Digital technologies in the system of teaching students at the university

The study aims at identifying the role of the digital technologies in the system of teaching students at the university. The following methods were used in the study: testing, questioning, analysis of performance results, mathematical methods of data processing, etc. Methods for diagnosing learning motivation and emotional attitude to learning, studying the levels of formation of students’ cognitive interests (author’s method), a questionnaire for assessing students’ knowledge in the field of research activities were applied as well. The data of the students’ final progress in subjects were also analysed. An analysis of the main results of the study allows us to conclude: students who were asked to use digital technologies in teaching showed significant differences before and after the experiment on all scales of the study (the learning motivation level, the cognitive interest level, the knowledge level in the research activities field, assessment of the final performance in subjects). The analysis of the results also showed that according to all the data obtained at the stage of the control experiment, the reliability of the differences in the conclusions of the experimental and control groups on all scales of the study is confirmed

СОДЕРЖАНИЕ ЭССЕНЦИАЛЬНЫХ И УСЛОВНО ЭССЕНЦИАЛЬНЫХ ХИМИЧЕСКИХ ЭЛЕМЕНТОВ В ИНТРАОПЕРАЦИОННЫХ БИОПТАТАХ ДЕТЕЙ С ВРОЖДЕННЫМИ ПОРОКАМИ СЕРДЦА И АРИТМИЕЙ

Background. Despite recent numerous studies, etiopathogenesis, treatment and rehabilitation of children with heart rhythm disorders haven’t been studied well. We paid attention to the significant impact of mineral nutrients on cardiac activity, while addressing to the viable solutions. Aim. To measure the levels of essential and conditionally essential mineral nutrients and to determine any relationships between their concentrations in hair and in the intraoperative biopsy specimens obtained from children with congenital heart disease and heart rhythm disorders. Methods 55 children (34 boys and 21 girls) aged 6 to 17 years with different heart rhythm disorders and congenital heart disease were included in the study. Levels of 15 essential mineral nutrients (calcium, potassium, magnesium, sodium, phosphorus, sulfur, chromium, copper, iron, iodine, cobalt, manganese, molybdenum, selenium, zinc) and 3 conditionally essential nutrients (boron, silicon, vanadium) were measured in hair and in the intraoperative biopsy specimens obtained from children with congenital heart disease using inductively coupled plasma atomic emission spectrometry and electrothermal atomization atomic absorption spectrometry. The results of the study were processed using variational and alternative statistic methods with the commercially available software “MedStat”. Results The lack of essential nutrients (K, Mn, Se, Cr, P, Co, S, Cu, Na, Mo) and conditionally essential mineral, Si, in the intraoperative biopsy specimens of the heart and great arteries has been found. The direct strong correlation between the levels of essential (K, Mn, Se, Cr, Co) and conditionally essential (Si) minerals in hair and heart tissues of children with congenital heart disease and heart rhythm disorders has been determined. Conclusion The deficit of essential (potassium, manganese, selenium, chromium, phosphorus, cobalt, sulfur, copper, sodium, molybdenum) and conditionally essential (silicon) mineral nutrients, and the direct strong correlation between their levels in hair and heart tissues of children with congenital heart disease and heart rhythm disorders allows using hair as a biosubstrate, which is highly informative for the measurement of nutrients in the human body. Актуальность. Несмотря на многочисленность проводимых исследований, особенно в последнее десятилетие, до настоящего времени ряд аспектов этиопатогенеза, лечения и реабилитации детей с нарушением ритма сердца (НРС) остаются не изученными. В поиске возможных путей решения ряда задач нами было обращено внимание на существенную значимость химических элементов (ХЭ) в обеспечении деятельности сердечно-сосудистой системы. Цель. Оценить содержание и выявить взаимосвязь между концентрацией эссенциальных и условно эссенциальных химических элементов в волосах и в интраоперационных биоптатах детей с ВПС и аритмией. Материалы и методы Обследованы 55 детей (34 мальчика и 21 девочка) в возрасте от 6 до 17 лет с различными видами НРС и ВПС. Определено содержание 15 эссенциальных ХЭ (кальций, калий, магний, натрий, фосфор, сера, хром, медь, железо, йод, кобальт, марганец, молибден, селен, цинк) и 3 условно эссенциальных ХЭ (бор, кремний, ванадий) в волосах и в интраоперационных биоптатах детей с ВПС методами атомно-эмиссионной спектрометрии в индуктивно-связанной плазме и атомно-абсорбционной спектрометрии с электротермической атомизацией. Обработку результатов исследования проводили методами вариационной и альтернативной статистики с использованием лицензионного программного пакета «MedStat». Результаты. По результатам проведенного спектрального многоэлементного анализа интраоперационных биоптатов тканей сердца и магистральных сосудов выявлен дефицит эссенциальных ХЭ (K, Mn, Se, Cr, P, Со, S, Cu, Nа, Mo) и условно эссенциального микроэлемента Si. Доказана прямая сильная корреляционная зависимость между содержанием эссенциальных ХЭ (K, Mn, Se, Cr, Co) и условно эссенциального ХЭ Si в волосах и тканях сердца у детей с ВПС и НРС. Заключение. Выявленный дефицит эссенциальных ХЭ калия, марганца, селена, хрома, фосфора, кобальта, серы, меди, натрия, молибдена и условно эссенциального микроэлемента кремния, доказанная прямая сильная корреляционная зависимость между содержанием калия, марганца, селена, хрома, кобальта и кремния в волосах и тканях сердца у детей с ВПС и НРС подтверждает информативность использования данного биосубстрата для оценки содержания ХЭ в организме

Социально-экономические последствия старения населения: аспекты современных вызовов Российской Федерации

Purpose: the article summarizes the key characteristics of the population ageing phenomenon and identifies the channels through which it has an impact on the demographic crisis parameters as well as the socioeconomic growth of the country.Methods: the study is based on tracking the consequences associated with the phenomenon of population ageing. Simultaneously, computational and graphical methods, comparative and retrospective analysis of the sex and age pyramids, expert and empirical assessment of the trends in the structure of the population older than 60-65 years, as well as its economic burden per 1,000 able-bodied people, were used.Results: the main parameters of the socioeconomic impacts of population ageing are determined. Age limits and essential features of this phenomenon are revealed. The forecast trend of socioeconomic parameters of population ageing is supported by the SWOT analysis matrix, and a conceptual model for the implementation of systematic adjustment measures for the ongoing demographic crisis is proposed.Conclusions and Relevance: the article demonstrates that population ageing is not a fundamental socioeconomic problem that endangers the well-being of the population over working age. However, it has many negative consequences for the socioeconomic growth of the country that are still being researched; the real threats come not from population ageing as such, but from the existing disproportion in the workload of the population over 60-65 years old per 1,000 able-bodied population. Despite the relative parameters of the ageing trend in Russia, in the future, the life expectancy of the population will be 73.58-75.03 years.Цель статьи - обобщение сущностных характеристик феномена старения населения и обоснование каналов его влияния на основные параметры демографического кризиса и социально-экономического развития страны.Методы. Исследование основано на отслеживании сложившегося состояния старения населения - в расчетно-графическом анализе состава и структуры половозрастной пирамиды страны, в системной оценке эмпирических трендов индекса старения населения и его влияния на динамику ВВП государства. Наряду с традиционными и специфическими методами научного поиска применены методы компаративно-ретроспективного анализа и экспертно-рейтинговой оценки демографической нагрузки населения старше 60-65 лет на 1000 лиц трудоспособного населения.Результаты работы. Идентифицированы основные параметры социально-экономических последствий депопуляции страны. Выявлены существенные черты феномена старения населения и возрастные границы старости, приведена специфика контингента населения старше трудоспособного возраста. Обоснован прогнозный тренд социально-экономических параметров, результирующих со старением населения. На основе матрицы SWOT-анализа аспектов этого процесса предложена концептуальная модель реализации мер противодействия социально-экономическим вызовам старения населения.Выводы. В работе выявлено, что феномен старения населения не представляет собой фундаментальной социально-экономической проблемы, угрожающей благополучию населения старше трудоспособного возраста. Однако он имеет ряд негативных последствий для социально-экономического развития страны, которые подлежат дальнейшему исследованию. Реальные угрозы исходят не от феномена старения населения как такового, а от сложившейся диспропорции в нагрузке населения старше 60-65 лет на 1000 лиц трудоспособного населения. Несмотря на относительные параметры тренда старения России, на перспективу ожидаемая продолжительность жизни населения составит 73,58-75,03 лет.

Relationship between the degree of myocardial damage according to contrast-enhanced cardiac magnetic resonance imaging and laboratory data in patients with acute myocardial infarction

Aim. To evaluate the information value of a complex of clinical and biochemical parameters of myocardial damage in predicting the development of transmural myocardial damage according to magnetic resonance imaging (MRI) in patients with acute myocardial infarction (AMI).Material and methods. The study included patients admitted to the emergency cardiology department with acute coronary syndrome. All patients underwent invasive coronary angiography, laboratory tests, and dynamic determination of cardiac biomarkers. In the interval of 6,1±4 days from admission to the hospital, patients underwent contrast-enhanced cardiac MRI. According to the pattern of delayed contrast enhancement, patients were divided into two groups: with a transmural and subendocardial pattern.Results. The mean age of patients was 62,5±10,5 years, while 27 (71,1%) had ST-segment elevation AMI. Among the risk factors for coronary artery disease, dyslipidemia (89,5%), hypertension (68,4%), and smoking (57,9%) were the most common. Creatine phosphokinase-MB (CPK-MB), serum high-sensitivity cardiac troponin I (cTnI) and C-reactive protein (CRP) values after 24 h were significantly higher in patients with transmural hyperenhancement. Moderate positive relationship was found between the global size of left ventricular (LV) damage according to MRI data and the levels of CPK-MB after 24 h and 4 days, as well as with CRP after 24 h, 4 and 7 days, and cTnI level after 24 h and 4 days. In the group of patients with transmural pattern, the global size of LV damage was significantly higher. Patients of this group were characterized by higher prevalence of microvascular obstruction. In a univariate regression analysis, there were following significant predictors of transmural myocardial damage: CPK-MB after 4 days (p=0,023) and ST segment elevation (p=0,029). Multivariate regression analysis showed that the only independent predictor of transmural myocardial damage was an increase in CPKMB after 4 days (p=0,023).Conclusion. An independent predictor of LV transmural damage in AMI was an elevated level of CPK-MB after 4 days. However, this laboratory marker had unsatisfactory information completeness and predictive quality. In this regard, cardiac MRI in patients with AMI, compared with the standard clinical assessment, can be considered preferable for assessing the depth of myocardial damage, risk stratification, and prognosis

Study of local inflammatory response in different clinical forms of chronic polypous rhinosinusitis

Chronic rhinosinusitis (CRS) affects 5-12% of the world’s adult population. Chronic rhinosinusitis with nasal polyps (CRSwNP) accounts for 25-30% of all cases of CRS. CRSwNP-associated inflammatory process in nasal mucosa and paranasal sinuses depends on the characteristics of local immunity, including expression of a number of cytokines. The aim of this work was to investigate the parameters of local immunity in various clinical forms of CRSwNP. In this work, the concentrations of pro-inflammatory cytokines, i.e., interleukin-1β (IL-1β) and IL-8, antimicrobial function of neutrophils from the nasal cavity was evaluated, along with histological and immunohistochemical studies of polyposis tissue. The study included 4 groups of patients: a control group of practically healthy individuals, patients with CRSwNP, clinical cases with chronic purulent rhinosinusitis and nasal polyps (CPRSwNP), and patients with CRSwNP complicated by bronchial asthma (CRSwNP + BA), including the cases with asthmatic triad (CRSwNP + intolerance to NSAIDs + BA). The patients were classified on the basis of their clinical characteristics and severity of the course of the disease. Interleukin-1β (IL-1β) and IL-8 concentrations in nasal secretions were determined by enzyme-linked immunosorbent assay (ELISA). To assess functional activity of neutrophils, a lysosomal cationic test was used on the smears from mucous surface of inferior turbinate. Histological examination of the polypous tissue biopsies was performed in slices stained with Carazzi’s hematoxylin and eosin. IL-1β and IL-8 location in the polypous tissue were detected by indirect immunohistochemistry. In all groups of the patients, IL-1β and IL-8 concentrations exceeded those in the control group. The levels of IL-1β in the groups with CPRSwNP, CRSwNP + BA were significantly increased as compared with the CRSwNP group. IL-8 concentrations in the CRSwNP and CPRSwNP groups were significantly higher than in the CRSwNP + BA group. When analyzing antimicrobial function of neutrophils, the decreased average values of cytochemical coefficient were shown in CPRSwNP and CRSwNP + BA groups, compared with the control group and CRSwNP. In all clinical forms of CPMS, complex histopathological changes were observed, including leukocyte infiltration, fibrosis, edema, and collagen depositions. In addition, the integrity of epithelial layer was found to be damaged in polyposis, epithelial metaplasia is detected as well as increased mucus production. These disorders lead to a decrease in muco-ciliary clearance in nasal cavity. The most significant pathomorphological changes occur in CRSwNP + BA, especially in cases of asthmatic triad. According to immunohistochemical data, in various forms of CRSwNP, IL-1β- and IL-8-positive leukocytes, predominantly macrophages, are detected in the polypous tissue both subepithelially and in the connective tissue stroma of the polyps. Changed concentrations of pro-inflammatory cytokines in nasal secretion of the patients, altered antimicrobial activity of mucosal neutrophils, and characteristic pathomorphological disorders in polypous tissue of patients with CRSwNP are associated with severity of inflammatory process and clinical course of the disease. The results obtained are essential to understanding the mechanisms of pathogenesis in various subgroups of CRSwNP, assessing severity of the disease and efficiency of the treatment applied

Cerebrovascular disorders in patients with type 2 diabetes mellitus and resistant hypertension

BACKGROUND: Diabetes mellitus (DM) and hypertension are risk factors for cerebral stroke, which are exacerbated by the combination of these diseases. Identifying the factors involved in the development of subclinical brain damage could change the therapeutic strategy for protecting the brain.AIM: to study severity of MRI- sings of brain damage and to identify factors associated with their development in patients with type 2 diabetes and RHTN.MATERIALS AND METHODS: 46 patients with type 2 DM and RHTN were included in a single-center observational uncontrolled study. Patients underwent brain MRI (1.5 Tesla) with calculation of Evans’s index (EI), clinical and lab examinations (HbA1c, glucose, insulin, C-peptide, leptin, resistin, TNF- α, hsCRP, blood aldosterone, insulin-like growth factor-1 (IGF-1)), measurement of the office and ambulatory blood pressure (BP), assessment of peripheral and cerebral vasoreactivity (test with hyperventilation and breath holding).RESULTS: The most frequent MR brain changes were white matter lesions (WML) in periventricular region (PVR) (89%), focal WML (52%) and expansion both of the ventricles (45%) and subarachnoid spaces (65%). Multiple direct correlations were revealed between parameters of carbohydrate metabolism with the degree of WML in PVR and the density of the MR-signal in the basal nucleus (BN), as well as with EI. Adipokines had a direct relationship with the size of the chiasmatic cistern and IE (for resistin), as well as with the density of the MR signal from the BN and IE (for leptin), that was also directly related to the IGF-1 level. The aldosterone level positively correlated with the size of III ventricle. An increase in TNF-α and hsCRP was accompanied by an increase in the density of the MR-signal in the PVR. Impairment of cerebrovascular reactivity is associated with an increase in the density of the MR-signal in PVR and with indirect signs of cerebral atrophy (increase in EI, the size of cisterns and lateral ventricles). Impairment of peripheral vasoreactivity had direct relationship with EI and the expansion of the III ventricle. There were no direct correlations between the severity of MR-sings of brain damage and BP levels.CONCLUSION: The combination of type 2 DM with RHTN is characterized by a high frequency of WML and liquorodynamics disturbances, which related with metabolic, neurohormonal and hemodynamic factors in the absence of a direct relationship with the degree of BP increas

Voltage-Dependent Gating in a “Voltage Sensor-Less” Ion Channel

An unusual mechanism of ion channel regulation generates voltage-dependent gating in the absence of a canonical voltage-sensing domain

Возможности фармакологического лечения остеоартрита: фокус на симптоматические медленно действующие препараты (SYSADOA) и индивидуальные особенности пациента. Резолюция международного совещания экспертов

The paper presents the results of the Osteoarthritis (OA) Expert Council held on September 8, 2019, which was attended by Russian and foreign specialists. The experts considered pharmacological treatment options for OA. The expert meeting resolution states that the treatment of patients with OA should be based on an individual assessment of the patient and on a modern evidence base of therapy efficacy.Treatment of patients with OA is based on the principles of evidence-based medicine that requires an integrated approach and the need of SYSADOAs prescription. Combined drugs with therapeutic dosages of chondroitin sulfate and glucosamine in the early stages of the disease are available as basic agents. The place of paracetamol in the anesthetic therapy algorithm in OA needs to be clarified. It is also noted that when choosing nonsteroidal anti-inflammatory drugs for OA treatment, it is important to take into account individual patient characteristics and the presence of comorbidities.Представлены результаты Экспертного совета по остеоартриту (ОА), проходившего 8 сентября 2019 г., в котором приняли участие российские и зарубежные специалисты. Рассматривались возможности фармакологического лечения ОА. В резолюции совещания указано, что лечение больных ОА должно быть основано на индивидуальной оценке состояния пациента и современных доказательствах эффективности терапии. Лечение больных ОА на основании принципов доказательной медицины предполагает комплексный подход и назначение SYSADOA. Комбинированные препараты с терапевтическими дозами хондроитина сульфата и глюкозамина уже на ранних стадиях заболевания рассматриваются в качестве базисных средств. Место парацетамола в алгоритме обезболивающей терапии при ОА требует уточнения. Отмечено также, что при выборе нестероидных противовоспалительных препаратов для лечения ОА важно учитывать индивидуальные особенности пациента и наличие коморбидных состояний

Inhibition of Soluble Tumor Necrosis Factor Ameliorates Synaptic Alterations and Ca2+ Dysregulation in Aged Rats

The role of tumor necrosis factor α (TNF) in neural function has been investigated extensively in several neurodegenerative conditions, but rarely in brain aging, where cognitive and physiologic changes are milder and more variable. Here, we show that protein levels for TNF receptor 1 (TNFR1) are significantly elevated in the hippocampus relative to TNF receptor 2 (TNFR2) in aged (22 months) but not young adult (6 months) Fischer 344 rats. To determine if altered TNF/TNFR1 interactions contribute to key brain aging biomarkers, aged rats received chronic (4–6 week) intracranial infusions of XPro1595: a soluble dominant negative TNF that preferentially inhibits TNFR1 signaling. Aged rats treated with XPro1595 showed improved Morris Water Maze performance, reduced microglial activation, reduced susceptibility to hippocampal long-term depression, increased protein levels for the GluR1 type glutamate receptor, and lower L-type voltage sensitive Ca2+ channel (VSCC) activity in hippocampal CA1 neurons. The results suggest that diverse functional changes associated with brain aging may arise, in part, from selective alterations in TNF signaling