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Autoren: Riebel, Matthias
Sabel, Andrea
Claus, Harald
Fronk, Petra
Xia, Ning
Li, Huige
König, Helmut
Decker, Heinz
Titel: Influence of laccase and tyrosinase on the antioxidant capacity of selected phenolic compounds on human cell lines
Online-Publikationsdatum: 4-Okt-2022
Erscheinungsdatum: 2015
Sprache des Dokuments: Englisch
Zusammenfassung/Abstract: Polyphenolic compounds affect the color, odor and taste of numerous food products of plant origin. In addition to the visual and gustatory properties, they serve as radical scavengers and have antioxidant effects. Polyphenols, especially resveratrol in red wine, have gained increasing scientific and public interest due to their presumptive beneficial impact on human health. Enzymatic oxidation of phenolic compounds takes place under the influence of polyphenol oxidases (PPO), including tyrosinase and laccase. Several studies have demonstrated the radical scavenger effect of plants, food products and individual polyphenols in vitro, but, apart from resveratrol, such impact has not been proved in physiological test systems. Furthermore, only a few data exist on the antioxidant capacities of the enzymatic oxidation products of phenolic compounds generated by PPO. We report here first results about the antioxidant effects of phenolic substances, before and after oxidation by fungal model tyrosinase and laccase. In general, the common chemical 2,2-diphenyl-1-picrylhydrazyl assay and the biological tests using two different types of cell cultures (monocytes and endothelial cells) delivered similar results. The phenols tested showed significant differences with respect to their antioxidant activity in all test systems. Their antioxidant capacities after enzymatic conversion decreased or increased depending on the individual PPO used.
DDC-Sachgruppe: 530 Physik
530 Physics
Veröffentlichende Institution: Johannes Gutenberg-Universität Mainz
Organisationseinheit: FB 04 Medizin
FB 10 Biologie
Veröffentlichungsort: Mainz
Version: Published version
Publikationstyp: Zeitschriftenaufsatz
Nutzungsrechte: CC BY
Informationen zu den Nutzungsrechten:
Zeitschrift: Molecules
Seitenzahl oder Artikelnummer: 17194
Verlag: MDPI
Verlagsort: Basel
Erscheinungsdatum: 2015
ISSN: 1420-3049
URL der Originalveröffentlichung:
DOI der Originalveröffentlichung: 10.3390/molecules200917194
Enthalten in den Sammlungen:DFG-OA-Publizieren (2012 - 2017)

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