National Repository of Grey Literature 39 records found  beginprevious17 - 26nextend  jump to record: Search took 0.00 seconds. 
The effect of intranasal immunization by delipidated Bacillus firmus on immune response in NALT
Hnilicová, Šárka ; Hrdý, Jiří (advisor) ; Hájková, Michaela (referee)
Influenza is a serious illness worldwide, causing high morbidity and mortality. 10-20% of world population fall ill with influenza each year and 250 000 - 500 000 people die annually. The most efficacious protection to date is vaccination. Current vaccines are efficient only one season because of fast mutation rate of influenza virus. The effort to create an effective vaccine faces lack of potent adjuvant, which can adequately stimulate and modulate immune system to protect organism from virus infection. Moreover, todays vaccines administered parenterally do not induce immune response on mucosal surfaces. Bacillus firmus, a Gram-positive non-pathogenic bacterium, has strong immmune-modulating properties and is able to induce cross-protection when administered with influenza virus antigens. Immunization with Bacillus firmus stimulates production of neutralizing antibodies, but other mechanisms of its action remain to be elucidated. To better understand the mechanisms how is antiviral immunity enhanced by Bacillus firmus (delipidated fraction, DBF), the effect of immunization with DBF only was studied on mouse model. In last decade it has become obvious that intranasal immunization can induce both systemic and mucosal immune response and in case of influenza it can induce cross-protection. Therefore...
Immunogenicity of induced pluripotent stem cells (iPSC)
Tejklová, Tereza ; Drbal, Karel (advisor) ; Hájková, Michaela (referee)
Ectopic expression of several transcription factors into the somatic cells allows us to artificially dedifferentiate them into induced pluripotent stem cells (iPSC), which show great promise in regenerative medicine and personalized disease modelling, as well as diagnostic tools. Unique attribute of iPSC is the possibility of creating autologous cells for each patient, which could be used for transplantation without fear of immune rejection. However, cells differentiated from iPSC generally display decreased expression of MHC I glycoproteins, which leads to the activation of NK cells of innate immunity. T cells, the part of adaptive immunity, are activated after recognition of antigen peptide or foreign MHC I glycoproteins only in co-operation with costimulatory molecules, which are not usually expressed on iPSC. During dedifferentiation, cells keep the epigenetic profile of the source cell, which can result in the abnormal expression of genes within derived cell lines. Overall immunogenicity depends on the method of iPSC preparation, with respect to genomic stability. Another important factor is the immune environment of transplantation site as well as the tissue damage caused during transplantation. This results in the presentation of danger signals (DAMPs), which are then recognized by pattern...
Antimicrobial properties of mesenchymal stem cells
Černá, Kristýna ; Hájková, Michaela (advisor) ; Vobořil, Matouš (referee)
Mesenchymal stem cells (MSCs) were first isolated from bone marrow. Since that they were isolated from almost every tissue in the body. MSCs are multipotent cells with many properties including self-renewal, differentiation into the cells of all three germ lines, trophic and immunomodulatory abilities, specific migration to the site of injury and recently discovered antimicrobial properties. This properties make them a good candidate for cell therapy because they can be used in treatment of many diseases including bacterial infections. This thesis brings a summary of all discovered antimicrobial properties of MSCs. It is primarily focused on their direct and indirect antimicrobial effect. The direct effect is mediated by a secretion of antimicrobial substances and the indirect effect includes an impact on the activity and functions of macrophages and neutrophils. Extracellular vesicles derived from MSCs constitute separate chapter because they can have both direct and indirect antimicrobial effect. Keywords: mesenchymal stem cells, antibacterial effect, bacteria, antimicrobial peptides
The therapeutic potential of mesenchymal stem cells in a mouse experimental model
Hájková, Michaela
Due to their immunomodulatory and regenerative potential, mesenchymal stem cells (MSCs) represent a promising therapeutic tool for cell-based therapy, organ transplantation or tissue engineering. To improve clinical applicability of MSCs, new methods to increase their delivery and efficacy have been tested in the latest years but the mechanism of observed alterations has not yet been described. In the present project we focused on studying the effect of several factors that can significantly affect the therapeutic success of MSC-based treatment. Initially, we analysed the therapeutic effect of MSCs applied locally on nanofiber scaffold with incorporated cyclosporine A (CsA) in a mouse model of allogeneic skin transplantation. Our results indicate that application of MSCs in the presence of CsA direct M1/M2 macrophage polarization towards regulatory phenotype. This phenotype switching is accompanied by decreased production of nitric oxide (NO) and interferon  (IFN-) and increase production of interleukin 10 (IL-10), and may result in suppression of the local inflammatory reaction. The next goal of proposed study was to analyse the effect of the treatment based on MSCs combined with immunosuppressive drugs with different mechanism of action on the balance among distinct T cell subpopulations. We...
The therapeutic potential of mesenchymal stem cells in a mouse experimental model
Hájková, Michaela ; Krulová, Magdaléna (advisor) ; Hrdý, Jiří (referee) ; Šírová, Milada (referee)
Due to their immunomodulatory and regenerative potential, mesenchymal stem cells (MSCs) represent a promising therapeutic tool for cell-based therapy, organ transplantation or tissue engineering. To improve clinical applicability of MSCs, new methods to increase their delivery and efficacy have been tested in the latest years but the mechanism of observed alterations has not yet been described. In the present project we focused on studying the effect of several factors that can significantly affect the therapeutic success of MSC-based treatment. Initially, we analysed the therapeutic effect of MSCs applied locally on nanofiber scaffold with incorporated cyclosporine A (CsA) in a mouse model of allogeneic skin transplantation. Our results indicate that application of MSCs in the presence of CsA direct M1/M2 macrophage polarization towards regulatory phenotype. This phenotype switching is accompanied by decreased production of nitric oxide (NO) and interferon  (IFN-) and increase production of interleukin 10 (IL-10), and may result in suppression of the local inflammatory reaction. The next goal of proposed study was to analyse the effect of the treatment based on MSCs combined with immunosuppressive drugs with different mechanism of action on the balance among distinct T cell subpopulations. We...
Different characteristics of cord blood cells of newborns of healthy and allergic mothers
Vlasáková, Kateřina ; Hrdý, Jiří (advisor) ; Hájková, Michaela (referee)
The prevalence of allergy is increasing and it is becoming a serious problem not on- ly in medicine, but also in social and economic terms. The most effective way to minimize the development of allergic diseases is preventive measures. In recent years, many studies have attempted to confirm or rebut the hypothesis that early administration of probiotic bacteria to newborns and pregnant women before birth could have preventive effects on the development of allergy. In the Czech Republic, the probiotic strain Escherichia coli O83:K24:H31 (EC O83), being registered with the State Health Institute for Drug Control under the name Colinfant Newborn, has long been used to prevent allergies and paediatri- cians have long been known and used it against various diarrhoea. The aim of this work was to elucidate the effect of EC O83 on CBMC (cord blood mononuclear cells) and to compare the ability of CBMC of healthy mothers (children with a relatively low risk of developing allergic disease) and allergic mothers (children at high risk of developing allergies) to form cytokines in response to EC O83 stimulation. Phytohemagglutinin was used as a positive control, Escherichia coli Nissle 1917 was used as a reference probiotic strain, which is much more known abroad than EC O83. Cytokine production was detected by...
The role of myeloid dendritic cells in allergic diseases
Navrátilová, Adéla ; Hrdý, Jiří (advisor) ; Hájková, Michaela (referee)
Dendritic cells (DC) of hematopoietic origin can be distinguished into cells originating from the myeloid (mDC) or lymphoid lineage. DCs of both branches are able to uptake the antigens, present their samples to T-lymphocytes and polarize the immune response. Lymphoid line DCs are specialized in fighting viruses and they are an important source of interferon alpha. MDCs, which engage antigens as one of the first cells, play an important role in allergies, which are a current problem. Allergy is defined as an inadequate immune response to environmentally nonharmful antigens, and asthma, allergic rhinitis, atopic dermatitis and food allergy are among the most common allergic diseases. This work focuses on the role of mDC in the pathogenesis of allergic diseases and their possible use in treatment. Furthermore, this paper describes the differences between healthy and allergic individuals in terms of functional changes of mDC and differences between mature and immature immune system. Key words: dendritic cells, allergic diseases, cytokines, newborn immune system
The role of innate lymphoid cells in influenza virus infection
Mouyabi, Flaviancia ; Hrdý, Jiří (advisor) ; Hájková, Michaela (referee)
Innate lymphoid cells (ILCs) are recently discovered group of innate immune cells. They do not have antigen-specific receptors but they can be activated by cytokines similarly to T lymphocytes. ILCs have a crucial role in the regulation of inflammation, tissue repair, containment of commensals, anti-infection immunity and regulation of tissue homeostasis. The presence of mouse and human ILCs can be detected in the lung during and after influenza virus infection when ILC contribute to the restoration of damaged lung parenchyma. ILCs directly or indirectly provide protection against viral infections by secretion of various cytokines and co-operation with other cells (e.g. T cells, macrophages). Overall, lung ILCs are important in immune responses and tissue homeostasis, but further studies on this topic are needed to fully understand their role. The aim of this thesis was to specifically characterize these cells, focus on their function in the lung, and describe their role in the course of influenza virus infection.
Application of an intuition in the managerial decision making
Hájková, Michaela ; Hrůzová, Helena (advisor) ; Pastyřík, Pavel (referee)
This Bachelor's Thesis looks into the intuition and application of intuition in managerial decision making. The theoretical part defines managerial decision making and intuition as technical categories. There are described some results of researches and examples from the real life in this thesis, that prove, that intuition plays an important role in decision making of managers. The practical part is dedicated to the interviews and questionnaires, which are discovering in which way managers feels about deciding, how do the decide, what comes before making the decision and what are the consequences, when managers decide by intuition or by analysis. This thesis tries to certify if intuition is part of managerial decision making or not and what is the role of intuition.
Resocialization of children offenders
Hájková, Michaela ; Matoušek, Oldřich (advisor) ; Hulmáková, Jana (referee)
Presented diploma thesis deals with resocialization of children offenders. It is dedicated to national and international practice in the field of work with violent offender. The objective of the diploma thesis is to find out, what are the basic characteristics of the resocialization programmes and its potential growth. The theoretical part of the thesis defines the basic terminology of offender, victim, resocialization and related areas of care for offenders. The research part is divided into a methodology where the author describes the process of data gathering through semi-structured interviews and empiricism, supported by testimonies of experts working with violent offenders. Key words: resocialization, offender, abused child, work with offenders

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