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Selected genetic factors modifying the natural course of viral infections in organ transplant settings
Chmelová, Klára ; Šperl, Jan (advisor) ; Husa, Petr (referee) ; Brůha, Radan (referee)
Solid organ transplantation (SOT) represents a life-saving procedure and a future perspective for patients suffering from organ failure. On the other hand, SOT recipients are burdened with numerous complications, including infections or lifelong administration of immunosuppressive medication. There are several well-known factors related to graft and patient survival, including general health status, age at the time of SOT, diagnosis leading to SOT, acute or antibody-mediated rejection, development of the metabolic syndrome and complications including viral diseases. Viral infections in SOT recipients may present with a very distinct natural history compared with the healthy population. Several can cause immune activation leading to graft rejection; others can be associated more likely with immune tolerance. We aimed to identify the impact of variants of selected genes on the natural history of various viral diseases in SOT recipients and thus their overall outcome, morbidity and graft survival. Cytomegalovirus (CMV) infection is the most common viral infection in SOT recipients. We focused on the role of the IL28B rs12979860 locus genotype in the risk of CMV disease occurrence. We proved the T allele is associated with a more frequent occurrence of CMV disease in liver transplant (LTx) recipients...
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Droplet-borne infections: knowledge, attitudes and behavior of pupils of the lower secondary school
Kašpárková, Kateřina ; Pavlasová, Lenka (advisor) ; Hlaváčová, Lucie (referee)
The diploma thesis deals with droplet infections and finds out what knowledge, attitudes and behavior pupils of the lower secondary school have towards them. The theoretical part focuses on educational documents in the Czech Republic, including the occurrence of topics about droplet infections in RVP ZV, didactic game as a teaching method and a detail description of selected viral and bacterial droplet infections. In the practical part, the diploma thesis finds out what knowledge, attitudes and behavior students have about droplet infections. Subsequently, a didactic game is performed and the effectiveness of the didactic game is evaluated by comparing the pre-test and the post-test on the basis of changes in the knowledge, attitudes and declared behavior of the interviewed pupils. The results showed that due to the didactic game there was an improvement in the students knowledge and a desired change of attitudes. The declared behavior of students remained unchanged, as the entry level of students in this area was already at a high level.
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Pathologic STAT3 signalling pathway activation in cancer and viral diseases.
Podestátová, Barbora ; Reiniš, Milan (advisor) ; Škarková, Aneta (referee)
STAT3, one of the seven members of STAT protein family, is able to transduce signal into the nucleus, where it binds to specific DNA sequences and acts as a transcription factor. Under physiological conditions, STAT3 regulates genes associated with number of functions such as cell proliferation, differentiation, apoptosis or immune response. In the case of pathological conditions, STAT3 can be dysregulated or constitutively activated, which may result in cancerogenesis. During this process, STAT3 is frequently activated directly in tumor cells where it acts tumorigenically. STAT3 is also associated with inflammatory reactions mediated by immune cells, which along with tumor and stromal cells are involved in the formation of the tumor microenvironment. The role of STAT3 is also important in the fight against viral infections, and when STAT3 activated aberrantly, it can lead to chronic diseases, including cancer. Due to these serious roles during pathogenesis, STAT3 is the subject of research of various inhibitors that either directly inhibit the STAT3 molecule function or indirectly any of the components of its signaling pathway.
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MicroRNAs in Human Cancers Associated with Viral Infections
Dvořáková, Lucie ; Tachezy, Ruth (advisor) ; Drda Morávková, Alena (referee)
MicroRNA (miRNA) are short single-stranded RNAs that do not encode proteins. Their main function is the regulation of the gene expression on the level of translation. This regulation is mediated by the binding of miRNA to the partially complementary segments of mRNA, both cellular or viral. It is estimated that miRNAs affect expression of at least one third of human genes and thereby influence regulation of cellular growth, differentation and apoptosis of cells. Recently the miRNAs encoded mainly by DNA viruses were discovered. These miRNAs enhance the persistence of viral infection in the host and can contribute to malignant transformation. However, the oncogenesis is also significantly affected by the regulation of cellular miRNAs expression by viral proteins. The miRNA research is topical. MiRNAs are considered as potential biomarkers and their utilization as a cancer therapy is being intensely explored. In this thesis, I'm describing the biogenesis and regulatory functions of miRNAs. I'm also presenting an overview of viral miRNAs focusing on human oncogenic viruses which do not only code their own miRNAs but also influence the expression of the host miRNAs. Finally, I am focusing on current clinical applications of miRNA. Key words: viral miRNA, cellular miRNA, oncogenesis, viral infections,...
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