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Biodegradation of 17alfa-ethinylestradiol by enzymes of ligninolytic fungi
Přenosilová, Lenka ; Stiborová, Marie (advisor) ; Černá, Věra (referee)
This work is aimed at the study of the effect of 17α-ethinylestradiol (EE2) on the production and characteristics of ligninolytic enzymes (laccase, Mn-dependent peroxidase and lignin peroxidase) in I. lacteus, T. versicolor, P. chrysosporium and P. ostreatus cultures grown on two types of liquid media. Enzyme activity production in fungal cultures was affected by the composition of culture medium. In the case of P. chrysosporium, the addition of EE2 to the complex- medium cultures led to a MnP activity stimulation and simultaneously LiP production was partially repressed in these cultures. In the mineral MM medium, no effect of EE2 on enzyme production by P. chrysosporium was observed. In EE2 treated MM cultures of P. ostreatus lower MnP activities were found when compared to biotic controls. In the case of T. versicolor cultures, the addition of EE2 to the complex medium caused laccase and LiP stimulation in the cultures. In the MM medium, however, only laccase production was affected by EE2. I. lacteus MnP production was partially repressed by EE2 in MM medium. In contrast to that, significantly higher MnP activities were detected in complex- medium I. lacteus cultures after the treatment with EE2. Further EE2 degradation by the fungal cultures was studied. The highest degradation effeciency was...
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Biochemical properties of quaternary benzo(c)phenanthrene alkaloids
Přenosilová, Lenka ; Naiman, Karel (referee) ; Stiborová, Marie (advisor)
Quaternary benzo(c)phenanthridine alkaloids are plant products found in many plants. The richest sources are mainly Chelidonieae plants and the family Papaveraceae. The basis of the structure of quaternary benzo(c)phenanthridine alkaloids (sanguinarine, chelerythrine, sanguiluthine, sanguirubine, chelirubine, cheliluthine, macarpine) is N- methylbenzo(c)phenanthridine cation. Chemical structure of quaternary benzo(c)phenanthridine alkaloids related to their cytotoxic properties, the ability to intercalation into DNA and the fluorescence capabilities. Quaternary benzo(c)phenanthridine alkaloids occur in two forms, one of which operates reversible equilibrium depending on pH. Very important are the biological effects of quaternary benzo(c)phenanthridine alkaloids. These alkaloids could be used as fluorescent DNA probes and as supravital dye of nucleic acids. Individual quaternary benzo(c)phenanthridine alkaloids have many uses. Sanguinarine is used for its antiplaque and anti-inflammatory effects of oral hygiene. For its effect against the coagulation of blood platelets may play an important role in preventing cardiovascular diseases. Sanguinarine may be used as a potential cytostatic drug for the treatment of cancer. Chelerythrine is similar to use in oral hygiene products and is known for its...
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