Original title: Mutagenní a antimutagenní účinky látek zevního prostředí
Translated title: Mutagenic and Antimutagenic Effect of Environmental Substances
Authors: Langová, Martina ; Vodička, Pavel (advisor) ; Sedmíková, Markéta (referee) ; Novotná, Božena (referee)
Document type: Doctoral theses
Year: 2008
Language: cze
Abstract: [cze] [eng]
Cílem práce je testování antimutagenních účinků chemicky definovaných přírodních látek: diallylsulfid (DAS), kyselina ellagová (EA), resveratrol (RES) a fenetyl isothiokyanát (PEITC) na experimentálních modelech, které byly ovlivněny vybranými mutageny: aflatoxin B1 (AFB1), 2-amino-3-methylimidazo/4,5,-f/chinolin (IQ) a N-nitroso-N metylurea (MNU). AFB1 a IQ jsou nepřímé mutageny a vyžadují metabolickou aktivaci k tomu, aby se projevil jejich genotoxický efekt. Oproti tomu třetí použitý karcinogen MNU metabolickou aktivaci nevyžaduje. Testováni protektivních látek přírodního původu bylo provedeno na prokaryotním modelu (Amesův test, kmeny Salmonella typhimurium TA98, TA100) a eukaryotním modelu (mikronukleus test a kometový test na myším modelu). In the present study were used reference mutagens which effects mutagenic activity in prokaryotic and eukaryotic testing systems. Aflatoxin B1 (AFB1) is one of the most thoroughly studied and the well known mycotoxin with carcinogenic activity. 2-Amino-3-methylimidazol[4,5-f] quinoline (IQ) in isolated form has been used as another reference mutagen. These compounds are indirect acting genotoxins, i.e. need metabolic activation to exert genotoxic effect. As a third reference mutagen in the present study there has been chosen N-nitroso-N-methylurea (MNU) which is direct acting carcinogenic N-nitroso compound. The aim of the study was to investigate antimutagenic effects of ellagic acide (EA), resveratrol (RES), diallyl sulfide (DAS) and phenetyl isothiocyanate (PEITC) on the mutagenicity of the mutagens. The Ames test with Salmonella typhimurium TA98 and TA100 strains was used for the evaluation of antimutagenic effect of EA, RES, DAS and PEITC in vitro.

Institution: Charles University Faculties (theses) (web)
Document availability information: Available in the Charles University Digital Repository.
Original record: http://hdl.handle.net/20.500.11956/17669

Permalink: http://www.nusl.cz/ntk/nusl-294399


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Universities and colleges > Public universities > Charles University > Charles University Faculties (theses)
Academic theses (ETDs) > Doctoral theses