Research of indicators of the endogenous antioxidant system in rats affected with sodium nitrite on the background of tobacco intoxication

Authors

DOI:

https://doi.org/10.15587/2519-8025.2017.113539

Keywords:

injuries, white rats, oxidative stress, active forms of oxygen antioxidant system

Abstract

Under conditions of progression of environmental pollution, the one of priority directions of toxicology and medicine is the study of features and mechanisms of the combined effect of xenobiotics – risk factors of many ecologically depending diseases. In last years there is widely studied the influence of tobacco smoking on the human organism. The numerous researches proved that the wide use of mineral fertilizers in agriculture resulted in environmental pollution, especially pollution of atmospheric air, drinking water and food and created the real threat for life of both human and other living beings. All these anthropogenic toxicants penetrate the human organism and lead to the oxidative stress and activation of free radical processes in the organism and imbalance in functioning of pro- and antioxidant systems.

The aim of the research is to establish the level of the oxidative stress and activity of indicators of the system of antioxidant defense in rats, injured with sodium nitrite on the background of 45 days tobacco intoxication for choosing adequate schemes of correction of detected disorders.

Experiments were realized on non-linear white male rats of different age groups, who underwent the effect of tobacco smoke during 45 days. Two groups of animals, injured by smoke, received sodium nitrite in dose 45 mg / kg of body mass for 24 hours and 72 hours before the end of experiment. Euthanasia was realized under thiopental anesthesia. Blood, blood serum liver and kidneys were taken for the study.

For determining AOF, there was realized extraction of blood neutrophils by the method of gradient centrifugation. For measuring AOF level in neutrophils, dichlofluorescein diacetate was used. The level of AOF production was analyzed by the intensity of dye stuff lighting on the current cytometer. Catalase activity in the reaction with ammonium molybdate, superoxide dismutase activity with nitrotetrazolium blue, the content of restored glutathione at interaction of Ellman reagent with free SH-groups were determined in blood serum and tissues. The content of ceruloplasmin in blood serum was determined by the reaction of para-phenylendiamine oxidation.

The studies were realized observing general principles of experiments on animals, coordinated with statements of the European convention about protection of vertebral animals, used for experimental and other scientific aims.

Rats of all age groups, injured by tobacco smoke demonstrated the increase of AOF level in blood that resulted in the oxidative process development in the organism. The synchronous intoxication of rats with tobacco smoke and sodium nitrite deepened even more all detected disorders that testify to the reliable (p≤0,05) increase of AOF that acquired the maximal values in immature animals. The oxidative stress, observed in the organism of rats of all age groups, caused inhibition of antioxidant enzymes activity: superoxide dismutase, catalase and decrease of the non-enzyme component of the antioxidant system – restored glutathione. The synchronous injure of animals by sodium nitrite and tobacco smoke resulted in the decrease of catalase activity in lungs of mature rats in 2,4times compared with intact animals in the final term of the study. After sodium nitrite intoxication of rats, toxicated by smoke, the content of restored glutathione was maximally decreased in the liver of mature rats (in 4,5 times). Most expressed changes of indicators of the antioxidant system were observed in blood serum and organs of mature rats

Author Biography

Petro Lykhatskyi, I. Horbachevsky Ternopil State Medical University Voli sq., 1, Ternopil, Ukraine, 46001

PhD, Associate Professor

Department of medical biochemistry

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Published

2017-10-31

How to Cite

Lykhatskyi, P. (2017). Research of indicators of the endogenous antioxidant system in rats affected with sodium nitrite on the background of tobacco intoxication. ScienceRise: Biological Science, (5 (8), 18–23. https://doi.org/10.15587/2519-8025.2017.113539

Issue

No. 5 (8) (2017)

Section

Biological Sciences

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Copyright (c) 2017 Petro Lykhatskyi

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