Cytisus multiflorus: source of antioxidant polyphenols

• Autor(es): Pereira, Olívia R. ; Perez, María J. ; Macias, Rócio I.R. ; Domingues, M.R.M. ; Silva, Artur M.S. ; Marín, Jose J.G. ; Cardoso, Susana M.
• Data: 2012
• Identificador Persistente: http://hdl.handle.net/10198/8268
• Origem: Biblioteca Digital do IPB
• Assunto(s): Cytisus multiflorus; Phenolic compounds; Antioxidant activity
• Tipo de Documento: Documento de conferência
• Idioma: Inglês

Descrição

The present study investigates the phenolic composition and the antioxidant capacity of an ethanolic extract from flowers of C. multiflorus. As determined by HPLC-DAD, ESI-MSn and NMR combined analysis, this extract was mainly composed of chrysin-7-O-β-D-glycopyranoside, and also contained considerable amounts of rutin, a dihydroxyflavone isomer of chrysin and glycosidic derivatives of luteolin and apigenin. The C. multiflorus ethanolic extract exhibited high DPPH scavenging activity and reducing power with EC50 of 13.4 ± 0.6 and 95.7 ± 4.6 µg/mL, respectively. The exposure of human hepatoblastoma HepG2 cells to the non-toxic concentrations of the extract (50 or 200 µg/mL) resulted in a decreased rate of ROS production in a concentration dependent manner. Moreover, the mixture of standards that simulated the phenolic composition of the plant afforded a protection of about 50% in intracellular ROS production. Hence, the gathered results suggest that C. multiflorus polyphenols are closely associated to its antioxidant properties.