group ◽  
Control Group ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
Testicular Dysfunction ◽  
Dna Strands

Local Nigerian men have been using AuriculariaPolytricha as a treatment for sexual dysfunction without supporting evidence from scientific experiments. This study was to investigate the effect of ethanolic extract of A. Polytricha on testicular DNA expression and some oxidative stress markers using STZ-Induced diabetic rats as a model. The experiment included six groups, Group A (Normal Control, treated with normal saline), Group B (treated with 65mg/kg.bw of STZ), Groups C, D, and E (treated with 250mg/kg.bw, 500mg/kg.bw, 1000mg/kg.bw AP after inducing diabetics), and Group F (treated with 40mg/kg.bw metformin after inducing diabetics). The experiment lasted for 35 days. After termination of the experiment, Fuelgen nuclear reaction was used for DNA demonstration to assess testicular DNA distribution while serum Superoxide Dimutase (SOD), Catalase and Melondialdehyde where evaluated using reagent based antioxidant enzyme assay. Results reveals that SOD and Melondialdehyde activities were remarkably (p<0.05) higher in diabetic control animals when compared with the normal control group. Values in Groups C, D and F that were administered with 250, 500mg/kg.bw A. polytricha and metformin respectively were also significantly (p<0.05) increased when compared with the normal control group. However, diabetic animals placed on 1000mg/kg.bw A. polytrichadid not show any statistical significance in comparison with normal control group but was remarkably (p<0.01) decreased when compared to the diabetic group that received low dose A. polytricha, an indication that the reversal is dose dependent. Catalase concentration in diabetic control animals was remarkably (p<0.05) higher when compared to the normal control but was not significantly (p<0.05) different in groups D (DM+500mg/kg.bw A. polytricha) and E (DM+1000mg/kg.bw A. polytricha) when compared with the normal control group. Diabetic control animals showed reduced magenta colour intensity of DNA and increased clustering and cross linking of DNA strands when compared with the normal control. However the degree of cross link in DNA strands was reduced in the diabetic animals placed on 1000mg/kg.bw A. polytrichawhen compared with the diabetic control group. Reversal in DNA damage and values of serum oxidative stress markers following administration of graded doses of A. polytricha could be attributed to essential phytochemical and therapeutic constituents in A. polytricha like polyphenol and flavonoid which can be found useful in prevention and treatment of diabetes induced testicular dysfunction. In summary, AP can contribute to a reversal in DNA damage and levels of serum oxidative stress markers in treating diabetes-induced testicular dysfunction.

Impact of alcohol on hepatic mitochondrial DNA damage in streptozotocin diabetic rats

2017 ◽  
Vol 2 (2) ◽  
pp. 90 ◽  
Author(s):  
Swarnalatha Kodidela ◽  
Suresh Govatati ◽  
Sumanth Kumar Matha ◽  
Swapna Vahini Korla ◽  
B. Prathap Naidu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Dna Damage ◽  
Mitochondrial Dna ◽  
Diabetic Rats ◽  
Sequencing Analysis ◽  
Enzymatic Antioxidants ◽  
Mitochondrial Dna Damage ◽  
Mtdna Deletions ◽  
D Loop ◽  
The Impact

Mitochondrial dysfunction with increased production of reactive oxygen species (ROS) is a characteristic feature of diabetes which is associated with damage of mitochondrial DNA (mtDNA). Alcohol metabolism generates ROS with enhanced oxidative stress leading to damage of cellular constituents including mtDNA. The aim of the present study is to investigate the impact of alcohol consumption on hepatic mtDNA damage in diabetic rats. MtDNA was isolated from hepatic tissues of non-diabetic and streptozotocin induced diabetic rats after alcohol treatment. Comprehensive screening of mtDNA displacement loop (D-loop) was carried out by PCR-Sanger’s sequencing analysis. MtDNA deletions were analyzed by long-extension PCR. Furthermore, activities of enzymatic and non-enzymatic antioxidants were measured in hepatic tissue of all rats. Our results showed increased frequency of D-loop mutations in alcoholic-diabetic rats when compared to diabetic or alcoholic non-diabetic rats. DNA mfold analysis predicted higher free energy for 15507C, 15560T and 16116C alleles compared to their corresponding wild alleles which represents less stable secondary structures with negative impact on overall mtDNA function. MtDNA deletions were observed in all experimental groups except controls. Markedly decreased activities of antioxidant enzymes viz., GPx, SOD, catalase and GSH content was identified in alcoholic-diabetic rats when compared to remaining groups. In conclusion, decreased GSH content and lowered activity of catalase, SOD and GPx favor the environment for oxidative stress, which might lead to exacerbation of hepatic mitochondrial DNA damage in diabetic rats receiving alcohol.

Antioxidant defense responses to sleep loss and sleep recovery

2005 ◽  
Vol 288 (2) ◽  
pp. R374-R383 ◽  
Author(s):  
Carol A. Everson ◽  
Christa D. Laatsch ◽  
Neil Hogg
Keyword(s):  
Oxidative Stress ◽  
Sleep Deprivation ◽  
Cell Injury ◽  
Antioxidant Activities ◽  
Defense Responses ◽  
Free Radical Scavenger ◽  
Pentose Phosphate ◽  
Radical Scavenger ◽  
Enzymatic Antioxidants ◽  
Recovery Sleep

Sleep deprivation in humans is widely believed to impair health, and sleep is thought to have powerful restorative properties. The specific physical and biochemical factors and processes mediating these outcomes, however, are poorly elucidated. Sleep deprivation in the animal model produces a condition that eventually becomes highly lethal, lacks specific localization, and is reversible with sleep, implying mediation by a biochemical abnormality. Metabolic and immunological consequences of sleep deprivation point to a high potential for antioxidant imbalance. The objective, therefore, was to study glutathione content in the liver, heart, and lung, because glutathione is considered a major free radical scavenger that reflects the degree to which a tissue has been oxidatively challenged. We also investigated major enzymatic antioxidants, including catalase and glutathione peroxidase, as well as indexes of glutathione recycling. Catalase activity and glutathione content, which normally are tightly regulated, were both decreased in liver by 23–36% by 5 and 10 days of sleep deprivation. Such levels are associated with impaired health in other animal models of oxidative stress-associated disease. The decreases were accompanied by markers of generalized cell injury and absence of responses by the other enzymatic antioxidants under study. Enzymatic activities in the heart indicated an increased rate of oxidative pentose phosphate pathway activity during sleep deprivation. Recovery sleep normalized antioxidant content in liver and enhanced enzymatic antioxidant activities in both the liver and the heart. The present results link uncompensated oxidative stress to health effects induced by sleep deprivation and provide evidence that restoration of antioxidant balance is a property of recovery sleep.

scholarly journals Dietary Resveratrol Alleviates AFB1-Induced Ileum Damage in Ducks via the Nrf2 and NF-κB/NLRP3 Signaling Pathways and CYP1A1/2 Expressions

Agriculture ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 54
Author(s):  
Hao Yang ◽  
Yingjie Wang ◽  
Chunting Yu ◽  
Yihan Jiao ◽  
Ruoshi Zhang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Dna Damage ◽  
Signaling Pathways ◽  
Dna Adducts ◽  
Aflatoxin B1 ◽  
Mrna Level ◽  
Basal Diet ◽  
Protective Effects ◽  
Expression Of Genes ◽  
And Oxidative Stress

The aim of this study was to explore the mechanism underlying the protective effects of resveratrol against Aflatoxin B1-induced ileum injury in ducks. A corn–soybean meal-basal diet and two test diets (500 mg/kg resveratrol +0.2 mg Aflatoxin B1/kg, 0.2 mg AFB1/kg) were used in a 10-wk design trial (n = 15 ducks/group). These results showed that the toxicity of Aflatoxin B1 significantly reduced the antioxidant capacity of duck ileum and induced inflammation, oxidative stress, mitochondrial dysfunction and DNA damage in ducks. The expression of genes, including CYP1A2, CYP2A6, and CYP3A4, at the mRNA level was significantly upregulated (p < 0.05) by AFB1. The level of Nrf2 was suppressed (p < 0.05) and the mRNA and protein level of NF-κB was activated (p < 0.05) in the AFB1 group. However, supplementation with 500 mg/kg dietary resveratrol in Aflatoxin B1-induced ducks significantly ameliorated these alterations and decreased the mRNA expression of CYP1A1 and CYP1A2 (p < 0.05) and the production of AFB1-DNA adducts (p < 0.05). The results proved that resveratrol alleviated ileum injury induced by AFB1, decreased the production of AFB1-DNA adducts by downregulating the expression of CYP1A1 and CYP1A2, and reduced DNA damage and oxidative stress via the Nrf2/ Keap1 and NF-κB/NLRP3 signaling pathways.

scholarly journals Oxidative stress and DNA damage in agricultural workers after exposure to pesticides

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Caterina Ledda ◽  
Emanuele Cannizzaro ◽  
Diana Cinà ◽  
Vera Filetti ◽  
Ermanno Vitale ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Dna Damage ◽  
Defense Mechanisms ◽  
Pesticide Exposure ◽  
Thiobarbituric Acid ◽  
Epidemiological Studies ◽  
Antioxidant Defenses ◽  
Biological Macromolecules ◽  
Exposed Workers ◽  
Organic Farmers

Abstract Background Recent epidemiological studies on workers describe that exposure to pesticides can induce oxidative stress by increased production of free radicals that can accumulate in the cell and damage biological macromolecules, for example, RNA, DNA, DNA repair proteins and other proteins and/or modify antioxidant defense mechanisms, as well as detoxification and scavenger enzymes. This study aimed to assess oxidative stress and DNA damage among workers exposed to pesticides. Methods For this purpose, 52 pesticide exposed workers and 52 organic farmers were enrolled. They were assessed: the pesticide exposure, thiobarbituric acid reactive substances (TBARS), total glutathione (TG), oxidized glutathione levels (GSSG), and 8-oxo-7,8-dihydro-2′-deoxyguanosine (8-oxodG), levels. Results Correlation between pesticide exposure was positively associated with high TBARS and 8-oxodG levels (p <  0.001). A negative association was founded with TG and GSSG and pesticide exposure. Conclusions The present investigation results seem to indicate a mild augment in oxidative stress associated with pesticide exposure, followed by an adaptive response to increase the antioxidant defenses to prevent sustained oxidative adverse effects stress.

Serum of 8-OHdG as a potential biomarker of oxidative DNA damage in workers exposed to harmful working environments

2020 ◽  
pp. 783-783
Author(s):  
I. A. Umnyagina ◽  
L. A. Strakhova ◽  
T. V. Blinova
Keyword(s):  
Oxidative Stress ◽  
Dna Damage ◽  
Blood Serum ◽  
Oxidative Dna Damage ◽  
Working Environment ◽  
Working Environments ◽  
Potential Biomarker ◽  
High Level ◽  
Damage Marker

In the blood serum of 70% individuals exposed to harmful factors of the working environment, a high level of oxidative stress and the DNA damage marker 8-Hydroxy-2’-Deoxyguanosine (8-OHdG) were detected.

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