Репозиторий Университета

© 2021, The Author(s). Background: Non-steroidal anti-inflammatory drugs such as aspirin are used for the treatment of cardiovascular disease. Chronic use of low-dose aspirin is associated with the occurrence of gastric ulcer. The aim of this study was to investigate the healing potential of Lycium barbarum polysaccharides (LBP) from Chinese Goji berry and C-phycocyanin (CPC) from Spirulina platensis on gastric ulcer in rats. Methods: Male Sprague–Dawley rats were divided into five groups: normal, aspirin (700 mg/kg bw), LBP (aspirin + 100 mg/kg bw/d LBP), CPC (aspirin + 50 mg/kg bw/d CPC), and MIX (aspirin + 50 mg/kg bw/d LBP + 25 mg/kg bw/d CPC) groups. Gastric ulcer was developed by daily oral feeding of aspirin for 8 weeks. Treatments were given orally a week before ulcer induction for 9 weeks. Results: The MIX group elevated gastric cyclooxygenase-1, prostaglandin E2, and total nitrite and nitrate levels by 139%, 86%, and 66%, respectively, compared with the aspirin group (p < 0.05). Moreover, the MIX group reduced lipid peroxides malondialdehyde levels by 78% (p < 0.05). The treatment of LBP and/or CPC increased gastric Bifidobacterium relative abundance by 2.5–4.0 times compared with the aspirin group (p < 0.05). Conclusions: We conclude that combined LBP and CPC enhance gastroprotective factors, inhibit lipid peroxidation, and increase gastric Bifidobacterium relative abundance. Combined LBP and CPC have protective potential against gastric ulcer caused by aspirin in rats.

© 2021, The Author(s). Background: Non-steroidal anti-inflammatory drugs such as aspirin are used for the treatment of cardiovascular disease. Chronic use of low-dose aspirin is associated with the occurrence of gastric ulcer. The aim of this study was to investigate the healing potential of Lycium barbarum polysaccharides (LBP) from Chinese Goji berry and C-phycocyanin (CPC) from Spirulina platensis on gastric ulcer in rats. Methods: Male Sprague–Dawley rats were divided into five groups: normal, aspirin (700 mg/kg bw), LBP (aspirin + 100 mg/kg bw/d LBP), CPC (aspirin + 50 mg/kg bw/d CPC), and MIX (aspirin + 50 mg/kg bw/d LBP + 25 mg/kg bw/d CPC) groups. Gastric ulcer was developed by daily oral feeding of aspirin for 8 weeks. Treatments were given orally a week before ulcer induction for 9 weeks. Results: The MIX group elevated gastric cyclooxygenase-1, prostaglandin E2, and total nitrite and nitrate levels by 139%, 86%, and 66%, respectively, compared with the aspirin group (p < 0.05). Moreover, the MIX group reduced lipid peroxides malondialdehyde levels by 78% (p < 0.05). The treatment of LBP and/or CPC increased gastric Bifidobacterium relative abundance by 2.5–4.0 times compared with the aspirin group (p < 0.05). Conclusions: We conclude that combined LBP and CPC enhance gastroprotective factors, inhibit lipid peroxidation, and increase gastric Bifidobacterium relative abundance. Combined LBP and CPC have protective potential against gastric ulcer caused by aspirin in rats.

© 2019 Elsevier B.V. Human populations are chronically exposed to mixtures of toxic chemicals. Predicting the health effects of these mixtures require a large amount of information on the mode of action of their components. Xenobiotic metabolism by bacteria inhabiting the gastrointestinal tract has a major influence on human health. Our review aims to explore the literature for studies looking to characterize the different modes of action and outcomes of major chemical pollutants, and some components of cosmetics and food additives, on gut microbial communities in order to facilitate an estimation of their potential mixture effects. We identified good evidence that exposure to heavy metals, pesticides, nanoparticles, polycyclic aromatic hydrocarbons, dioxins, furans, polychlorinated biphenyls, and non-caloric artificial sweeteners affect the gut microbiome and which is associated with the development of metabolic, malignant, inflammatory, or immune diseases. Answering the question ‘Who is there?’ is not sufficient to define the mode of action of a toxicant in predictive modeling of mixture effects. Therefore, we recommend that new studies focus to simulate real-life exposure to diverse chemicals (toxicants, cosmetic/food additives), including as mixtures, and which combine metagenomics, metatranscriptomics and metabolomic analytical methods achieving in that way a comprehensive evaluation of effects on human health.

© 2018 Dynasty Publishing House. All rights reserved. Post-partum depression arises following pregnancy and childbirth, it is a severe disorder threatening the wellbeing of both mother and baby. In the affected families, there is a higher risk of the child's impaired emotional, social and cognitive development. Post-partum depression is one of the most common complications of the postnatal period. The disease prevalence varies from 6.5 to 12.9% and more in countries with low and middle levels of income and life. We analysed 62 Russian and worldwide literature sources published in the PubMed, Google Scholar databases and in Russian medical periodicals over the period 2002-2017 on this theme, we also translated the original Edinburgh Postnatal Depression Scale. This systematic review presents current ideas of the causes of postpartum depressions, methods of treatment and prevention.

© Bionika Media Ltd. The literature data on the study of the microbiota of female genital organs and assess the clinical and microbiological characteristics of the probiotic strain LCR35, used in the treatment and prevention of vaginal infections were analyzed. Biotherapeutic aspects of treatment and prevention of dysbiotic conditions of vaginal microbiota have been analyzed. A comparative evaluation of the characteristics and requirements of lactobacillicontaining preparations with probiotic activity in obstetric-gynecological practice was carried out. The clinical and microbiological advantages of the original probiotic strain Lactobacillus casei rhamnosus Doderleini (LCR35) in the formulation Lactogynal in the treatment and prevention of vaginal infections were noted. The literary review of data the medical use of the culture of Lactobacillus casei rhamnosus Doderleini (LCR35) testifies to the expediency and validity of its use in the mode of two-stage therapy of the dysbiotic conditions of the vagina. Organization and conduct of additional post-registration clinical studies of medicinal product for medical use Lactogynal will strengthen the position of targeted probiotics in the complex treatment and prevention of bacterial and fungal infections of female genital organs.

© 2018 Izdatel'stvo Meditsina. All rights reserved. Anthropogenic physical, chemical, and biological impacts of objects on living organisms in the environment lead to profound structural and functional disorders primarily in the evolutionary current microbiocenosеs of a human. This is often accompanied by a deterioration in his health, an increase in the risk of infectious, chronic metabolic and mental diseases, which eventually can put a question for not only the preservation on our planet but also the entire existing diversity of living organisms. The development of cryobiotechnology and the creation of cryobanks of different directions is a common global trend in the development of Biological, Medical, Agricultural and Environmental Sciences. The advantage of the proposed technique of cryopreservation of symbiotic microbial associations is the storage of the biomaterials taken from the people will be carried out in an atmosphere of liquid nitrogen (-196°C) for the long-term storage. Fundamental and applied research on cryopreservation of microbiota of different human biotopes has a social orientation because they are directly related to human ecology and health of the nation.

© 2018 Media Sphera Publishing Group. All rights reserved. The review analyzes the main etiological and pathogenetic mechanisms of the development of NSAID-enteropathy. Particular attention is paid to the role of intestinal microbiota in the manifestation and progression of NSAID-enteropathy. The special role of probiotics in the prevention and treatment of NSAIDs enteropathy is considered.

© 2018 Techno-Press, Ltd. In order to prevent the phenomena of "microbiological genocide", unjustified and unfavorable violations in microecological systems, and, first of all, human microbiota during the implementation of the disinfection prevention of diseases, the necessity for the scientific justification and practical provision of sufficient antimicrobial selectivity of disinfecting effects, is substantiated in the article. It is necessary to decode and take into account the susceptibility of different microbe pathogens to various disinfectants in comparison with saprophyte, and even more so, useful microflora.

© 2018, Nizhny Novgorod State Medical Academy. All rights reserved. Persistent bronchial inflammation in chronic obstructive pulmonary disease (COPD) is considered the cause of ventilation disorders and related contamination with conditionally pathogenic microorganisms; the latter can proceed and transform into a full infection, which can aggravate and exacerbate COPD. The aim of the study was to evaluate the relations between the oropharyngeal microbiota in patients with COPD and the clinical, functional, and prognostic parameters of the disease. Materials and Methods. 64 patients with COPD were included in the study; the participants were scheduled to visit our clinic on two occasions. In the first visit, their medical history was studied in detail and the major examination procedures were conducted. Those included an assessment of the respiratory function, the 6-minute walk test, the degree of dyspnea by the Medical Research Council scale, body plethysmography, the diffusion capacity of the lungs, and a chest CT scan. The second visit took place 12 months after the first one to assess the changes in the course of the disease. The result was considered negative if, in the second examination, the patient‘s condition was found more severe. Oropharyngeal samples of all patients were sequenced to identify the V3–V4 variable sites of the 16S rRNA gene. Results. It is found that the microbiological oropharyngeal patterns in COPD patients depend on the source of micro-aspiration. In addition, the changes in the oropharyngeal microbiota correlate with the severity and prognosis of the disease, as well as the patient phenotype. Based on the data obtained by sequencing parts of the 16S rRNA gene, the role of oropharyngeal microbiota in determining the course and prognosis of COPD has been elucidated. Conclusion. The presented clinical and functional characteristics associated with oropharyngeal microbiota indicate that microaspirations from other body compartments not only affect the composition of oropharyngeal microbiota in patients with COPD but also have an important prognostic significance.

© 2018, Dynasty Publishing House. All rights reserved.  Objective: to evaluate the possibility of creating a human model of acute Helicobacter pylori infection in healthy volunteers after infecting them with a mutant rifampicin-resistant strain of H. pylori KM-11 (Rif R ), to obtain evidence of H. pylori survival and invasion into the gastric mucosa, describe the symptoms, and assess the efficacy of H. pylori eradication therapy with Stimbifid plus. Materials and methods. In our experiments, we used conventional white mice of both genders weighing 18–20 g. The concentration of bifidobacteria, lactobacilli, and Escherichia (CFU) in animal faeces was determined by inoculating tenfold dilutions of biomaterial onto solid media and further counting of bacterial colonies grown after the incubation period. Microorganisms were cultivated in an anaerobic incubator and then identified by morphological evaluation and using biochemical identification kits. We created a murine model of H. pylori infection by oral administration of H. pylori KM-11 (Rif R ) suspensions to immunocompromised mice that had earlier undergone intramuscular administration of dexamethasone. For a human model of H. pylori infection, we selected healthy male volunteers. They took suspensions of H. pylori KM-11 (Rif R ) isolates in isotonic sodium chloride solution. Fecal specimens were collected from volunteers on daily basis during the entire follow-up period and then 2 weeks and 1 month after treatment completion. Fecal suspensions in isotonic sodium chloride solution were inoculated onto the selective hemin-containing solid media with rifampicin at a concentration of 160 µg·mL –1 . The results of this experiment (H. pylori colony count) were used to evaluate the efficacy of H. pylori eradication therapy with Stimbifid plus. Results. Both in vitro experiments and murine models demonstrated high anti-H. pylori activity of Stimbifid plus and its ingredients, restoration of the gastric microbiota, restoration of gastric colonization resistance, and eradication of H. pylori KM-11 (Rif R ). Self-infection with H. pylori KM-11 (RifR) caused acute infection in volunteers. The disease manifested with mild ailment, epigastric discomfort, belching, increased stool frequency, and changes in the color of stool. The detection of H. pylori KM-11 (Rif R ) in the faeces of volunteers and isolation of pure cultures prior to treatment initiation indicated bacterial adhesion to gastric mucosa and survival of microorganisms. Treatment with Stimbifid plus caused gradual decrease in the number of bacteria isolated from feces and their complete elimination by day 11 of therapy. All fecal specimens collected 2 weeks and 1 month after therapy completion from volunteers were negative for H. pylori KM-11 (Rif R ). None of the study participants required in-patient treatment. Conclusion. The results of our experiments obtained in both murine and human models of H. pylori infection will be used for more detailed assessment of this pathological process, clinical manifestations, impact of H. pylori virulence factors on the host, choosing new methods for the prevention and treatment of chronic gastritis caused by H. pylori, and monitoring the efficacy of eradication therapy.

© 2018, Dynasty Publishing House. All rights reserved. Objective: to assess diagnostic value of serological tests for Helicobacter pylori detection and to evaluate its feasibility in pediatric gastroenterology. Patients and methods. This study included 850 children aged between 2 and 17 years undergoing inpatient treatment in the Department of Gastroenterology. Participants were diagnosed with chronic gastritis, duodenitis, or esophagitis. All patients underwent a comprehensive examination that included standard blood tests, urine tests, stool tests, fibroesophago and abdominal ultrasonography. H. pylori infection was diagnosed using both invasive and non-invasive methods. Results. Stool tests for H. pylori were positive in 43% of children, which is lower than the estimated infection rate in the Russian population (60%–80%). Analyzing the sensitivity and specificity of various methods for H. pylori detection, we found that the HELPIL test, based on determinig urease activity in the gastric biopsy, was the most accurate one among those evaluated. Serological detection of H. pylori-specific IgM antibodies demonstrated low sensitivity and specificity (32%). However, the analysis of the test results in various age groups showed that this test is highly-sensitive (97%) in children under the age of 6 years. Conclusion. Our findings can be explained by age-related characteristics of the immune response and by the fact that colonization of the gastrointestinal mucosa by H. pylori in children occurs during the development of immunological tolerance to microbiota, which limits inflammatory responses to H. pylori and promotes long-term persistence of bacteria in mucous membranes resulting in chronic inflammation. We recommend paying attention to age-related characteristics of the immune response when choosing a diagnostic option.

© 2018 Media Sphera Publishing Group. All rights reserved. The review gives the definition and conditions of assigning a biological agent to probiotics, the mechanisms of action of probiotics and microbiota on the activity of the central nervous system, as well as the main biologically active amines synthesized by the microbiota. It considers the neuroendocrine effects of probiotics and microbiota and their role in the pathogenesis of obesity and diabetes. The authors summarize the studies that prove the impact of the microbiota on metabolic processes via synthesis of vitamins B and D and the ensuing prospects for their therapeutic application.

© 2018 Stavropol State Medical University. All rights reserved. The review presents data on the relationship of intestinal dysbiosis with irritable bowel syndrome (IBS) and the possibility of modulation of the intestinal microbiota (MB) in IBS therapy. It is shown that imbalance of MB caused by the influence of diet, antibiotics or other exogenous factors leads to gastrointestinal disorders, in particular, to the development of IBS. The data are presented that the modulation of MB with the help of prebiotics, antibiotics, probiotics and fecal microbiota transplantation has a positive therapeutic effect in patients with IBS.