scholarly journals Post-hypoxic reaction of astrocytes of the visual cortex in the experiment

2017 ◽  
Vol 98 (6) ◽  
pp. 984-988 ◽  
Author(s):  
G A Drozdova ◽  
A F Samigullina ◽  
Ye A Nurgaleeva ◽  
G A Bayburina ◽  
A A Sorokin
Keyword(s):  
Superoxide Dismutase ◽  
Visual Cortex ◽  
Reduced Glutathione ◽  
Circulatory Arrest ◽  
Free Radical Oxidation ◽  
Acidic Protein ◽  
Radical Oxidation ◽  
Experimental Animals ◽  
White Rats ◽  
Neurospecific Protein

Aim. To study the nature of reactive changes in astrocytic glia and oxidative metabolic status in the visual cortex of experimental animals after acute circulatory arrest. Methods. A series of experiments was performed on 47 mature males of noninbred white rats weighing 150-180 g. Under general ethereal anesthesia, a 5-minute anoxia was modelled by intrathoracic clamping of the vascular bundle of the heart followed by resuscitation and observation of the general state dynamics of the animals within 5 weeks after revitalization. Morphometric characteristics of reactive astrogliosis were studied with evaluation of a neurospecific protein (glial fibrillary acidic protein) by immunohistochemistry. The processes of free radical oxidation in brain homogenates were evaluated by determination of products reacting with thiobarbituric acid and by chemiluminescence analysis. The state of antioxidant system in the studied tissues was determined by recording the activity of superoxide dismutase and the level of reduced glutathione. Results. Regarding astroglial link, significant expression of glial fibrillar acidic protein was recorded throughout the observation period with maximum intensification on day 21 of the experiment. In the early periods and during the second week after recovery, the increase of the light sum of iron-induced chemiluminescence was noted, followed by a prolonged accumulation of secondary metabolites of lipid peroxidation. The investigated level of superoxide dismutase significantly increased not only on days 1-3, but also during the second week of the postresuscitation period. When assessing the level of reduced glutathione, a significant increase of its content occured during the first three days after recovery. Conclusion. The revealed activation of a neurospecific protein production with preceding shifts in pro- and antioxidative systems is indicative of hyperreactive character of astrogliosis formed in brain structures against the continuous oxidative stress, disrupting the functioning of neural networks in the visual cortex of experimental animals.

scholarly journals INFLUENCE OF ELECTROMAGNETIC RADIATION ON THE PERMEABILITY OF ERYTHROCYTE MEMBRANES

2021 ◽  
Vol 10 (4) ◽  
pp. 43-49
Author(s):  
A. D. Selin ◽  
N. A. Terekhina ◽  
G. A. Terekhin
Keyword(s):  
Electromagnetic Radiation ◽  
Reduced Glutathione ◽  
Free Radical Oxidation ◽  
Erythrocyte Membranes ◽  
Control Group ◽  
Prolonged Stay ◽  
Radical Oxidation ◽  
White Rats ◽  
Maximum Value ◽  
Decimeter Range

The purpose of the survey is to experimentally study the influence of electromagnetic radiation from the decimeter range on the permeability of erythrocyte membranes. The object of the study was the blood of 80 white rats, 60 of them for three months were under the influence of electromagnetic radiation of the decimeter range. 20 animals of the control group were not exposed to electromagnetic fields. The intensity of free radical oxidation was evaluated using chemiluminescent analysis of red blood cells and blood plasma. The permeability of erythrocyte membranes and the content of reduced glutathione in blood erythrocytes were determined spectrophotometrically. A prolonged stay of animals under the influence of an electromagnetic field leads to pronounced changes in chemiluminescence indices in erythrocytes: a decrease in the maximum intensity of chemiluminescence (Imax), light sum (S), and light sum after the maximum value of chemiluminescence (Simax). Despite the increase in the content of glutathione and the chemiluminescent analysis index tg2 reflecting the antioxidant potential, there is an increase in the permeability of erythrocyte membranes under the influence of electromagnetic radiation

State of the enzyme link of antioxidant protection in boys with hypoandrogenism

2020 ◽  
Vol 40 (4) ◽  
pp. 32-36
Author(s):  
L. K. Parkhomenko ◽  
◽  
L. A. Strashok ◽  
S. I. Turchina ◽  
G. V. Kosovtsova ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Superoxide Dismutase ◽  
Free Radical ◽  
Glutathione Peroxidase ◽  
Free Radical Oxidation ◽  
Conjugated Dienes ◽  
Delayed Puberty ◽  
Control Group ◽  
Antioxidant Protection ◽  
Radical Oxidation

Recently, interest in the problem of free radical oxidation in biological membranes, which is directly related to both the normal functioning of cells and the occurrence, course and outcome of many pathological conditions, has increased again in clinical medicine. The aim was to determine the role and impact of antioxidant defense in boys with hypoandrogenism. The study involved 75 adolescents with hypoandrogenism aged 13–18 years, who underwent a complex of clinical and laboratory examinations. All patients were conducted complex of anthropometric research and determination of the degree of delayed puberty, laboratory and instrumental examination. Free radical oxidation was determined by the levels of malondialdehyde, conjugated dienes, carbonated proteins, superoxide dismutase and catalase in the serum, and restored glutathione and glutathione peroxidase in whole blood. Based on their determination, the coefficient of oxidative stress was calculated. Statistical processing of results was performed using parametric and nonparametric methods. The study of indicators of the free radical oxidation process found that adolescents with hypoandrogenism have multidirectional changes in the oxidation of proteins and lipids, namely: the level of conjugated dienes increases, the concentration of malondialdehyde remains at the level of the control group, and the level of carbonated proteins tends to decrease. As for the activity of antioxidant protection enzymes, a significant decrease in the level of glutathione peroxidase was detected, while the level of superoxide dismutase and catalase remained at the level of normative indicators. Oxidative stress accompanies and is one of the pathogenetic links in the formation or maintenance of the state of hypoandrogenism in boys. This requires the use of antioxidants, the complex of which must be selected individually.

Analysis of the content of zinc ions in the ejaculate of men with inflammatory diseases of the genitourinary system with indicators of sperm motility

2021 ◽  
pp. 28-32
Author(s):  
O.A. Gizinger
Keyword(s):  
Superoxide Dismutase ◽  
Plasma Membrane ◽  
Free Radical ◽  
Seminal Plasma ◽  
Inflammatory Diseases ◽  
Free Radical Oxidation ◽  
Zinc Ions ◽  
Radical Oxidation ◽  
Genitourinary System ◽  
Sperm Dna

The results of previous studies have shown that the content of zinc ions in the semen significantly correlated with the number of sperm and influenced the volume of ejaculate. After ejaculation, the zinc contained in the seminal plasma binds to the plasma membrane and stabilizes the sperm DNA. Due to its cyto- and immunoprotective properties: induction of zinc-dependent superoxide dismutase, protection of DNA and transcriptional proteins from free radical oxidation, inhibition of proteinases, zinc is an indispensable trace element in the processes of DNA synthesis and repair, embryogenesis and reproduction.

scholarly journals Evaluation of selenium status and effectiveness of selenolin in the treatment of selenium-dependent hepatopathies

2021 ◽  
Vol 262 ◽  
pp. 02004
Author(s):  
Vladimir A. Grin ◽  
Eugenia V. Rogaleva ◽  
Marina P. Semenenko ◽  
Ksenia A. Semenenko ◽  
Elena V. Kuzminova
Keyword(s):  
Lipid Peroxidation ◽  
Free Radical ◽  
Liver Diseases ◽  
Clinical Status ◽  
Clinical Signs ◽  
Free Radical Oxidation ◽  
Selenium Status ◽  
Radical Oxidation ◽  
Experimental Animals ◽  
Oxidation Processes

The article is devoted to the study of the assessment of selenium status in the pathogenesis of liver diseases and the effectiveness of the use of a selenium-containing drug. In the course of studies in animals with clinical signs and high rates of hepatopathies markers – transaminases, in 100% of cases a low level of selenium was revealed – 0.026 ±0.01 μg / ml, because of the increased consumption of this microelement on the background of increased free radical oxidation processes in the liver tissue. It was found that intramuscular administration of the drug selenolin at a dose of 20 mg / 100 kg four times with an interval of 15 days significantly improved the clinical status of the experimental animals; the effectiveness of therapy was 93.3%. Parenteral administration of selenolin favorably corrected the processes of lipid peroxidation and contributed to a significant (p <0.01) decrease in the level of liver indicator enzymes in comparison with the control by 34.5% (aspartate aminotransferase) and by 45.8% (alanine aminotransferase), and also contributed to an increase in the level of selenium to the level of the physiological norm (0.068 ± 0.03 μg / ml).

scholarly journals Some indicators of free radical oxidation and antioxidant protection in the erythrocytes of former athletes

2021 ◽  
Vol 11 (3) ◽  
pp. 12-17
Author(s):  
A. V. Elikov
Keyword(s):  
Superoxide Dismutase ◽  
Free Radical ◽  
Free Radical Oxidation ◽  
The State ◽  
Control Group ◽  
Enzymatic Antioxidants ◽  
Antioxidant Protection ◽  
Radical Oxidation ◽  
Former Athletes ◽  
Oxidative Balance

Objective: to study the main indicators of free radical oxidation and antioxidant protection in the erythrocytes of former athletes, depending on the period of termination of sports.Materials and methods: 24 former male athletes aged 19–29 years were examined, who were divided into 2 groups of 12 people each (1st group — former athletes who stopped training for up to 2 years; 2nd — over 2 years). The control group consisted of 15 practically healthy untrained student volunteers of the same age. In erythrocytes, spectrophotometrically (spectrophotometer Shimadzu 1240, Japan), the activity of antioxidant enzymes was determined: superoxide dismutase (SOD) (K.F. 1.15.1.1) — by inhibiting the reduction of nitro blue tetrazolium by superoxide anion radical at λ = 540 nm, after preliminary processing of erythrocytes by the method of Dubinina E.E. and others [8]; catalase (K.F. 1.11.1.6) — according to the rate of utilization of hydrogen peroxide at λ = 260 nm; glutathione peroxidase (HP) (KF 1.11.1.9) — by the change in the content of reduced glutathione in samples before and after incubation of the substrate with dithiobis-nitrobenzoic acid at λ = 412 nm; glutathione reductase (GR) (K.F. 1.6.4.2) — according to the catalytic NADPH ∙ H+-dependent transformation of the oxidized form of glutathione into the reduced form, the intensity of which was estimated by the rate of decrease in the extinction of samples at λ = 340 nm, at which the NADPH H+ solution has a maximum light absorption (Warburg test).Results: the direction of the shifts in the state of the oxidative balance was established depending on the period of detraining. A significantly lower value of the total antioxidant activity was revealed in the former athletes of the 1st group. This phenomenon is probably associated with a decrease in the efficiency of the enzymatic link of the antioxidant defense in the absence of regular physical exertion, and, as a consequence, an increased consumption of non-enzymatic antioxidants. It was found that the early post-sports period is characterized by significantly lower, in comparison with the control group, the values of the activity of the first-order enzymes (superoxide dismutase) against the background of the increased activity of the second-order enzymes (catalase).Conclusions: the obtained data can be recommended for monitoring the state of athletes who stopped playing sports and taken into account when prescribing rehabilitation measures for the corresponding contingent.

scholarly journals Changes of redox reactions in the lung tissue under burn injury and combined application of lyophilized xenographt substrate and exogenous surfactant preparation

2015 ◽  
Vol 17 (3) ◽  
Author(s):  
Z. M. Nebesna ◽  
К. S. Volkov ◽  
N. Ye. Lisnychuk ◽  
І. Ya. Demkiv
Keyword(s):  
Redox Reactions ◽  
Burn Injury ◽  
Free Radical Oxidation ◽  
The Body ◽  
Exogenous Surfactant ◽  
Radical Oxidation ◽  
Experimental Animals ◽  
Combined Application ◽  
Surfactant Preparation ◽  
Peroxidation Processes

<p>Oxidative stress in the body of the experimental animals after burn injury arises and develops on the background<br />of activation of free radical oxidation and decrease of antioxidant activity and increase of endotoxemia. The combined<br />use of surfactant preparation and lyophilized xenographt substrate after skin burns lead to a significant decrease of<br />endotoxemia, inhibition of lipid peroxidation processes and restoring functional activity of antioxidant protection.</p>

scholarly journals Characteristics of influence of 4-[4-oxo-3 h-quinazoline-3-yl] benzoic acid (pc-66) on a course of adrenaline myocardiodystrophy in rats according to biochemical research

2017 ◽  
Author(s):  
O. V. Dzhyhaliuk ◽  
H. I. Stepaniuk ◽  
N. V. Zaichko ◽  
S. I. Kovalenko ◽  
K. P. Shabelnyk
Keyword(s):  
Superoxide Dismutase ◽  
Free Radical ◽  
Glutathione Peroxidase ◽  
Benzoic Acid ◽  
Free Radical Oxidation ◽  
Control Group ◽  
No Production ◽  
Marker Enzymes ◽  
Radical Oxidation ◽  
Group I

According to the literature the leading cause of mortality among the population of Ukraine are cardiovascular diseases, what incidence tripled over the past 25 years and today stands at801.6 in100 000. It necessitates a search for new chemical compounds, suitable for creating manufacturing with a better safety profile and a high degree of efficiency.The aim of the study was to describe the effect of 4-[4-oxo-4N-quinazoline-3- il] benzoic acid (PC-66), compared with kordaron on the processes of free radical oxidation, endothelial nitric oxide production and activity of marker enzymes cytolysis cardiomyocytes adrenaline myocardiodystrophy (AMD) in rats.The study was conducted on 28 nonlinear rats of both sexes (weight – 165–220 grams), divided into four groups: group I (n = 7) – intact rats; group II (n = 7) – rats with untreated AMD (control); group III (n = 7) – rats with AMD treated with entity PC-66 (10 mg/kg intraperitoneally (i/p)); Group IV (n = 7) – rats with AMD treated with kordaron (10 mg/kg, i/p).Research shown that the development of a pilot AMD in rats was characterized by increased free radical oxidation processes, depletion of antioxidant defense system (with decreased content of G-SH, activity of superoxide dismutase and glutathione peroxidase), oppression of endothelial NO production. The most expressive metabolic disturbances were registered in the acute period of AMD (as of 2nd day). The use of 4-[4-oxo-4N-quinazoline-3-il] benzoic acid (PC-66, 10 mg/kg, i/p) provided an expressive cardioprotective effect which was compared with kordaron (10 mg/kg, i/p) at various stages of AMD.The mechanisms of cardioprotective action 4-[4-oxo-4N-quinazoline-3-il] benzoic acid can be realized due to the stabilization of cellular and subcellular membranes (as evidenced by the dynamics of marker enzymes cytolysis cardiomyocytes in serum and reduction of TBA-reactive substances in the myocardium), increasing the efficiency of the antioxidant system and correction of cellular redox buffer (as evidenced by the increasing pool of reduced glutathione, glutathione peroxidase and superoxide dismutase activity increased) and anti-ischemic activity associated with increased activity of endothelial NO synthase in cardiac muscle.

scholarly journals Intensity of free radical processes in cartilage of rats with collagen-induced arthritis

2016 ◽  
Vol 21 (2) ◽  
pp. 27-30
Author(s):  
E. Tihova ◽  
O. Bernyk ◽  
O. Savchuk ◽  
K. Dvorshchenko ◽  
L. Ostapchenko
Keyword(s):  
Superoxide Dismutase ◽  
Antioxidant Enzymes ◽  
Free Radical ◽  
Experimental Model ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Free Radical Oxidation ◽  
Collagen Induced Arthritis ◽  
Radical Oxidation ◽  
Radical Processes

Products of free radical oxidation and antioxidant enzymes in rats with collagen-induced arthritis were studied. It was established, that under experimental model of arthritis in rat cartilage the content of superoxide anion radical, peroxide and TBA-active compounds and the activity of antiradical enzymes superoxide dismutase and catalase increased.

scholarly journals The activities of superoxide dismutase, catalase, glutathione peroxidase and glutathione reductase in erythrocytes of rats with experimental neoplastic disease.

1996 ◽  
Vol 43 (2) ◽  
pp. 403-405 ◽  
Author(s):  
J Batko ◽  
T Warchoł ◽  
H Karoń
Keyword(s):  
Superoxide Dismutase ◽  
Glutathione Peroxidase ◽  
Tumor Growth ◽  
Glutathione Reductase ◽  
Reduced Glutathione ◽  
The Other ◽  
Second Phase ◽  
Neoplastic Disease ◽  
Experimental Animals ◽  
Morris Hepatoma

In erythrocytes of rats bearing Morris hepatoma 5123 the activities of superoxide dismutase, glutathione peroxidase and glutathione reductase as well as the level of reduced glutathione increased on the 10th day after transplantation of the tumor. In the second phase of the tumor growth (20 days after transplantation), the activities of glutathione peroxidase, glutathione reductase and the level of reduced glutathione in erythrocytes of the experimental animals were lower than in controls, whereas the activity of superoxide dismutase was at that time higher than in controls. On the other hand, the activity of catalase did not significantly differ from that found in healthy rats.

scholarly journals EVALUATION OF ANTIOXIDANT ACTIVITY OF PLANT AGENTS

2020 ◽  
pp. 187-193
Author(s):  
Yekaterina Vladimirovna Ferubko ◽  
Valeriy Nikolayevich Zelenkov ◽  
Anatoliy Andreyevich Lapin ◽  
Tamara Darizhapovna Dargayeva
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Lipid Analysis ◽  
Free Radical Oxidation ◽  
Inhibitory Effect ◽  
Total Antioxidant Activity ◽  
Radical Oxidation ◽  
White Rats ◽  
Total Antioxidant

The aim of the research is to determine the total antioxidant activity of in vitro collection of antihepatotoxic action consisting of roots and rhizomes of Inula helenium L., grass Centaurium erythraea Rafn., flowers Tanacetum vulgare L., fruits Rosa sp., fruits of Crataegus sp. аnd its separate components by the method of colonometric titration and determination of antioxidant activity of dry extract (conditional name "Pentafite") obtained from this collection under conditions of experimental tetrachloride of carbon hepatitis in white rats. A method of chemiluminescent lipid analysis was used to evaluate the free radical oxidation of lipids in liver in test animals. It has been found that collection of antihepatotoxic action and plants included in it have antioxidant activity in vitro, at the same time synergistic effect on manifestation of total antioxidant activity of collection is revealed. Pharmacotherapy of experimental hepatitis in experimental rats by administration of Pentafite at a dose of 300 mg/kg has been found to significantly reduce the chemiluminometric values of lipids, which characterize the intensity of free radical reactions. "Pentafite" has a pronounced inhibitory effect on hyperlipoperoxidation in animal liver in case of toxic damage to it. The established antioxidant activity of collecting antihepatotoxic action and Pentafite extract may be important for their use in the treatment and prevention of hepatobiliary diseases.

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