scholarly journals Evaluation of the antitumor and antioxidant effects of jatobá (Hymenaea courbaril) extracts / Avaliação do efeito antitumoral e antioxidante de extratos do jatobá (Hymenaea courbaril)

2021 ◽  
Vol 7 (12) ◽  
pp. 116001-116018
Author(s):  
Elisângela Miranda de Jesus Lisboa ◽  
Lucinéia Reuse Albiero ◽  
Nadila Melchiors ◽  
Wesley Sandro de Paula Borges ◽  
Valfran da Silva Lima ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Aqueous Extract ◽  
Reduced Glutathione ◽  
Tumor Development ◽  
Thiobarbituric Acid ◽  
Renal Tissue ◽  
Ehrlich Carcinoma ◽  
Thiobarbituric Acid Reactive Substances ◽  
Hymenaea Courbaril ◽  
Antioxidant Effects

Ethnobotanical surveys have revealed the use of jatobá for the treatment of several diseases. This study determined the effect of plant extracts on the development of Ehrlich carcinoma. Male Swiss mice (n=6) were subcutaneously inoculated with 106 tumor cells and intragastrically administered ethanol (2 mg·mL-1, 5 mg·mL-1, or 10 mg·mL-1) or aqueous extracts of jatobá seed or bark for 90 days. Tumor development did not significantly differ between the groups studied; however, animals treated with the aqueous extract of the seed (2.205 mg·mL-1) had a reduction in tumor size compared to those treated with the aqueous extract of the bark (1.7 mg·mL-1). The treatment was not found to influence the survival of the animals studied. A new group of animals (n=7), with or without the tumor, received the aqueous extract of jatobá seed for 7, 14, and 30 days to evaluate oxidative stress. The extract reduced the thiobarbituric acid reactive substances levels at 7 days in the liver and kidneys, and 14 days in brain and renal tissue. Protein carbonylation levels were also reduced at 7 days in the liver and brain tissue and 14 days in the liver. The reduced glutathione levels diminished in animals treated for 7 and 14 days. We conclude that treatment with the aqueous extract of the jatobá seed presents promising activity in the reduction of oxidative stress.

scholarly journals Spirulina maxima and its effect on antioxidant activity in fructose induced oxidative stress with histopathological observations

2015 ◽  
Vol 62 (2) ◽  
pp. 13-19
Author(s):  
Urmila Jarouliya ◽  
Anish Zacharia ◽  
Raj K. Keservani ◽  
Godavarthi B.K.S Prasad
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Activity ◽  
Superoxide Dismutase ◽  
Blood Glucose ◽  
Reduced Glutathione ◽  
Thiobarbituric Acid ◽  
Diabetic Rats ◽  
Therapeutic Effects ◽  
Thiobarbituric Acid Reactive Substances ◽  
Spirulina Maxima

Abstract Diabetes mellitus is a metabolic disorder characterised by hyperglycemia and oxidative stress. The aim of the present study is to explore the antioxidant effect of Spirulina maxima in rat model along with the histopathological observations. Diabetes was induced by feeding 10% fructose solution orally to Wistar rats (n = 6) for 30 days, analysed for plasma blood glucose and the markers of the oxidative stress [catalase (CAT), superoxide dismutase (SOD), reduced glutathione (GSH) and thiobarbituric acid reactive substances (TBARS)]. These biochemical studies were associated with histopathological examination of liver and kidney sections. The microalga Spirulina maxima being rich in proteins and other essential nutrients is widely used as a food supplement. S. maxima at a dose of 5 and 10% per kg and the metformin (500 mg/kg) as reference drug were given orally for 30 days to the diabetic rats. Diabetic rats showed significant (p < 0.001) elevations in plasma blood glucose, thiobarbituric acid-reactive substances and significant reduction in catalase, superoxide dismutase and reduced glutathione activity. Oral administration of 5 and 10% aqueous extract of S. maxima for 30 days restored not only of blood glucose levels but also markers of oxidative stress. Histopathological observations of tissues manifested that the S. maxima administration had the protective and therapeutic effects against fructose-induced abnormalities in diabetic rats. It is concluded that S. maxima is effective in reinstating the antioxidant activity in addition to its antidiabetic effect in type 2 diabetic rats.

scholarly journals Redox parameters in blood of thyroid cancer patients after the radioiodine ablation

2017 ◽  
Vol 32 (4) ◽  
pp. 358-365
Author(s):  
Vera Spasojevic-Tisma ◽  
Milovan Matovic ◽  
Olgica Mihaljevic ◽  
Snezana Zivancevic-Simonovic ◽  
Marija Jeremic ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Thyroid Cancer ◽  
Cancer Patients ◽  
Differentiated Thyroid Cancer ◽  
Radioactive Iodine ◽  
Reduced Glutathione ◽  
Thiobarbituric Acid ◽  
Oxygen Species ◽  
Thiobarbituric Acid Reactive Substances ◽  
Radioiodine Ablation

The radioactive iodine (131I) ablation is a well-accepted treatment modality for differentiated thyroid cancer patients. Unfortunately, the radiation induces the oxidative stress and damages cells and tissues, simultaneously activating the mechanisms of antioxidative defense. Since the mechanisms of those processes are not completely known, we wanted to examine the changes in the most important reactive oxygen species and antioxidative components, as well as their correlation and significance for lipid peroxidation. Our results showed that the level of thiobarbituric acid reactive substances was increased during the first 30 days after the radiotherapy. Among antioxidant components, superoxide dismutase was increased in the 3rd and 30th day; catalase in 7th and reduced glutathione in 3rd and 7th day after the radiotherapy. As regards the prooxidants, the reduction of hydrogen peroxide (H2O2) was recorded in 7th and 30th day, and superoxide anion radical (O?-) was unchanged after the exposure to 131I. These results indicate that differentiated thyroid cancer patients are under constant oxidative stress despite the observed increase in antioxidative and reduction in prooxidative parameters. The understanding of these early processes is important since their progress determines the latter effects of 131I therapy.

scholarly journals Effect of silymarin on sodium fluoride-induced toxicity and oxidative stress in rat cardiac tissues

2012 ◽  
Vol 84 (4) ◽  
pp. 1121-1126 ◽  
Author(s):  
Seyed M. Nabavi ◽  
Seyed F. Nabavi ◽  
Akbar H. Moghaddam ◽  
William N. Setzer ◽  
Morteza Mirzaei
Keyword(s):  
Oxidative Stress ◽  
Superoxide Dismutase ◽  
Sodium Fluoride ◽  
Biochemical Parameters ◽  
Reduced Glutathione ◽  
Thiobarbituric Acid ◽  
Glutathione Level ◽  
Thiobarbituric Acid Reactive Substances ◽  
Cardiac Tissues ◽  
And Oxidative Stress

This study aim to evaluate the protective effect of silymarin on sodium fluoride-induced oxidative stress in rat cardiac tissues. Animals were pretreated with silymarin at 20 and 10 mg/kg prior to sodium fluoride consumption (600 ppm through drinking water). Vitamin C at 10 mg/kg was used as standard antioxidant. There was a significant increase in thiobarbituric acid reactive substances level (59.36 ± 2.19 nmol MDA eq/g tissue) along with a decrease in antioxidant enzymes activity (64.27 ± 1.98 U/g tissue for superoxide dismutase activity and 29.17 ± 1.01 µmol/min/mg protein for catalase activity) and reduced glutathione level (3.8 ± 0.15 µg/mg protein) in the tissues homogenates of the sodium fluoride-intoxicated rats. Silymarin administration to animals before sodium fluoride consumption modified the levels of biochemical parameters.

scholarly journals In vitro susceptibility of duck, chicken, and pig erythrocyte lipids to peroxidation

2012 ◽  
Vol 47 (No. 10 - 11) ◽  
pp. 303-308 ◽  
Author(s):  
B. Gradinski-Vrbanac ◽  
Z. Stojevič ◽  
S. Milinkovič-Tur ◽  
T. Balenovič ◽  
J. Piršljin ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Reduced Glutathione ◽  
Thiobarbituric Acid ◽  
Thiobarbituric Acid Reactive Substances ◽  
Erythrocyte Suspension ◽  
In Vitro Susceptibility ◽  
Before And After ◽  
High Level ◽  
Erythrocyte Lipid

The susceptibility of erythrocyte lipid to in vitro peroxidation as measured by TBARS (thiobarbituric acid-reactive substances) and concentration of reduced glutathione (GSH) in whole blood and erythrocyte suspension before and after incubation with hydrogen peroxide was assessed in ducks, chickens and pigs. A high susceptibility of erythrocytes to peroxidation in vitro was observed in all animals tested, but this susceptibility was of different intensity. Pig erythrocytes exhibited the lowest resistance to oxidative stress in vitro as compared with that in ducks (P &lt; 0.01) and chickens (P &lt; 0.02). A high level of GSH in the erythrocytes of ducks and chickens offers higher resistance to oxidative stress in comparison with that in the pig erythrocytes.

scholarly journals Silicone dioxide nano-particles enhance toxicity of lead on oxidative and nitro-oxidative stress

2017 ◽  
Author(s):  
I. A. Bandas ◽  
M. I. Kulitska ◽  
T. Ya. Yaroshenko ◽  
M. M. Korda
Keyword(s):  
Oxidative Stress ◽  
Superoxide Dismutase ◽  
Silicon Dioxide ◽  
Blood Serum ◽  
Lead Acetate ◽  
Reduced Glutathione ◽  
Thiobarbituric Acid ◽  
Thiobarbituric Acid Reactive Substances ◽  
Silicon Dioxide Nanoparticles ◽  
Modified Proteins

Introduction. Nanoparticles are widely used in scientific research, industry and medicine. The established capability of nanoparticles to increase the transport of chemicals and drugs into cells and through the body barriers makes the possibility of potentiating the chemical contaminants toxicity in case of their simultaneous intake an urgent matter.The aim of the study – to learn the effect of silicon dioxide nanoparticles on the ability of chemical lead acetate toxicant to cause oxidative and nitro-oxidative stress in blood serum and liver of experimental rats.Research Methods. Experiments were conducted on 40 white outbred male rats, 150–160 g in weight, which were divided into 4 groups. Animals of the group (control) 1 were daily administered with saline solution intragastrically. The rats of the group 2 were administered with colloidal solution of silicon dioxide nanoparticles in a dose of 50 mg/kg of body weight. Animals of the group 3 were injected with lead acetate in aqueous solution in a dose of 20 mg/kg of body weight (expressed as lead), the group 4 – with solution of silicon dioxide nanoparticles with lead acetate daily during 3 weeks at the same doses. The total activity of NO-synthase, catalase, superoxide dismutase, NOx content, thiobarbituric acid reactive substances, oxidized modified proteins, reduced glutathione, ceruloplasmin and total serum antioxidant activity were determined in serum and liver. The obtained parameters were statistically processed.Results and Discussion. It was proved that silicon dioxide nanoparticles did not influence the studied parameters considerably. The administration of lead acetate to rats caused significant changes of all indices. However, the maximum changes of the parameters were evidenced in the group of animals in cases of simultaneous administration of silicon dioxide nanoparticles and lead acetate. In that case, the content of thiobarbituric acid reactive substances, NOx, oxidized modified proteins, reduced glutathione, and superoxide dismutase activity in blood serum and liver homogenate of rats varied significantly compared with the parameters of the group of animals that were administered with the chemical toxicant only.Conclusion. Silicon dioxide nanoparticles enhance the capability of the chemical lead acetate toxicant to cause oxidative and nitro-oxidative stress in blood serum and liver of the experimental rats.

Association Between Magnesium and Oxidative Stress in Patients with Obesity

2020 ◽  
Vol 16 (5) ◽  
pp. 743-748
Author(s):  
Ana R.S. de Oliveira ◽  
Kyria J.C. Cruz ◽  
Jennifer B.S. Morais ◽  
Juliana S. Severo ◽  
Jéssica B. Beserra ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Thiobarbituric Acid ◽  
Magnesium Concentration ◽  
Control Group ◽  
Compensatory Mechanism ◽  
Thiobarbituric Acid Reactive Substances ◽  
Magnesium Intake ◽  
Significant Difference ◽  
Dietary Magnesium ◽  
And Control

Background: The role of minerals in preventing the generation of oxidative stress in obese individuals has been evaluated. Magnesium is an antioxidant nutrient and a cofactor of enzymes involved in the cell membrane stabilization, attenuating the effects of oxidative stress. Objective: To evaluate the association between magnesium and concentrations of thiobarbituric acid reactive substances (TBARS) in patients with obesity and eutrophic women. Methods: A cross-sectional study was conducted with 73 women, divided into two groups: case group (patients with obesity, n=27) and control group (eutrophic women, n=46). Measurements of body mass index and waist circumference were performed. Dietary magnesium intake was assessed by the three-day food record using the NutWin software. Urinary magnesium concentration was measured by atomic absorption spectrophotometry method. Plasma concentrations of thiobarbituric acid reactive substances (TBARS) were also determined. Results: Mean values of dietary magnesium intake were 161.59 ± 60.04 and 158.73 ± 31.96 for patients with obesity and control group, respectively, with no significant difference between the groups studied (p >0.05). The value of urinary excretion of magnesium was lower than the reference values in both groups, with no significant difference between the groups studied (p >0.05). The plasma concentration of thiobarbituric acid reactive substances was significantly higher in patients with obesity compared to the control group (p <0.001). There was no correlation between levels of magnesium biomarkers and the concentration of TBARS (p >0.05). Conclusion: Patients with obesity showed a reduced dietary magnesium intake which seems to induce hypomagnesuria as a compensatory mechanism. The marker of oxidative stress evaluated in this study was not influenced by magnesium.

scholarly journals Antioxidant Activity of the Isoflavonoids from the Roots of Maackia amurensis

2013 ◽  
Vol 8 (5) ◽  
pp. 1934578X1300800 ◽  
Author(s):  
Nadezda I. Kulesh ◽  
Sergey A. Fedoreyev ◽  
Marina V. Veselova ◽  
Natalia P. Mischenko ◽  
Vladimir A. Denisenko ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Activity ◽  
Glutathione Peroxidase ◽  
Column Chromatography ◽  
Thiobarbituric Acid ◽  
Formalin Injection ◽  
Thiobarbituric Acid Reactive Substances ◽  
H Nmr ◽  
Maackia Amurensis

Seven isoflavonoids, including a new glycoside, (6a R,11a R)-medicarpin-3- O-gentiobioside (6), were isolated from the roots of Maackia amurensis using repeated column chromatography on a Toyopearl HW-50F sorbent and identified by HPLC–PDA–MS, 1H NMR, 13C, 1H–1H COSY, HSQC NMR and HMBC NMR analyses as daidzin (1), genistein-7- O-gentiobioside (2), pseudobaptigenin-7- O-gentiobioside (3), formononetin-7- O-gentiobioside (4), (6a R,11a R)-maackiain-3- O-gentiobioside (5), and 5- O-methylgenistein-7- O-gentiobioside (7). In the model of oxidative stress induced by formalin injection, the isolated isoflavone and pterocarpan glucosides 1-7 were shown to reduce the formation of malondialdehyde (MDA) and other thiobarbituric acid reactive substances (TBARS), as well as glutathione peroxidase (GPO) activity in rats.

scholarly journals Oxidative stress in patients on mechanical ventilation

2009 ◽  
Vol 62 (11-12) ◽  
pp. 578-581
Author(s):  
Vesna Marjanovic ◽  
Vidosava Djordjevic ◽  
Goran Marjanovic
Keyword(s):  
Oxidative Stress ◽  
Mechanical Ventilation ◽  
Head Injuries ◽  
Lipid Peroxide ◽  
Thiobarbituric Acid ◽  
Lactic Dehydrogenase ◽  
Lung Damage ◽  
Thiobarbituric Acid Reactive Substances ◽  
Acid Base Balance ◽  
Arterial Blood

Introduction. The appearance and intensity of oxidative stress were analyzed in the course of mechanical ventilation and parameters that could point toward potential lung damage. Material and methods. In three time intervals on day 1, 3 and 7 of mechanical ventilation, parameters such as: triglycerides, cholesterol, lactate, serum lactic dehydrogenase, acid-base balance and lipid peroxidation products - thiobarbituric acid reactive substances, were followed in 30 patients with head injuries. Results. A decrease in the level of partial oxygen pressure (PaO2) (p<0.01) and PaO2/FiO2 index (p<0.05) in arterial blood was recorded on day 3 of mechanical ventilation. This was accompanied with an increase in alveolar-arterial difference (AaDO2) (p<0.05), thiobarbituric acid reactive substances (p<0.001) and lactic dehydrogenase (p<0.001) comparing to day 1 of mechanical ventilation. The patients with initial PaO2>120 mmHg, had significant increase of thiobarbituric acid reactive substances and AaDO2 (p<0.05) and fall of PaO2 (p<0.001) on day 3 of mechanical ventilation. Conclusion. Oxidative stress and lipid peroxide production are increased during third day of mechanical ventilation leading to disruption of oxygen diffusion through alveolar-capillary membrane and reduction of parameters of oxygenation.

Oxidative stress after human exercise: effect of N-acetylcysteine supplementation

1994 ◽  
Vol 76 (6) ◽  
pp. 2570-2577 ◽  
Author(s):  
C. K. Sen ◽  
T. Rankinen ◽  
S. Vaisanen ◽  
R. Rauramaa
Keyword(s):  
Oxidative Stress ◽  
Exercise Intensity ◽  
Radical Scavenging ◽  
Thiobarbituric Acid ◽  
Bicycle Ergometer ◽  
Thiobarbituric Acid Reactive Substances ◽  
Ergometer Exercise ◽  
Single Bout ◽  
Exercise Effect ◽  
Leukocyte Dna Damage

The association between exercise intensity and related oxidative stress was investigated in nine men who exercised for 30 min at their aerobic (AeT) and anaerobic (AnaeT) thresholds. We also tested the effect of oral N-acetylcysteine (NAC) on exercise-associated rapid blood glutathione (GSH) oxidation in subjects performing two identical maximal bicycle ergometer exercise (Max) tests. Before the second test (Max with NAC supplementation [Max(NAC)]), the men took 200 x 4 mg/day of NAC tablets for 2 days and an additional 800 mg on the test morning. Blood samples were drawn before, immediately after, and 24 h after the tests. Total and oxidized GSH levels in blood were determined. Plasma thiobarbituric acid-reactive substances and net peroxyl radical scavenging capacity (PSC) were assayed. Exercise-associated damage in leukocyte DNA was estimated by fluorometric analysis of DNA unwinding. A single bout of exercise at Max, AeT, and AnaeT resulted in a significant increase in blood GSH oxidation but did not influence net PSC of plasma. Although an association between a single bout of exercise and leukocyte DNA damage was apparent, this study suggests that the parameter may not serve as a sensitive index to assess the role of exercise intensity in the extent of exercise-associated oxidative stress. Plasma thiobarbituric acid-reactive substances did not change after either Max or Max(NAC) tests. NAC supplementation resulted in an increase in preexercise PSC, indicating a higher net antioxidant capacity of the plasma, but did not affect blood GSH.(ABSTRACT TRUNCATED AT 250 WORDS)

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