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Geometric Semantic Genetic Programming
Končal, Ondřej ; Bidlo, Michal (referee) ; Sekanina, Lukáš (advisor)
This thesis examines a conversion of a solution produced by geometric semantic genetic programming (GSGP) to an instantion of cartesian genetic programming (CGP). GSGP has proven its quality to create complex mathematical models; however, the size of these models can get problematically large. CGP, on the other hand, is able to reduce the size of given models. This thesis combinated these methods to create a subtree CGP (SCGP). The SCGP uses an output of GSGP as an input and the evolution is performed using the CGP. Experiments performed on four pharmacokinetic tasks have shown that the SCGP is able to reduce the solution size in every case. Overfitting was detected in one out of four test problems.
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Disposition of New Synthetic Drugs in The Organism. Pharmacokinetics and Biotransformation Study. Toxicological Detection in Biological Materials.
Židková, Monika ; Balíková, Marie (advisor) ; Šustková, Magdaléna (referee) ; Šanda, Miloslav (referee)
The object of this thesis was the study on the pharmacokinetics and biotransformation of selected abused new synthetic drugs, specifically belonging to cathinone and aminoindane groups, in experimental rats. This work consisted of two parts: a biotransformation study of mephedrone, methylone, 5,6-methylenedioxy-2- aminoindane (MDAI) and a distribution profile study of mephedrone, methylone, MDAI and naphyrone. This document is presented as a commentary to the original papers, which were published in peer reviewed journals. The samples of blood and tissue (brain, lungs, liver) were taken at specific times after a subcutaneous single bolus dose of the studied drugs. The urine samples for the biotransformation studies were collected over a 24-hour period following the sc. dose. The LC/HRMS method was used for metabolite detection and quantitative analysis. Our findings not only included testing metabolites of the aforementioneddrugs against the synthesized reference standards, but also discovering previously unknown metabolites of these drugs. Ten phase I and five phase II metabolites aside from the parent drug were identified in urine after mephedrone administration by comparison of their spectra against those of reference standards and/or MS2 spectra of previously identified metabolites. The main...
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The pharmacokinetics of isoflavonoides
Ungerová, Lucie ; Pourová, Jana (advisor) ; Mladěnka, Přemysl (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology & Toxicology Student: Lucie Ungerová Supervisor: PharmDr. Jana Pourová, Ph.D. Title of diploma thesis: The pharmakokinetics of isoflavonoids The aim of this diploma thesis is to summarize currently available informations about the pharmacokinetics of the polyfenolic compounds from a large group of flavonoids, isoflavonoids. Isoflavonoids are coumpounds found in many plant families, but especially in some members of Fabaceae family. One of the main well-known sources are soy beans containing the most famous isoflavones - genistein and daidzein, their pharmakokinetics is the main theme of this diploma thesis. Since isoflavonoids are mainly contained in the diet, their oral administration is very relevant. Isoflanonoids in the human diet occurs predominantly in the form of glykosides and therefore, after ingestion, they have to be deglycosylated by β- glucosidase enzyme family to aglycones. After that they are able to pass through the intestine into the systemic circulation and they are available for action. This is already happening in the oral cavity and the absorption occurs in the small intestine. The intestinal bacterial microflora composition is also very important for pharmacokinetics, for example I can mention...
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Study on interaction potential of maraviroc with drug transporters ABCB1 and ABCG2
Erbenová, Kateřina ; Čečková, Martina (advisor) ; Červený, Lukáš (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology & Toxicology Student: Kateřina Erbenová Supervisor: PharmDr. Martina Čečková, Ph.D. Title of diploma thesis: Study of interactions antiretroviral drug maraviroc with drug transporters ABCB1 and ABCG2. Maraviroc is inhibitor of CCR5 HIV virus entry into the cells representing one of the important components of antiretroviral therapy. To optimize the treatment strategies and minimize the therapeutic risks of maraviroc-containing combination antiretroviral therapy, it is important to know the interactions of this drug with other antiretrovirals. In particular, interaction on membrane transporters may affect pharmacokinetics and thereby the tissue concentrations of administered drugs, leading to insufficient efficacy of the therapy or increased toxicity. The aim of this study was to experimentally evaluate interaction of maraviroc with the two most important active drug transporters of the ABC transporter superfamily, ABCB1 (P-glycoprotein) and ABCG2 (BCRP). Using in vitro methods employing cell lines we aimed to fulfil two main goals: (1) to evaluate the inhibitory effect of maraviroc on ABCB1 and ABCG2 transporters and (2) to study if any of these transporters could transfer maraviroc as their substrate. The data...
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Factors affecting drug distribution and elimination and their application in personalized pharmacotherapy.
Šíma, Martin ; Slanař, Ondřej (advisor) ; Juřica, Jan (referee) ; Tesfaye, Hundie (referee)
The aim of this dissertation thesis was to study the factors affecting drug distribution and elimination and to use these factors to individualize dosing. The work consists of three thematic areas: estimation of the volume of distribution and subsequent dosing of selected drugs (vancomycin, amikacin, phenobarbital) using body size descriptors; estimation of clearance and subsequent dosing of selected drugs (vancomycin, amikacin, phenobarbital, perindopril) using renal function status markers; and the impact of drug interactions on the distribution and elimination of phenobarbital. The thesis summarizes original papers on these topics. Individual pharmacokinetic parameters were calculated for each patient based on their demographic and clinical characteristics, dosing records and measured serum drug levels. The relationships between distribution volume/drug clearance and body size descriptors/renal functional status markers were examined by regression analysis. Vancomycin volume of distribution was best predicted by the total body weight. Loading dose of 10.7 mg/kg of total body weight was optimal in patients taking continuous vancomycin and would lead to reducing of median time to reach target concentrations from 17 to 1 hour. On the contrary, amikacin volume of distribution was most associated...
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Study on interaction potential of maraviroc with drug transporters ABCB1 and ABCG2
Erbenová, Kateřina ; Čečková, Martina (advisor) ; Červený, Lukáš (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology & Toxicology Student: Kateřina Erbenová Supervisor: PharmDr. Martina Čečková, Ph.D. Title of diploma thesis: Study of interactions antiretroviral drug maraviroc with drug transporters ABCB1 and ABCG2. Maraviroc is inhibitor of CCR5 HIV virus entry into the cells representing one of the important components of antiretroviral therapy. To optimize the treatment strategies and minimize the therapeutic risks of maraviroc-containing combination antiretroviral therapy, it is important to know the interactions of this drug with other antiretrovirals. In particular, interaction on membrane transporters may affect pharmacokinetics and thereby the tissue concentrations of administered drugs, leading to insufficient efficacy of the therapy or increased toxicity. The aim of this study was to experimentally evaluate interaction of maraviroc with the two most important active drug transporters of the ABC transporter superfamily, ABCB1 (P-glycoprotein) and ABCG2 (BCRP). Using in vitro methods employing cell lines we aimed to fulfil two main goals: (1) to evaluate the inhibitory effect of maraviroc on ABCB1 and ABCG2 transporters and (2) to study if any of these transporters could transfer maraviroc as their substrate. The data...
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Evaluation of rationality and risks of pharmacotherapy in older patients in long-term care facilities
Lukačišinová, Anna ; Fialová, Daniela (advisor) ; Alušík, Štefan (referee) ; Paluch, Zoltán (referee)
Objectives Main objectives of this doctoral thesis were to review available information on pharmacological properties of benzodiazepines and their age-related changes; to evaluate the prevalence of benzodiazepine use in older patients residing in long term care facilities; to investigate the association between use of benzodiazepines and occurrence of falls in acutely hospitalized older patients; and to describe utilization of benzodiazepines in the Czech Republic. Methods A narrative review of literature focused on pharmacokinetics, pharmacodynamics, adverse effects and association of benzodiazepines with falls in older population was conducted. The evaluation of benzodiazepine use in long term care facilities was analysed in a retrospective cross-sectional study using data from the EC 7th Framework Program SHELTER project (Service and Health in the Elderly in Long Term Care). A prospective cohort study data of acutely hospitalized patients in Australia were used to evaluate association between benzodiazepines and falls. To describe utilization of benzodiazepines in the Czech Republic, data from the State Institute for Drug Control and from databases of General Health Insurance Fund were used. This dissertation thesis is a summary of published articles from above stated works and analyses. Results...
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Application of Mass Spectrometry for Analysis of Biologically Active and Clinically Significant Compounds.
Štícha, Martin ; Jelínek, Ivan (advisor) ; Smrček, Stanislav (referee) ; Tůma, Petr (referee)
- 8 - ABSTRACT (EN) The thesis is submitted as a commented set of reviewed publications documenting and depicting the possibilities of mass spectrometry in the field of chemical, biological and pharmaceutical research; namely for the purposes of structure elucidation of selected organometallic complexes, analyses of drugs and their metabolites, monitoring of important biological markers. In course of experimental work, the following objectives were studied and solved: Proposal and realization of micro-scale preparation of selected rhenium complexes with aromatic ligands, utilizing tetrabutyammonium tetrachlorooxorhenate as a starting material; preparation and structure characterization of oxorhenium(V) complexes with 1,2-dihydroxybenzene, 1,2,3-trihydroxybenzene, and 2,3- dihydroxynaphtalene as ligands by means of ESI/MS, APPI/MS and LDI-MS; ESI/MS and UV/Vis study of kinetic behavior of complexes arising from the reaction of tetrabutylamonnium tetrachlooxorhenate with pyrogallol and catechol as ligands. Special aim was devoted to the study of subsequent chemical transformation of primarily formed Re(V) complexes; structure characterization of selected ferrocene complexes with copper, gold and silver by means of ESI/MS. Proposal of methodology of structure characterization and quantification of the...
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The role of cannabinoid system in neurobiology and therapy of psychotic disorders - an experimental study in animal models of psychosis
Nováková, Pavlína ; Páleníček, Tomáš (advisor) ; Šustková, Magdaléna (referee)
Throughout the scientific world the topic of cannabis usage and its link with psychosis seems to be discussed intensively. Considering the fact that the Czech Republic is a country with one of the highest prevalence of cannabis usage in the world it becomes a sensitive issue even in our circumstances. In the theoretical part of the work we attempted to review current knowledge of a link between cannabinoid system, canabis usage and psychosis and to point out possible future therapeutic potential of cannabinoids in the treatment of psychotic diseases. In the practical part of the work we focused on verification of propsychotic features of THC in animal model with particular attention to validation of acute subcutaneous admonistration of this drug as a novel cannabinoid model of psychosis. At the same time we tried to elucidate antipsychotic effect of CBD in this model. We tested these hypotheses in two behavioral tests (open field test, PPI ASR) and electrophysiologically (quantitative EEG). The whole analysis is enriched with pharmacokinetic data from subcutanneous and oral administration of cannabinoids. Powered by TCPDF (www.tcpdf.org)
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