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Preparation of conjugates oligonucleotide probes with functional molecules.
Grossová, Petra ; Miletín, Miroslav (advisor) ; Demuth, Jiří (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Chemistry and Pharmaceutical Analysis Supervisor: doc. PharmDr. Miroslav Miletín, Ph.D. Consultant: Mgr. Michaela Beranová Student: Petra Grossová Title of Thesis: Preparation of conjugates oligonucleotide probes with functional molecules The aim of this thesis was to find the optimal conditions for conjugation of an oligonucleotide to a fluorescent dye by solid-phase click chemistry. The traditional fluorescent dye Cyanine5 was chosen as the labelling molecule. The effect of the concentration of fluorescent dye, the position of the labelling, the type of solid phase and the reaction time were examined. The deprotection conditions were optimized. Two series of reactions followed by deprotection and purification were performed. The efficiency of the reaction was evaluated by comparing the peak areas under the curve of conjugated and unconjugated molecules in the chromatograms of the samples after analysis by HCPL with UV detection. Peak integration was performed in LabSolutions software. The reactions running on the polystyrene solid phase gave the highest yields, with labelling at any position of the chain. For labelling at the 5'-end of the chain, more than 90% efficiency was achieved using all tested solid...
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Cyclodextrin-drug conjugates equipped with targeting groups as anticancer agents
Lamačová, Lucie Josefa ; Jindřich, Jindřich (advisor) ; Smrček, Stanislav (referee)
This diploma thesis deals with the synthesis of conjugates of cyclodextrin with the anticancer drug 5-fluorouracil and folic acid, which works as a targeting group. 5-Fluorouracil is connected to cyclodextrin via an acid-labile linker, which is expected to be cleaved in decreased pH in the proximity of malignant tissue or in the endosome. Malignant tissue also overexpresses receptor for folic acid, and this phenomenon is used for targeted delivery of therapeutic agents. Cyclodextrins are cyclic oligosaccharides, which are known for their ability to complex various compounds into their hydrophobic cavity and increase solubility, stability and bioavailability of these compounds. A synthetic approach for the preparation of conjugate of cyclodextrin with 5-fluorouracil and folic acid was designed and the conjugate was subsequently synthesized. Key words: cyclodextrin, fluorouracil, targeting group, folic acid, drug delivery
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Preparation of modified ligands of mu-opioid receptors
Hadzima, Martin ; Machara, Aleš (advisor) ; Veselý, Jan (referee)
This diploma thesis deals with preparation of modified ligands of mu, delta and kappa opioid receptors, following up on the author's bachelor's thesis.1 The main goal of the submitted thesis is ligand tethering at an appropriate position using oligoethylene glycol linkers, to enable their use in the innovative iBodies concept.2 Ligands chosen for modifications were: naltrexone (μ-opioid receptor), naltrindole (δ-opioid receptor) and nalfurafine (κ-opioid receptor). Naltrexone was modified, according to the bachelor's thesis results, at the C-6 position with linker attachment via ether and amide. At the same time, the influence of the configuration at the newly formed C-6 stereogenic center on biological activity was studied. In case of naltrindole, access through indole nitrogen was chosen based on the information in literature.3-5 Nalfurafine was modified on the furane fragment. Series of fluorescently labeled ligands were prepared. Attachment of the fluorescent tag allowed us to study the affinity and selectivity of these modified ligands. Based on the results, ligands for development of DIANA method and for preparation of synthetic iBodies were synthesised.6 Key words: naltrexone, receptor, conjugate, opioid receptor 1 M. Hadzima. Fluorescenčně značené ligandy μ-opioidních receptorů, 2016. 2 P....
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