Youth as a Subject and Object of State Youth Policy: Problematic Aspects of the Concept

The article discusses the concept of «youth», «youth policy» through the prism of historical, socio-political and legislative aspects of state youth policy in the Russian Federation. The authors analyzed the constitutions of the RSFSR and the USSR for the purpose of determining in them the concepts of the constitutional legal status of youth, as well as the constitution and legislation of the CIS member states, model legislative acts of the IPA CIS. As a result of the research of regulatory legal acts and specialized literature in the area of state youth policy, general patterns and legal uncertainties were identified: in terms of categorical-conceptual apparatus (for example, the lack of a definition of the term “teenager”), the age limits of youth, and problematic aspects of youth policy, an attempt was made to formulate development vectors and ways of addressing them

Promising directions for vaccine development to prevent shigellosis

Shigellosis (bacterial dysentery) is an acute infectious disease caused by Shigella spp., members of the Enterobacteriaceae family. The disease has the highest mortality rate amongst bacterial enteric infections. A considerable proportion of Shigella infections occur in children under the age of five. In 2017, WHO included Shigella spp. strains into the list of “priority pathogens” that are resistant to most antibiotics and pose a threat to global public health. This provided a stimulus for the development of new antibiotics to treat shigellosis. Apart from the creation of new antimicrobial therapies for Shigella infections, an important role in fighting against shigellosis belongs to the preventative measures set out in WHO’s Immunisation Agenda 2030. These include sanitation, hygiene, consumption of clean water, and vaccination. The development of Shigella vaccines has been a priority of the WHO programme for more than 20 years. The aim of the study was to analyse promising approaches to Shigella vaccine development. According to the analysis of literature, only one vaccine against shigellosis has been approved so far—Shigellvac, the Russian polysaccharide dysentery vaccine against Shigella sonnei. This study covers a number of vaccine candidates (whole-cell, polysaccharide, polysaccharide conjugate, protein antigen-based vaccines, etc.) that are at different stages of clinical trials. The importance of researching combination (multivalent) vaccines against Shigellа spp. and other enteric pathogens is noted. However, the authors consider subunit vaccines based on Ipa proteins, providing broad cross-protection against Shigellа spp., and conjugate polyvalent vaccines for children under 5 the most promising for further development

Перспективные направления разработки вакцинных препаратов для профилактики шигеллеза

Shigellosis (bacterial dysentery) is an acute infectious disease caused by Shigella spp., members of the Enterobacteriaceae family. The disease has the highest mortality rate amongst bacterial enteric infections. A considerable proportion of Shigella infections occur in children under the age of five. In 2017, WHO included Shigella spp. strains into the list of “priority pathogens” that are resistant to most antibiotics and pose a threat to global public health. This provided a stimulus for the development of new antibiotics to treat shigellosis. Apart from the creation of new antimicrobial therapies for Shigella infections, an important role in fighting against shigellosis belongs to the preventative measures set out in WHO’s Immunisation Agenda 2030. These include sanitation, hygiene, consumption of clean water, and vaccination. The development of Shigella vaccines has been a priority of the WHO programme for more than 20 years. The aim of the study was to analyse promising approaches to Shigella vaccine development. According to the analysis of literature, only one vaccine against shigellosis has been approved so far—Shigellvac, the Russian polysaccharide dysentery vaccine against Shigella sonnei. This study covers a number of vaccine candidates (whole-cell, polysaccharide, polysaccharide conjugate, protein antigen-based vaccines, etc.) that are at different stages of clinical trials. The importance of researching combination (multivalent) vaccines against Shigellа spp. and other enteric pathogens is noted. However, the authors consider subunit vaccines based on Ipa proteins, providing broad cross-protection against Shigellа spp., and conjugate polyvalent vaccines for children under 5 the most promising for further development.Шигеллез (бактериальная дизентерия) — острое инфекционное заболевание, вызываемое возбудителями Shigellа spp. семейства Enterobacteriaceae, характеризуется наибольшим показателем смертности населения от бактериальных кишечных инфекций. Значительная доля случаев заболевания приходится на детей в возрасте до 5 лет. В 2017 г. штаммы Shigellа spp. были включены в опубликованный ВОЗ список устойчивых к действию большинства антибиотиков «приоритетных патогенов», представляющих угрозу мировому здравоохранению, что послужило стимулом к разработке новых противомикробных препаратов для терапии шигеллезов. Наряду с созданием антимикробных средств против Shigellа spp. важную роль в борьбе с шигеллезами играет комплекс превентивных мер, изложенный в программе иммунизации ВОЗ 2030, в который, помимо санитарии, гигиены и потребления чистой воды, входит вакцинация. Разработка вакцины против шигеллеза остается одним из приоритетных направлений программы ВОЗ уже более 20 лет. Цель работы — анализ перспективных направлений разработки вакцинных препаратов против шигеллеза. Проведенный анализ данных литературы показал, что в настоящее время на мировом рынке зарегистрирована только одна вакцина против шигеллеза — российская вакцина Шигеллвак, полисахаридная дизентерийная вакцина против шигелл Зонне. Рассмотрен ряд вакцинных препаратов (цельноклеточные, полисахаридные конъюгированные и неконъюгированные, препараты на основе белковых антигенов и др.), находящихся на различных этапах клинических испытаний. Отмечено, что важным направлением является создание комбинированных мультивалентных препаратов против инфекций, вызываемых Shigellа spp. и другими кишечными патогенами. Сделан вывод о том, что наиболее перспективными являются разработки субъединичных вакцин на основе Ipa-белков, обеспечивающих перекрестную защиту против Shigellа spp., а также конъюгированных поливалентных вакцин, предназначенных для детей в возрасте до 5 лет

Экспериментальная оценка возможности определения бактериальных эндотоксинов с помощью гель-тромб теста в вакцине брюшнотифозной Ви-полисахаридной

Scientific relevance. Currently, only the rabbit pyrogen test is used to test the Vianvac® typhoid Vi polysaccharide vaccine for pyrogenicity. As part of the product specification file, the gel-clot test for bacterial endotoxins (BE) will improve the reliability of quality control, as well as harmonise the requirements for the vaccine with the requirements outlined for this group of medicinal products by leading world pharmacopoeias.Aim. This study aimed at an experimental assessment of the applicability of the gel-clot test to the quantification of BE in the typhoid Vi polysaccharide vaccine.Materials and methods. This study used samples from 5 batches of the typhoid Vi polysaccharide vaccine (0.5 mL/dose, solution for subcutaneous injection), LAL and TAL reagents. The analysis included the gel-clot test and the pyrogenicity test according to the State Pharmacopoeia of the Russian Federation (OFS.1.2.4.0006.15 and OFS.1.2.4.0005.15, respectively).Results. According to calculations, the BE limit for the tested vaccine was 96 EU/mL, and the maximum valid dilution (MVD) was 3200. The authors determined the regulatory requirements for typhoid Vi polysaccharide vaccine quality in terms of BE (not more than 48 EU/dose). The in vitro BE tests were positive at vaccine dilutions of 1/16 to 1/32 and negative at 1/64 to 1/256. The authors selected and validated a working vaccine dilution of 1/128. The BE content measured in the tested samples ranged from 0.24 to 0.48 EU/dose. The in vivo pyrogen tests were positive at dilutions of 1/16 to 1/128 and negative at 1/256 in all experiments with samples from 5 vaccine batches at dilutions ranging from 1/16 to 1/256.Conclusions. This study has experimentally proven that the gel-clot test can quantify BE in the typhoid Vi polysaccharide vaccine. The authors have recommended introducing the gel-clot BE test in the monograph of the State Pharmacopoeia of the Russian Federation on the typhoid Vi polysaccharide vaccine (FS.3.3.1.0012.15).Актуальность. Оценка содержания пирогенных примесей в вакцине брюшнотифозной Ви-полисахаридной (Вианвак®) проводится в настоящее время только биологическим тестом на пирогенность. Определение бактериальных эндотоксинов (БЭ) с помощью гель-тромб теста и введение показателя «Бактериальные эндотоксины» в нормативную документацию на препарат позволят существенно повысить надежность контроля качества данной вакцины, а также гармонизировать требования к ней с требованиями ведущих фармакопей мира к данной группе лекарственных препаратов.Цель. Экспериментальная оценка возможности определения содержания бактериальных эндотоксинов с помощью гель-тромб теста в брюшнотифозной Ви-полисахаридной вакцине.Материалы и методы. Образцы вакцины брюшнотифозной Ви-полисахаридной (раствор для подкожного введения, 0,5 мл/доза) пяти серий; ЛАЛ-реактив; ТАЛ-реактив. Испытания проводились с использованием гель-тромб теста с учетом требований Государственной фармакопеи Российской Федерации (ОФС.1.2.4.0006.15) и теста на пирогенность согласно ОФС.1.2.4.0005.15.Результаты. Расчетное предельное содержание БЭ в испытуемой вакцине составляет 96 ЕЭ/мл, значение максимально допустимого разведения (МДР) — 3200. Установлены нормативные требования к качеству вакцины по показателю «Бактериальные эндотоксины» (не более 48 ЕЭ/доза). Выявлено наличие БЭ в разведениях препарата 1/16–1/32 и отсутствие — в разведениях 1/64–1/256. Выбрано и валидировано рабочее разведение препарата 1/128. Полученные значения содержания БЭ в исследуемых образцах находятся в диапазоне от 0,24 до 0,48 ЕЭ/доза. Испытания на пирогенность in vivo образцов пяти серий вакцины в разведениях от 1/16 до 1/256 показали, что введение животным препарата в разведениях 1/16–1/128 вызывало пирогенную реакцию, а при введении вакцины в разведении 1/256 пирогенная реакция отсутствовала во всех экспериментах.Выводы. Экспериментально доказана возможность определения бактериальных эндотоксинов в вакцине брюшнотифозной Ви-полисахаридной с помощью гель-тромб теста. Рекомендовано введение показателя «Бактериальные эндотоксины» в Государственную фармакопею Российской Федерации ФС.3.3.1.0012.15 «Вакцина брюшнотифозная Ви-полисахаридная»

Multiferroic Coupling of Ferromagnetic and Ferroelectric Particles through Elastic Polymers

Multiferroics are materials that electrically polarize when subjected to a magnetic field and magnetize under the action of an electric field. In composites, the multiferroic effect is achieved by mixing of ferromagnetic (FM) and ferroelectric (FE) particles. The FM particles are prone to magnetostriction (field-induced deformation), whereas the FE particles display piezoelectricity (electrically polarize under mechanical stress). In solid composites, where the FM and FE grains are in tight contact, the combination of these effects directly leads to multiferroic behavior. In the present work, we considered the FM/FE composites with soft polymer bases, where the particles of alternative kinds are remote from one another. In these systems, the multiferroic coupling is different and more complicated in comparison with the solid ones as it is essentially mediated by an electromagnetically neutral matrix. When either of the fields, magnetic or electric, acts on the ‘akin’ particles (FM or FE) it causes their displacement and by that perturbs the particle elastic environments. The induced mechanical stresses spread over the matrix and inevitably affect the particles of an alternative kind. Therefore, magnetization causes an electric response (due to the piezoeffect in FE) whereas electric polarization might entail a magnetic response (due to the magnetostriction effect in FM). A numerical model accounting for the multiferroic behavior of a polymer composite of the above-described type is proposed and confirmed experimentally on a polymer-based dispersion of iron and lead zirconate micron-size particles. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.Funding: The reported study was funded by the Russian Scientific Foundation according to research project No. 21-72-30032 (experimental investigation and analysis); authors Makarova L.A. and Isaev D.A. acknowledge the President of the Russian Federation Grant Number MK-716.2020.2 (simulation results). Authors Isaenko M.B. and Perov N.S. acknowledge partial support from Lomonosov Moscow State University Program of Development

Брюшнотифозные вакцины. История создания и современные вакцинные препараты

Typhoid fever is an acute infectious disease caused by Salmonella enterica subsp. enterica serovar Typhi (S. Typhi), which is still extremely common in endemic low- and middle-income countries of Asia and Africa. Industrialised countries may also be affected by typhoid fever outbreaks due to booming international tourism, and natural disasters. Given S. Typhi progressive resistance to antibiotics, high epidemiological burden, and lack of adequate sanitation and hygiene in a number of regions, the introduction of new treatment protocols and the improvement of preventive vaccination are critical tasks in global healthcare. The aim of the study was to highlight the main historical aspects of the typhoid vaccine development, to summarise data on the licensed vaccines and promising approaches to the development of new typhoid vaccines. The paper describes the current epidemiological situation of typhoid fever globally and in the Russian Federation. It dwells upon the global experience in typhoid vaccine development from the production of an inactivated vaccine to the development of conjugated vaccines. The paper summarises data on Russian and foreign-made typhoid fever vaccines currently available in the global pharmaceutical market. It outlines the main trends in the development of vaccines against the disease caused by S. Typhi. The paper demonstrates the need for improving the efficacy of existing vaccines and development of new typhoid combination vaccines.Брюшной тиф — острое инфекционное заболевание, вызываемое возбудителем Salmonella enterica subsp. enterica серотип Typhi (S. Typhi), по-прежнему является одной из основных причин заболеваемости населения в эндемичных экономически средне- и слаборазвитых странах Азии и Африки. Индустриальные страны могут быть подвержены вспышкам брюшного тифа ввиду стремительно развивающегося международного туризма, а также стихийных бедствий. В условиях прогрессирующей резистентности S. Typhi к антимикробным препаратам, высокой эпидемиологической нагрузки и невозможности обеспечения удовлетворительных санитарно-гигиенических условий в ряде регионов, наряду с внедрением новых протоколов лечения заболевания, актуальной задачей мирового здравоохранения является развитие вакцинопрофилактики брюшного тифа. Цель работы — освещение основных аспектов истории создания брюшнотифозных вакцин, систематизация данных о лицензированных вакцинных препаратах и перспективных направлениях разработки новых вакцин. В статье описана эпидемиологическая картина брюшного тифа в мире и в Российской Федерации. Изложен мировой опыт создания вакцинных препаратов от момента получения убитой брюшнотифозной вакцины до этапа производства конъюгированных вакцин. Приведена информация об отечественных и зарубежных вакцинах, представленных на мировом фармацевтическом рынке. Обозначены основные тенденции в сфере разработки вакцинных препаратов против заболевания, вызываемого S. Typhi. Сделан вывод о необходимости повышения эффективности ранее разработанных вакцин, а также создания новых, комбинированных вакцинных препаратов против брюшного тифа

Unidirectional constant rate motion of the ribosomal scanning particle during eukaryotic translation initiation

According to the model of translation initiation in eukaryotes, the 40S ribosomal subunit binds to capped 5′-end of mRNA and subsequently migrates along 5′-UTR in searching for initiation codon. However, it remains unclear whether the migration is the result of a random one-dimensional diffusion, or it is an energy-driven unidirectional movement. To address this issue, the method of continuous monitoring of protein synthesis in situ was used for high precision measurements of the times required for translation of mRNA with 5′-UTRs of different lengths and structures in mammalian and plant cell-free systems. For the first time, the relationship between the scanning time and the 5′-UTR length was determined and their linear correlation was experimentally demonstrated. The conclusion is made that the ribosome migration is an unidirectional motion with the rate being virtually independent of a particular mRNA sequence and secondary structure

Results of Epizootiological Monitoring of Natural Foci for Bacterial Vector-Borne Infections in Caucasian Mineral Waters Region of the Stavropol Territory in 2018–2020

The aim of the study was to assess the epizootiological situation on bacterial vector-borne infections in Caucasian Mineral Waters area of the Stavropol Territory over the period of 2018–2020.Materials and methods. 3494 specimens of ticks (473 pools), 257 specimens of small mammals, 9 regurgitates of birds of prey and mammals, 7 excreta samples of small mammals, and 2 water samples were tested. Laboratory research of the field material was carried out using molecular-genetic, serological, biological methods. Statistical analysis of laboratory results was conducted using Microsoft Excel 2010. The data were mapped using QGIS 2.18 software.Results and discussion. The study revealed that the 44.8 % of collected ticks were positive for tick-borne borreliosis, 21.5 % – for tick-borne rickettsiosis, 10.3% – for human granulocytic anaplasmosis, 2.7 % – for Q fever, 0.84 % – for tularemia. There has been an increase in the percentage of positives for tick-borne borreliosis agent samples (more than three times) and a decrease in this indicator for human granulocytic anaplasmosis (1.5 times) as compared with 2010–2012. Investigation of tick infection with the agents of Q fever and tick-borne rickettsioses has not been previously conducted in the region. During the period under review, 19 pools of ticks had mixed infection, which indicates that there are combined foci of bacterial natural-focal infections with vector-borne transmission in the recreation zone of the Stavropol Territory. This necessitates preventive measures and systematical epizootiological surveys in the Caucasian Mineral Waters region

Typhoid vaccines. Historical aspects of typhoid vaccine development, and currently available products

Typhoid fever is an acute infectious disease caused by Salmonella enterica subsp. enterica serovar Typhi (S. Typhi), which is still extremely common in endemic low- and middle-income countries of Asia and Africa. Industrialised countries may also be affected by typhoid fever outbreaks due to booming international tourism, and natural disasters. Given S. Typhi progressive resistance to antibiotics, high epidemiological burden, and lack of adequate sanitation and hygiene in a number of regions, the introduction of new treatment protocols and the improvement of preventive vaccination are critical tasks in global healthcare. The aim of the study was to highlight the main historical aspects of the typhoid vaccine development, to summarise data on the licensed vaccines and promising approaches to the development of new typhoid vaccines. The paper describes the current epidemiological situation of typhoid fever globally and in the Russian Federation. It dwells upon the global experience in typhoid vaccine development from the production of an inactivated vaccine to the development of conjugated vaccines. The paper summarises data on Russian and foreign-made typhoid fever vaccines currently available in the global pharmaceutical market. It outlines the main trends in the development of vaccines against the disease caused by S. Typhi. The paper demonstrates the need for improving the efficacy of existing vaccines and development of new typhoid combination vaccines