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Comparative and phylogenetic analysis of viruses in the University Hospital Brno
Švestková, Tereza ; Sedlář, Karel (referee) ; Nykrýnová, Markéta (advisor)
This thesis is focused on the SARs-CoV-2 coronavirus associated with severe acute respiratory syndrome, which was first identified in 2019. This coronavirus caused a pandemic that affected almost the entire world. Knowledge of the genetic information is needed for vaccine development, to determine infectivity and to predict the evolution of SARs-CoV-2 variants. To obtain genetic information, RNA must be sequenced and these genomic sequences must be assembled. By comparing the assembled genomes, it is possible to find out which part of the organism has mutated. Phylogenetic analysis is performed on the basis of the concordance or divergence in the assembled genomes, which indicates the evolution of the organism and shows the evolutionary relationship with other organisms. The practical part is focused on the assembly of genomes from samples from patients in the University Hospital Brno and evaluation of the quality of the assembly. After the genomes are assembled, the next goal is to evaluate the variability and subsequent phylogenetic analysis.
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Analysis of coronavirus by QRT-PCR and possible therapy by nanoliposomal carriers of recombinant antigens
Krchová, Lenka ; doc. RNDr. Milan Bartoš. Ph.D. (referee) ; Turánek, Jaroslav (advisor)
This thesis deals with the study of coronaviruses, their diagnostics and subsequently the possible construction of a recombinant vaccine based on liposomal carriers of recombinant antigens. The experimental part of the thesis touches upon two levels. First, the diagnosis of SARS-CoV-2 virus was measured and investigated by real-time PCR. Biological material of a large number of patients was worked with. Together with the basic determination of the presence of the virus, the stability of the viral particle over time, its resistance to temperature changes, the effect of dilution of the carrier medium on the Ct value and other sub-experiments were investigated. From all the metadata, the most useful variant for pathogen diagnosis is finally evaluated. The experimental part is then followed by a possible therapy with recombinant vaccines. This issue is very topical and moves the whole professional community. Liposomes have been prepared which serve as carriers of bioactive substances in recombinant vaccines. The liposomes were homogenized by extrusion to the desired size and variously surface modified. Antigen binding, stability over time and possible degradation were investigated. Liposomes were characterized by DLS, nanoflow cytometry and electron microscopy.
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Study the potential of chicken anti-peptide antibodies as means of viral infection prophylaxis
Wojčíková, Lenka ; Hodek, Petr (advisor) ; Kubíčková, Božena (referee)
In 2020, the WHO declared a global pandemic due to the disease COVID-19, which is caused by the SARS-CoV-2 virus. This virus uses the binding of a surface 'spike' protein to the affected cell's ACE 2 receptor to enter the cell. Vaccination therefore aims at inducing the production of antibodies that inhibit the virus binding. Alternatively, antibodies can be obtained from other organism and used as a means of passive immunisation against COVID-19 disease. The aim of the work was therefore to prepare chicken antibodies, IgY, that would be able to prevent the virus from binding. For the preparation of peptide immunogens, appropriate amino acid sequences have been selected from the RBD domain of SARS-CoV-2 S1 protein, which interacts with the ACE 2 receptor. The synthesized peptides were coupled with the KLH protein carrier, and the resulting conjugate was used to immunize hens. Subsequently, the IgY produced was isolated from the egg yolks and their ability to recognise selected peptides in different types of antigens was demonstrated using the ELISA method. After that, the protective properties of antibodies against the virus were tested ex vivo in cell lines and their efficiency was compared to that of Remdesivir. The antibodies were able to inhibit virus binding to cells in the assays, but the...
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SARS-CoV-2 in Care Home Břevnice
Myslivcová, Lenka ; Andrýs, Ctirad (advisor) ; Jankovičová, Karolína (referee)
The aim of this diploma thesis was to describe information about SARS-CoV-2 virus and coronavirus disease (COVID-19), to evaluate the course of the disease in the Home with a special regime in Břevnice, in which the epidemic took place at the beginning of the first wave of COVID-19 pandemic in spring 2020. Another goal was to perform an antibody analysis and evaluate the obtained data. I divided the diploma thesis into three main parts: theoretical, experimental and discussion. In the theoretical part, I worked with the literature and described information related not only to COVID-19, but also to other serious infections caused by human coronaviruses. In the experimental part, which I performed in the immunological laboratory of the Department of Joint Laboratories at Havlíčkův Brod Hospital, I dealt with the issue of the clinical course of the disease, the severity of the disease and possible consequences after the infection. I also dealt with methods for the determination of antibodies, the principles of which are described in Chapter 4.5. The diagnostic methods and procedures used are described in Chapter 5.3 Laboratory Assays. From the obtained data, I prepared graphs and tables and processed data on the clinical course of the infection in the Břevnice Home, both for the clients and the...
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Distance form of teaching physical education during the pandemie SARS-CoV-2
Čudová, Martina ; Vindušková, Jitka (advisor) ; Červinka, Pavel (referee)
Title: Distance form of teaching physical education during the pandemic SARS- CoV-2. Aims: The aim of this work was to determine the course and provision of physical education in the time of the SARS-CoV-2 pandemic from 1 January 2020 to 31 December 2020. Methods: An online questionnaire was used to write the work, which was shared with teachers via social networks and via email. CAWI method was used for data collection. The data were subsequently processed using MS Excel 2013. Results: The results show that in the spring the teaching of physical education took place much less and less often than in the autumn. In the spring, the teachers did not yet have such technical equipment compared to the autumn, and the teaching took place mainly in an offline form. In the autumn, more teachers taught online, focusing mainly on motivating children to move. In the spring part, the teaching was more theoretically focused. Respondents agreed that a failure in physical education will have a major impact on children's development in the future. Keywords: SARS-CoV-2, distance learning, physical education, government measures, pandemic
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Breastfeeding in the COVID-19 era
Brožková, Adéla ; Laštůvka, Zdeněk (advisor) ; Černý, Andrej (referee)
Bachelor thesis is focused on breast-feeding and midwife competences and her irreplaceable care in life of nursing woman. Thesis is based as theory-practice work. Goal of theoretic part is to summary the knowledge of nursing with specific focus on COVID-19 disease and its disadvantage on nursing women. Practical part of the thesis is based on results from medical documentation of monitored homogenous group of woman, with added conclusions data from questionnaires addressed to this homogeneous group of woman. Thesis monitors differences in fully nursed newborns, partially nursed newborns with artificial nutrition on side and newborns fully nourished by artificial nutritious. Data were followed during leave from the maternity yard, after three months and after six months. Reported data were compared between control year 2019 and monitored year 2020, when world was flooded by COVID-19 disease which resulted in various limitations during hospitalisations. Thesis also examine bonding and its effect on nursing woman. Statistics methods fully supported first hypothesis, as no significant differences between nursing women leaving from hospital were reported in year 2021 versus control year 2019. Other two hypothesis were rejected, as statistical data showed that in third and sixth month after childbirth...
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Immune reactions induced by SARS-CoV-2 infection
Krausová, Kateřina ; Šmahel, Michal (advisor) ; Šroller, Vojtěch (referee)
Coronavirus disease 2019 (COVID-19) pandemic caused by newly discovered Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes severe health and economic problems all over the world. The disease severity depends mainly on the host's immune response to SARS-CoV-2. This virus uses many mechanisms for escape from the host's immune system. The major evasion mechanisms include suppression of interferon production at the early phase of infection, exhaustion of natural killer cells and induction of a cytokine storm. After the innate immune response, mechanisms of adaptive immunity join the defense against the virus. Patients with severe cases have a significant reduction in the amount of both helper CD4+ T cells and cytotoxic CD8+ T cells. On the contrary, these patients have an increased level of antibodies. Even though there have been many findings about immune reactions to SARS-CoV-2 in the year after its discovery, there are still many unknowns. Vaccines, which are successful at preventing COVID-19, have been developed in a short time. However, an important remaining question for further research is the longevity of immune memory after vaccination or after suffering from COVID-19.
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SARS-CoV-2 methyltransferases as druggable targets
Kocek, Hugo ; Nencka, Radim (advisor) ; Bouřa, Evžen (referee)
Novel coronavirus (earlier referred to as "nCoV2019") became part of our lives in March 2020 and overnight turned everything upside-down. This virus is transmitted via respiratory droplets and causes respiratory diseases COVID-19 which can be severe and even fatal. So far, no effective treatment has been discovered and vaccination is our biggest hope thanks to its high efficacy. It is important to point out, that new mutations may possess problems and escape immunity induced by the vaccination. During the whole pandemic, many approved drugs were tested against SARS-CoV-2 (for example favipiravir, toremifene, and hydroxychloroquine) but none of those drugs showed to be effective against SARS-CoV-2 in clinical trials. The only approved antiviral drug is nucleotide analog remdesivir which showed significant efficacy against SARS-CoV-2 in clinical trials. However, timing and overall patient's health condition play a key role. Development of new antiviral drugs is necessary given the fact that this is the third time we face coronavirus with the potential to cause pandemic since the beginning of the 21st century. Therefore, it is likely that another new coronavirus will emerge. This thesis focuses on S-adenosylmethionine-dependent methyltransferases nsp14 and nsp16 from SARS-CoV-2 because they play a key...
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Epidemiological modeling of Covid-19
Schubert, Richard ; Kašpar, Jakub (referee) ; Mézl, Martin (advisor)
This thesis deals with the continuous epidemiological deterministic compartmental models and the COVID-19 pandemic modeling distinctive features. The effect of different probability distributions of individuals stay in compartments is studied numerically in relation to basic reproductive number and the final size of the epidemic, respectively. New model for a retrospective analysis of the first half of 2020 northern Italy epidemiological data is proposed. The model parameters estimation is performed using minimisation of weighted sum of squared residuals and the search through parameter space with BFGS algorithm implementation.
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