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Interaction of influenza virus with cell defence mechanisms
Vochyánová, Klára ; Drda Morávková, Alena (advisor) ; Mikušová, Gabriela (referee)
Influenza virus infection is one of the most current problems nowadays. Its unique ability to strongly inhibit cell immune response on many different levels and its pandemic potential make it a subject of interest of many research groups. The Influenza virus uses mainly NS1 protein to inhibit the immune response. NS1 protein is able, on one hand, to bind RNA and mask it against recognition by cellular sensors and other proteins. On the other hand, NS1 protein possesses a catalytic domain. Using this domain it interacts with many cellular proteins, interferes with signal transduction and guarantees successful infection. NS1 protein is one of principal pathogenicity instruments of the Influenza virus and it deserves appropriate attention.
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The role of innate lymphoid cells in influenza virus infection
Mouyabi, Flaviancia ; Hrdý, Jiří (advisor) ; Kössl, Jan (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 ILCs 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.
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DNA/RNA intercalating agents as antivirotics: possible mechanisms of action
Kropáček, Václav ; Španielová, Hana (advisor) ; Šmahelová, Jana (referee)
DNA/RNA intercalating agents are compounds with capability to insert themself between nucleic acids base pairs. This phenomenon is accompanied by structural or functional disruption of said nucleic acid. Some of these compounds are used as therapeutics for cancer, bacterial or parasital infection or are used as antivirotics. This work summarizes different mechanisms which are responsible for antiviral effects of three significant classes of intercalating agents, acridine derivates, quinolines and quinolones. Except for intercalation into nucleic acids, these compounds are also capable of alkalization of cellular organels, inhibition of some viral enzymes (helicase, integrase) and immunomodulation. These abilities enables them to disrupt viral life cycle.
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The role of innate lymphoid cells in influenza virus infection
Mouyabi, Flaviancia ; Hrdý, Jiří (advisor) ; Kössl, Jan (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 ILCs 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.
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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.
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Interaction of influenza virus with cell defence mechanisms
Vochyánová, Klára ; Drda Morávková, Alena (advisor) ; Mikušová, Gabriela (referee)
Influenza virus infection is one of the most current problems nowadays. Its unique ability to strongly inhibit cell immune response on many different levels and its pandemic potential make it a subject of interest of many research groups. The Influenza virus uses mainly NS1 protein to inhibit the immune response. NS1 protein is able, on one hand, to bind RNA and mask it against recognition by cellular sensors and other proteins. On the other hand, NS1 protein possesses a catalytic domain. Using this domain it interacts with many cellular proteins, interferes with signal transduction and guarantees successful infection. NS1 protein is one of principal pathogenicity instruments of the Influenza virus and it deserves appropriate attention.
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Preparedness of the Czech Republic for Pandemic Flu
JURZYKOWSKÁ, Lucie
Influenza illness occures masively in human population for centuries. Influenza is an acute disorder of viral origin. Currently influenza can be found all over the world. The viruses of influenza are circulating continously in all continents not only in the human population, but in animals too. Every year the population is affected by the seasonal epidemic of different magnitude. Influenza illness pose an important medical, social and economical problem. Next to the seasonal outbreaks occuring every year the influenza pandemic can appear after several tens of years. The pandemic of influenza would mean spread all over the world and it is caused by the new variant of the influenza virus. In past the influenza pandemics caused mortality of millions of people all over the world, high economical losses and social collapse of the states in the history. That´s why the particular states prepare their national pandemic plans. The early preparedness for possible influenza pandemic elaborated in the national pandemic plans and the measures following from the plans constitute a tool for reduction of extent, impact and outcomes of pandemic. The quality of preparedness can influence the economical functions of states, medical impacts of illness and final number of the victims. The aim of the dissertation is to compare the proposed measures responding to the influenza pandemic arising from the national pandemic plans of the Czech and Slovak Republic, to ascertain the state of preparedness to the influenza pandemic following from the pandemic plan of the Czech Republic and the situation in awareness of the civil population about the influenza pandemic in the Czech Republic. The theoretical part of the dissertation is focused on the epidemiological characteristic of the influenza illness. In the sphere of interest the issue of influenza pandemics is explained in terms of their history and the next field of the dissertation is focused on the pandemic plans. The research part of the dissertation is focused on the solution to the given research questions. Two research questions were specified to accomplish the defined aim: What are the differences between the approaches and measures in the pandemic plans of the Czech and Slovak Republic? What is the knowledge and awareness of civil population about the influenza pandemic in the Czech Republic? Regarding the issue the methodology the first research question included analysis of the content of the pandemic plans of the Czech and Slovak Republic and performance of the Checklist method in order to obtain an overview on approach, procedures and standard of preparedness in the territory of both states and possibilities their reciprocal comparison. Under the second research question the awareness and knowledge of the civil population about the pandemic influenza in the Czech Republic was investigated. For acquiring the data of researching study there was used The method of quantitative research was used to acquire the data for the research survey. The form of twenty questions was created. The first part of the questionnaire was focused on the general knowledge about influenza and the second part on the influenza pandemic and related measures. The respondents chose from the answers defined in advance. There wasn´t used the random sampling of the respondents. Fifty respondents from the non-representative sample filled out the form for acquiring the basic knowledge and finding out theoretical information about the influenza pandemic. Subsequently the statistical analysis was made from the obtained data using the methods of descriptive and mathematic statistic. It follows from the analysing results that the knowledge about the influenza illness and influenza pandemic exists among the civil population which means the laic public, but they are the lower extent and do not correspond to the normal frequency distribution.
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Implementation of the National Action Plan to increase vaccination coverage against influenza in the district of Trutnov.
KISSOVÁ, Petra
Influenza is a highly contagious viral disease with epidemic and pandemic spread of the character, which annually affects 10% of the world's population, in the course of a pandemic even 40-50%. The originator of the disease is a virus that is present as a type A, type B or type C. Source of infection is the man to transfer air or contaminated objects. Susceptibility is widespread. The disease predominantly affects the respiratory tract, has a sudden beginning and manifests itself primarily with fever, chills, muscle pain, joint pain and headache. The most common complication is inflammation of the lungs. In the diagnosis are rapid tests for the detection of the Antigen. Treatment is symptomatic, antivirals are available the type of neuraminidase inhibitors M2, which easily gives rise to a resistance of influenza virus. The basis for the prevention of influenza is annual vaccination, which dramatically reduces the risk of hospitalization and death, especially among the elderly and the chronically ill. Coverage in our population is low, and that despite the fact that the flu is the cause of the deaths of thousands of people around the world. A year in the Czech Republic will die according to qualified estimates the flu one to two thousand people. Due to the possible prevention of influenza, it is important to disseminate information on the possibilities of prevention by vaccination and educate the general public about the seriousness of this disease. Diploma thesis discusses influenza disease as such and on the issue of vaccination against influenza among the elderly in connection with the adoption of the NAP to increase vaccination coverage against the flu. The theoretical part summarises the commonly known knowledge on the causative agent of the disease, the way of transmission, symptoms, diagnosis, complications, treatment, and prevention by vaccination.
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A new variation of influenza A ("Pandemic H1N1 2009") - the issue of awareness of vaccination among seniors.
BEČKOVÁ, Věra
The theme of my thesis is the issue of the new strain of influenza A (H1N1 Pandemic 2009) and the associated awareness of vaccination amongst the elderly. The work is divided into two parts, a theoretical and practical part. In the theoretical part, I tried to comprehensively process the available knowledge on the origins, epidemiology and prevention of influenza with particular emphasis on vaccination, oriented towards the elderly. The practical part is focused on mapping the awareness of the elderly of the issue of vaccination against influenza and analysis of results from a research exploratory investigation. The data acquisition method I used was quantitatively oriented research using anonymus questionnaires. Altogether, I distribued 350 questionnaires; the final number for data processing was 191 questionnaires. In connection with the work I set four hypotheses: 1) More than a third of respondents were vaccinated against the new strain of influenza A (H1N1 Pandemic 2009), 2) The most common reason for not being vaccinated was a lack of information. 3) The size of the place of residence significantly contributes statistically to a sense of awareness of respondents on this issue, 4) More than half of respondents would like to obtain more information on the issue of the new strain of influenza type A (Pandemic H1N1 2009). I confirmed or refuted the formulated the hypotheses based on survey evaluation. The results of the survey showed that most respondents do not feel that they are sufficiently informed about the issue of the new strain of influenza, and therefore discard the use of vaccinations. With this work I would like to stress the importance of information, which can help people consider the risks of influenza and motivate them to be vaccinated. Vaccination is an important means of protection against influenza viruses particulary for high-risk groups including the elderly. For this reason I consider the dissemination of information as very important and I hope that my thesis also serves this purpose.
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