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Possibility of determination of selected flavonoides
Smělá, Margita ; Vitoulová, Eva (referee) ; Vespalcová, Milena (advisor)
The theoretic part of the bachelor‘s thesis deals with description of selected flavonoids as apigenin, quercetin, luteolin, keampferol, rutin, myricetin and with options of their determinations. There were described typical properities and effects of several flavonoids at first. In the next part there are principles of methods, especially high-performance liquid chromatography and capillary electrophoresis. The biggest attention was made to literary survey of determination flavonoids coumpounds mentioned above, by high-performance liquid chromatography and capillary electroproresis. There were described the collection of plant material for extraction of flavonids in the practical part. The white and blue grapes were frozen by dry ice as soon as they were separated from a busch. Grapes were made in a nitrogenous atmosphere and lyophilizated after the frozen.
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Effect of natural substances from tea on G-quadruplexes and binding and transactivation properties of p53 protein
Foltanová, Klára ; Řeháková, Veronika (referee) ; Brázda, Václav (advisor)
The tumor suppressor protein p53 belongs to the most important regulator of the cell cycle in case of DNA damage. Apart from stopping the cell cycle and inducing apoptosis, protein p53 interacts with other proteins and DNA. Mutation of the TP53 gene encoding the protein p53 are a common feature of human cancer. This Bachelor thesis investigates natural substances from tea which could play a positive role in the activation of protein p53 in cancer and be used to support the treatment of these diseases. In the theoretical part of the Bachelor thesis, the secondary structures of DNA were described, specifically the structure and properties of G-quadruplexes, as well as protein p53 and its binding activity to the secondary structure of DNA. Selected natural substances found in tea and food were described – gallic acid and apigenin. The aim of the experimental part of this work was to verify the ability of these substances to interact with G-quadruplexes in vitro and thus to stabilize them in the yeast model and to assess the subsequent effect on measuring the effect of protein p53 transactivation. The interaction of quaternary structures with G4 ligands was verified in vitro by using the ThT fluorescence assay and the luciferase reporter assay. It was found that G4 ligands at 30 M concentration after 20 hours of incubation did not show a significant effect on the tested yeast cultures. At a 60 M concentration of G4 ligands, an increase in protein p53 production was observed due to cellular stress caused by the presence of G4 ligands.
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Possibility of determination of selected flavonoides
Smělá, Margita ; Vitoulová, Eva (referee) ; Vespalcová, Milena (advisor)
The theoretic part of the bachelor‘s thesis deals with description of selected flavonoids as apigenin, quercetin, luteolin, keampferol, rutin, myricetin and with options of their determinations. There were described typical properities and effects of several flavonoids at first. In the next part there are principles of methods, especially high-performance liquid chromatography and capillary electrophoresis. The biggest attention was made to literary survey of determination flavonoids coumpounds mentioned above, by high-performance liquid chromatography and capillary electroproresis. There were described the collection of plant material for extraction of flavonids in the practical part. The white and blue grapes were frozen by dry ice as soon as they were separated from a busch. Grapes were made in a nitrogenous atmosphere and lyophilizated after the frozen.
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Content of selected phenolic compounds in spice plants.
BERANOVÁ, Zuzana
This work concerns the amount of certain phenols in some of the representatives of families Alliaceae, Lamiaceae and Apiaceae. Phenols in plants are widely represented and highly concentrated. Flavonoids are one of the smallest, yet quite significant classes of phenols. Ingestion of food containing flavonoids can prevent certain diseases such as Arteriosclerosis. cardiovascular and tumor diseases. This work focuses, for their special biological effects, on five flavonoids: Kaempferol, Quercetin, Myricetin, Apigenin and Luteolin. For determining the content of phenols a method of High-performance liquid chromatography (HPLC) was used. Three representative of the family Alliaceae, two representatives of the family Lamiaceae and three representatives of the family Apiaceae were analysed. Only edible parts of the plants were used for the analysis and the amount of phenols was compared in certain plants planted in beddings to the plants planted in greenhouses. At first, the qualitative representantion of phenols was ascertained by the HPLC method. The result is chromatographic profiles, which were then used in calculating the amount of particular phenols. Then the total amounts of kaempferol, quercetin, myricetin, apigenin and luteolin were found out thanks to HPLC method. The biggest amount of total kaempferol was determined in petroselium hortense planted in beddings (588 mg/kg of fresh sample) and in a greenhouse (340 mg/kg of fresh sample). The biggest amount of quercetin was determined in red onion planted in a greenhouse (773 mg/kg of fresh sample) and in ocimum basilicum planted in beddings (535 mg/kg of fresh sample). The biggest amount of apigenin was determined in petroselium hortense planted in a greenhouse (1790 mg/kg of fresh sample) and in petroselium chrispum planted in beddings (3690 mg/kg of fresh sample).
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