Lipid Peroxidation Antioxidant Defense Research Articles

Correlation between the Chemiluminescent Activity of Neutrophilic Granulocytes and the Lipid Peroxidation-Antioxidant Defense System in Gastric Cancer Associated with Helicobacter pylori Infection.

To study the processes of lipid peroxidation and the activity of antioxidant defense enzymes depending on the chemiluminescent activity of neutrophilic granulocytes in patients with gastric cancer associated with H. pylori infection, depending on the stage. A total of 39 patients with stage I-II gastric cancer and 30 patients with stage III-IV gastric cancer were examined. A study of the chemiluminescent activity of neutrophilic granulocytes was carried out and the parameters of the lipid peroxidation system and antioxidant protection in plasma were determined using the spectrophotometric method. Statistical data processing was performed using the Statistica 7.0 software package (StatSoft, St Tulsa, OK, USA). In patients with gastric cancer associated with H. pylori infection, regardless of stage, the proportion of neutrophilic granulocytes with normal activity did not exceed 1/3 of the total number of patients, and the remaining 2/3 of patients had altered chemiluminescent activity of neutrophilic granulocytes. In patients with gastric cancer, by I-II stage of the disease, the majority revealed a reduced function of neutrophilic granulocytes, and in patients with gastric cancer in stage III-IV of the disease, the majority showed increased chemiluminescent activity of neutrophilic granulocytes. In all patients with gastric cancer associated with H. pylori infection, regardless of the stage of the disease, an increase in lipid peroxidation processes with activation of antioxidant defense enzymes was detected. At the same time, there were no statistically significant differences between the indicators of the system lipid peroxidation-antioxidant protection depending on the stage of gastric cancer and the chemiluminescent activity of neutrophilic granulocytes, which likely indicates that all reactive oxygen species produced by neutrophilic granulocytes in the respiratory burst are consumed locally, minimally affecting the development of oxidative stress in the blood plasma.

Integral assessment of non-specific lipid peroxidation reactions blood in adolescent girls of the Siberian ethnos

BACKGROUND: Integral parameters, in particular, the oxidative stress coefficient are informative and can be used both for evaluation of pathological conditions and compensatory-adaptive reactions of the organism.
 AIM: To investigate an integral coefficient the activity of nonspecific reactions of lipid peroxidation in adolescent girls of the Buryat, Evenki and Tofalar ethnic groups, as compared to the non-indigenous ethnic groups, by applying.
 METHODS: Total 190 adolescent girls (Buryats, Evenki and Tofalar, and nonindigenous population (for example of Russians)) living in the Irkutsk region were the objects of research. The survey was carried out in expeditionary conditions, in the territories of compact residence of ethnic groups. To calculate the integral coefficient (oxidative stress coefficient), spectrophotometry and fluorometry methods we implemented. The individual indicators: primary, secondary, and final products of lipid peroxidation as well as antioxidant defense components were measured.
 RESULTS: According to the obtained data, a lower content of diene conjugates (DC) (p 0.0001), ketodienes and conjugated trienes (KD and СT) (p=0.0003), -tocopherol (p 0.0001) with elevated levels of TBA-active products (p=0.0074) and superoxide dismutase activity (p=0.0008) in the Buryat ethnic girls group relative to similar parameters of girls in the non-ingenious population was observed. Girls of Tofalar ethnic group had higher values of DC (p=0.0009), with reduced values of KD and CT (p=0.0044) compared to the non-indigenous population. There were no differences among girls of the Evenk ethnic group relative to Russians. An integrative analysis of the state of nonspecific lipid peroxidation reactions using the coefficient showed no significant differences between the studied groups.
 CONCLUSION: The conducted study demonstrates certain changes in the lipid peroxidationantioxidant defence system, in the absence of changes in the total indicator among girls representing Siberian ethnic groups and the Russian population living next to them, which can be the basis for subsequent monitoring of their health status.

Peripheral and regional blood bloodstreams lipid peroxidation comparative analysis in women with pelvic venous disorder.

Pelvic venous disorder (PVD) in women is a polyetiological multifactorial disease characterized by a high prevalence (up to 80%), a high risk of infertility, and a progressive recurrent course. Morphological changes of the venous bed occur in PVD, contributing to retrograde blood flow and pelvic phlebohypertension. It is occur due to dynamic hypervolemia and hypertension long-term exposure on the venous wall. However, PVD pathogenesis analysis only from venous hemodynamic disorders position does not explain all mechanisms of the disease development and does not contribute to the treatment measures effectiveness. Currently oxidative stress reactions are considered as the most important markers of the pathological process. The aim of our work was a comparative analysis of lipid peroxidation-antioxidant defense component changes in the peripheral and regional blood flow in women with primary pelvic venous disorder depending on the disease stage. The study involved 137 women of reproductive age (mean age 37.4±9.1 years old) with diagnosed primary PVD divided into 3 groups according to the pathological process stages (stages I, II, III). Data from 30 practically healthy women (mean age 33.5±6.3 years old) were used as controls. Spectrophotometric, fluorometric, immunoassay and statistical methods were used. In patients with PVD stage I in peripheral bloodstream were higher values of SOD and GPO activity; in the regional bloodstream were higher levels of TBARs, SOD, catalase, GPO and lower GSH. In PVD stage II the peripheral bloodstream showed elevated levels of DC, GSH and SOD reduced levels; the regional bloodstream showed higher levels of DC, TBARs, GPO and GSH reduced levels relative to controls. PVD stage III was characterized by: higher levels of DC and TBARs and lower levels of SOD and GSH in the peripheral bloodstream; higher levels of DC, TBARs and lower levels of GSH and catalase in the regional bloodstream compared with control. Thus, the results of our study showed no significant differences in the LPO-AOD system between peripheral and regional bloodstreams in patients with PVD depending on the disease stage. However, negative changes in the redox balance in the regional bloodstream were earlier and were already registered at the first stage of the disease. It is likely that control of antioxidant insufficiency in patients with PVD should be an important component of preventive measures in the early stages and pathogenetic treatment in the pathological process progression, particularly in stage III of the disease.

Biochemical Status of Obese Male Adolescents of Different Ethnicity: Discriminant Analysis in the Identification of the Most Informative Indicators.

Parameters of the lipid metabolism and lipid peroxidation-antioxidant defense system in male adolescents with obesity, representatives of European and Mongoloid ethnicity were evaluated. Discriminant analysis revealed the most informative biochemical parameters for obese male adolescents: glutathione-S-transferase, VLDL cholesterol, glutathione peroxidase, reduced glutathione, and SOD activity for obese male Caucasian adolescents and glutathione-S-transferase, VLDL cholesterol, α-tocopherol, and glutathione peroxidase for Mongoloids obese male adolescents. The use of discriminant analysis allows implementing a differentiated ethnicity-oriented approach to prescribing antioxidant drugs in the complex therapy of obesity.

Dynamics of cellular factors of innate immunity and antioxidant protection in the patients with chronic recurrent vulvovaginal candidosis upon exposure to cavitated physiological solution

Dysfunction of colonization resistance factors at the mucous membranes of genitourinary system during adhesion of Candida fungi is a common pathogenic situation leading to impairment of the mucous membrane regeneration, unsuccessful attempts at in vitro fertilization (IVF), increased risk of complications during gestation. The aim of present study was to substantiate the opportunity of complex therapy for chronic vulvovaginal candidiasis using cavitated saline and usage suppositories with alpha-2b human recombinant interferon a (Viferon LLC, Russia). The study involved 90 women at the age of25.45±7.16 years, with clinically and laboratory confirmed recurrencies of chronic vulvovaginal candidiasis observed, on average, 5.55±0.45 times. Group 1 consisted of 30 women with C. albicans infection of urogenital tract, at the mean age of 27.11±1.52 years, who received therapy with fluconazole (150 mg once every 7 days). Group 2 consisted of 30 women with C. albicans infection of mucous membranes, mean age 27.31±1.99 years, treated with Fluconazole (150 mg 1 time in 7 days, and 5-min. irrigation of vagina with ultrasonicated saline solution, 7 days; Low-intensity ultrasound exposure was performed using the Fotek AK100-25 hardware complex, ultrasonic vibration frequency of 25 kHz (Yekaterinburg, Russia). Group 3 consisted of 30 women whose treatment included Fluconazole (150 mg once every 6 days), irrigation of mucous membranes with ultrasonicated cavitated solution and subsequent administration of suppositories containing Viferon® 500,000 IU (1 suppository daily for 7 days). Biochemical studies included determination of isopropanol- and heptane-soluble primary, secondary end products of lipid peroxidation. Activity of the antioxidant system was studied by determination of superoxide dismutase, glutathione peroxidase, ceruloplasmin, vitamin C. Qualitative and quantitative characteristics of neutrophilic granulocytes from vaginal secretions were evaluated by testing phagocytic activity, reduction of nitroblue tetrazolium compound to diformazan. The studies of IL-8, TNFα, IL-2, and IL-10 cytokines were carried out in cell-free supernates of vaginal secretions by ELISA test systems (LLC “Vector Best”, Novosibirsk). Results: upon therapeutic exposure to low-frequency ultrasonic cavitation combined with antioxidant drug, we have observed a decreased local concentration of pro-inflammatory cytokines, the balance of lipid peroxidationantioxidant defense system was restored, and functional metabolic status of the phagocytes in vaginal secretions was normalized.

Relationship between lipid metabolism state, lipid peroxidation and antioxidant defense system in girls with constitutional obesity

The study of the molecular mechanisms involved in adolescent obesity formation is important due to the severe and prolonged complications in adulthood. Here, we analyzed the lipid metabolism and peroxidation systems and the relationships between them in girls with constitutional obesity. Thirty-nine adolescent girls 14–16 age with constitutional obesity and twenty-six girls with a normal body mass index (control group) of the same age were examined. Spectrophotometric and fluorometric research methods were used. Constitutional obesity in adolescent girls is accompanied by the development of dyslipidemia (increased concentrations of total cholesterol, triacylglycerols, and very-low-density lipoproteins), as well as by reduced antioxidant defense components (total antioxidant activity, retinol, and the oxidized form of glutathione). In addition, adolescent girls with constitutional obesity had an increased number of correlations in the lipid peroxidation–antioxidant defense system and intersystem correlations, which indicates the insufficient activity of the antioxidant defense system. These results increase our understanding of the pathogenic mechanisms involved in adolescent.

Lipid Peroxidation-antioxidant Defense System Functional State in Adolescents with Arterial Hypertension and Dental Caries Comorbidity

Lipid Peroxidation-antioxidant Defense System Functional State in Adolescents with Arterial Hypertension and Dental Caries Comorbidity

Metabolic Changes in Newborns and Women Who Consumed Small Doses of Alcohol in the Prenatal Period

Introduction: Ethyl alcohol and its metabolites even in low concentrations negatively affectsan embryo and a fetus.Interest to the role of the lipid peroxidation-antioxidant defense (LPO-AOD) system has significantly increased in recent years, because this system imbalanceleads to the development of oxidative stress (OS), which is accompanied by body's resistance decreaseto the adverse environmental and internal factors negative influence, which is one of the most important triggers of so-called free radical pathology.
 Aim: The aim of research was to determine the concentration and activity of the metabolic system components “lipid peroxidation-antioxidant defense” (LPO-AOD) and the glutathione system components in pregnant women who consumed no more than 2 doses of low-strength alcoholic beverages (beer, champagne, wine) during the first half of pregnancy and their newborns.
 Methods: The design of the study was prospective and controlled randomized. The study involved 170 pregnant women who were observed in the regional perinatal center of Irkutsk. Two women refused to participate in the study. The main group consisted of 93 women who drank low alcohol beverages (beer, champagne and wine) in the first half of pregnancy (for a period of 7-20 weeks of pregnancy). The control group composed of 75 women who did not drink alcohol throughout their pregnancy. In both groups of women for a period of 30-32 weeks of pregnancy, the parameters of the LPO-AOD and glutathione systems had been determined. Similarly, cord blood had been sampled in 66 control group newborns and 53 newborns whose mothers drank alcohol in the first half of pregnancy (main group). Statistical processing of the research results was performed. Statistical processing of the results obtained had been carried out using the software package STATICTICA 10 Stat Soft Inc, USA (license holder - Scientific Centre for Family Health and Human Reproduction Problems) using the T - student and Mann-Whitney test methods.
 Results: The study revealed the influence of the use of low alcohol beverages (beer, champagne and wine) in an amount of no more than 2 doses on the state of the LPO-AOD and glutathione systems in the blood serum and red blood cells of pregnant women and their newborns. It was found that even a single intake of low alcohol beverages is accompanied byoxidative stress development in women and their newborns. The state of the glutathione system in pregnant women is characterized by a decrease in the content of reduced glutathione (GSH) and glutathione reductase (GR) activity with an increase in the oxidized glutathione (GSSG) and glutathione-S-transferase (GST) levels. In newborns, a decrease in GSH is associated with a decrease in the of GR, GST, and glutathione peroxidase (GPO) activity.
 Conclusion: Analyzing the data, in distant perspective the negative role of even small doses of low alcohol (beer, champagne and wine) on pregnant women and their newborns metabolism was established.

Lipid peroxidation, antioxidant defense parameters, and dynamics of surgical treatment in men with mechanical jaundice of various origins

Mechanical jaundice is a severe pathological condition caused by obstruction of the bile duct, usually requiring surgical intervention. Mechanical jaundice occurs in 45–50% of all cases of jaundice of all types, and may be of either non-tumor or tumor origin. Due to involvement of oxidative stress reactions in mechanical jaundice pathogenesis, it is relevant to study the parameters of this process. This study assesses lipid peroxidation-antioxidant defense components in men with mechanical jaundice of non-tumor and tumor origin in the context of surgical treatment. This study examined 47 men with mechanical jaundice of non-tumor origin (MJNT) and 45 men with mechanical jaundice of tumor origin (MJT) (stages I-II of the tumor process). Data from 100 healthy men served as the control. High activity of lipid peroxidation accompanied by falling concentrations of antioxidant enzymes were observed in men with MJNT. Increased primary and final lipid peroxidation products and decreases in almost all studied components of the antioxidant defense system (superoxide dismutase, glutathioneS-transferase, glutathione peroxidase, and ceruloplasmin) were observed. Similar observations emerged for patients with MJT, but with greater changes in parameters. The only indicator of difference between the groups was ceruloplasmin, with lower values in the MJT group. The MJNT group showed decreased thiobarbituric acid reactant values, catalase and ceruloplasmin both values were increased post-surgery. The post-surgery MJT group showed decreased conjugated dienes values and increased catalase and ceruloplasmin values. Thus, in MJNT patients, changes in the lipid peroxidation system relate to the stage of final products, which may serve as a favorable sign, in contrast to the MJT group, where changes concern only the stage of primary products. Based on the data obtained, antioxidant drugs are advised for patients with mechanical jaundice, with special attention given to the tumor origin of the disease.

Evaluation of the lipid peroxidation reactions activity in middle-aged men with chronic gastritis on the background of H. pylori infection

Background: There is not enough information about the course of the processes of lipid peroxidation-antioxidant defense in middle-aged men who are at risk of developing gastric cancer on the Correa cascade.
 Aims: To analyze of the processes of lipid peroxidation activity and antioxidant defense in men with chronic gastritis and chronic atrophic gastritis in combination with and without the presence of Helicobacter pylori.
 Materials and methods: 173 middle-aged men with an established diagnosis of chronic gastritis were examined, which were divided into 4 groups: group 1 ― patients with chronic gastritis without H. pylori (n=58), group 2 ― patients with chronic gastritis in combination with H. pylori (n=61), group 3 ― patients with chronic atrophic gastritis without H. pylori (n=28), group 4 ― patients with chronic atrophic gastritis in combination with H. pylori (n=26). Evaluation of the content of parameters of the lipid peroxidation system and the antioxidant components activity using spectrophotometric research methods was carried out. For statistical analysis, the software package Statistica 7.0 (Stat Soft, USA) was used. The study was conducted during 20132015.
 Results: Infection H. pylori with chronic and chronic atrophic gastritis accompanied by significant changes in the system of lipid peroxidation, and antioxidant defense components in the form of primary and accumulation of end products, insufficient activity of antioxidant enzymes ― superoxide dismutase, catalase, glutathione peroxidase, glutathione-S-transferase and reducing content of reduced glutathione. The use of an integrating factor to assess the severity of prooxidant activity confirms the development of antioxidant deficiency in patients of these groups.
 Conclusions: In patients with chronic and chronic atrophic gastritis, combined with H. Pylori infection, a more pronounced progression of oxidative stress reactions and a significant lack of antioxidant factors were found in comparison with patients with these forms of gastritis without H. pylori.

Comparison of Reactivity of the Lipid Peroxidation-Antioxidant Defense System in Normal and Hypertensive Rats at Different Stages of Stress-Reaction.

We compared changes in the parameters of LPO-antioxidant defense system at various stages of the stress response in mature male ISIAH rats (hereditary stress-induced arterial hypertension) and WAG rats in 3 h (stage of anxiety) and 7 days (resistance stage) after a 3-h single immobilization in the supine position. It was found that post-stress reactivity of the nonspecific stress-limiting LPO system is different in normotensive and hypertensive rats. ISIAH rats, irrespective of the stage of the stress-reaction, demonstrated more intense LPO reactions (accumulation of TBA-reactive products) and reduced antioxidant defense parameters (low content of lipid-soluble vitamins, increased oxidized glutathione content) in comparison with the corresponding parameters in WAG rats.

Evaluation of Lipid Peroxidation-Antioxidant Defense System Depending on the Stage of Stress Reaction in Hypertensive ISIAH Rats.

The stages of stress reaction (anxiety and resistance) were reproduced on the model of stresssensitive hypertensive ISIAH rats. Analysis of the experimental data showed an increase in activity of the antioxidant defense system in ISIAH rats: total antioxidant activity of the blood and superoxide dismutase activity increased at the stage of anxiety and then decreased during the resistance stage.

Redox status parameters in adolescent-mongoloids with exogenously constitutional obesity and fatty hepatosis

It is assumed that in the progression of obesity, complicated by fatty hepatosis in adolescents, a significant role is given to the reactions of oxidative stress with deficiency of antioxidant factors. However, an important factor that remains outside the field of view of researchers is the ethnicity of the patient, which is an important element in the development of a personalized approach in the treatment and prevention of diseases. In connection with this, the purpose of this study was to study the changes in the lipid peroxidation-antioxidant defense processes in adolescent Mongoloids with exogenously constitutional obesity complicated by fatty hepatosis. 18 adolescent boys with fatty hepatosis were examined on the background of exogenous-constitutional obesity of the first degree; 38 adolescent boys with exogenously constitutional obesity without changes in the liver and 37 practically healthy adolescents (control group). All subjects surveyed for ethnicity belonged to the Mongoloids. Spectrophotometric and fluorometric methods were used in the research. The results of the study indicated a high intensity of lipid peroxidation reactions in Mongoloid boys with obesity and fatty hepatosis relative to control values: an increase in blood plasma content of compounds with unsaturated double bonds (p<0.001), diene conjugates (p=0.0012), ketodienes and conjugated trienes (p<0.0001), in the absence of significant differences in the level of TBA-active products. Increased values of total antioxidant activity in blood plasma (p=0.0023) and erythrocyte superoxide dismutase activity (p=0.0072), decreased levels of fat-soluble vitamins in blood plasma [α-tocopherol (p<0.0001) and retinol (p=0.0011)] and oxidized form of glutathione in erythrocytes (p=0.0083) have been found. The pronounced insufficiency of fatsoluble vitamins - α-tocopherol and retinol in patients of the main group was also noted in comparison with patients without morphological changes in the liver. Thus, in teenage Mongoloids with exogenously constitutional obesity and fatty hepatosis, it is possible to recommend antioxidant drugs in addition to basic metabolic therapy.

Hepatospecific signs of disorders in the free radical oxidation-antioxidation defense system in rats with diabetes mellitus aggravated by cerebral ischemia-reperfusion

Cerebral hypoxia results in considerable pathological-histological changes in the internal organs with disorders of their functional state. In case of diabetes mellitus metabolic disorders cause liver damage as well, therefore diabetes aggravated by cerebral ischemia-reperfusion should logically make morphofunctional changes in this organ worse.Objective of the study: to examine the signs of oxidative and nitrosative stress in the liver of rats with diabetes mellitus aggravated by cerebral ischemia-reperfusion.Material and methods. The content of the products of lipid peroxide oxidation, oxidative protein modification, metabolites of nitrogen oxide and activity of antioxidant enzymes were investigated in the liver homogenates of rats. Diabetes mellitus was simulated by means of a single intraperitoneal injection of streptozotocin (Sigma, USA, 60 mg/kg). The results were assessed after 20-minute carotid ischemia with one hour reperfusion and on the 12th day of post-ischemic period. Results. According to the changes in the content of lipid peroxidation products and activity of antioxidant enzymes 20-minute carotid ischemia with one hour reperfusion results in the depression in the lipoperoxidation-antioxidation defense system. On the 12th day of the experiment the content of diene conjugates in this organ increases against the background of an increased activity of superoxide dismutase and glutathione peroxidase which, in general, is indicative of a compensatory character of the reaction of the lipid peroxidation-antioxidant defense system. The indices of oxidation protein modification and nitrogen oxide metabolism during the early post-ischemic period remain without changes in the liver of animals from this group, and they increase on the 12th day of the experiment, which is indicative of the availability of oxidative and nitrosative stress during this period. In the liver of animals with diabetes mellitus the reaction of all the mentioned indices is absent both during early and late post-ischemic periods. Conclusion. The lack of the signs of lipid peroxidation, protein oxidative modification, nitrogen oxide metabolism and activity of antioxidant defense in the liver of animals with diabetes mellitus both during early and late post-ischemic periods is indicative of areactivity of these biochemical indices concerning cerebral ischemia-reperfusion.

СОСТОЯНИЕ ПРОЦЕССОВ ПЕРЕКИСНОГО ОКИСЛЕНИЯ ЛИПИДОВ И АНТИОКСИДАНТНОЙ ЗАЩИТЫ У МУЖЧИН БОЛЬНЫХ САХАРНЫМ ДИАБЕТОМ 1-ГО ТИПА

The aim of study is to assess lipid peroxidation and antioxidant system in men with diabetes mellitus type 1. The objective of this study was to identify features of the lipid peroxidation-antioxidant defense system in men of reproductive age with diabetes mellitus type 1. 22 men with diabetes mellitus type 1 (the average age of 27.1 ± 7.38years) and30 healthy men of the same age (control group) (the average age of 28.0 ± 4.3 years) were involved in the study. The main and control groups were formed on the principle of copy - pair. Standard clinical examination methods were used: history taking, physical examination and consultation of specialists to identify complications of diabetes. To determine the indicators of the system of free-radical lipid oxidation and activity of antioxidant protection, the spectrophotometric and fluorometric methods were used. In men with diabetes mellitus 1 type, there is increase in the level of active products reacting with thiobarbituric acid compared to the same indicator in the control group. The level of antioxidant protection in men with diabetes mellitus 1 type unlike the control was characterized by decrease in total antioxidant activity. However, stability of processes of superoxide dismutase activity and the glutathione system in comparison with control is observed against the backdrop of intensity increase of oxidative processes. Activation of lipid peroxidation is observed in men with diabetes mellitus type 1.

170 - Evaluation of Lipid Peroxidation System in Primary School Children with Different Inter-Hemispheric Asymmetry Types

Background It has been shown that people with signs of dominance of the right hemisphere exhibit high degree of adaptation to the factors met in the course of evolution. However, in the information stress conditions greater stability for stress test exhibit patients with functional activity of the left hemisphere, which mostly explaining by localization and functional activity of certain brain structures. The aim of this study was to: examine the state of lipid peroxidation-antioxidant defense (LPO-AOD) in children with different types of inter-hemispheric asymmetry. Methods Following groups of children formed: with a predominance of the functional activity of the left hemisphere (n=45) and with a predominance of the functional activity of the right hemisphere (n=33). All children were practically healthy (had no chronic and mental illness), intellectually save and enrolled in the same curriculum. Psychophysiological, neurophysiological, spectrophoto- and fluorometric, statistical methods used. Results Significantly higher values of one of the indicator of lipid peroxidation primary products - diene conjugates (DC) (1.54±0.09 μmol/l) revealed in children with a predominance of functional activity of the left hemisphere in comparison with children with right hemisphere (0.80±0.05 μmol/l) (p 0.05). The correlation analysis showed the presence of significant relationships between system components LPO-AOD in group of healthy children with left hemisphere predominance: DC-α-tocopherol (r=0.71), DC-superoxide dismutase activity (r=0.91), DC-retinol (r=0.91). In the group of children with a predominance of the right hemisphere no significant correlations were observed. Conclusion In children with a predominance of functional activity of the left hemisphere in comparison with children with right hemisphere increased activity of lipid peroxidation is accompanied by corresponding activation of antioxidant components that may causes greater stability of metabolic processes. This factor must be taken in receiving antioxidant drugs.

Gender Features of Radical Oxidation of Lipids in Menopausal Women and Men in Andropause

Our aim was to assess lipid peroxidation ― antioxidant protection in menopausal women and men in andropause and to compare these processes in different gender and age groups. 74 women and 37 men were examined. This study was a prospective, randomized cohort study. Women were divided into perimenopausal group (n=22, mean age 49.03±3.13), postmenopausal group (n=15, mean age 54.43±4.54) and control (n=37, mean age 34±1.2). Men were divided into a group of andropause (n=20, mean age 50.38±2.63) and control (n=17, mean age 35.21±4.75). Body mass index in the main and control groups was comparable. Questionnaires, clinical examination, assessment of the lipid peroxidation-antioxidant defense system, and the calculation of oxidative stress ratio were conducted to all participants of the study. In women from the reproductive phase transition to its extinction increases content of compounds with conjugated double bonds by 22% (p<0.05) in perimenopause and by 27% (p<0.05) in postmenopause, increases content of the ketodienes and coupled trienes by 21% (p<0.05) in perimenopause relative to the control group and reduced by 27% (p<0.05) in postmenopausal women relative to the group of perimenopause. The antioxidant system in women observed the following changes: decrease in the α-tocopherol levels in postmenopausal women by 37% relative to control and by 22% (p<0.05) to compare perimenopause; reduction of retinol level by 29% (p<0.05) in the perimenopause and by 39% (p<0.05) in postmenopause relative to control, increasing of the content of GSSG by 18% (p<0.05) in postmenopause to compare control. When comparing groups of men statistically significant differences were not found. When comparing the groups according to gender, we revealed in men the increased content of compounds with conjugated double bonds by 38% (p<0.05), the GSSG by 13% (p<0.05), reduced content of the ketodienes and coupled trienes by 43% (p<0,05), α-tocopherol by 24% (p<0.05), SOD activity by 9% (p<0.05).Coefficient oxidative stress in perimenopausal women was 2,5, in postmenopausal ― 3,48, in andropause ― 0,97. Expressed lipid peroxidation activity is more physiological in andropause than in menopause. Men in andropause have large functional reserves and adaptive capacity than menopausal women.

Lipid Peroxidation State in Women of Reproductive Age with Acute Form of Viral Hepatitis

Objective: The objective of this study was to identify features of the lipid status and lipid peroxidation-antioxidant defense system in women of reproductive age with acute form of hepatitis. Methods: The study involved 36 women with acute viral hepatitis and 28 healthy women of the same age. Spectrophotometric and fluorometric methods were used. Results: In patients with acute viral hepatitis we detected an increase in triglycerides levels ― by 21% and very low density lipoprotein values — by 17% in relative to control group, high-density lipoprotein cholesterol content reduced by 38%. In group with acute viral hepatitis the TBA-reactive products level increased by 2.21 times and superoxide dismutase activity decreased by 1.43 times in comparison with control group. Conclusion: The acute form of hepatitis is characterized by series of metabolic disorders that require a more careful approach in therapeutic and diagnostic administration.

Reproductive Health and Peculiarities of Lipid Peroxidation-Antioxidant Defense System in Men of the Main Ethnic Groups of the Baikal Region.

Quality of sperm and some parameters of LPO reflecting primary and end stages of oxidation and levels of α-tocopherol and total antioxidant activity were studied in ejaculate samples from 130 men (mean age of 24 years) living in Ulan-Ude, Buryatia Republic. All participants took a part in survey and were examined by an andrologist. The observed peculiarities of LPO and antioxidant defense in Russian men, such as decreased level of substrate supply for the processes of LPO and α-tocopherol, attest to specificity of metabolic processes and development of compensatory reactions of the organism under physiological conditions. LPO processes were more active in Buryat men, which can indicate exposure of cell membranes to toxic oxygen species. However, the observed in these patients significant increase in α-tocopherol concentration reflects adequate functioning of the adaptive and protective mechanisms of the body.

Lipid Peroxidation-Antioxidant Defense System during Toxic Liver Damage and Its Correction with a Nanocomposite [corrected] Substance Containing Selenium and Arabinogalactan.

Experiments on rat model of toxic liver damage (CCl4, subcutaneously) have demonstrated that selenium nanopreparation on arabinogalactan matrix and partially arabinogalactan alone prevented the development of oxidative stress assessed by the balance of LPO and antioxidant defense processes.