Myeloperoxidase inhibitory and radical scavenging activities of flavones from Pterogyne nitens

• Autor(a) principal: Fernandes, Daniara Cristina [UNESP]
• Data de Publicação: 2008
• Outros Autores: Regasini, Luis Octávio [UNESP], Vellosa, José Carlos Rebuglio [UNESP], Pauletti, Patrícia Mendonça [UNESP], Castro-Gamboa, Ian [UNESP], Bolzani, Vanderlan da Silva [UNESP], Oliveira, Olga Maria Mascarenhas [UNESP], Silva, Dulce Helena Siqueira [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1248/cpb.56.723; http://hdl.handle.net/11449/70410
• topic: Antioxidant; Flavone; Myeloperoxidase; Pterogyne nitens; Radical scavenging; flavone derivative; glucoside; myeloperoxidase; nitensoside a; nitensoside b; pedalitin; pedalitin 6 o beta glucopyranoside; sorbifolin; sorbifolin 6 o beta glucopyranoside; controlled study; drug inhibition; drug structure; IC 50; legume; nonhuman; nuclear magnetic resonance; Benzothiazoles; Enzyme Inhibitors; Fabaceae; Flavones; Free Radical Scavengers; Glucosides; Magnetic Resonance Spectroscopy; Peroxidase; Picrates; Plant Leaves; Sulfonic Acids

Two new flavone glucosides, nitensosides A and B (1, 2), together with four known compounds, sorbifolin (3), sorbifolin 6-O-β-glucopyranoside (4), pedalitin (5), and pedalitin 6-O-β-glucopyranoside (6) were isolated from Pterogyne nitens. Their structures were elucidated from 1D and 2D NMR analysis, as well as by high resolution mass spectrometry. All the isolated flavones were evaluated for their myeloperoxidase (MPO) inhibitory activity. The most active compound, pedalitin, exhibited IC 50 value of 3.75 nM on MPO. Additionally, the radical-scavenging capacity of flavones 1-6 was evaluated towards ABTS and DPPH radicals and compared to standard compounds quercetin and Trolox®. © 2008 Pharmaceutical Society of Japan.