30 research outputs found

    Analysis of the transcriptome of human NK lymphocytes

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    Natural Killer cells are large granular lymphocytes that contribute to both innate and adaptive immunity, as they can not only lyse infected cells or tumors, but also stimulate an adaptive immune response via production of cytokines and chemokines. NK cells function at the frontline of defense against intracellular pathogens and transformed cells due to their ability to respond rapidly and without prior sensitization on multiple signals. Traditionally the knowledge about NK cell function and development was obtained mainly from mouse models, transplantations and in vitro studies, but development of high throughput methods of gene expression analysis in the last years shed more light on NK cell developmental and functional diversity as well as on ontological relations between their subpopulations. However, our knowledge about NK cells remains incomplete, especially in comparison to T and B lymphocytes, and many questions in this field are yet to be answered. Together with our collaborators, our group collected an RNA-seq data set that, to our knowledge, is the most complete available for NK cell populations. This data set was comprehensively analyzed to elucidate the specific feature of transcriptomes of developing and mature NK cells. Typical transcription signature of NK cells that distinguishes them from other peripheral blood mononuclear cells (PBMCs) and changes in expression profiles of NK cells during their development was described. In particular, a set of novel genes was identified in which specific expression or function in NK cells was not described before. Differences in expression profiles of NK cells from tissues and functional groups were also described, in particular the relative immature phenotype of bone marrow-derived stage 3 NK populations in comparison to their counterparts in tonsils. Further, more mature and activated phenotype of NK cells produced by in vitro differentiation assays in comparison to their ex vivo counterparts was stated, which can be explained by using a cytokine cocktail for proper growth and development of cells in vitro. In addition, expression levels of non-protein coding genes expressed by NK cells were estimated and the set of non-protein coding genes with regulatory potential in development and function of NK cells (e.g. LINC00299, RP11-222K16.2, RP11-212I21.4, RP11-456D7.1, RP11-121A8.1) was identified. Furthermore, the single cell expression analysis of mature human NK lymphocytes using the microfluidic Fluidigm© technique was established and a pilot experiment was performed, which allows further estimation of heterogeneity level of mature NK cell, identification of their functional subpopulations, and studying of regulatory gene networks within them

    Experimental methods of leadership competence development of future physical education teachers

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    At the present stage, the problem of developing leadership competence of future physical education teachers is relevant, as it is caused by fast-changing transformations which occur in socio-political, economic, cultural, social and educational spheres of Ukraine, in particular, in the field of physical culture and sports. The aim of the study is to develop an experimental methodology for the development of leadership competence of future teachers of physical education. Experimental verification of the methodology for the development of leadership competence of future physical education teachers was carried out using a pedagogical experiment during of 2021–2022 academic year. We selected to participate in the experiment 125 students in Poltava V. G. Korolenko National Pedagogical University and teachers University of Ukoopspilks «Poltava University of Economics and Trade», Poltava State Medical University. Research methods: theoretical; empirical; research work to test the effectiveness of methods for developing leadership competence of future teachers of physical education; methods of statistical data processing. The analysis of tabular data is the basis for the conclusion that there is a positive trend, namely the reduction in the number of students, who demonstrated a low level of development of leadership skills of future physical education teachers in all components and a positive increase in medium and high levels

    Basic characterization of antibodies targeting receptors of the tumor necrosis factor receptor superfamily

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    Many new immunotherapeutic approaches aim on the stimulatory targeting of receptors of the tumor necrosis factor (TNF) receptor superfamily (TNFRSF) using antibodies with intrinsic or conditional agonism. There is an initial need to characterize corresponding TNFRSF receptor (TNFR)-targeting antibodies with respect to affinity, ligand binding, receptor activation and the epitope recognized. Here, we report a collection of simple and matched protocols enabling the detailed investigation of these aspects by help of Gaussia princeps luciferase (GpL) fusion proteins and analysis of interleukin-8 (IL8) production as an easily measurable readout of TNFR activation. In a first step, the antibodies and antibody variants of interest are transiently expressed in human embryonal kidney 293 cells, either in non-modified form or as fusion proteins with GpL as a reporter domain. The supernatants containing the antibody-GpL fusion proteins can then be used without further purification in cell-free and/or cellular binding studies to determine affinity. Similarly, binding studies with mutated TNFR variants enable the characterization of the antibody binding site within the TNFR ectodomain. Furthermore, in cellular binding studies with GpL fusion proteins of soluble TNFL molecules, the ability of the non-modified antibody variants to interfere with TNFL-TNFR interaction can be analyzed. Last but not least, we describe a protocol to determine the intrinsic and the Fc gamma receptor (FcγR)-dependent agonism of anti-TNFR antibodies which exploits i) the capability of TNFRs to trigger IL8 production in tumor cell lines lacking expression of FcγRs and ii) vector- and FcγR-transfected cells, which produce no or only very low amounts of human IL8. The presented protocols only require standard molecular biological equipment, eukaryotic cell culture and plate readers for the quantification of luminescent and colorimetric signals

    Content Analysis of Course Books and Online Courses for Teaching English for Specific Purposes for IT Professionals

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    The paper deals with the issue of English language training for IT professionals at Ukrainian universities. Understanding the importance of studying foreign languages has been confirmed by a number of normative documents. Peculiarities of professional training of IT specialists at higher education institutions with the focus on foreign language training are considered. Pedagogical conditions for formation of the communicative competence of IT professionals are analysed. The content analysis of existing English course books, textbooks and online courses for IT professionals has been conducted to find out the content of foreign language training. It is stated that English language teaching aids in information technology, computer engineering, computing and software engineering can be used in the learning process, however, their use requires thorough refinement and modification. The series of guides, manuals and online courses for teaching English for professional purposes are presented

    Teaching students of economic specialties to collaborate in ESP classes

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    UK: У статті розглядається методика навчання студентів економічних спеціальностей співробітництва як однієї із чотирьох ключових навичок ХХІ століття (4С) у процесі викладання дисципліни «Іноземна мова за професійним спрямуванням». Потреба у розвитку вміння ефективно працювати в команді постає через недостатній зв’язок між вимогами сучасного ринку праці та рівнем підготовки випускників ЗВО. Освітяни та ділова спільнота наголошують на важливості опанування стратегій колаборації ще під час навчання, адже це допоможе підготувати випускників ЗВО більш затребуваними. Хоча педагоги й застосовують співробітництво при викладанні іноземної мови та спільне навчання часто використовується лише як засіб для викладання іншого контенту, а не як метод удосконалення навичок колаборації. У статті проаналізовано стан підготовки здобувачів вищої освіти в Україні, прописано основні передумови для навчання співпраці та розглянуто методи навчання співробітництва при викладанні іноземної мови. Наголошується, що ефективність розвитку зазначеної навички визначається якістю співробітництва викладачів як на етапі укладання освітніх програм, так і в процесі навчання. Наведено результати дослідження, яке було проведене у Таврійському державному агротехнологічному університеті викладачами іноземної мови за професійним спрямуванням. Подано рекомендації до створення умов для продуктивної колаборації студентів на заняттях під час вирішення поставлених проблемних завдань, а також викладено основні вимоги до цих завдань. Подано приклади видів та форм роботи, що сприяють посиленню колаборативних умінь для досягнення спільної мети, та визначено роль викладача як фасилітатора і спостерігача, який не втручається у процес вирішення проблемного завдання, водночас сприяє ефективній співпраці студентів. За результатами дослідження було відзначено суттєве підвищення знань, умінь та навичок студентів і, що не менш важливо, їхньої психологічної готовності до колаборації у майбутній професійній діяльності. Доведено, що навчання співпраці є бажаним і реальним результатом навчання іноземної мови у ЗВО. EN: The article deals with the methodology of teaching students majoring in economic specialties to collaborate as one of the four key skills of the 21st century (4C) while teaching “English for Specific Purposes”. The urge to develop the ability to work effectively in a team arises from the lack of correlation between the needs of the labour market and proficiency level of graduates. Educators and business communities emphasise the importance of mastering collaborative strategies during university studies since this raises graduates’ competitiveness; though teachers use collaboration techniques when teaching a foreign language. Collaborative learning is often used only as a means of teaching other content, not as a method of improving collaboration skills. The article analyses the Ukrainian university graduates’ proficiency level, identifies the basic prerequisites for teaching collaboration and considers the methods of developing collaboration skills in teaching a foreign language. The development of these skills is determined by the collaboration of teachers while planning curricula and in the teaching process. The results of the research conducted at Tavria State Agrotechnological University are presented. The recommendations on how to create the conditions for productive collaboration of students when solving problems are given; the basic requirements for these tasks are specified. Some examples of group work that contribute to enhancing collaborative skills to achieve a common goal are given; the role of the teacher as a facilitator and an observer who promotes students’ effective collaboration is determined. According to the results of the study, a significant increase in students’ knowledge and skills and their psychological readiness to collaborate in their future professional activity, which seems to be more important, was noted. It is proved that teaching collaboration is a desirable result and an achievable goal of learning a foreign language at university

    Особливості формування національного інформаційного простору України: від радянської системи ЗМІ до демократичної моделі

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    Об’єкт дослідження – національний інформаційний простір України від функціонування медійного контенту у радянські часи до демократичної преси сьогодення. Предмет дослідження – вивчення особливостей типології мас-медіа України, їх жанрової парадигми, проблемно-тематичної спрямованості, мовно-стилістично- візуального оформлення. Мета науково-дослідної роботи – розглянути головні типологічної структури засобів масової інформації України в історичному і сучасному аспектах, виявити їх жанрово-тематичний контент, мовно-стилістичні ознаки впливу на аудиторію

    GIFTED CHILD AS A PERSONALITY WITH SGIFTED CHILD AS A PERSONALITY WITH SPECIAL NEEDS IN THE INCLUSIVE ENVIRONMENT OF THE EDUCATIONAL ESTABLISHMENT

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    The article deals with the contradiction between the recognition of gifted children in the theoretical discourse as a category of persons with special educational needs, on the one hand, and the low level of their involvement in the inclusive educational environment at school practice, on the other. The necessity of providing talented individuals the status of an important group of atypical children, whose capabilities disclosing is complicated by the disharmonious type of mental development, high level of claims, a number of social and psychological problems is grounded. The needs and problems of gifted children and the system of social and pedagogical work, aimed forming their subjectivity in terms of inclusive education are defined

    FcγRs and their relevance for the activity of anti-CD40 antibodies

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    Simple Summary Targeting of CD40 with antibodies attracts significant translational interest. While inhibitory CD40 targeting appears particularly attractive in the field of organ transplantation and for the treatment of autoimmune diseases, stimulatory CD40 targeting is the aim in tumor immunotherapy and vaccination against infectious pathogens. It turned out that lack of FcγR-binding is the crucial factor for the development of safe and well-tolerated inhibitory anti-CD40 antibodies. In striking contrast, FcγR-binding is of great importance for the CD40 stimulatory capacity of the majority of anti-CD40 antibodies. Typically, anti-CD40 antibodies only robustly stimulate CD40 when presented by FcγRs. However, FcγR-binding of anti-CD40 antibodies also triggers unwanted activities such as destruction of CD40 expressing cells by ADCC or ADCP. Based on a brief discussion of the mechanisms of CD40 activation, we give an overview of the ongoing activities in the development of anti-CD40 antibodies under special consideration of attempts aimed at the development of anti-CD40 antibodies with FcγR-independent agonism or FcγR subtype selectivity. Abstract Inhibitory targeting of the CD40L-CD40 system is a promising therapeutic option in the field of organ transplantation and is also attractive in the treatment of autoimmune diseases. After early complex results with neutralizing CD40L antibodies, it turned out that lack of Fcγ receptor (FcγR)-binding is the crucial factor for the development of safe inhibitory antibodies targeting CD40L or CD40. Indeed, in recent years, blocking CD40 antibodies not interacting with FcγRs, has proven to be well tolerated in clinical studies and has shown initial clinical efficacy. Stimulation of CD40 is also of considerable therapeutic interest, especially in cancer immunotherapy. CD40 can be robustly activated by genetically engineered variants of soluble CD40L but also by anti-CD40 antibodies. However, the development of CD40L-based agonists is biotechnologically and pharmacokinetically challenging, and anti-CD40 antibodies typically display only strong agonism in complex with FcγRs or upon secondary crosslinking. The latter, however, typically results in poorly developable mixtures of molecule species of varying stoichiometry and FcγR-binding by anti-CD40 antibodies can elicit unwanted side effects such as antibody-dependent cellular cytotoxicity (ADCC) or antibody-dependent cellular phagocytosis (ADCP) of CD40 expressing immune cells. Here, we summarize and compare strategies to overcome the unwanted target cell-destroying activity of anti-CD40-FcγR complexes, especially the use of FcγR type-specific mutants and the FcγR-independent cell surface anchoring of bispecific anti-CD40 fusion proteins. Especially, we discuss the therapeutic potential of these strategies in view of the emerging evidence for the dose-limiting activities of systemic CD40 engagement

    Fn14 and TNFR2 as regulators of cytotoxic TNFR1 signaling

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    Tumor necrosis factor (TNF) receptor 1 (TNFR1), TNFR2 and fibroblast growth factor-inducible 14 (Fn14) belong to the TNF receptor superfamily (TNFRSF). From a structural point of view, TNFR1 is a prototypic death domain (DD)-containing receptor. In contrast to other prominent death receptors, such as CD95/Fas and the two TRAIL death receptors DR4 and DR5, however, liganded TNFR1 does not instruct the formation of a plasma membrane-associated death inducing signaling complex converting procaspase-8 into highly active mature heterotetrameric caspase-8 molecules. Instead, liganded TNFR1 recruits the DD-containing cytoplasmic signaling proteins TRADD and RIPK1 and empowers these proteins to trigger cell death signaling by cytosolic complexes after their release from the TNFR1 signaling complex. The activity and quality (apoptosis versus necroptosis) of TNF-induced cell death signaling is controlled by caspase-8, the caspase-8 regulatory FLIP proteins, TRAF2, RIPK1 and the RIPK1-ubiquitinating E3 ligases cIAP1 and cIAP2. TNFR2 and Fn14 efficiently recruit TRAF2 along with the TRAF2 binding partners cIAP1 and cIAP2 and can thereby limit the availability of these molecules for other TRAF2/cIAP1/2-utilizing proteins including TNFR1. Accordingly, at the cellular level engagement of TNFR2 or Fn14 inhibits TNFR1-induced RIPK1-mediated effects reaching from activation of the classical NFκB pathway to induction of apoptosis and necroptosis. In this review, we summarize the effects of TNFR2- and Fn14-mediated depletion of TRAF2 and the cIAP1/2 on TNFR1 signaling at the molecular level and discuss the consequences this has in vivo
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