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Study of glycocluster prophylaxis on bacterium adherence model
Áčová, Andrea ; Hodek, Petr (advisor) ; Kubíčková, Božena (referee)
Cystic fibrosis (CF), as autosomal-recessive inherited disease caused by mutation in CFTR gene, induces an ion channel disorder which triggers big amount of CF patients' health problems. The gravest are complications associated with the respiratory system. Accumulation of thick mucus and altered glycosylation in lung lead to increased adherence of bacterial cells, mainly Pseudomonas aeruginosa (PA) and Burkholderia cepacia complex, to lung epithelial cells of CF patients. The presented thesis, focusing on one of the virulence factors of PA, the PA-IIL lectin, studies the adherence of the PA control strain (PAK; ST 1763) under the influence of anti-PA-IIL chicken IgY antibodies and multivalent glycoconjugates based on fucose, to lung epithelial cells collected from healthy person (NuLi-1) and CF patient (CuFi-1). Before the adherence testing, the presence of PA-IIL in PAK culture was checked by "Western Blotting" followed by immunodetection. For quantitative evaluation of the adherence testing, both lung epithelial and bacterial cells were first fluorescently labeled with PKH dyes. The results of spectrofluorimetric measurement after the adherence testing were also compared to microscopic observation of PAK adherence. Different fractions of chicken anti-PA-IIL antibodies from egg yolks showed...
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Impact of Immunonutrition on the Patients With Cystic Fibrosis
Hloch, Ondřej ; Charvát, Jiří (advisor) ; Kohout, Pavel (referee) ; Rušavý, Zdeněk (referee)
The impact of immunonutrition in patiens with cystic fibrosis Abstract The aim of the study was to evaluate the application of immunonutrition in adults with cystic fibrosis (CF) and malnutrition, who have been receiving enteral nutrition in the form of standard sipping for at least a year. In 30 adult patients, immunonutrice (Impact) was given for 8 weeks. After 8 weeks, patients returned to standard nutritional support. The application of immunonutrition led to a significant reduction in systolic blood pressure and heart rate, to an increase in glomerular filtration and significant changes in the plasma aminoacidogram. Serum amyloid-A (SAA) levels decreased significantly and increased again after the intervention. However, immunonutrition administration was associated with an increase in serum malonyldialdehyde, a decrease in serum glutathione peroxidase and selenium. Thus, administration of immunonutrition led to an increase in oxidative stress, but almost all values remained within physiological limits. At 6-year follow-up, the long- term prognosis in the multivariate analysis depended only on baseline FEV1 and the degree of pulmonary involvement, respectively. The frequency and duration of subsequent hospitalizations and long-term prognosis were significantly associated with plasma fibrinogen levels....
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Detection of early pathophysiological changes of breathing in children with chronic respiratory disease
Koucký, Václav ; Pohunek, Petr (advisor) ; Rybníček, Ondřej (referee) ; Chlumský, Jan (referee)
Detection of early pathophysiological changes of breathing in children with chronic respiratory disease MD. Vaclav Koucky - Ph.D. thesis Abstract Introduction: Currently, there are different methods for infant pulmonary function testing (iPFT) and morphological assessment of microscopic changes in endobronchial biopsy samples (EBB). In research setting, they allow detection of early pathophysiological changes of breathing in small children with chronic respiratory disease, respectively in risk of its development. Their clinical significance, however, is not fully acknowledged. The aim of this thesis is to evaluate the safety, feasibility and clinical significance of iPFT and EBB in infants younger than 2 years of age. In addition, the relationship between functional and morphological changes of respiratory tract and the function of peripheral chemoreceptors was studied in selected patients' subgroups. Methods: Fifty-five infants with cystic fibrosis (CF), 35 physician-confirmed recurrent wheezers (AB), 9 infants with congenital diaphragmatic hernia, 7 with interstitial lung disease (chILD) and 3 with primary ciliary dyskinesia (PCD) were enrolled. All infants underwent iPFT and relevant clinical history data were recorded. Based on patients' age, CF group was divided into CFmalí (< 6 months) and CFvelcí (>...
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Development of model system for study of bacterial adhesion on lung epithelium of CF patients
Nosková, Libuše ; Hodek, Petr (advisor) ; Švédová, Martina (referee)
Cystic fibrosis is an inherited disease bearing a number of health difficulties. The main complication is a chronic colonization and infection of respiratory tract with specific microorganisms - especially Pseudomonas aeruginosa. The lung infection with this microorganism is the most common cause of all of death in these patients. The colonization of respiratory tract is mediated by the series of adhesive structures such as lectin PA-IIL. Currently, the most widely used therapy is an antibiotic treatment. Due to the increasing resistance to antibiotics another methods for treatment are being searched. One possibility is a passive immunization of patients with chicken antibodies. For this purpose, we prepared antibodies against one of the adhesive structures of P. aeruginosa - recombinant lectin PA-IIL. These antibodies be able to recognize a native lectin PA-IIL, expressed by P. aeruginosa. To test the ability of antibodies to prevent adhesion of bacteria on the lung epithelial cells a suitable model system was necessary to develop. The basal components of this system include epithelial cells and P. aeruginosa. Epithelial cells from airways of cystic fibrosis patient were isolated by two methods. One method is based on the direct isolation from the dissected tissue and the second one is a brushing...
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Prenatal diagnostics of cystic fibrosis and diseases associated with trinucleotide expansions - teaching at secondary schools
Nováková, Stanislava ; Ehler, Edvard (advisor) ; Pavlasová, Lenka (referee)
Cystic fibrosis and diseases associated with trinucleotide expansions are serious hereditary disease that serves in my Diploma thesis as role models suitable for teaching interesting topics of human genetics at secondary schools. By using appropriate methods of prenatal genetic treatment, it is possible to make a diagnosis of the developing fetus and to determine a corresponding prognosis in next prenatal and postnatal development in families at risk. The practical part of the thesis is devoted to the content analysis of biology schoolbooks for secondary schools and to the preparation of a prototype class of genetics at secondary schools. The aim of the content analysis of biology schoolbooks for secondary schools is the evaluation of various textbooks according to several preselected criteria. The aim of the presentation of the proposed prototype class was to determine, based on the responses obtained from the questionnaires, whether pupils of higher grades of secondary schools are interested in the subject matter of genetics, to find out what engaged their attention the most during the lessons or what they did not understand and what they considered as difficult. The lesson was conducted as a specialized seminar, the teaching method was a lecture. From the selected biology schoolbooks for...
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Molecular characterization of resistance to MLSb antibiotics in Staphylococcus aureus and SCV Staphylococcus aureus strains of cystic fibrosis patients
Vařeková, Eva ; Melter, Oto (advisor) ; Zikánová, Blanka (referee)
Cystic fibrosis (CF) is the most common autosomal recessive genetic disorder in Caucasians. Lower respiratory tract of CF patients is colonized by specific bacteria, often leading to chronic infection and lung tissue damage. In this thesis we characterized 338 isolates of S. aureus from 92 Czech CF patients isolated in 2011-2013. Using spa typing and PFGE we detected high clonal heterogenity of this collection with the exception of MRSA strains (resistant to oxacillin; 5% prevalence) which were clonally related. The prevalence of S. aureus MLSB resistance in our collection was high (69 %), which is a serious problem due to common usage of these antimicrobials in clinical practice. A half of the MLSB resistant strains lacked any known determinant of this resistance (ermA, ermC, ermT, msrA). Sequencing of the ribosomal genes revealed a high number of S. aureus strains carrying target site mutations resulting in MLSB resistance (37 %). This is new important information about the staphylococcal strains associated with chronic infections in Czech Republic. Focusing on mutability of analysed strains, we also detected several strains with point mutations or deletions in their mutator genes mutS a mutL. Hypermutability could be responsible for the high rate of ribosomal mutations and for the presence of...
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Utilization of new generation sequencing methods to elucidate cystic fibrosis-like phenotype at patients with unclear illness of molecular type.
Matějčková, Iva ; Macek, Milan (advisor) ; Holá, Dana (referee)
Cystic fibrosis (CF) is genetically conditioned, autosomal recessive disease that occurs in the European population with a prevalence of about 1:2500 - 1:1800. In this disease we observe a mutation of the CTFR gene with subsequent fault in chloride channels. Such afflicted individuals usually suffer from chronic respiratory problems, pancreatic insufficiency, high concentration of chloride ions in sweat and obstructive azoospermia. Genetic testing of CFTR gene is indicated in individuals who meet the CF clinical picture and a positive sweat test (increased concentration of chlorides in the sweat). Genetic testing of the CFTR gene is usually done by using commercial kits detecting the most common mutations of the CFTR gene in the Czech Republic. If the testing results are negative, it is further performed an MLPA method that captures the larger deletions and duplications of gene, eventually a sequencing of all exons is. Despite the well-established algorithm of the testing, some patients suffering from symptoms of CF are left without genetic findings. Thanks to development of next generation sequencing, it is possible to make the diagnosis of CF more effective and uncover the variants that were not captured by previous methods.
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