Myocardial infarction is a formidable manifestation of coronary artery disease and accounts for one third of deaths associated with coronary disease. In Russia, from 400 to 500 thousand patients with acute coronary syndrome are hospitalized annually, about half of them with myocardial infarction (MI). The dynamics of the number of hospitalized patients in recent years indicates its reduction. Short-term mortality (30-day, including hospital mortality) after acute MI has decreased significantly over the past 50 years: in absolute terms from 30 % in 1950 to 5–8 % at present. However, long-term mortality after MI did not improve. Moreover, in recent years, the rate of decline in 30-day mortality from MI has decreased significantly, almost reaching a “plateau” over the past 15 years. It has been established that in terms of the impact on survival, disability and quality of life of the working population, MI is an important not only medical but also social problem. This review of the literature discusses changes in approaches to reducing mortality in MI, as well as the main events in evidence-based cardiology over the past 50 years, which have made it possible to effectively manage the risk of death in this category of patients.

The article is a literature review concerning certain aspects of the history of Russian dentistry. In this regard, minimally invasive methods are discussed, including air-abrasive, laser, sonic and ultrasonic preparation, as well as atraumatic restorative treatment without mechanical preparation. Indications for minimally invasive methods, assessment of caries activity and prognosis, causes and mechanisms of the accelerated restoration cycle are discussed. The need to preserve dental tissues has been undervalued in the past. Non-selective preparation to hard dentin is currently considered hypertherapy. The concept of minimally invasive dentistry is also applied in endodontics and periodontology. In patients with gingival recession, it is important to protect atrophic tissues from further damage. After a tooth extraction, excessive socket curettage should be avoided. The research in dentistry should be protected from conflicts of interest. Patients should be objectively informed about treatment options, given recommendations based on clinical indications, wishes and possibilities. It is also necessary to develop economic measures in order to reorient private dental clinics to receive patients with compulsory medical insurance and the use of minimally invasive methods.

Currently, in Russia and in the world, there is an increase in the proportion of overweight and obese people among the population, which contributes to an increase in the number of socially significant diseases. Obesity is associated with the predominance of the proportion of fat mass in the component composition of the body. Based on this, increased attention is paid to a comprehensive study of the functioning of all types of human adipose tissue, which is necessary for the further use of this knowledge in the fight against obesity. This article provides an overview of the literature data on the structure and properties of the PRDM16 gene, the features of its functioning in brown, white and beige adipose tissue. The influence of the PRDM16 gene on the activation of brown adipogenesis and the formation of beige adipocytes in white adipose tissue, which contribute to increased heat production of cells by means of non-contractile thermogenesis and improvement of metabolic parameters of the body, is considered. Data on the role of PRDM16 protein in the treatment of obesity, type 2 diabetes mellitus and other human diseases associated with it are analyzed. The results on the methods of effective activation of brown and beige adipocytes and the use of these methods in the treatment of obesity are presented.

The pathogenesis of metabolic syndrome (MS) is characterized by obesity, hypertension, dyslipidemia and insulin resistance. MS increases the risk of developing type 2 diabetes mellitus (DM2). The neuronal isoform of nitric oxide synthase (nNOS) is defined by complex protein-protein interactions, since nNOS, unlike other isoforms of NOS,contains a C-terminal PDZ domain, which allows it to conjugate with other proteins and, first of all, to interact with an adapter of neuronal, or type 1, nitric oxide synthase (NOS1AP), also denoted CAPON in our work. Changes in the interaction between nNOS and NOS1AP lead to metabolic disorders in brain, heart, liver and skeletal muscles, which plays a key role in the development of MS and T2DM. NOS1AP, interacting with the PDZ domain of nNOS, competes with the postsynaptic density protein (PSD95) and regulates the stability of subcellular localization of nNOS and enzyme expression during synapse formation. NOS1AP promotes nNOS binding to targets such as small GTPase (Dexras1), synapsines, regulating the formation of dendritic roots, mediates activation of the nNOS-p38MAP kinase pathway during excitotoxicity. It has been shown that single-nucleotide polymorphism of the NOS1AP gene and its overexpression in the myocardium leads to the manifestation of long QT syndrome, which is most clearly manifested in elderly patients with DM2. It was found that the genetic polymorphism of NOS1AP affects insulin secretion when using calcium blockers, and can promote the development of DM2. The functional role of NOS1AP in stabilizing the functions of skeletal muscle nNOS in the cytoskeletal complex associated with dystrophin/utrophin was discovered. The purpose of the review is to provide updated information on the role of NOS1AP and the nNOS/NOS1AP complex in the pathogenesis of MS and DM2. The potential molecular mechanisms of the interaction of NOS1AP with nNOS and with other proteins, which leads to change in nNOS activity, localization and content, are discussed.

Cardiovascular disease is widespread at the present time, causing the disability of the population. The main risk factors are hyperlipoproteinemia, hypertension, hyperglycemia, etc. Blood-red hawthorn Crataegus sanguinea, a species of the genus Hawthorn (Crataegus) of the Rose family (Rosaceae) is a universal remedy for the prevention of diseases of the cardiovascular system. Hawthorn medications have antihypertensive, cardioprotective, cardiotonic, antiarrhythmic, mild diuretic, antispasmodic and sedative effects. At the same time, biologically active substances of hawthorn are non-toxic and do not have pronounced side effects with prolonged use. In this regard, it is important to study the mechanisms of pharmacological action of drugs based on this plant in order to prolong and improve the quality of life of the population.

Sensory motor activity is a typical form of purposeful human functioning that plays a significant role in the work of power structures. Its research is widespread in all spheres of military medicine. The aim of the study is to systematize the components and principles of organization of structural and functional elements of the central nervous system providing sensorimotor reactions based on the literature data. We obtained results on the combination of the somatotopic arrangement and the hierarchical principle of organization of sensorimotor circuits, according to which three levels are distinguished - medullary, subcortical and cortical. Sensory signals are converted into explicit motor signals as early as possible, and are subsequently subjected to modulating influences from memory, attention, and other neurophysiological processes at each of the above levels. Thus, sensory and motor information processing should not be regarded as the result of isolated neural circuits, but as extensive and closely interconnected networks covering the cerebral cortex and subcortical structures, in unity with other neurophysiological phenomena, such as memory and attention. The neuromorphological basis for the organization of sensorimotor reactions should be considered when developing a set of measures for professional selection, training, pharmacological correction of combat conditions and treatment of posttraumatic syndrome in employees of power structures.

A fistula of the anus is a chronic inflammatory process in the pararectal cell, intersphincter space and anal crypt with the presence of a formed fistula passage, where the affected anal crypt is the internal opening of the fistula. The urgency of surgical treatment of rectal fistulas is due to unsatisfactory results because of frequent anal incontinence and relapses of the disease. In this regard, most authors emphasize that the treatment of anal fistulas, as before, remains an urgent problem of colorectal surgery, and the search for new methods is a priority task of colorectal surgery. Literature analysis performed using the Elsevier, PubMed, eLIBRARY.RU, CyberLeninka, Google Scholar databases showed that the currently used technologies and methods of surgical treatment of anal fistulas do not allow us to determine their “gold standard”. In this regard, further analysis of the effectiveness and safety of their use, an assessment of the complications of surgical intervention and the frequency of relapses of the disease is necessary.

Ankle joint injury is one of the leading nosologies in the general structure of the musculoskeletal system lesions, not only among professional athletes, but also among the adult population in general. In case of conservative therapy ineffectiveness, chronic instability of the ankle joint develops, which can significantly reduce the patient’s quality of life, in this situation, the surgical treatment becomes uncontested. The choice of the surgical intervention method is determined not only by the nature of the injury, but also by the ligamentous-tendon apparatus condition. In addition, to a large extent, surgical tactics is chosen based on the preferences of the individual surgeon. The article describes the anatomical and physiological features and risk factors that determine the occurrence of acute the ankle joint instability and its transition to a chronic state, as well as the main methods of the anterior talofibular ligament plastic surgery and their common modifications. Special attention is paid to the effectiveness evaluating methods of surgical techniques on cadaveric ligamentous material. An analysis of the literature shows that the study of the issue remains insufficient. New clinical data obtaining will increase the effectiveness of the surgical technique for ankle instability treating and significantly improve the quality of life of patients.

Own and literature data showed a change in the free radical oxidation products and indicators of the glutathione system concentration in menopausal women with insomnia. The change in the studied parameters depended on the ethnicity of the patients. The aim of the study was to assess the informative value of these indicators and their contribution to the state of free radical homeostasis in menopausal women of Russian and Buryat ethnic groups with insomnia. Material and methods. The study involved women of the menopausal period of the Russian (n = 136) and Buryat ethnos (n = 94). The women underwent a general clinical examination and a questionnaire. Then they were divided into climacteric phases, control groups and groups with insomnia. Enzyme immunoassay, spectrophotometric and fluorometric methods of analysis were used to determine values of glutathione system and biomolecule oxidation products. The informative value of the studied indicators and their contribution to the state of free-radical homeostasis was assessed with the help of discriminant analysis. Results and discussion. The most informative indicators in the group of Russian women with insomnia in perimenopause were content of advanced glycation end products (AGEs), advanced oxidation protein products (AOPP), products of DNA oxidative modification, oxidized glutathione, glutathione reductase activity; in postmenopause – concentration of AOPP, products of DNA oxidative modification, and glutathione reductase activity. In Buryat perimenopausal women the most informative values were content of AGEs, of reduced and oxidized glutathione and their ratio, and in postmenopause – content of AGEs, of oxidized glutathione and glutathione reductase activity. Mathematical models have been developed that demonstrate the prevalence of the redox balance prooxidant component contribution in Russian ethnic group and the antioxidant component in Buryat ethnic group and allow characterizing patients with insomnia with high accuracy depending on the phase of menopause and ethnicity. Conclusions. In women of the Russian ethnic group with insomnia in the menopausal period, the greatest contribution to the state of free radical homeostasis is made by the products of oxidation of biomolecules, which characterizes the predominance of the processes of disadaptation. In women of the Buryat ethnic group, in response to insomnia in the climacteric period, the components of the glutathione system make the greatest contribution to the state of free radical homeostasis, which characterizes the activation of adaptive capabilities throughout the climacteric period.

The aim of the study was to evaluate associations between content of surfactant proteins SP-A and SP-D and blood lipid parameters in men and women in Novosibirsk. Material and methods. In 2022, 174 people (87 men and 87 women), aged 45 to 69 years, randomly selected from the residents of Novosibirsk, were examined. Content of total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), triglycerides (TG) in blood was determined by direct enzymatic method, concentration of surfactant proteins SP-A and SP-D – by enzyme immunoassay. Results. It was found that in the general sample of examined individuals, the content of SP-A in the blood is directly related to the level of HDL cholesterol and negative with the concentration of TG and hypertriglyceridemia; in men it was positively correlated with the level of HDL cholesterol, and in women it was positively correlated with low levels of HDL cholesterol (hypoHDL cholesterol). According to the results of ROC and multivariate analyze, it was found that blood SP-A level of at least 1642 pg/ml has a diagnostic value in the detection of hypo HDL-C in women (sensitivity is 56.3 %, specificity is 81.7 %,) and increases the risk of having hypo HDL-С in the total sample of the examined persons and in the women by 3.4 and 7.4 times, respectively. Using multivariate analysis, the reverse effect of blood SP-A content on hypertriglyceridemia was determined in the total sample of men and women in Novosibirsk. No associations were found between SP-D concentration and the studied lipid characteristics of the blood. One of the possible mechanisms of the SP-A influence on lipid metabolism (level of HDL-C, TG, hypoHDL-C, hypertriglyceridemia) in men and women in Novosibirsk is its effect on cell membranes, inducing the redistribution of the CD36 scavenger receptor, as well as changes in expression of this receptor.

The antitumor antibiotic doxorubicin, a representative of a large group of anthriacyclines, is widely and quite effectively used to treat patients with malignant neoplasms. The aim of this study was to study the effect of TS-13, a synthetic phenolic antioxidant and an activator of the antioxidant-responsive element redox-sensitive signaling system Keap1/ Nrf2/ARE, on the functional parameters of an isolated rat heart after a course of doxorubicin administration. Material and methods. Male Wistar rats (n = 24) were divided into three groups: control (n = 10), doxorubicin group (n = 7) (3 weekly intraperitoneal injections of doxorubicin solution at a cumulative dose of 15 mg/kg) and doxorubicin + TS-13 (n = 7) (administration of doxorubicin according to a similar scheme, TS-13 solution with drinking water). On the 21st day after the start of the experiment, the cardioprotective effect of TS-13 was assessed on the ex vivo model of perfusion of the heart isolated according to Langendorff. Coronary flow, heart rate (HR), pressure in the left ventricle (myocardial contractility) were recorded as parameters of myocardial functional activity; the integral indicator of myocardial contractility (working capacity) was calculated as the product of HR and pressure in the left ventricle. Results and discussion. The general toxic effect of doxorubicin was manifested in a significant decrease in rat body weight (by 21 %), the administration of TS-13 reduced the cachectic effect of the cytostatic. Doxorubicin worsened heart work by all studied parameters (coronary flow, HR, myocardial contractility and integral index of contractility); the effect persisted throughout the entire perfusion period (40 min). Animals treated with intraperitoneal injections of doxorubicin and TS-13 per os lost weight to a lesser extent, the functional activity of isolated hearts improved significantly – coronary flow, pressure in the left ventricle, and working capacity increased. Conclusions. Since, as we have shown earlier, TS-13 administration not only does not cancel, but even potentiates the antitumor activity of doxorubicin, the results obtained indicate the promise of using TS-13 as an adjuvant therapy for malignant neoplasms, enhancing the antitumor effect of the cytostatic and leveling its side effects, including cardiotoxicity.

The development of safe drugs occupies a special place in the pharmaceutical industry. One of the main tasks of its preclinical phase is to evaluate possible toxic effects of the developed drug on the body and on various systems, including the immune system. The aim of our work was to study immunotoxic properties of pegylated hyaluronidase (PEG- HYAL). Material and methods. Mice F1(CBA/C57Bl/6) were divided into subgroups which were intragastric and intraperitoneally administered with PEG-HYAL in different dosages (50, 500, 1250, 2500 and 5000 U/kg). The number of antibody-producing cells in the spleen, the mass and cellularity of central and peripheral immune organs, phagocytic activity of peritoneal macrophages and neutrophils, delayed hypersensitivity reaction (DHR), level of hemagglutinin to sheep erythrocytes, spontaneous and mitogen-induced splenocyte proliferation were determined. Results. PEG-HYAL did not induce DHR, did not suppress phagocyte activity of peritoneal macrophages, at a dose of 50 ED/kg did not significantly affect the hemagglutinin content to erythrocytes, but at a dose of 500 ED/kg did statistically significantly reduce the titer of specific antibodies. When experimental animals were exposed to PEG-HYAL at doses of 50 and 500 U/kg, spontaneous and mitogen-induced proliferation of splenocytes decreased. Conclusions. The PEG-HYAL trial produced results that can be used to substantiate the administration of the PEG-HYAL-based medication.

TS-13 (sodium 3-(3’-tert-butyl-4’-hydroxyphenyl)propylthiosulfonate) is a synthetic antioxidant that has demonstrated biological effectiveness in numerous studies in modeling pathological conditions in vivo, in particular, in the model of Parkinson’s disease. In order to establish whether these effects are mediated or associated, among other things, with the direct effect of TS-13 on the organs and tissues of animals, in this work, the concentration of TS-13 in rat blood plasma and brain after intragastric administration was determined. Material and methods. After a single intragastric administration of a solution of TS-13 at a dose of 100 mg/kg, biomaterial (blood, brain) was taken for 24 h in male Sprague Dawley stock rats (n = 57). To measure the concentration of a substance in samples, a bioanalytical method was developed and validated using high-performance liquid chromatography with UV detection. Results and discussion. The method of quantitative determination was developed by us for the first time and validated before the study. It has been established that the calculated values of the calibration samples meet the acceptance criteria (have the required accuracy and precision) in the concentration range from 0.05 to 6 µg/ml, R=0.9998. The results of determining TS-13 concentration in rat blood plasma and brain showed that after a single administration per os, the compound enters the blood, where it is detected for 15 h (mean retention time 7.94 h, half-life 7.59 h, elimination constant 0.13 h-1, total clearance 40.1 l/(kg × h)), and also penetrates the blood-brain barrier, quickly entering the brain (maximum concentration is reached after 1 h). The compound has a low affinity for brain tissue (tissue availability 0.32), and therefore its concentration does not reach high values, however, a slow excretion of the substance is observed - the average retention time is 6.56 h, the half-life is 6.43 h, the elimination constant 0.11 h-1. Conclusions. After a single intragastric administration to rats, TS-13 enters the blood, where at least part of it is detected unchanged after 30 minutes, reaching maximum values after 1 hour. Similar kinetics of the substance is characteristic of the brain, where it is found in smaller amounts. Thus, as a result of the study, it was shown that TS-13 penetrates the blood-brain barrier and is able to directly affect brain structures, which, however, does not negate the possibility of an indirect effect mediated by the ability to change the activity of intra- and intercellular signaling systems.

The purpose of the study is to associate alcohol consumption with the level of surfactant proteins SP-A and SP-D in Novosibirsk population. Material and methods. 174 people (87 men and 87 women) aged from 45 to 69 were examined. The study participants were randomly selected. Alcohol consumption was assessed using the AUDIT test. The content of surfactant proteins SP-A and SP-D in blood serum was determined by enzyme immunoassay using standard ELISA test sets. Statistical analysis was performed using parametric and nonparametric methods of descriptive statistics, correlation analysis was performed using Spearman criterion, and multivariate analysis was performed using binary logistic regression. ROC analysis was used to evaluate the diagnostic significance of the variables and to determine sensitivity and specificity. The critical level of significance for the null hypothesis (p) was accepted to be 0.05 in all statistical analysis procedures. Results. A typical single dose of alcohol consumed of 7–9 alcohol units (TSDAC) was inversely associated with SP-A content (r = –0.154, p = 0.043) in a general sample of men and women aged 45–59 years in Novosibirsk. By means of ROC analysis, SP-A was found to be a marker (area under the ROC curve equals 71.2 %) of alcohol intake in TSDAC. With a SP-A level not more than 921 pg/ml, its sensitivity to the determination of alcohol consumption in TSDAC is 68.7 %, the specificity is 87.5 %. Regression analysis showed that the variable “TSDAC” directly affects the presence of SP-A in a concentration not preceding 921 pg/ml (Exp (B) = 13.0; 95 % CI = 1.5; 111.0, p = 0.019) regardless of age and sex. In the general sample of men and women in Novosibirsk aged 45–69 years, as well as in men, inverse associations of Sp-D content with the presence of >0 points were found in the answer to the AUDIT test question “How often during the last year have you not done something that was expected of you?”. It was determined that women had a higher level of SP-A in the blood than men. Perhaps this is due to the fact that women smoked less often than men (10.3 and 23.0 %, respectively, p = 0.020). So, it was established that a high TSDAC is an independent factor directly influencing the presence of SP-A level in the blood not exceeding 921 pg/ml for men and women aged 45–69 years in Novosibirsk.

In 70 % of cases of neonatal death, in 36 % of cases of infant mortality, in 25–50 % of cases of long-term neurological consequences in children, one of the causes is preterm birth. The course of pregnancy depends on the availability of vitamin D. The aim of the study was to determine the level of vitamin D and to analyze the obstetric and gynecological history in patients with preterm labor. Materials and methods. The study included 35 patients with preterm delivery and 30 women with the physiological course of labor. In the surveyed, vitamin D sufficiency was assessed by the content of 25(OH)D in blood serum, which was determined according to the clinical recommendations of the Russian Association of Endocrinologists, using the enzyme immunoassay method. Results. In patients with preterm labor, vitamin D deficiency and a high level of chronic inflammatory diseases of the respiratory, kidney and pelvic organs were revealed. Conclusions. Therefore, when managing pregnant women, it is necessary to take into account their availability of vitamin D and, possibly, recommend taking vitamin D preparations from the period of preconception preparation and during gestation.

Aim of the study was to assess the possibilities of recovering the functions of attention and short-term memory in patients with vascular cognitive disorders using a computer program for cognitive training. Material and methods. The study included 17 cardiac surgery patients who underwent a course of cognitive training, starting from 3–4 days after surgery, daily for 5–7 days. The cognitive training program consisted of tasks stimulating the functions of selective attention, visuospatial and working memory. Results. Almost all patients (88 %) reported an acceptable level of subjective difficulty in the performing cognitive training. After completing the cognitive training program, the selective attention improved in 53 % of cases, working memory – in 67 %, the visuospatial memory test scores – in 47 % of patients. Conclusions. The computer-based cognitive training program showed acceptable subjective difficulty in cardiac surgery patients. Approximately 50 % of patients showed an improvement in trained cognitive functions at the final stage of training. The results of approbation of the cognitive training program give an opportunity to determine the degree of compliance of cognitive rehabilitation methods with the psychophysiological status of patients undergoing cardiac surgery, including in the late postoperative period.

Following vegetarian diets means, to varying degrees, the exclusion of animal products from diets, which, if poorly planned, can lead to deficiency of some nutrients. Aim of the study was to evaluate some indicators of nutritional security of children with a restrictive type of nutrition and living in the territory of a long-term military conflict in the Donbass. Material and methods. 80 school-age children following restrictive diets were examined. All patients were divided into two groups: 40 children following a dairy-free diet (group 1), 40 children on a vegetarian type of diet (group 2). The control group consisted of 30 children who adhere to the traditional type of diet. Calcium, ferritin, vitamin B12 and zinc content in blood serum were studied in all children, living in Donbass. Results. In group 1 deficiency of calcium was found in 60.0 %, of zinc – in 32.5 %, of vitamin B12 – in 15.0 %, a decrease in ferritin content – in 22.5 %. In group 2 level of ferritin was declined in 55.0%, zinc deficiency was detected in 37.5 %, vitamin B12 deficiency – in 30.0 %, calcium deficiency – in 10.0 %. Conclusions. For children on a long-term dairy-free diet, calcium and zinc deficiency is characteristic, as well as a decrease in tissue iron reserves. Children who observe lactovegetarianism are characterized by a deficiency of zinc and vitamin B12, as well as a decrease in the concentration of ferritin in the blood serum. Children living in the Donbass in the conditions of a long military conflict and adhering to restrictive types of nutrition can be considered as a risk group for the development of deficient conditions. To correct the identified imbalance, it is necessary to develop programs for the supplementation of macro- and micronutrients.

Despite the improvement of prostate cancer (PCa) diagnostic methods and the introduction of prostate-specific antigen (PSA) monitoring, the incidence of advanced PCa in Russia remains high. New more informative variables are needed for the effective diagnosis of early stage and high-grade PCa. In the field of epigenetics of special interest is the detection of DNA hypermethylation, which can serve as a PCa biomarker, since it is common to find and may induce a stable appropriate gene silencing, leading to significant cell changes. Aim of the study was to analyze the relationship between methylation of the APC, GSTP1 and RASSF1A genes and total PSA and prostate health index (PHI) in PCa. Material and methods. The present study included 54 patients with suspicion of PCa, up to 75-years old, who had an initial total PSA level from 2.5 to 10 ng/ml. To calculate PHI value the concentrations of total PSA, free PSA and pre-mature form of PSA ([–2]proPSA) in blood serum were measured by chemiluminescence immunoassay. Results and discussion. The study has revealed the statistically significant correlation between the degree of methylation in blood plasma samples and biopsy material of only the GSTP1 gene and PSA-associated markers. We found an increase of parameters contingency as Gleason score increased. Conclusions. As a result of this work, statistically significant direct correlations were identified between changes in methylation patterns of the promoter region of the GSTP1 gene and PHI, which allows us to consider them as potential candidates for inclusion in a diagnostic panel for more effective early detection of prostate cancer.

The study of DNA methylation status in malignant lymphomas is a new field of research in oncohematology. The aim of this study was to quantify the level of methylation of the MIR-143 gene in the tumor tissue of patients with diffuse large B-cell lymphoma (DLBCL). Material and methods. The study included 81 tumor samples of DLBCL (26 of germinal and 55 of non-germinal origin) and 11 biopsies of reactive lymph nodes. To quantify the methylation of the MIR-143 gene, the method of direct bisulfite sequencing by Sanger was used with the calculation of the average level of methylation of the analyzed CpG-sites. Results. The average level of MIR-143 methylation in tumor samples was significantly lower than the values in reactive lymph nodes (64.43 ± 19.92 и 76.27 ± 4.92 %, respectively, p = 0.049), did not depend on the immunohistochemical subtype of the tumor and showed a greater spread of values. In the lymphoma samples, there was predominant hypomethylation of one of the four analyzed CpG-dinucleotides within the boundaries of the analyzed fragment. Conclusion. The data on a change in the pattern of the MIR-143 gene methylation in the tumor tissue of DLBCL were obtained. To establish the role of microRNA in the pathogenesis of DLBCL further studies aimed at clarifying the mechanisms of epigenetic regulation of MIR-143 expression in lymphoma cells and identification of this microRNA targets are required.

A case report of a combination of an aneurysm of the anterior descending artery in the area of the departure of the diagonal branch and two coronary-ventricular fistulas has been described. The patient was stented earlier (in 2019 – the anterior descending artery and diagonal branch and in 2020 – the circumflex artery) for stable angina pectoris. However, in 2022, she was admitted to the hospital with a diagnosis of “ST-segment elevation myocardial infarction” and a coronary angiography revealed thrombosis of both the aneurysm cavity of the anterior descending artery and previously stented segments of the anterior descending artery. As an emergency, the patient underwent provisional stenting with final kissing balloon dilation, as a result of which the lumens of the anterior descending artery and the diagonal branch were completely restored, and the aneurysm cavity was not contrasted due to its embolization by thrombotic masses.

The pandemic of a new corona virus infection (NCVI) has worsened the already unfavorable demographic situation in the Russian Federation. Aim of the study was to assess the changes in the demographic situation in the country and the Siberian Federal District and the causes contributing to them. Material and methods. Statistical data of the Ministry of Health of the Russian Federation, Rosstat, regional ministries of health of subjects belonging to the Siberian Federal District, and literature on the problems of demography were used. The following methods were used: analytical, historical, statistical, including statistical observation, summary and grouping of materials, absolute and relative statistical values, sampling. Results and discussion. The pandemic period of the new coronavirus infection in RF and SFD is characterized by a substantial increase in the mortality rate, which became the maximum in the newest history of Russia, i.e. since 1991. The structure of the main causes of death has changed. Diseases of the circulatory system, neoplasms, diseases of the digestive organs and external causes, accounted for 76.6 % of all causes in 2019, in 2021 they accounted for only 60.1 %, with NCVI taking second place among causes of death (19.1 %). The birth rate remains at a low level, and in 2021 was 9.6 per 1000 population, which is 16.5 % lower than in 2017, due to which the natural decline in population has significantly increased (to –6.3 in Russia and to –7.0 per 1000 population in SFD) and the average life expectancy has decreased. Conclusions. All of the foregoing points to the ineffectiveness of measures to prevent and forestall the adverse effects of the pandemic, which is practically inevitable in the case of new, poorly studied infectious diseases. The measures taken to organize medical care to the population in the conditions of the pandemic have not been adequate. This is evidenced by the higher rates of total mortality of the population, compared to the probable ones (caused by the increase in mortality from NCVI), a significant increase in natural population decline and a reduction in life expectancy.