scholarly journals Mechanisms of hepatic steatosis formation in adolescent boys with hypoandrogenism

2021 ◽  
pp. 79-83
Author(s):  
L.K. Parkhomenko ◽  
L.A. Strashok ◽  
S.I. Turchyna ◽  
Z.V. Yeloyeva ◽  
T.M. Klymenko ◽  
...  

There has been an increase the prevalence of andrological diseases in all age groups in recent decades, including those with comorbid conditions such as pathology of the cardiovascular system and liver, which are manifestations of metabolic syndrome.Research aim: to investigate the relationship between formation of hepatic steatosis and hypoandrogenism (HA) in adolescent boys.Materials and methods. The study involved 42 adolescent boys aged 14–18 years with laboratory confirmed HA in whom total testosterone levels were less than 12.0 nmol/l. Sex hormones, gonadotropins, insulin levels, biochemical parameters of liver function, the state of free radical oxidation and antioxidant protection were determined in patients. Based on ultrasound examination adolescents with HA were divided into 2 groups: group 1 – 15 adolescents with signs of liver steatosis; group 2 – 27 adolescents with normal ultrasound parameters of a liver. The control group consisted of 38 boys of the same age with normal indicators of physical and sexual development without signs of pathology of the hepatobiliary system. Results. Individual assessment of sexual development allowed to diagnose I degree of delayed sexual development in 44.7%, II degree in 38.3% and III degree in 17.0% of adolescents. HA negatively affects the physical development of most boys (78.7%), due to short stature (40.0%), weight deficiency (20.0%) and overweight (18.7%). Factor analysis allowed to build a factor model of hepatic steatosis formation in adolescents with delayed sexual development and HA, which describes 76.0% of the sample and consists of five factors. Conclusion. Atherogenic changes of the lipid profile, androgen deficiency, insulin resistance, activation of cytolytic processes in the liver and oxidative stress formation due to a decrease in the effectiveness of antioxidant protection are important in the pathogenesis of hepatic steatosis in boys with HA. A factor model of the hepatic steatosis development in adolescent boys with HA gives grounds for the development of therapeutic and preventive measures in adolescent boys with HA and comorbid liver pathology.

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.


2018 ◽  
Vol 20 (83) ◽  
pp. 204-207
Author(s):  
I.B. Kobilyukh

The enhancement of free radical oxidation, characteristic of inflammatory processes, is accompanied by a violation of the properties of biological membranes, the functioning of cells and damage to surrounding tissues. The purpose and task of the research was to make correction of antioxidant protection of the body of cows during the period of dry preparations containing nanoparticles of metals. To activate the antioxidant system of the body of cows during the dry period, use the vitamin complex «Nanovit». The experiment was conducted on cows of Ukrainian dairy black-and-white breed in Agroprodservice-Invest LLP of the Kozivsky District of the Ternopil Oblast. The experiment was conducted before 35–25 days to the calves birth where the experimental and control groups of cows were formed (n = 10). Cows of the experimental group for 35–25 days to the cattle, intramuscularly injected 5.0 ml vitamin complex «Nanovit» (composition: vitamins A, D, E and nanoparticles Cu, Zn, Mn, Co). Producer of «NVP» LLC «Ecological Capital». Cows of the control group for 35–25 days to the catheter, intramuscularly administered 15.0 ml of the drug Prodevit-tetra (1 ml of the preparation contains vitamin A – 50000 IU, vitamin D – 25000 IU, vitamin E – 20 mg, vitamin F – 6 mg). Manufacturer of Product Ltd. The study found that vitamins A, D, E, and nanoparticles Cu, Zn, Mn, Co, which are part of the drug «Nanovit», activate the antioxidant system of the body of cows during the dry period. So after the application of the drug «Nanovit» in the body of cows there was a decrease of 58.5% (Р ≤ 0.01) of diene conjugates and 95.0% (Р ≤ 0.001) of TBK-active products against the background of an increase of 20.0% (Р ≤ 0.01) activity of catalase. After the application of the drug «Nanovit», the service period of the period from cows decreased by 54 days, and the index of insemination decreased by 0.2 units against the cows fed «Prodevit-tetra», indicating a positive effect of the drug containing the nanoparticles of metals Cu, Zn, Mn, Co and vitamins A, D, E during the post-period period in cows.


2019 ◽  
Vol 21 (95) ◽  
pp. 98-101
Author(s):  
I. S. Varkholiak ◽  
B. V. Gutyj

The aim of this study was to investigate the effect of Bendamin on the antioxidant status of rats in experimental doxorubicin-induced cardiomyopathy. The studies were performed on white sexually mature young male of Vistar line rats weighing 180–200 g, which were kept on a standard diet of the Institute Vivarium of the State Research Institute of Veterinary Drugs and Feed Additives. Animals were divided into 3 groups of 6 animals in each: control group – intact animals; experimental group R1, in which animals were simulated with doxorubicin-induced cardiomyopathy by intraperitoneal administration of doxorubicin at a dose of 2.5 mg/kg 3 times a week for two weeks; experimental group R2, in which animals were injected with the drug “Bendamin” at a dose of 20 mg/kg after injection of doxorubicin. The data obtained indicate that the introduction into the experimental animals of the experimental group of doxorubicin is accompanied by intensification in the myocardium of the processes of free radical oxidation. The increase in diene conjugates was found to be 32.7% and TBK-active products increased by 37.6% compared to the control group of rats. Doxorubicin was also found to cause inhibition of the glutathione system of the animal's antioxidant protection after administration to rats. After administration of the drug “Bendamin”, rats of the second experimental group were suppressed with lipid peroxidation under the conditions of doxorubicin intoxication. In the rats of the second experimental group, the level of intermediates and end products is likely to decrease, so in the rat myocardial homogenate the level of diene conjugates decreased by 16.8% and the level of TBA-active products by 20.8% compared to the first experimental group. who had clinical signs of cardiomyopathy caused by doxorubicin administration. The use of the drug “Bendamin” in rats of the second experimental group contributed to the enhancement of the enzymatic and non-enzymatic element of the antioxidant system, protecting the structural and functional integrity of cell bioembranes. The results of the studies enrich the pharmacological characteristics of the drug “Bendamin”, indicate its sufficiently clear protective effect on the myocardium in experimental doxorubicin cardiomyopathy and is a convincing proof of the feasibility of the drug in veterinary practice.


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):  
I. A. Umnyagina ◽  
L. A. Strakhova ◽  
T. V. Blinova

Introduction. To date, age and sex differences have been established for many biochemical parameters. Gender differences in indicators for systems such as antioxidant, thiol-disulfide, oxidative stress and inflammation systems are absent or under study.The aim of the study was to identify gender differences in biochemical parameters reflecting the functioning of antioxidant systems of the body and free radical oxidation in workers of metallurgical production, in contact with harmful production factors.Materials and methods. The blood of men and women working at the metallurgical enterprise of the Nizhny Novgorod region (n=80) under the influence of a complex of physical and chemical production factors was studied. Total oxidative stress, total antioxidant capacity of serum, glutathione levels were studied by photometric biochemical methods. Levels of C-reactive protein and 8-hydroxy–2-deoxyguanosine were studied by ELISA.Results. The average amount of peroxides in the serum of women exceeded 1.6 times this figure in men. In the group of men, the content of 8-Ondg was higher by 26% (p=0.012), the level of GS-by 12% (p=0.019), the activity of SOD — by 1.5–2 times (p=0.0001), the level of CRP — by 2 times (p=0.008) compared to similar indicators in women.Conclusions. Studies of gender differences in workers under the influence of harmful production factors will allow more effective approach to the etiology, treatment and prognosis of production-related diseases. Indicators of oxidative stress and antioxidant protection can be indicators of the health of workers under the influence of harmful industrial factors and be important in the prevention of diseases associated with oxidative stress.


2009 ◽  
Vol 102 (12) ◽  
pp. 1767-1775 ◽  
Author(s):  
Feral Ozturk ◽  
Mehmet Gul ◽  
Burhan Ates ◽  
I. Cetin Ozturk ◽  
Asli Cetin ◽  
...  

The present study was planned to investigate the protective effect of 10 % and 20 % apricot-containing feed on carbon tetrachloride (CCl4)-induced hepatic steatosis and damage. Adult male Wistar rats (n42) were divided into six groups of seven each, as follows: control group; CCl4group; CCl4+10 % apricot group; CCl4+20 % apricot group; 10 % apricot group; 20 % apricot group. All apricot groups were fed with 10 % or 20 % apricot-containing feed for 5 months. CCl4injections were applied to the CCl4groups at the dose of 1 mg/kg for 3 d at the end of 5 months. In the CCl4group, vacuolated hepatocytes and hepatic necrosis were seen, especially in the centrilobular area. Hepatocytes showed an oedematous cytoplasmic matrix, large lipid globules and degenerated organelles. The area of liver injury was found significantly decreased with apricot feeding. Malondialdehyde and total glutathione levels and catalase, superoxide dismutase and glutathione peroxidase activities were significantly changed in the CCl4group and indicated increased oxidative stress. Apricot feeding decreased this oxidative stress and ameliorated histological damage. We concluded that apricot feeding had beneficial effects on CCl4-induced liver steatosis and damage probably due to its antioxidant nutrient (β-carotene and vitamin) contents and high radical-scavenging capacity. Dietary intake of apricot can reduce the risk of liver steatosis and damage caused by free radicals.


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. 


2019 ◽  
Vol 4 (1) ◽  
pp. 133-137
Author(s):  
Anastasiya S. Brichagina ◽  
Mariya I. Dolgikh ◽  
Larisa R. Kolesnikova ◽  
Larisa V. Natyaganova

Various pathologies, in particular hypertension, accompany violation of the processes of free radical oxidation. The state of the system lipid peroxidation – antioxidant protection can be assessed only by a complex of biochemical methods. The chemiluminescent method is used to obtain a faster result. The method has a number of advantages: measurement of chemiluminescence parameters is carried out in natural conditions and does not require sample preparation, is highly selective, it can be used to identify the presence of free radical pathology, analysis of the intensity of lipid peroxidation processes, the effectiveness of treatment with antioxidant medicament. The aim of the research was to study the lipid peroxidation under hypertension and stress by chemiluminescence. The experiment was conducted on male rats of the ISIAH line. The experiment consisted of 2 stages: stage of alarm and stage of chronic stress. We found that, depending on the type of stress, the state of the system lipid peroxidation-antioxidant protection differed. The role of stress in violation of the processes of lipoperoxidation in hypertension was established. The efficacy of the chemiluminescence method as an alternative to a complex of biochemical methods is shown. Express assessment of pro- and antioxidant status is possible for patients with hypertension.


2021 ◽  
pp. 136-143
Author(s):  
A.M. Irkaeva ◽  
◽  
E.S. Zhukova ◽  
T.G. Shcherbatyuk ◽  
V.V. Chernov ◽  
...  

At present impacts exerted by heliogeophysic factors on different living organisms are being examined more and more intensely. Over the last decade, it has been detected that meteorological factors play an important role in formation of adap- tation mechanisms in living systems. Sun and earth interaction is also known to directly influence rheological properties of human blood, both in a healthy body and in case there are chronic non-communicable diseases. Given that, impacts exerted by “cosmic weather” on living organisms, people in particular, are a stimulus to perform profound studies on reactions oc- curring as a response to effects produced by solar and geomagnetic activity, first of all, solar flares and magnetic storms. At present the most widely used approach to determining influences exerted by the Earth magnetic field on biologi- cal systems involves searching for correlations between different parameters of living organisms functioning and geo- magnetic indexes. Our research goal was to assess dependence between enzymatic activity of antioxidant protection system, exemplified by superoxide dismutase (SOD) and catalase, and geomagnetic field disturbances. The research focused on examining blood samples taken from conditionally healthy volunteers living in Nizhniy Nov- gorod region. SOD and catalase activity were determined in blood erythrocytes with spectrophotometry. Geomagnetic dis- turbances force was determined as per planetary Kp-index value. The research established a statistically significant correlation between SOD and catalase activity and a value of geo- magnetic field disturbance; this correlation allows making an indirect assumption that geomagnetic conditions directly in- fluence superoxide radical production in a body. Therefore, a change in superoxide radical production is a way for the geomagnetic field to influence living organisms. Activation of free radical oxidation can make for both occurrence and more intense clinical course of several diseases (espe- cially cardiovascular and neuropsychic ones). So, in future it is advisable to assess reactivity of antioxidant protection sys- tem as a response to geomagnetic fluctuations in case there are pathologic changes in a body.


Author(s):  
A. P. Matviiychuk ◽  
R. F. Yeremenko ◽  
A. V. Matviiychuk ◽  
A. V. Taran ◽  
O. M. Hladchenko

This article highlights the pharmacological study of new 7,8-disubstituted derivative of theophylline, the substance conditionally named benophylline. Based on the literature data and previous studies of compounds of this class, it has been concluded that studying the effect of benophylline on the pro-antioxidant system under simulated pathologies is of great interest and importance.  The study of antihypoxic action of 7,8-disubstituted theophylline in rats was carried out under modelled normobaric hypoxia with hypercapnia (in an enclosed space). It has been found out the application of 7-n-methylbenzyl-8-substituted polyphosphonates increases the longevity of rats in the conditions described above that evidences the improvement of metabolic processes in mitochondrial respiratory chain. Based on the results of screening studies, we selected 7,8-disubstituted derivative of theophylline (benophylline) as a leading substance for further investigation. The purpose of the study was to evaluate the efficacy of benophylline for the pharmacological correction of free radical processes in experimental renal damage in rats based on the evaluation of the expression of lipid peroxidation and antioxidant protection. Materials and methods: blood serum, homogenate and rat kidney tissues were the study materials. The study of the protective effect of benophylline on the functional state of the kidneys was investigated on experimental model of acute renal injury by introducing 50% water solution of glycerol (myoglobin nephropathy). Pathogenesis of this model was described in the methodological recommendations by C. Yu. Shtrygol, V. M. Lysovoi, I. A. Zupanetz et al. in «Methods of experimental modeling of kidney damage for pharmacological research». The content of TBK-R was determined spectrophotometrically by reaction with thiobarbituric acid. Glutathione recovered activity was determined spectrophotometrically in reaction with Elman's reagent using the method of Beutler E. D. et al. The catalase activity was assessed by the method of M.A. Koroluk et al. The influence of benophylline on the morphological state of the renal parenchyma was assessed on the modeled myoglobin nephropathy. The activity of gamma-glutamyltranspeptidase in serum was evaluated photometrically using a reagent test kit (“Filisit”). Statistical processing of the results was performed using the STATISTICA 8.0 software package, with the mean value, standard error of the mean confidence interval (p≤0.05). The microscopic study of microproducts was performed under the Granum microscope. Micrographs were taken with a Granum DMC 310 digital camera. The images were processed on a Pentium 2.4 GHz computer using Toup View software. Research results: Under the influence of benophylline, the processes of LPO and AOP became normalized, the expressiveness of degradation of the nephrocytes decreased, the microscopic picture of renal excretion in all rats got normalized. At the same time, 62.5% of the rats had the morphological condition of kidneys close to the intact control, and 37.5% of the animals were noticed to demonstrate a significant decrease in the dyscirculatory abnormalities, inflammatory manifestations and signs of nephrocyte regeneration. Conclusions: The ability of benophylline to inhibit the processes of free radical oxidation and to enhance antioxidant protection has been found out. The study has shown benophylline enhances regenerative effect kidney tissues.


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