Maternal diabetes mellitus (DM) is a chronic disease that carries significant risks for the fetus and newborn. Hyperglycemia during pregnancy contributes to the development of structural heart defects, myocardial hypertrophy, and impaired cardiac function in newborns.
The objective of the study was to evaluate the echocardiographic parameters of the cardiac function in children born to mothers with type 1 diabetes mellitus (DM1).
A prospective study of 163 newborns was conducted on the basis of the Republican Scientific and Practical Center “Mother and Child”. The children were divided into 2 groups. The main group consisted of 107 children born to mothers with DM1 (Gr1), the control group – 56 healthy infants born to women with normoglycemia during pregnancy (Gr2).
It was found that a newborn in Gr1 has a larger thickness of the interventricular septum (IVS) (p < 0.001), the posterior wall of the left ventricle (p < 0.001), and the size of the right ventricle (p < 0.001). It was revealed that in Gr1 the frequency of myocardial hypertrophy with an interventricular septum thickness of 5 mm or more is 30.8 %, which is statistically significantly higher in comparison with Gr2 (1.8 %, F = 0.115, p < 0.001). When assessing the blood flow using a pulse-wave Doppler study, the manifestations of the diastolic dysfunction in Gr1 were revealed. The E/A ratio for the   flow through the mitral valve in Gr1 was 0.9 (0.8–1.1), in Gr2 – 1.2 (1.0–1.4), p = 0.043. The study confirmed a lower frequency of registration of myocardial hypertrophy with good glycemic control during pregnancy (p < 0.05). Direct correlations between the average level of glycated hemoglobin in mothers and the IVS thickness (r = 0.374, p < 0.05) and the posterior wall of the left ventricle (r = 0.293, p < 0.05) of their newborns were observed in infants in Gr1.
The use of pump insulin therapy in pregnant women with type 1 diabetes allowed a statistically significant reduction in the frequency of hypertrophy of the left ventricle in infants in the neonatal period.
Diabetes mellitus type 1 in the mother determines not only the risk of congenital heart defects, but also hypertrophic changes in the myocardium, contributes to the diastolic dysfunction in this group of children. The achievement of target levels of glycated hemoglobin during pregnancy, using pump insulin therapy, provides a lower frequency of registration of ventricular septal hypertrophy. The revealed statistically significant differences in the IVS thickness and the posterior wall of the left ventricle in infants born to mothers with type 1 diabetes should be taken into account by doctors in the system of organizing medical care in inpatient settings and at the stage of dispensary observation.

The changes in the parameters of oxidative stress, energy metabolism, and redox potential of the glutathione system in the rat brain following cerebral ischemia were studied. To correct metabolic disorders, the pantothenic acid derivatives were used in combination with precursors of glutathione biosynthesis and selenium substances.
Cerebral ischemia was modeled by ligating the both common carotid arteries in rats for 2 h. Drugs were administered i.p. in the following doses: panthenol – 400 mg/kg, N-acetylcysteine – 150, nanoselen – 1 mg/kg, three times: 1 h before ligation of the carotid arteries, at the time of ligation and 1 hour after ligation. We showed that the development of oxidative stress caused by ischemia is accompanied by the changes in the parameters of energy metabolism and the pentose phosphate pathway in the cerebral hemispheres. Simultaneously, there are a decrease in the GSH level, an increase in the GSSG content, a decrease in the GSH/GSSG ratio, and the activation of enzymes of redox transformations of glutathione.
The redox potential of the glutathione system decreases and shifts towards oxidation, while the level of S-glutathionylated proteins increases. Thus, the value of the GSH/GSSG ratio and the protein glutathionylation intensity are the sensitive indicators of the redox potential in the brain tissue and can be used as markers of the extent of changes in the redox balance. The panthenol injection to animals leads to a decrease in the content of free radical oxidation products, violations of oxidative phosphorylation and restoration of thiol-disulfide balance in the brain. When panthenol is administered together with N-acetylcysteine and nanoselen, the corrective effect of panthenol is enhanced.

The objective of the study was to evaluate the results of Ruthenium-106 (¹⁰⁶Ru) + Rhodium-106 (¹⁰⁶Rh) brachytherapy in uveal melanoma (UM) patients.
The data for the period 2001–2018 were taken from the Belarusian Cancer Registry and medical records of patients with clinically diagnosed uveal melanoma who received treatment at the N. N. Alexandrov National Cancer Centre of Belarus. A total of 383 patients were included in the study. ¹⁰⁶Ru + ¹⁰⁶Rh β-ophthalmic applicators were used for brachytherapy (BT). The calculated dose to the tumor apex was 120–130 Gy, while the reduced 100–110 Gy was administered to tumors close to the optic nerve. To analyze the treatment outcomes, patients were divided into three groups based on a basal diameter of a tumor.
Out of a total 383 patients, complete tumor resolution was observed in 282 (73.6 %), tumor stabilization was present in 76 (19.8 %). Continued tumor growth and tumor relapse were observed in 34 (9.13 %) and 50 (13.05 %) patients, respectively. 59 (15.1 %) patients underwent enucleation. The metastatic disease developed in 47 (12.3 %) cases. BT adverse effects were observed in 21.3 % cases. The relapse-free survival in the group of patients with a basal tumor diameter of up to 9 mm was 76.0 ± 6.3 %, which was higher than that in the groups with a large basal diameter (p = 0.002). Over a 15-year follow-up period, almost half of the patients (52.2 ± 15.6 %) with a tumor base of more than 12 mm relapsed.
Considering the high rates of the continued tumor growth during treatment in patients with a basal tumor diameter of more than 12 mm, combined therapy must be used in this group.

A new scientifically substantiated method for determining the left ventricle (LV) diastolic dysfunction (DD) in chronic heart failure (CHF) is based on the concept of a comprehensive assessment of the leading pathofunctional and hemodynamic mechanisms of development and progression of LV DD and CHF, global heart remodeling and contains the first developed diagnostic criteria obtained on the basis of 2D Speckle Tracking echocardiography. The method has a high diagnostic efficiency: the determination accuracy of LV DD types in an independent examination sample of patients with CHF with the less than 50 % preserved ejection fraction (EF) and LV EF was 98.5 %.

The efficacy and long-term outcomes of the procedure of guided tissue regeneration depend on the basic morphometric condition of the defect and the choice of the technical supplement and the technical approach to surgery. Hystoarchitectonics of defects can be presented as a simplified four-parameter classification for use in clinical and expert practice in addition to making decisions in the regenerative surgery of defects in the periodontal and alveolar ridge.

Based on the data of the Belarusian Cancer Register for 2000–2019 the dynamics and structure of incidence of mesothelioma in the Republic of Belarus are studied. We calculated incidence rates, age-standardized incidence rates, taking into account the gender and place of residence of patients, cumulative risk. The analysis of the structure was carried out both for the whole population and separately for men and women, as well as for the urban and rural population.
We detected that the incidence rates of malignant mesothelioma in the Republic of Belarus are significantly lower than those in the Western Europe region and the Central and Eastern European region. For the period from 2000 to 2019 the dynamics of the incidence rates of mesothelioma in the Republic is characterized by a moderate tendency to decrease, and in the general structure of the incidence rate both among men and among women, pleural mesothelioma is the dominant localization. The population of regions where asbestos-cement manufacturing is located has no higher risk of developing malignant mesothelioma in comparison with population levels.
The estimated incidence of mesothelioma in men is 2 times higher than the incidence of women, and this excess is independent of age differences between these two populations. The highest incidence rates for men are observed at the age of 75–79 years, while the peak incidence for men living in the city falls at the earlier age – 70–74 years. Among women living both in the city and in rural areas, the peak incidence falls at the age of 80–84 years.

The objective of the study was to identify predictive biomarkers and generate the model to predict placental lesions in women with varicose veins. We collected serial serum specimens from 128 women with varicose veins between 22 and 24 weeks’ gestation. The investigation includes ultrasound findings, blood analysis of endothelin-1, vascular endothelial growth factor (VEGF), CRP, coagulation factors as well as BMI. We used machine learning algorithm and multivariable logistic regression with Lasso method to predict placental lesions among the pregnant patients with varicose veins.
A total of 47 (36.7 %) women with varicose veins subsequently developed placental insufficiency. Mean serum VEGF were higher in women who developed placental insufficiency – 29 (27–31) pg/ml, as compared with women without varicose disease – 24 (22–25) pg/ml, p < 0.001. The performance of the model trained with all the most valuable tests (VEGF, endothelin, CRP, D-dimers, fibrinogen, CEAP class) is admissible (AUC 0.94; CI 0.842–0.956; p < 0.001).
We identified novel combination of clinical and laboratory predictive markers that provide pathophysiological insights and could help future improvements of diagnosis and treatment of placental lesions in women with varicose veins.

The aim of the study, performed on 65 Wistar rats, was to develop a new model and, as an example, use it to identify the extent to which quercetin and the quercetin-2-hydroxypropyl-β-cyclodextrin nanocomplex, applied to the wound, affect the engraftment of skin autografts. Grafts were obtained from the ear shells of animals, and graft’s survival rate was assessed by the degree of inhibition of wound contraction. It is shown that the latter depends on the area of grafts and the time after which they were located on the wound surface after its creation. It was shown that quercetin worsens, and quercetin-2- hydroxypropyl-β-cyclodextrin does not impair the ability of the wound surface to accept the graft.

A quantitative assessment of the antibacterial effect of silver nanoparticles on polyantibiotic-resistant grampositive and gram-negative microorganisms was carried out. Silver nanoparticles were synthesized by the environmentally friendly metal-steam synthesis method. The size and electronic state of nanoparticles were investigated by transmission electron and X-ray photoelectron spectroscopy. The antibacterial properties of nanomaterials were assessed on two clinical pathogenic strains of gram-positive and four strains of gram-negative microorganisms. The typing and assessment of bacterial resistance to antibiotics were carried out on a microbiological analyzer. The antibacterial effect of nanoparticles was quantitatively assessed using the dilution method and the determination of the minimum inhibitory and minimum bactericidal concentrations.
It was found that the studied silver nanoparticles have sizes in the range from 5 to 24 nm with an average diameter of 10.8 nm. It was shown that all clinical strains of microorganisms used in the study are characterized by multiple antibacterial resistance; the percentage of their antibiotic resistance ranges from 12.5 to 93.3 %. It was found that for the studied microorganism, the values of the minimum inhibitory concentration (MIC) are in the range from 7.81 to 31.25 μg/ml, and the minimum bactericidal concentration (MBC) is in the range from 31.25 to 62.50 μg/ml.
The obtained MIC and MBC data can be used to create promising antimicrobial drugs and medical next generation devices.

Ascites occurs in about 60 % of patients with cirrhosis within 10 years of diagnosis. Laparocentesis is the preferred first-line therapy in patients with cirrhosis and massive tense ascites, allowing more than 5–6 liters of ascitic fluid to be removed at one time. The search for informative prognostic factors and the development of a method for predicting unfavorable outcomes of repeated laparocenteses in patients with ascites are relevant to timely refer this contingent of patients to perform TIPS.
The purpose of the study was to develop and evaluate the diagnostic significance of a model for determining the probability of unfavorable outcomes of laparocentesis in patients with ascites on the background of liver cirrhosis.
The results of treatment of 99 patients with the ascitic syndrome associated with intrahepatic portal hypertension were studied. The multiple regression analysis using the binary response logit model was carried out to calculate the prediction models.
The analysis of the treatment results of patients with liver cirrhosis and ascites by the laparocentesis method revealed a number of factors that influence the onset of an unfavorable outcome. 2 models with the inclusion of initial variables are the most promising for forecasting. Model A includes: patient weight, serum-ascites total protein gradient, hyponatremia; model B: MELD-Na score, serum-ascitic total protein gradient, patient weight. The developed prediction method is highly informative, effective, easily applicable, and can be widely used in clinical practice.
The ability to predict an unfavorable outcome in patients with portal hypertension and ascites after laparocentesis allows for a personalized approach in the process of timely selection of more effective, but also more expensive treatment methods, such as TIPS, which will help us to increase the therapy effectiveness and the survival of this cohort of patients.

More than 20–25 % of patients with acute leukemia underwent transplantation of HSC from HLA-identical sibling or unrelated donor had relapse.
Therefore, the purpose of this study was to evaluate the influence of different factors on the risk of post-transplantation relapse in children and teenagers with acute lymphoblastic leukemia (ALL).
The gender, the age of a donor at the time of transplantation; the gender, the age of a recipient at the time of transplantation; the type, the number of relapses of previous HSCTs; the type of conditioning; the type of transplantation; the source of stem cells; transplant parameters; the acute (aGVHD) and chronic (cGVHD) graft-versus-host disease or its absence; the KIRalloreactivity of donor NK cells were estimated as risk factors for the disease relapse in our study.
We established that the recipient’s age of less than 4 years at the time of transplantation (p = 0.0042); the time of relapse (very early and early) (p = 0.0047); the absence of aGVHD (p = 0.0183) or cGVHD (p = 0.0384) have been the important factors for the disease relapse of patients with ALL after allogeneic HSC transplantation.