Human sperm glutathione reductase activity in situ reveals limitation in the glutathione antioxidant defense system due to supply of NADPH

Author(s):  
Bayard T. Storey ◽  
Juan G. Alvarez ◽  
Kathleen A. Thompson
2016 ◽  
Vol 18 (2(66)) ◽  
pp. 112-116
Author(s):  
P.Y. Lavriv

The article  deals with the results of experimental research data of relationship between the antioxidant defense system and lipid body peroxidation of high calves cows  under  the influence of nanpreparation Germakap conducted  with simultaneous vaccination with inactivated formol vaccination with repeated  in two weeks later  at the same doses as their  stability and immunity to Salmonella. It was found the likely increase in activity of glutathione peroxidase and glutathione reductase and at the same time, reduction of malon dialdehyde and hydroperoxides lipids and superoxidimutase. These changes in animals  body occur due to complex components adaptive nan preparation Germakap that lead to the normalization of metabolic and free radical processes in animals.  However, the increase in the catalytic activity of glutathione peroxidase and glutathione reductase activity in plasma of high calves cows  from research group can be explained by increasing intensity of synthesis in which these enzymes by introducing nan preparation Germakap closely associated with the regeneration of glutathione in the cell, and also the activity of glutathione peroxidase.  Through interaction with restoration of glutathione and glutathione peroxidase, glutathione reductase it was formed glutathione system that protects cells from stress peroxidation


2003 ◽  
Vol 50 (3) ◽  
pp. 825-835 ◽  
Author(s):  
Agnieszka Zatorska ◽  
Janusz Maszewski ◽  
Zofia Jóźwiak

We investigated the effect of daunorubicin on glutathione content and activity of GSH-related enzymes in cultured normal and diabetic human fibroblasts. Cells were incubated with 4 microM daunorubicin (DNR) for 2 h followed by culture in drug-free medium for up to 72 h. Treatment of diabetic cells with the drug caused a time-dependent depletion of intracellular GSH and a decrease of the GSH to total glutathione ratio. GSH depletion was accompanied by apoptotic changes in morphology of the nucleus. Analysis of GSH-related enzymes showed a significant increase of the activities of Se-dependent and Se-independent peroxidases and glutathione S-transferase. In contrast, glutathione reductase activity was reduced by 50%. Significant differences between normal and diabetic cells exposed to DNR were observed in the level of GST and Se-dependent glutathione peroxidase activities. These findings indicated that daunorubicin efficiently affects the GSH antioxidant defense system both in normal and diabetic fibroblasts leading to disturbances in glutathione content as well as in the activity of GSH-related enzymes.


2015 ◽  
Vol 80 (9) ◽  
pp. 1178-1185 ◽  
Author(s):  
V. V. Evdokimov ◽  
K. V. Barinova ◽  
V. B. Turovetskii ◽  
V. I. Muronetz ◽  
E. V. Schmalhausen

2016 ◽  
Vol 18 (2(66)) ◽  
pp. 100-112 ◽  
Author(s):  
Y.Y. Lavryshyn ◽  
I.S. Varkholyak ◽  
T.V. Martyschuk ◽  
Z.А. Guta ◽  
L.B. Ivankiv

In the review of  the literature it was generalized the data due to the classification and characterization of antioxidant protection system of animals body. This model combines a number of different by its nature substances. Each of the components of the antioxidant system operates in close relationship with its other structural elements, harmoniously, and in many cases complements and in many cases - enhances the action of each other. Glutathione system forms functional basis of antioxidant defense system, constituent elements of which has its own glutathione and enzymes, which catalyze the reaction of its reverse transformation (oxidation ↔ recovery). Glutathione peroxidase, glutathione reductase and glucose-6-phosphate dehydrogenase are attributed to these enzymes.Most researchers conventionally distributed antioxidant defense system in enzyme and non-enzyme. Catalase, superoxide dismutase, glutathione peroxidase, glutathione reductase, glutathione transferase and other enzymes are included to enzymatic link of antioxidant defense system. Fat-soluble vitamins A, E and K, water-soluble vitamins C and PP, biogenic amines, glutathione, carotenoids, ubiquinone, sterols are included to  non-enzyme system. As the enzyme, as non-enzyme antioxidant defense system is present in the bloodstream. The activity of enzymatic antioxidant system is well regulated and depends on the age of the animals, physiological condition, the dynamics of hormone, synthesis intensity of antioxidant enzyme, pH  medium, the presence of coenzymes, inhibitors, activators, and other factors. Non-enzyme link of antioxidant system does not need so many regulators as the most chemical substance - antioxidant - enters into chemical reaction with the radical. The rate of reaction may be only changed.


2020 ◽  
Vol 11 (3) ◽  
pp. 10996-11008

The goal of our study was to examine the effect of feed supplement Humilid on the antioxidant defense system, free radical processes, and histomorphological changes in the tissues of rats affected by Chromium (VI). Rats were divided into 4 groups. Animals of groups D2 and D3 received Humilid in a dose of 2 ml per kg of body weight for 28 days. From the 14th day of the experiment, rats of groups D1 and D2 were injected by K2Cr2O7 in a dose of 2 mg Cr per kg of body weight daily for 14 days. Control animals were injected with saline solution for 14 days. Results showed that Cr (VI) causes oxidative stress in rat tissues, accompanied by an increase in superoxide dismutase activity, lipid peroxidation products, and a decrease in glutathione peroxidase and glutathione reductase activity. Chromium also caused histopathological changes in the liver and kidney of rats. Watering of rats affected by Cr (VI) with Humilid leads to decreased oxidative processes, activation of the antioxidant defense system, and reduced pathological effects on animal tissues. Our results indicate the positive influence of Humilid on the rat’s organism, inhibiting free radical processes and exhibiting antioxidant, hepatoprotective, and adaptive properties.


Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 585 ◽  
Author(s):  
Ilona Sadauskiene ◽  
Arunas Liekis ◽  
Inga Staneviciene ◽  
Rima Naginiene ◽  
Leonid Ivanov

The aim of this study was to investigate the effects of aluminum (Al) or selenium (Se) on the “primary” antioxidant defense system enzymes (superoxide dismutase, catalase, and glutathione reductase) in cells of mouse brain and liver after long-term (8-week) exposure to drinking water supplemented with AlCl3 (50 mg or 100 mg Al/L in drinking water) or Na2SeO3 (0.2 mg or 0.4 mg Se/L in drinking water). Results have shown that a high dose of Se increased the activities of superoxide dismutase and catalase in mouse brain and liver. Exposure to a low dose of Se resulted in an increase in catalase activity in mouse brain, but did not show any statistically significant changes in superoxide dismutase activity in both organs. Meanwhile, the administration of both doses of Al caused no changes in activities of these enzymes in mouse brain and liver. The greatest sensitivity to the effect of Al or Se was exhibited by glutathione reductase. Exposure to both doses of Al or Se resulted in statistically significant increase in glutathione reductase activity in both brain and liver. It was concluded that 8-week exposure to Se caused a statistically significant increase in superoxide dismutase, catalase and glutathione reductase activities in mouse brain and/or liver, however, these changes were dependent on the used dose. The exposure to both Al doses caused a statistically significant increase only in glutathione reductase activity of both organs.


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