title: The natural prenylated flavone artelastin is an inhibitor of ROS and NO production.
abstract: Artelastin, a prenylated flavone previously isolated from Artocarpus elasticus, was evaluated for its effect on the production of reactive oxygen species (ROS) by human polymorphonuclear neutrophils (PMNs) and nitric oxide (NO) by J774 murine macrophage cell line. Artelastin showed to be an inhibitor of ROS production due to a strong O2- scavenging activity. No effect was observed on the activity of myeloperoxidase (MPO). Artelastin showed also to be an inhibitor of NO production without NO scavenging activity. This flavone seems to interfere with the expression of the inducible nitric oxide synthase (iNOS) immediately after LPS-IFNgamma-macrophage stimulation.
authors.affiliation: Centro de Estudos de Química Orgânica, Fitoquímica e Farmacologia da Universidade do Porto, Faculdade de Farmácia, Porto, Portugal.
authors.forename: F
authors.initials: F
authors.lastname: Cerqueira
authors.forename: H
authors.initials: H
authors.lastname: Cidade
authors.forename: L
authors.initials: L
authors.lastname: van Ufford
authors.forename: C
authors.initials: C
authors.lastname: Beukelman
authors.forename: A
authors.initials: A
authors.lastname: Kijjoa
authors.forename: M S J
authors.initials: MS
authors.lastname: Nascimento
mesh_terms: D000818:Animals; D002460:Cell Line; D005419:Flavonoids / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D007371:Interferon-gamma / Q000378:metabolism; D008070:Lipopolysaccharides / Q000276:immunology; D008264:Macrophages / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism*; D051379:Mice; D009504:Neutrophils / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism*; D009569:Nitric Oxide / Q000378:metabolism*; D052247:Nitric Oxide Synthase Type II / Q000378:metabolism*; D009195:Peroxidase / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism*; D013481:Superoxides / Q000378:metabolism; D014969:Xanthine Oxidase / Q000378:metabolism
chemical_list: D005419:Flavonoids; D008070:Lipopolysaccharides; D017382:Reactive Oxygen Species; C477276:artelastin; D013481:Superoxides; D009569:Nitric Oxide; D007371:Interferon-gamma; D009195:Peroxidase; D052247:Nitric Oxide Synthase Type II; D014969:Xanthine Oxidase