The problems of foreign specialists education at UrFU for the nuclear energy of Rosatom partner countries

Сформулированы основные задачи по подготовке специалистов для АЭС российского дизайна, сооружаемых за рубежом, в УрФУ. Проведен анализ начального периода обучения студентов Республики Вьетнам на кафедре «Атомные станции и ВИЭ», выявлены основные проблемы. Сформулированы предложения по совершенствованию процесса обучения.Defined are the main tasks of the specialists training at UrFU for the NPPs of Russian design which are constructed abroad. The analysis of initial period of Vietnam students’ education at Nuclear Power Plants and RES department is made. Main problems are detected. The ways of educational process improvements are formulated

Estimation of the passive heat removing efficiency from a VVER NPP steam generator

Described are the computer models of several design variants of heat exchangers cooled by the natural convection of surrounding air. The results of thermohydraulic analysis are given.Описаны модели нескольких вариантов конструкции теплообменных аппаратов, охлаждаемых за счет естественной циркуляции воздуха. Приведены результаты теплогидравлического анализа

2-Deoxy-D-Glucose Treatment of Endothelial Cells Induces Autophagy by Reactive Oxygen Species-Mediated Activation of the AMP-Activated Protein Kinase

Autophagy is a cellular self-digestion process activated in response to stresses such as energy deprivation and oxidative stress. However, the mechanisms by which energy deprivation and oxidative stress trigger autophagy remain undefined. Here, we report that activation of AMP-activated protein kinase (AMPK) by mitochondria-derived reactive oxygen species (ROS) is required for autophagy in cultured endothelial cells. AMPK activity, ROS levels, and the markers of autophagy were monitored in confluent bovine aortic endothelial cells (BAEC) treated with the glycolysis blocker 2-deoxy-D-glucose (2-DG). Treatment of BAEC with 2-DG (5 mM) for 24 hours or with low concentrations of H2O2 (100 µM) induced autophagy, including increased conversion of microtubule-associated protein light chain 3 (LC3)-I to LC3-II, accumulation of GFP-tagged LC3 positive intracellular vacuoles, and increased fusion of autophagosomes with lysosomes. 2-DG-treatment also induced AMPK phosphorylation, which was blocked by either co-administration of two potent anti-oxidants (Tempol and N-Acetyl-L-cysteine) or overexpression of superoxide dismutase 1 or catalase in BAEC. Further, 2-DG-induced autophagy in BAEC was blocked by overexpressing catalase or siRNA-mediated knockdown of AMPK. Finally, pretreatment of BAEC with 2-DG increased endothelial cell viability after exposure to hypoxic stress. Thus, AMPK is required for ROS-triggered autophagy in endothelial cells, which increases endothelial cell survival in response to cell stress

Clinical Manifestation and Errors in the Diagnosis of Classical Paroxysmal Nocturnal Hemoglobinuria: A clinical case series of 150 patients

Background. Paroxysmal nocturnal hemoglobinuria (PNH) is a rare clonal disease of the blood system, characterized by intravascular hemolysis, cytopenia and thrombosis. Diagnostic errors with delayed diagnosis of PNH are often due to the variety of the clinical presentation and the lack of awareness of the doctors of this rare disease. Aim. The aim of the study was to characterize the options for clinical manifestation and the complexity of diagnosis of classical PNH. Materials & Methods. The research included 150 patients with PNH. The inclusion criteria were: 1) clinical and laboratory signs of intravascular hemolysis; 2) verification of the diagnosis using standard flow cytometry; 3) absence of aplastic anemia, myelodysplastic syndrome and primary myelofibrosis. The patients were of 13 to 72 years old (median age 34 years). The study population consisted of 89 (59 %) women and 61 (41 %) men. Results. The time before the diagnosis ranged from 0 to 455 months (median 33 months). The median size of the PNH clone among granulocytes and erythrocytes was 95 % and 41 %, respectively. The median of the lactic dehydrogenase was 7.2 times the upper limit of normal (ULN). Cytopenia occurred in 65 % of patients, including a combination of thrombocytopenia and neutropenia in 29 % of cases. Weakness and fatigue (99 %), hemoglobinuria (57 %), pain (52 %), icterus (46 %), dysphagia (37 %) and infection/fever (23 %) were the most common symptoms on the onset of the disease. Before the diagnosis of PNH, thrombosis or acute kidney injury was found in 22 % and 18 % of patients, respectively. Only 22 % of patients were initially diagnosed with PNH. In the remaining patients, the primary diagnosis was inadequate. Conclusion. The clinical manifestation of PNH is characterised by the presence of hemoglobinuria, cytopenia and early thrombosis in 57 %, 65 % and 22 % of patients, respectively. Errors of the primary diagnosis reach 78 % and lead to inadequate treatment. The results of the research showed the need for multidisciplinary approach and strict adherence to diagnostic algorithms of PNH in the risk groups, according to current recommendations