Post-puberty age is characterized by the formation of a definitive level of morphofunctional indicators of the body, the processes of social adaptation to a new after school stage of life and level of education. For age-related physiology, the post-puberty age is of interest in terms of the timing of completion of growth processes, as well as factors that determine these boundaries. Differences in the timing of completion of growth processes in juvenile age are due not only to a genetic factor, but also to a complex of epigenetic effects. This paper analyzes the literature data on factors that determine the timing of stabilization of growth processes in post-puberty age. The results of the analysis allow us to scientifically justify the conditions for the full implementation of the genotypic trait of long body size. Modern ideas about humoral mechanisms of growth regulation indicate the relationship between the secretion of growth factors and environmental conditions. Numerous studies prove the association of growth hormone with the stage of delta sleep and physical activity, somatomedin-C-with a protein diet. Growth hormone synergists in certain concentrations are insulin, sex and thyroid hormones, while glucocorticoids are antagonists. These factors allow us to explain the secular variability of the longitudinal body parameters of the generations in 19th-20th and 20th-21st centuries, depending on socio-economic conditions, lifestyle, puberty, and nutrition. The significance of the genetic factor is confirmed by differences in the timing of stabilization of body length between populations of different racial and ethnic backgrounds, and the sensitivity of growth processes to environmental factors is appeared between different geographical latitudes populations. Therefore, along with the genetic factor, climatic and geographical conditions, food quality, sleep and wake patterns, and lifestyle are determinants that affect the variability in the timing of growth processes completion in postpubertal age.

Aim of the study was to analyze the event-related synchronization/desynchronization of brain electrical activity during visual selection task in patients underwent on-pump coronary artery bypass grafting (CABG) with and without postoperative cognitive dysfunction (POCD). Material and methods. The study included 32 men who underwent on-pump CABG, mean age 57.2 ± 6.08 years. All patients carried out extended neuropsychological testing, a multi-channel computer electroencephalography (EEG) 3-5 days before CABG and on the 7-10th day after the surgery. The POCD was determined according to the criterion: 20 % decrease in the cognitive indicator compared to that at baseline on 20 % of the tests included in the neuropsychological battery. Monopolar EEGs were recorded in 62 sites of 10-20 system with NEUVO encephalograph (Compumedics, USA) during cognitive task performing in patients wi h and without POCD. Statistical processing was performed using the STATISTICA 10.0. Results. It was found that the POCD patients had less pronounced theta desynchronization in the left frontal-central regions during the stage of 200-400 ms at the 7-10 days after CABG in comparison to patients without cognitive decline. Moreover, in the left parietal leads POCD patients had decreased theta desynchronization during the stage of 200-400 ms even before the surgery. At the 7-10 days after CABG, only the patients without POCD had a decrease of event-related theta activity in the left parietal leads compared with baseline. During the stage of 600-800 ms, the POCD patients had a lower degree of theta-desynchronization of both frontal-central and parietal regions of right hemisphere compared to patients without cognitive decline. Conclusion. The cognitive decline in patients after CABG determined according to neuropsychological testing is accompanied by pathological changes in the event-related theta activity. An analysis of event-related synchronization/desynchronization can be used both as predictor of postoperative cognitive impairment and as objective marker of POCD.

The aim of the study was to investigate Klotho protein levels in men with type 2 diabetes blood and its associations with several cardiometabolic risk factors. Material and methods. The study included 37 men with diabetes and 141 men without diabetes. Fasting blood samples were collected to measure Klotho protein levels and some biochemical parameters. Results and its discussion. The Klotho protein level in men with diabetes was significantly lower than in men without diabetes (374 [117; 500] and 515 [315; 1009] pg/dl, p<0.0001). Among the examined men with diabetes with a glomerular filtration rate of less than 60 ml/min/1.73 cm², the concentration of Klotho protein was 4 times lower than in the comparison group (104 [93; 118] and 413 [147; 535] pg/dl, p = 0.014) In men with diabetes, the Klotho protein was inversely correlated with the ratio of waist to hip circumference (-0.329; p = 0.047). But with multivariate analysis, only a tendency towards a negative association of the Klotho protein with abdominal obesity was determined (-0.385, p = 0.078). Conclusion. The content of Klotho protein in men with diabetes is significantly lower, especially in middle-aged men and in those with a reduced glomerular filtration rate. In men with diabetes, the Klotho protein has a negative correlation with the presence of abdominal obesity. In a multivariate analysis among men with diabetes, the Klotho protein tends to be inversely associated with the presence of abdominal obesity.

The paper considers the features and quantitative characteristics of the interaction of human blood plasma low (LDL), very low (VLDL) and high density lipoproteins (HDL) with a polycyclic aromatic hydrocarbon benzo[a]pyrene (B[a]P). Material and methods. The studies were performed using preparative ultracentrifugation of human plasma lipoprotein fractions and fluorescence spectroscopy. Results. The spectral characteristics of tryptophan fluorescence of VLDL, LDL and HDL fractions during titration with B[a]P solution are presented. The interaction of LP fractions with B[a]P was accompanied by quenching of tryptophanil fluorescence: the greatest decrease in fluorescence at saturating concentrations of B[a]P was noted for the HDL fraction — over 80 %; the effect of B[a]P was weaker for LDL (65-74 %) and for VLDL (50-60 %) of the initial level. Based on the results of the tryptophan fluorescence quenching curves and taking into account the molecular weights, quantitative characteristics of the interaction of the LP fractions with B[a]P were obtained: the association constants were of the order of (1.3 - 2.5) × 10^-6 M, and the number of binding sites for B[a] P on LP particles ranged from 19 for HDL and up to 43 for VLDL. Conclusion. The quantitative characteristics of the interaction obtained for the complexes of LP with B[a]P allow us to consider the LP of blood plasma as real transport forms for B[a]P and other hydrophobic compounds into the cells of organs and tissues of the body.

Neuroglobin is a representative of the globin group, an oxygen-binding protein which is predominantly expressed in the nervous system. Despite the large amount of conducted research, its role is still poorly understood. It’s assumed that neuroglobin is able to regulate cell activity in health and disease:in health it provides oxygen homeostasis of neurons, and in pathology it binds free radicals and nitrogen monoxide, blocks mitochondrial factors of apoptosis and suppresses oxidative stress. A clearer understanding of the role of neuroglobin in pathology can offer new approaches in the treatment of neurodegenerative diseases. Special attention in the literature is paid to the role of neuroglobin in cerebral ischemia, which among other cerebrovascular diseases is the cause of disability and mortality of the population all over the world. In the present article an overview of the literature data available to date on the study of the neuroprotective effect of neuroglobin in hypoxia/ischemia is provided: models used to study function in vitro and in vivo, the effects of its increased or decreased expression, neuroglobin-mediated neuroprotective action of hemin, estimated pathways of the induction of neuroglobin and views on the mechanisms of neuroprotection.

Free radical damage to the respiratory tract in patients with asthma leads to the destruction of the bronchial parenchyma and the generation of signaling molecules of inflammation by parenchymal cells. Objective: to study the role of the structural and functional status of granulocytes in the development of epithelial destruction and oxidative lipid modification in the bronchi of asthma patients with airway hyperresponsiveness to cold and hyperosmolar stimuli. Material and methods. In 48 asthma patients, the level of asthma control was assessed according to the Asthma Control Test (ACT) questionnaire; lung function; bronchial response to 3-minute isocapnic hyperventilation with cold (- 20 °C) air (IHCA) and with ultrasonic inhalation of hypertonic (4.5 %) NaCl solution (IHS). The cellular composition and the degree of cellular destruction in induced sputum (IS) were measured. Reaction products for enzymes from the group of heme-containing peroxidases (myeloperoxidase in neutrophils, peroxidase in eosinophils) with the calculation of the average cytochemical coefficient were studied. The content of lipid peroxidation products in according to ultraviolet absorption spectra of lipid extracts in exhaled breath condensate (EBC) was assessed. Results. Patients of group 1 (n=15) with airway hyperresponsiveness to IHCA and IHS in relation to group 2 (n=33) with a negative reaction had lower ACT (14.7±1.4 vs. 18.4±0.8 points, p=0.017). In sputum, the number of neutrophils in groups 1 and 2 was 41.8±6.4 vs. 33.6±3.4 %, eosinophils – 23.5±3.5 vs. 14.9±2.6 %; average cytochemical coefficient of peroxidase 117.5±12.5 vs. 88.8±8.9 pixels (p=0.07), cell destruction index (CDI) of bronchial epithelium 0.56±0.04 vs. 0.39±0.02 r.u. (p =0.0002). The content of diene conjugates (E233) in EBC in group 1 was higher than in group 2 (0.07±0.008 vs. 0.05±0.005 optical units, p˂0.05). A correlation was found between peroxidase level and CDI, the number of totally destroyed cells (IV class of cell destruction), between the number of neutrophils in IS and E233, as well as the ratio of E233 to E206 (non-oxidized lipids) in EBC. Conclusion. In asthma patients with airway hyperresponsiveness to cold and hyperosmolar stimuli, changes in the structure of the epithelium and the structural and functional profile of granulocytes are associated with the activation of the peroxidase function of granulocytes and are interrelated with lipid peroxidation.

Aim of the study was to estimate the prognostic value of perfusion and diffusion magnetic resonance imaging (MRI) methods in systemic evaluation of perifocal changes of malignant masses in women’s pelvis. Material and methods. A retrospective analysis of MRI of the pelvic organs in women was performed on MRI scanners with a magnetic field of 1.5 T (Philips Achieva, Netherlands). The retrospective study included 1,5 T MRI of 530 women with pelvis pathology. It consists of 50 % (265 cases) of malignant pelvic mass and 50 % (265 cases) of non tumor pathologies. The most common malignant pathologies were regarded: rectum cancer (n=61), ovarian cancer (n=62), uterine cancer (n=65), cervical cancer (n=77). Group with non-tumor pathology was taken as comparison group and included inflammation (abscess), adhesions and other non-tumor pelvic pathologies (pseudocyst of peritoneum, hemorrhagic cyst, endometriosis). In all cases a body coil was used on pelvic region. MRI protocols included T2-, T1 – weighted imaging, diffusion weighted imaging, postcontrast T1 - weighted imaging. apparent diffusion coefficient value and perfusion value were estimated. Results and discussion. In intergroup comparison with systemic evaluation of MRI with ANOVA we revealed that the diffusion restriction and the apparent diffusion coefficient bear potential value for disease prognosis. Conclusions. MRI can be of value not only for evaluation of local spread, as well as providing wide opportunities for differential diagnosis and use of MRI as biomarker in some diseases. Such indications as restricted diffusion, apparent diffusion coefficient value and type of dynamic curve from perifocal lesion can benefit disease prognosis.

Given the global trend of population aging, it is natural to see an increase in the number of percutaneous coronary interventions (PCI) performed in patients of older age groups.The aim of this study was to compare the results of percutaneous coronary interventions (PCI) in different age groups and find a predictors of hospital mortality. Methods. Data were collected from 1649 patients with STEMI who were admitted to the coronary care unit and underwent PCIs from
2006 to 2017. Patients were divided into 3 age groups according to World Heals Organization classification. The first group consisted of 850 patients aged from 18 to 59 years, the second group consisted 620 patients aged from 60 to 74 years, and third group consisted of 179 patients aged from 75 years and older. Results. The rate of in-hospital death was statistically significant lower in younger groups (groups 1-2: 2.2 % vs 5.8 %, р<0.001; groups 1-3: 2.2 % vs 16.2 %, р<0.001; 2-3: 5.8 % vs 16.2 %, р<0.001). After multivariate adjustment the independent predictor of death were age (odds ratio (OR) =1.08; 95 % confidence interval (CI) 1.05-1.11, р<0.001), anterior myocardial infarction (OR=2.03; 95 % CI 1.15-3.59, р=0.015), Syntax score (OR=1.05; 95 % CI 1.02-1.09, р=0.001), ventricular arrhythmias (OR=4.98; 95 % CI 2.49-9.96, р<0.001), blood glucose level at admission (OR=1.06; 95 % CI 1.01-1.13, р=0.040), PCI failure (OR=5.05; 95 % CI 2.47-10.3, р<0.001), Killip class III-IV (OR=6.01; 95 % CI 3.12–11.6, р<0.001), total ischemia t-me >180 minutes (OR=4.39; 95 % CI 1.78-10.8, р=0.001). Conclusions. PCIs for STEMI in older age groups were associated with worse in-hospital outcomes. Age, anterior myocardial infarction, Syntax score, ventricular arrhythmias, blood glucose level at admission, PCI failure, Killip class III-IV, total ischemia time >180 minutes were the independent predictor of death.

Aim of the study was to investigate the possibilities of contrast-enhanced ultrasound (CEUS) of the prostate gland in the diagnosis of malignant tumors by analyzing the shapes of the «time – intensity» curves. Material and methods. Sixty six patients with suspected prostate cancer were examined. According to CEUS data, the shapes of «time – intensity» curves were estimated with the selection of 4 types, the results were compared with the histology data. Results. For malignant focal changes in the pancreas, type I time-intensity curve was more often characteristic – a rapid increase in contrast from the first seconds, followed by rapid washout during the study (85 %). The sensitivity, specificity, and accuracy of this feature in the diagnosis of prostate cancer were 85, 89 and 86 %, respectively. Conclusion. Evaluation of the shape of the curve «time – intensity» during the CEUS of the prostate gland allows for differential diagnosis of focal changes in the prostate gland and determine the area for targeted biopsy.

Introduction. Colon cancer (RCC) clinically manifests itself in the late stages, therefore, early diagnosis presents significant difficulties. There are many types of microorganisms in the human colon that form symbiosis with intestinal cells to maintain normal function. Аim of the study was to determine the composition of the parietal microflora of the colon under conditions of a tumor process and to assess the possibility of using these data in the diagnosis of colon cancer. Material and methods. The main group included 63 patients operated on for cancer (adenocarcinoma) of the left half of the colon (descending, sigmoid, rectosigmoid regions) with I T1-2N0M0, II T3-4aN0M0, III T1-2N1M0 stages of the tumor process. Among them are 32 men and 31 women aged 20 to 75 years (57.7 ± 3.8 years). In all patients, before hospitalization, the tumor was confirmed by colonoscopy followed by histological examination. The group of clinical comparison in the amount of 25 people consisted of patients with chronic hemorrhoids without exacerbation, who underwent colonoscopy. Material from the main group, biopsies of tumor tissue and visually unchanged colon mucosa, were taken intraoperatively during tumor removal. In patients of the clinical comparison group, the material was taken during the colonoscopy process. The composition of the intestinal microbiota was determined by a bacteriological method. Results and discussion. As a result of comparing the colon microbiota of cancer patients and the clinical comparison group, statistically significant differences in the quantitative composition of Lactobacillus spp., Bifidobacterium spp., Bacteroides spp., Clostridium spp., Enterococcus spp., Escherichia coli (typical), Escherichia coli (lactose-negative), Enterobacteriaceae, Staphylococcus spp. (CNS), Candida spp. It was established for the first time that Bifidobacterium spp., Enterococcus spp. and the age of the patient can be further used in the diagnosis of a malignant process. Conclusion. The created additive model can be used as an additional screening criterion in the early diagnosis of colon cancer.

The degree of morbidity of the population of the Republic of Buryatia with malignant neoplasms without subdivision by localization from 1996 to 2019 was analyzed according to the data of the Republican Clinical Oncological Dispensary. Material and methods. The data on the incidence of malignant neoplasms in the population of municipalities of the Buryat Republican Clinical Oncological Dispensary, expressed in intensive («rough») indicators (PI) per 100 thousand population (ppm, 0/0000) have been analyzed. The zoning of the incidence of the population has been based on the approach of medico-geographical typification of the territory. The range of indicators of the incidence of cancer in the population served as the basis for identifying four types of territories by the levels of cancer pathology: low – medium – high – very high. The dynamics of morbidity was analyzed by the average indicators of four 5-year periods (1996–2000, 2001–2005, 2006–2010, 2011–2015) and one 4-year period (2016–2019). Cartographic processing of the material was performed using Paint.NET. The comparison of morbidity in 21 municipal districts has been carried out. In period 1, there were 4 districts with low pathology (90–134 people): Okinsky, Muisky, Tunkinsky, Zakamensky districts, and with very high pathology (225–277 cases) – 4 districts: Pribaikalsky, Kabansky, Zaigraevsky, Bauntovsky. In the second period, the Okinsky, Tunkinsky, Dzhidinsky districts had low rates (100–158 cases), and the North-Baikalsky, Ivolginsky, Selenginsky, Kurumkansky, Mukhorshibirsky districts had very high level (257 and more). In the third period: low incidence rate (100–150 cases) has been determined in Muisky, Kizhinginsky districts, very high rate (274–331 cases) – in Bauntovsky, Kabansky, Zaigraevsky, Tarbagataisky districts. In the fourth period: low pathology rate (155–212 people) was in Okinsky, Zakamensky, Muisky, Eravninsky, Ivolginsky districts, very high level (329 cases) was in Bauntovsky district. In the last four years: low case rate (138–204) was only in Okinsky district, very high pathology level (339–405 people) was in 5 districts, to Bauntovsky, Kabansky, Pribaikalsky districts were added the northern districts: Severo-Baikalsky and Barguzinsky. Territories with high indicators of malignant neoplasms include: Pribaikalsky (393.5 ± 39.9 ⁰/₀₀₀₀), Kabansky (397.5 ± 21.9 ⁰/₀₀₀₀), Zaigraevsky (318.2 ± 13.6 ⁰/₀₀₀₀), Bauntovsky (403.6 ± 51.6 ⁰/ ₀₀₀₀); with reduced ones – Zakamensky (241.1 ± 17.4 ⁰/₀₀₀₀), Tunkinsky (215.9 ± 6.8 ⁰/₀₀₀₀), Eravinsky (214.3 ± 16.5 ⁰/₀₀₀₀), Okinsky (137.8 ± 6.1 ⁰/₀₀₀₀) districts. The malignant neoplasms incidence of the population of the Republic Buryatia is high, and it is growing every year.

Aim of the study was to explore the gender characteristics of the circadian rhythm of carbohydrate metabolism in men and women with normal body weight. Materials and methods. 15 men and 22 women aged 18 to 56 entered the study and underwent clinical, antropometric, biochemical and hormonal examination. Standard oral glucose tolerance test (OGTT) was also performed in the morning and in the evening. Results and discussion. During OGTT performed in morning time there were no differences in mean baseline blood glucose levels between men and women. However higher glucose levels at 120th minute of the test in men demonstrated relative deceleration of glucose utilization in the morning in this group. Higher glucose levels at 120th minute during OGTT in the evening both in men and women comparing with baseline results, and also higher glucose levels at 120th minute of the test in the evening comparing with morning test, indicate decreased glucose tolerance. Insulin to glucose ratio values in men at all timepoints during OGTT were comparable in the morning and in the evening, but in women they were found to be higher in the evening than in the morning. Conclusion. In evening time both in men and women with normal body weight reduced rate of glucose utilization in peripheral tissues reflects circadian rhythm of carbohydrate metabolism. Gender differences of the circadian rhythm of carbohydrate metabolism consist in reduced glucose tolerance in the morning in men comparing to women that is associated with higher waist to hip circumference ratio in men which in turn is related to cumulation of visceral adipose tissue. Presumably greater amount of visceral adipose tissue in men determines more pronounced manifestations of insulin resistance in the morning.

Data on the performance of individuals with the early repolarization phenomenon (ERP) are contradictory. Aim of the study was to investigate the aerobic physical performance of individuals with ERP. Material and methods. 536 healthy men aged 18–45 years, who do not have contraindications to perform a load test according to physical, laboratory and instrumental examination (ECG, spirometry, echocardiography, clinical blood analysis), and who reached the VO₂max during cardiopulmonary exercise testing were included in the study. We compared physical performance of groups formed on the basis of ECG data: the main group - persons with ERP (113 people) and the control group-persons without ERP (423 people). Results. In the group with ERP, the VO₂max, cardiac output, oxygen pulse and stroke volume at peak load were lower than in the group without ERP, by 5.8 % (p=0.03), 9.2 % (p=0.05), 7.2 % (p=0.01) and 8.9 % (p=0.04). When compared to echocardiography data, the final systolic size of the left ventricle in the group with ERP was 12.6 % larger than in the group without ERP (p=0.03). Conclusion. In individuals with ERP, a decrease in cardiac output was detected, which may be associated with a relative deterioration in left ventricle systolic function and may affect the aerobic physical performance. The described differences were revealed only after removing the influence of anthropometric, spirometric and laboratory indicators.

The problem of demographic aging intensity growth is increasingly raised in the scientific community. Patients belonging to the senile age group have a number of reasons that reduce their quality of life, as well as reduce the effectiveness of treatment and rehabilitation. The most important information node involved in providing functions such as an integrative role in cognition, starting from learning and memory and ending with flexible adaptation is the structure of the intermediate brain – the thalamus. The aim of the study was to conduct a comparative analysis of agerelated morphometric characteristics of human thalamuses in the first period of adulthood and in old age according to magnetic resonance imaging. Material and methods. The results of morphometric study of the thalamuses of 83 people were analyzed, which were divided into two groups based on their age. Group I included 46 people of the first period of Mature age, group II included 37 people of senile age. All patients had a history of diseases and injuries of the Central/peripheral nervous system, alcohol and drug addiction, and were right-handed. The transverse, longitudinal, and vertical parameters of the thalamuses in both hemispheres of the brain were determined. Results. It was found that the parameters of the thalamus prevail in the first period of adulthood in both men and women (p<0.01). At the same time, there was no statistically significant difference between the morphometric parameters of the thalamuses in the hemispheres, but there was a tendency to a predominance of linear dimensions in the left thalamus (p>0.05). We found a tendency to slightly exceed the indicators of the thalamus in men in comparison with the indicators established in women (p>0.05). Conclusion. The results obtained can serve as starting points as the equivalent of the anatomical age norm of the human thalamus in the first period of adulthood and senile age, which in the future will allow for a personalized approach in medical practice.