Basic stages of creation, development and spreading of academician L. A. Orbeli scientific school at Petrograd - Leningrad were traced. Significance of main scientific researches of this school in the physiology for the development of adjacent areas of medicine and biology was shown.

Article presents current data on the contribution of the human microbiota to the development of oncological conditions, microbial impact on cell transformation, influence on chemotherapy outcome. Brief description of the methods used for studying microbiota in carcinogenesis as well as prospects of creating non-invasive diagnostic tools is given.

According to the literature review, the use of modern endoscopes with high resolution and a narrow-band imagine function with optical magnification, as well as autofluorescence, chromoscopy, endosonography, makes it possible to establish a diagnosis of early colorectal cancer with a high degree of accuracy. Nowadays, endoscopic submucosal dissection and endoscopic mucosal resection are the methods of choice in the treatment of early (Tis, T1sm1N0M0) colon cancer.

Currently, bariatric (metabolic) surgery is the main effective treatment of obesity and associated pathological conditions. The features of the course of obesity as a chronic progressive disease, heterogeneous etiology, clinical manifestations and a steady increase in number of patients worldwide make the problem of bariatric interventions extremely urgent. The article presents the analysis of modern data concerning the choice of the method of surgical benefits in patients with obesity and their own clinical experience.

Introduction. Cytochrome C in mitochondria transfers electrons from complex III to complex IV, and it is a signaling molecule in the apoptosis realization.

The objective was to evaluate the level of cytochrome C in cell mitochondria in various organs of female mice with standard and stimulated growth of experimental B16/F10 melanoma.

Methods and materials. The experiment was performed on female C57BL/6 mice (n=168). The groups were: intact animals (n=21); controls with a model of chronic neurogenic pain (CNP) (n = 21); group M — standard B16/F10 melanoma transplantation (n=63), group CNP + M — B16/F10 melanoma transplantation 3 weeks after CNP model creation (n=63). The level of cytochrome C (ng / mg protein) were measured by ELISA (Bioscience, Austria). Statistical analysis of results was performed using the «Statistica 10.0» program.

Results. After 1 week of standard melanoma growth, an increase in the level of cytochrome C by 2.7 and 1.7 times was detected in mitochondria of the brain and liver; by the 3rd week, it decreased in the liver and skin by 1.7 times. In melanoma mitochondria, the level of cytochrome C was lower than in the skin of intact animals: by 2.5 times after week 1, by 4.5 times after week 2, and by 4.6 times after week 3. After 1 week of stimulated melanoma growth, the level of cytochrome C decreased compared control values: by 2.2 times in the brain, by 1.9 times in the liver, by 1.4 times in the skin; by week 3, it decreased by 4.8 times in mitochondria of the brain, by 4.7 times — in the liver, by 2.3 times — in the heart, by 1.9 times — in the skin. In melanoma mitochondria, the level of cytochrome C was lower than in the skin of intact animals: by 15.3 times after week 1, by 10.3 times after week 2, and by 8.8 times after week 3.

Conclusion. Low level of cytochrome C were found in melanoma mitochondria in standard and stimulated tumor growth. The data can be used in the experiment and in clinic for using exogenous cytochrome C as an agent slowing down the malignant process.

The objective was to determine the most significant categories of ICF that allow us to provide objective information about the biopsychosocial state of patients who have suffered a new coronavirus infection COVID-19 and to choose the most effective methods of rehabilitation based on the rehabilitation diagnosis of each group of patients.

Methods and materials. On the basis of the clinic of the Pavlov University, a course of medical rehabilitation was conducted for 2 weeks for patients who had suffered a new coronavirus infection in severe and moderate degree of course. 2 groups were formed: EG1-25 people participating in the rehabilitation program with the use of physical exercises and EG2 — 39 people with the use of physical exercises and physiotherapy. A categorical rehabilitation profile of patients by ICF domains was compiled.

Results. As a result of the application of the medical rehabilitation program, a statistically significant improvement in the indicators in EG 2 was revealed. The respiratory function (the Barbell test) improved by 14.6%, the functional state of the cardiovascular system according to the DBP indicator by 3.9%. The analysis of the results of the ICF category «activity and participation» revealed a statistically significant improvement in the motor test parameters (6MSHT) in both groups: by 11.9 % in EG2 and by 20.6 % in EG1.

Conclusions. The results of the study indicate the positive impact of the proposed program of medical rehabilitation and confirm the relevance of the problem, unsolved problems and prospects for scientific research on this topic.

Introduction. Sinusoidal obstructive syndrome (SOS)/veno-occlusive liver disease (VOD) is one of the most dangerous complication of allogeneic hematopoietic stem cell transplantation (alloHSCT).

The objective of our study was to analyze risk factors associated with SOS/VOD in children and adults after alloHSCT.

Methods and materials. The study included 76 patients who were diagnosed with the development of SOS/VOD after alloHSCT performed in Raisa Gorbacheva Memorial Research Institute for Pediatric Oncology, Hematology and Transplantation between 2001 and 2019. 25 patients (32.9 %) were younger than 18 years, 51 patients (68.1 %) — 18 years and older. Among them, 17 patients were treated with defibrotide at a dose of 25 mg/kg per day, median therapy duration — 21 day.

Results. One-year overall survival (OS) was significantly higher when partial and complete response to the therapy was achieved — 45 %, than when there was no response — 0 % in the general group (p = 0.001). According to the results of multivariate analysis of unrelated alloHSCT HR 2.040 (95 %CI 1.112-3.744, р = 0.021), acute GVHD HR 0.496 (95 % CI 0.272-0.903, р = 0.022), moderate/severe SOS/VOD HR 2.423 (95 % CI 1.298-4.524, p = 0.005) statistically significantly influenced the 1-year OS. Defibrotide and accompanying therapy did not significantly influence the 1-year OS in children and adults (n=76) - 53 % and 54 % (p=0.86), respectively. In a multivariate analysis. unrelated alloHSCT HR 8.172 (95 %CI 2.176-30.696, р=0.002) and moderate and severe SOS/VOD HR 9.077 (95 % CI 2.425-33.978, р=0.001) significantly influenced the 1-year OS in the pediatric group.

Conclusion. The understanding of risk factors of adverse prognosis in patients SOS/VOD facilitates selection of patients who will benefit the most from therapy with defibrotide. Early administration of defibrotide in the course of VOD/SOS is crucial to achieve response.

Introduction. Uncontrolled bronchial asthma (BA) increases risk of hospitalizations, future exacerbations and decreases quality of life; factors improving the probability to achieve BA control are under study.

Methods and materials. The open prospective study included 104 patients of three groups: children (6—11 years, n=38), adolescents (14—17 years, n = 35) and adults (25 — 50 years, n = 31). Inclusion criteria: BA duration >12 month, uncontrolled asthma, absence of acute respiratory infection for 14 days. Clinical history, respiratory function and sampling (serum and nasal brushings) for periostin assay were performed on Visit 1. Maintenance therapy correction and triggers avoiding recommendations were made. Two further visits 6 months apart were done. Statistical processing included ANOVA (Kruskall — Wallis test) and Pearson correlation test. Differences were considered significant when p<0.05.

Results. 75 % of «Children» group,70.6 % of «Adolescents» and 53.6 % of «Adults» had achieved BA control. Obesity, non-atopic phenotype, FEV1 <65 % of predicted were risk factors of uncontrolled BA. Serum periostin levels were highest in uncontrolled BA subgroup, Me [Q25; Q75] =32.9 [28.6; 39.1] ng/ml. Nasal periostin levels were highest in «Adolescent» group: 9.8 [4.8; 11.2] ng/ml. Nasal periostin and low FEV1 had moderate reverse correlation (r=—0.61).

Conclusion. Serum and nasal periostin levels could indicate treatment efficacy and prognose future risks of BA control loss.

Malassezia spp. is a commensal yeast that represents normal microflora in humans and some animals. However, Malassezia spp. can cause life-threatening invasive mycosis. Evidence on Malassezia spp. infections is limited mostly to a case reports describing disease in newborns and premature infants, because lipid infusions (total parenteral nutrition) given through central venous catheter is a major risk factor. Here, we report two cases of CNS infection caused by Malassezia species in non-neonates with acute leukemia.