scholarly journals The aspects of free radical oxidation in the lungs of rats with pleurisy under long-term lighting

Author(s):  
O. M. Larycheva ◽  
L. D. Chebotar ◽  
T. Ya. Yaroshenko

Introduction.Pathological changes in human body due to light exposure at night are triggered by circadian disruption, inhibition of melatonin secretion by the pineal gland at night that leads to its reduction in blood. Clinical and experimental data indicate high importance of free radical oxidation inthe pathogenesis of pulmonary diseases. The aim of the study – to explore the influence of a melatonin deficiencyin addition to pleurisy on free radical oxidation in the tissues of the lungs of rats exposed to light for 30 days.Research Methods. Experiments were carried out on male albino Wistar rats. The animals were randomized into four groups with 7 animals in each: an intact group, 30 day pineal gland hypofunction, carrageenan pleurisy, 30 day pineal gland hypofunction with carrageenan pleurisy. Pineal gland hypofunction was modeled by 1500 lx fluorescent lamps around the clock. The experimental pleurisy was induced in anesthetized animals by intrapleural injection of 0.1 ml of carrageenan. Superoxide (•О2-) products were determined by the reaction with nitro blue tetrazolium under the influence of NADH, NADP and pirogenal. The concentration of diene conjugates was determined by I.D. Stalna technique, TBA-active products – by I.D. Stalna, T.H. Harishvili method, trienes, ketodienes, - by a modified method based on the molar extinction coefficient.Results and Discussion.Assessingthe intensity of the reactive oxygen species (ROS) generation, a significantincrease of the •О2-level in all sources of its generation in the tissues of the lungs has been observed both in the control group with pleurisy and in the rats with 30-day pineal gland hypofunctionandpleurisy, compared to the intact animals.The chronic pineal gland hypofunction in the animals with experimental pleurisy lead to •О2- generationby the microsomal electron transport chain (ETC) by 54.6 % (р<0.05) when compared with carrageenan group of rats. No significant changes in concentration of the lipid peroxidation products has been observed in the animals with pleurisy during long-term light exposure.Conclusions. Chronic hypofunction of the pineal gland with the carrageenan-induced pleurisy causes activation of the free radical processes in the rats’ lung tissues and occur as hyperproduction of the superoxide anion radical by the microsomal chain of oxidation. This fact denotes probable abnormalities in the function of the microsomal electron transport chains especially under the condition change of properties of dehydrogenases. 

Author(s):  
L. K. Parkhomenko ◽  
◽  
L. A. Strashok ◽  
S. I. Turchina ◽  
G. V. Kosovtsova ◽  
...  

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.


2015 ◽  
Vol 96 (3) ◽  
pp. 302-306
Author(s):  
T Z Zakiev ◽  
S R Tuysin ◽  
O V Galimov ◽  
A R Gil’fanov ◽  
R D Sagdeev

Aim. To study the effects of combined dressings on the processes of free radical oxidation in patients with purulent wounds.Methods. The performance of luminol-dependent chemiluminescence of whole blood from 30 healthy donors and 122 patients with purulent wounds, as well as tissue chemiluminescence of festering wounds tissue homogenates were examined before and after the treatment. To assess the free radical oxidation in vitro, spontaneous and zymosan-induced whole blood chemiluminescence measurement, iron-induced chemiluminescence assessment of festering wounds tissue homogenates were performed. The distribution of chemiluminescence parameters compared to normal expected distribution was analyzed to group homogeneity on these criteria.Results. Group of donors was homogeneous in composition that allowed the calculation of mean values. By changing in whole blood chemiluminescence of patients with soft tissue festering wounds, they were allocated to two groups, in which a marked increase or decline of the investigated parameters was seen. Increased luminol-dependent blood chemiluminescence indicates excessive free radicals generation by phagocytes and is characteristic of acute inflammation. Decreased intensity of chemiluminescence was observed in the blood of patients who showed reduced functional activity of phagocytes, which, together with the clinical features indicate a long-term smoldering inflammation. The comparative assessment of «Poliderm», «Voskopran», «Polysorb», «Levomekol» medications, used for local treatment of suppurative wounds, influence on free radical oxidation in model systems in vitro, was performed.Conclusion. There is a triple increase in chemiluminescence intensity in the acute phase of the inflammatory process, marking increased production of reactive oxygen radicals with microbicide activity); in long-term smoldering processes, chemiluminescence decreases by half, indicating reduced efficiency of protective mechanisms


Author(s):  
D Wickens ◽  
M H Wilkins ◽  
J Lunec ◽  
G Ball ◽  
T L Dormandy

Using recently developed methods for measuring free-radical oxidation products in biological material, plasma extracts were studied in 24 women in the first two trimesters of pregnancy, in 124 women in the third trimester of pregnancy, in 20 women with pre-eclamptic toxaemia (PET), and in a control group. There was a significant progressive rise of two groups of free-radical oxidation products throughout pregnancy and a significantly greater rise in PET. In women whose diastolic blood pressure rose to above 70 mmHg there was a highly significant relation between two groups of free-radical reaction products and blood pressure.


2021 ◽  
Vol 11 (3) ◽  
pp. 12-17
Author(s):  
A. V. Elikov

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.


Author(s):  
Н.А. Терехина ◽  
А.Д. Селин ◽  
Г.А. Терехин

Цель исследования - изучение влияния электромагнитного излучения дециметрового диапазона на показатели антиоксидантной защиты в эритроцитах и плазме крови крыс. Методика. Эксперименты выполнены на крысах находившихся под влиянием электромагнитного поля дециметрового диапазона в течение 3-х мес. Проведен хемилюминесцентный анализ эритроцитов и плазмы крови животных. Интенсивность свободно радикального окисления в эритроцитах и плазме крови оценивали по показателям: максимальной интенсивности хемилюминесценции (Imax); светосуммы (S); светосуммы после максимального значения хемилюминесценции S(imax); коэффициентам Zlmax и Dec. Спектрофотометрически определяли содержание восстановленного глутатиона в эритроцитах. В плазме крови определяли содержание церулоплазмина, меди и железа. Анализ этих показателей был проведен в динамике исследования через 30, 60 и 90 сут. Результаты. Длительное (в течение 3 мес) нахождение животных в условиях действия электромагнитного поля приводит к изменениям показателей хемилюминесценции эритроцитов. Изменение показателей Imaх, S, Simax свидетельствует о нарушении процессов свободнорадикального окисления. В эритроцитах периферической крови крыс при этом установлено повышение содержания глутатиона. В плазме крови выявлено увеличение концентрации церулоплазмина и меди, снижение содержания железа. Заключение. Длительное нахождение животных в условиях действия электромагнитного поля приводит к нарушению равновесия в прооксидантно-антиоксидантной системе в эритроцитах. Антиоксиданты глутатион и церулоплазмин являются мишенью для действия электромагнитного излучения дециметрового диапазона. Установлено влияние длительного электромагнитного излучения на показатели минерального обмена: снижение содержания железа и увеличение содержания меди в плазме крови. The aim of the research was to study the effect of decimeter-range electromagnetic radiation on indexes of antioxidant defense in rat erythrocytes and blood plasma. Methods. Experiments were performed on rats exposed to decimeter-range electromagnetic field for three mos. Chemiluminescent analysis of erythrocytes and blood plasma was performed. Intensity of free-radical oxidation in erythrocytes and plasma was evaluated by parameters of maximum chemiluminescence intensity (Imax), light sum (S), the light sum after the maximum chemiluminescence value (imax), and ZImax and Dec coefficients. The content of reduced glutathione in peripheral blood erythrocytes and the plasma contents of ceruloplasmin, iron and copper were measured spectrophotometrically at 30, 60, and 90 days. Results. A long-term exposure of animals to the electromagnetic field for 3 mos. led to changes in chemiluminescent parameters of erythrocytes. The changes in Imax, S, and Simax indicated impairment of free-radical oxidation processes. The content of glutathione was increased in peripheral blood erythrocytes. The plasma contents of ceruloplasmin and copper were increased whereas the content of iron was decreased. Conclusion. The long-term exposure of animals to the electromagnetic field results in an imbalance of the erythrocyte pro-/antioxidant system. The antioxidants glutathione and ceruloplasmin are targets for the decimeter-range electromagnetic radiation. The study demonstrated the effect of long-term electromagnetic radiation on indexes of mineral metabolism evident as a decrease in the content of iron and an increase in the content of copper in the blood plasma.


2019 ◽  
Vol 100 (3) ◽  
pp. 439-444
Author(s):  
S E Lorents ◽  
E N Mazko ◽  
O G Makarova ◽  
A Yu Zharikov ◽  
Yu V Korenovskiy ◽  
...  

Aim. To determine the effect of Leu-Ile-Lys tripeptide on indicators of oxidative stress and expression of cyclooxygenase-1 and -2 in the gastric mucosa on the background of experimental indomethacin-induced ulcer. Methods. Experiments were performed on 35 male Wistar rats with a body mass of 200-250 g aged 2-3 months that were divided into 3 groups: the control group (intact rats, 8 animals), control group (simulation of indomethacin-induced gastropathy, 12 animals) experimental group (simulation of indomethacin-induced gastropathy + administration of Leu-Ile-Lys tripeptide, 15 animals). The tripeptide Leu-Ile-Lys obtained by chemical synthesis (sample purity at least 98%) was administered intragastrically daily for 7 days before the simulation of indomethacin-induced damage of the gastric mucosa in a dose of 11.5 mg/kg. The model of indomethacin-induced damage to the rodent gastric mucosa was reproduced by a single intragastric administration of indomethacin in a dose of 60 mg/kg in 1 ml of saline. In the stomach homogenate the activity of free radical oxidation was determined by conventional methods. For quantitative determination of cyclooxygenase-1, -2 in gastric homogenate the method of enzyme immunoassay was used. The concentration was determined spectrometrically by the color intensity of the samples. Results. With a prophylactic administration of tripeptide Leu-Ile-Lys, concentration of tiobarbiturate-reactive products was normalized, total antioxidant activity increased and the activity of antioxidant enzymes decreased compared to the control group. The concentration of cyclooxygenase-2 in gastric homogenate from the experimental animals was 2.3 times lower than that of the control rats. Conclusion. Use of Leu-Ile-Lys tripeptide in experimental indomethacin-induced gastric ulcer showed a significant decrease of oxidative damage and inflammation in the gastric mucosa.


Author(s):  
O. V. Dzhyhaliuk ◽  
H. I. Stepaniuk ◽  
N. V. Zaichko ◽  
S. I. Kovalenko ◽  
K. P. Shabelnyk

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.


Author(s):  
M. I. Maruschak ◽  
M. M. Khudobyak ◽  
I. Ya. Krynytska ◽  
I. V. Antonyshyn

Background. The injured with polytrauma are classified as extremely severe patients, as their emergency care and intensive care is followed by significant difficulties, frequent development of complications, high mortality and survivors disability.Objective. This study is aimed to evaluate the effect of lipid peroxidation in heart, lungs, liver and blood of rats in early and late periods of combined traumatic injury of chest and hips and to establish their influence on the development of multiple organ failure.Methods. The study was conducted on 70 adult male white nonlinear rats. It was determined the content of lipid hydroperoxides and concentration of TBA-active products in erythrocyte mass, heart, lungs and liver.Results. The data prove activation of free radical oxidation at the first day of post-traumatic period. Analysis of the data evidences the increase in of lipid hydroperoxides (HPL) rate in liver homogenate in group E1 in 1.5 times, in all subsequent periods of the research the increase in rate fluctuated within 1.9-2.0 times. In blood and heart the HPL rate increased twice in group E1, reached maximum in group E2 and gradually decreased till the end of the experiment, data exceeded the control group. The highest level of HPL was determined in lung tissues (r≤0.01). In the post traumatic period the highest TBA-AP was detected in lungs and liver.Conclusions. In case of simulated trauma (injury of chest with fractures of both hips) hyperactivation processes of free radical oxidation is observed in 1 day, reaching a peak in 7-14 days of post-traumatic period in blood, tissues, liver, heart and lungs if compared to the control group causing multiple organ failure.


2010 ◽  
Vol 9 (1) ◽  
pp. 17-20 ◽  
Author(s):  
O. V. Azarova ◽  
V. M. Bryukhanov ◽  
V. P. Bulgakov ◽  
Ya. F. Zverev ◽  
V. V. Lampatov ◽  
...  

On long-term introduction to rats in dosage 100 mg/kg polyphenol complexes from heartwood and callus culture of Maackia amurensis Rupr. et Maxim. had a marked influence on the activity of free radical oxidation. Under conditions of induced oxidant stress both polyphenol complexes inhibited prooxidant activity directly affecting the products of free radical oxidation. Inhibiting influence on the production of oxygen active forms that is characteristic for both phytocomplexes is determined by inhibition of mechanisms both enzymatic and non-enzymatic defense.


2019 ◽  
Vol 72 (4) ◽  
pp. 539-542
Author(s):  
Viktoriia A. Pinchuk ◽  
Galyna Ya. Sylenko ◽  
Yurii I. Sylenko ◽  
Angelina M. Kryvchun ◽  
Tetiana V. Pilugina

Introduction: In recent years in Ukraine, as in the entire world, there has been an increase in cases of domestic injuries with a raise in the number of patients with craniocerebral trauma and its consequences. The aim of our research was to study clinical symptoms, the state of free radical oxidation, aggregate and hemocoagulative properties of blood in patients with mild craniocerebral trauma. Materials and methods: We conducted comprehensive clinical and laboratory examination of 34 patients with mild craniocerebral trauma and 20 apparently healthy patients (the control group). The diagnosis was made under ICD-10. The verification of the diagnosis was based on data from clinical examination, neurological status of neuroimaging (computer tomography and magnetic resonance imaging). The study group included 24 men and 10 women aged from 19 to 40. In addition, 20 apparently healthy individuals of the same age were examined, who comprised the control group (14 men and 6 women). In the blood parameters of all patients, we examined free radical oxidation, hemostasis and aggregation properties of platelets. Results: The conducted study revealed clinical disturbances, changes in the parameters of free radical lipid oxidation, coagulation and microcirculatory hemostasis. Conclusions: All patients with mild craniocerebral trauma, develop disturbances in the form of symptoms of microorganic lesion of the central nervous system: convergence weakness in 100% of patients, Mann’s symptom (76.4%), disruption of the function of the cranial nerves (58.8%), signs of pyramidal insufficiency (68.4%), vestibular disorders (94.1%), autonomic vascular dysfunction (100%). Mild craniocerebral trauma is accompanied by the activation of free radical lipid oxidation processes, decreased activity of antioxidant enzymes, hypercoagulation, and increased aggregation properties of platelets.


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