Epidemiology of hip fracture in Belarus: development of a country-specific FRAX model and its comparison to neighboring country models

Summary Fracture probabilities resulting from the newly generated FRAX model for Belarus based on regional estimates of the hip fracture incidence were compared with FRAX models of neighboring countries. Differences between the country-specific FRAX patterns and the rank orders of fracture probabilities were modest. Objective This paper describes the epidemiology of hip fractures in Belarus that was used to develop the country-specific fracture prediction FRAX® tool and illustrates its features compared to models for the neighboring countries of Poland, Russia, and Lithuania. Methods We carried out a population-based study in a region of Belarus (the city of Mozyr) representing approximately 1.2% of the country’s population. We aimed to identify all hip fractures in 2011–2012 from hospital registers and primary care sources. Age- and sex-specific incidence and national mortality rates were incorporated into a FRAX model for Belarus. Fracture probabilities were compared with those derived from FRAX models in neighboring countries. Results The estimated number of hip fractures nationwide in persons over the age of 50 years for 2015 was 8250 in 2015 and is predicted to increase to 12,918 in 2050. The annual incidence of fragility hip fractures in individuals aged 50 years or more was 24.6/10,000 for women and 14.6/10,000 for men, standardized to the world population. The comparison with FRAX models in neighboring countries showed that hip fracture probabilities in men and women in Belarus were similar to those in Poland, Russia, and Lithuania. The difference in incidence rates between the surveys including or excluding data from primary care suggested that 29.1% of patients sustaining a hip fracture were not hospitalized and, therefore, did not receive specialized medical care. Conclusion A substantial proportion of hip fractures in Belarus does not come to hospital attention. The FRAX model should enhance accuracy of determining fracture probability among the Belarus population and help guide decisions about treatment

A surrogate FRAX model for the Kyrgyz Republic

Summary The hip fracture rates from Kazakhstan were used to create a surrogate FRAX® model for the Kyrgyz Republic. Introduction The International Society for Clinical Densitometry and International Osteoporosis Foundation recommend utilizing a surrogate FRAX model, based on the country-specific risk of death, and fracture data based on a country where fracture rates are considered to be representative of the index country. Objective This paper describes a surrogate FRAX model for the Kyrgyz Republic. Methods The FRAX model used the incidence of hip fracture from the neighbouring country of Kazakhstan and the death risk for the Kyrgyz Republic. Results Compared with the model for Kazakhstan, the surrogate model gave somewhat higher 10-year fracture probabilities for men between 60 and 80 years of age and lower probabilities for men above the age of 80. For women the probabilities were similar up to the age of 75–80 years and then lower. There were very close correlations in fracture probabilities between the surrogate and authentic models (1.00) so that the use of the Kyrgyz model had little impact on the rank order of risk. It was estimated that 2752 hip fractures arose in 2015 in individuals over the age of 50 years in the Kyrgyz Republic, with a predicted increase by 207% to 8435 in 2050. Conclusion The surrogate FRAX model for the Kyrgyz Republic provides the opportunity to determine fracture probability among the Kyrgyz population and help guide decisions about treatment

ВИКОРИСТАННЯ МЕТОДІВ МАТЕМАТИЧНОГО МОДЕЛЮВАННЯ ДЛЯ ПІДВИЩЕННЯ ЕФЕКТИВНОСТІ ЕКСТРАКОРПОРАЛЬНОГО ЗАПЛІДНЕННЯ. ПОСТАНОВКА ПРОБЛЕМИ

There were presented the results of patterning a mathematical multifactor model of efficiency of the method of extracorporal fertilization.Представлена классификация методов математического моделирования, используемых для повышения эффективности экстракорпорального оплодотворения. Проанализированы результаты использования подобных моделей.Представлена класифікація методів математичного моделювання, що використовуються для підвищення ефективності екстракорпорального запліднення. Проаналізовані результати застосування подібних моделей

The use of SSR-markers in rice breeding for resistance to blast and submergence tolerance

Received: March 16th, 2022 ; Accepted: July 20th, 2022 ; Published: September 6th, 2022 ; Correspondence: [email protected] identification of effective specialized DNA markers providing the clear control of target locus inheritance by the trait of submergence tolerance has been conducted. Among the studied set of microsatellite markers, two the most informative SSR-markers - RM 7481, PrC3 showed high efficiency in detecting intraspecific polymorphism of rice varieties and lines used in the work. With the use of these markers the clear genotype marking the obtained hybrid rice plants by this trait has been conducted and it is has been verified by phenotype evaluation as a result of laboratory trials. The plant samples carrying the target gene in heterozygous and homozygous state has been selected. About 400 backcrossed self-pollinated rice lines with introgressed and pyramided resistance genes Pi-1, Pi-2, Pi-33, Pi-ta, Pi-b to Pyricularia oryzae Cav. were obtained within the frameworks of program to develop genetic rice sources resistant to blast. The conducted testing for resistance to blast and the assessment by economically valuable traits have allowed to select the prospective rice samples. The plant samples of F2 and BC1F1 generations with combination of resistance to blast genes (Pi) and submergence tolerance gene (Sub1A) in homozygous and heterozygous state that is confirmed be the results of analysis of their DNA have been obtained. The obtained hybrid plants are being tested in breeding nurseries for a complex of economically valuable traits. The best plants will be selected and send to State Variety Testing system. Their involving in rice industry will reduce the use of plant protection chemicals against diseases and weeds, thereby increasing the ecology status of the rice industry

Anisotropic Emission from Multilayered Plasmon Resonator Nanocomposites of Isotropic Semiconductor Quantum Dots

Cataloged from PDF version of article.We propose and demonstrate a nanocomposite localized surface plasmon resonator embedded into an artificial three-dimensional construction. Colloidal semiconductor quantum dots are assembled between layers of metal nanoparticles to create a highly strong plasmon-exciton interaction in the plasmonic cavity. In such a multilayered plasmonic resonator architecture of isotropic CdTe quantum dots, we observed polarized light emission of 80% in the vertical polarization with an enhancement factor of 4.4, resulting in a steady-state anisotropy value of 0.26 and reaching the highest quantum efficiency level of 30% ever reported for such CdTe quantum dot solids. Our electromagnetic simulation results are in good agreement with the experimental characterization data showing a significant emission enhancement in the vertical polarization, for which their fluorescence decay lifetimes are substantially shortened by consecutive replication of our unit cell architecture design. Such strongly plasmon-exciton coupling nanocomposites hold great promise for future exploitation and development of quantum dot plasmonic biophotonics and quantum dot plasmonic optoelectronics

Bio-nanohybrids of quantum dots and photoproteins facilitating strong nonradiative energy transfer

Cataloged from PDF version of article.Utilization of light is crucial for the life cycle of many organisms. Also, many organisms can create light by utilizing chemical energy emerged from biochemical reactions. Being the most important structural units of the organisms, proteins play a vital role in the formation of light in the form of bioluminescence. Such photoproteins have been isolated and identified for a long time; the exact mechanism of their bioluminescence is well established. Here we show a biomimetic approach to build a photoprotein based excitonic nanoassembly model system using colloidal quantum dots (QDs) for a new bioluminescent couple to be utilized in biotechnological and photonic applications. We concentrated on the formation mechanism of nanohybrids using a kinetic and thermodynamic approach. Finally we propose a biosensing scheme with an ON/OFF switch using the QD-GFP hybrid. The QD-GFP hybrid system promises strong exciton-exciton coupling between the protein and the quantum dot at a high efficiency level, possessing enhanced capabilities of light harvesting, which may bring new technological opportunities to mimic biophotonic events

Clinical and instrumental associations of knee osteoarthrosis and pathology of the veins of the lower extremities

Knee osteoarthritis (OA) and varicose disease of the lower extremities (VD) are two diseases common in middle– aged and older women. Questions about whether their combination is accidental or natural and whether VD affects the course and severity of OA, remain unresolved.The aim of the study was to look for the possible association between knee OA and lower limb vein pathology on the basis of clinical and modern instrumental investigation sand to study the effect of the VD on the clinical manifestations and severity of knee OA.Materials and methods. A case-control study was conducted in 85 women 40–60 years old with knee OA diagnosed in accordance with the criteria of ACR (1986) and 50 women of the same age without signs of knee OA. Women of both groups were evaluated for complaints and objective examination with an emphasis on diseases of the joints and veins of the lower extremities, radiography of the knee joints, ultrasound duplex scanning of the veins of the lower extremities. The severity of OA was assessed by the Lequenne indices. The clinical assessment of venous pathology was carried out according to the CEAP classification.Results. Patients with knee OA more often than their peers without joint pathology have VD (43% vs 22%; p=0.015), signs of chronic venous insufficiency (28% vs 12%; p=0.03), as well as valve failure of several lower limb veins simultaneously (53% vs 20%; p=0.0004). After correction by body mass index, the association of knee OA with detected vascular pathology remained clinically and statistically significant. The presence of VD with moderate manifestations of chronic venous insufficiency, as well as ultrasound signs of venous pathology, was not associated with the clinical signs and course of knee OA.Conclusions. Knee OA in middle-aged and older women, regardless of body mass index, is associated with VD and ultrasound signs of simultaneous valves failure of several veins. Manifestations of chronic venous insufficiency did not affect the clinical picture and severity of knee OA

Epidemiology of osteoporotic fracture in Kazakhstan and development of a country specific FRAX model

Summary Retrospective and prospective population-based survey in a region of the Republic of Kazakhstan determined the incidence of fractures at the hip, proximal humerus and distal forearm. The hip fracture rates were used to create a FRAX® model to enhance fracture risk assessment in Kazakhstan. Objective This paper describes the epidemiology of osteoporotic fractures in the Republic of Kazakhstan that was used to develop a country specific FRAX® tool for fracture prediction. Methods We carried out a retrospective population-based survey in Taldykorgan in the Republic of Kazakhstan representing approximately 1% of the country’s population. Hip, forearm and humerus fractures were identified retrospectively in 2015 and 2016 from hospital registers and the trauma centre. Hip fractures were prospectively identified in 2017 from the same sources and additionally from primary care data. Age- and sex-specific incidence of hip fracture and national mortality rates were incorporated into a FRAX model for Kazakhstan. Fracture probabilities were compared with those from neighbouring countries having FRAX models. Results The difference in hip fracture incidence between the retrospective and prospective survey indicated that approximately 25% of hip fracture cases did not come to hospital attention. The incidence of hip fracture applied nationally suggested that the estimated number of hip fractures nationwide in persons over the age of 50 years for 2015 was 11,690 and is predicted to increase by 140% to 28,000 in 2050. Hip fracture incidence was a good predictor of forearm and humeral fractures in men but not in women. Conclusion The FRAX model should enhance accuracy of determining fracture probability among the Kazakh population and help guide decisions about treatment

Регуляторы роста паннуса при ревматоидном артрите, являющиеся потенциальными мишенями биологической терапии

The main goal of treatment for rheumatoid arthritis (RA) is to suppress inflammation using basic and symptomatic therapies. At the same time, the above strategy does not significantly stop joint  destruction that leads to disability in patients. The review analyzes  publications dealing with a search for intercellular interaction  regulators among the main effector cells in the pannus – fibroblast- like synoviocytes (FLSs). It assesses the influence of FLS aggression  factors on invasive pannus behavior, the possibility of their targeted deactivation during biological therapy, and the preliminary  results of similar treatment by the examples of animal models. It is  shown that the most promising targets for biological therapy may be FLS adhesion molecules, such as transmembrane receptor cadherin  11, integrins α5/β1, and VCAM1, ICAM1, which actively participate in the attachment of FLSs to the cartilage surface and activate their production of cytokines, growth factors and aggression factors.Основной целью лечения ревматоидного артрита (РА) является подавление воспаления с помощью базисной и симптоматической терапии. При этом указанная стратегия значимо не  останавливает деструкцию сустава, ведущую к инвалидизации пациентов. В обзоре  представлен анализ публикаций, посвященных поиску регуляторов межклеточного  взаимодействия среди основных эффекторных клеток паннуса – фибробластоподобных  синовиоцитов (ФПС). Представлены оценка влияния факторов агрессии ФПС на инвазивное  «поведение» паннуса, возможность их прицельной дезактивации в рамках биологической  терапии, а также предварительные результаты подобного лечения на примерах животных  моделей. Показано, что наиболее перспективными мишенями биологической терапии могут  являться молекулы адгезии ФПС: трансмембранный рецептор кадгерин 11, интегрины α5/β1, VCAM1, ICAM1, активно участвующие в процессах прикрепления ФПС к поверхности хряща  и активирующие выработку ими цитокинов, факторов роста и агрессии

PMS61 Health-Related Quality of Life After Vertebral Fracture: Differences Between the EQ-5D and Time-Trade-Off Instruments

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