title: Effects of Rosa canina fruit extract on neutrophil respiratory burst.
abstract: Respiratory burst leads polymorphonuclear neutrophils (PMN) to produce reactive oxygen species (ROS) such as superoxide anions (O(2)(o-)), hypochlorous acid (HOCl) and hydrogen peroxide (H(2)O(2)) which may possess deleterious effects for the organism. Rosa canina fruits are well known to contain a large amount of vitamin C which is antioxidant. This study was focused on the polyphenolics contained in rose hips to evaluate their antioxidative properties. We prepared a rose hip extract deprived of vitamin C. The extract contained mainly phenolics such as proanthocyanidins and flavonoids. We investigated its effects directly against (O(2)(o-)), HOCl and H(2)O(2) and investigated its effects on isolated PMN. For that, in vitro inflammatory conditions were reproduced by stimulating PMN with stimuli having different transductional pathways, in order to determine a possible mechanism of action. The results showed that the extract can inhibit ROS tested in acellular and cellular systems. The IC(50) obtained were 5.73 mg/L, 1.33 mg/L and 2.34 mg/L respectively for (O(2)(o-)), HOCl and H(2)O(2) in acellular experiments. For cellular experiments, the IC(50) were quite similar. Thus, the extract did not present an effect on PMN metabolism. Therefore, the antioxidative effects of Rosa canina are due not only to vitamin C but also to polyphenolics.
authors.affiliation: Laboratoire de Pharmacologie et Pharmacie Clinique, Faculté des Sciences Pharmaceutiques et Biologiques, BP 83, 59006 Lille Cedex, France.
authors.forename: D A
authors.initials: DA
authors.lastname: Daels-Rakotoarison
authors.forename: B
authors.initials: B
authors.lastname: Gressier
authors.forename: F
authors.initials: F
authors.lastname: Trotin
authors.forename: C
authors.initials: C
authors.lastname: Brunet
authors.forename: M
authors.initials: M
authors.lastname: Luyckx
authors.forename: T
authors.initials: T
authors.lastname: Dine
authors.forename: F
authors.initials: F
authors.lastname: Bailleul
authors.forename: M
authors.initials: M
authors.lastname: Cazin
authors.forename: J-C
authors.initials: JC
authors.lastname: Cazin
mesh_terms: D000872:Anthocyanins / Q000378:metabolism; D001205:Ascorbic Acid / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005260:Female; D005419:Flavonoids / Q000378:metabolism; D005638:Fruit / Q000737:chemistry*; D006801:Humans; D006861:Hydrogen Peroxide / Q000037:antagonists & inhibitors / Q000378:metabolism; D006997:Hypochlorous Acid / Q000037:antagonists & inhibitors / Q000378:metabolism; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D008297:Male; D009504:Neutrophils / Q000187:drug effects*; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism; D010936:Plant Extracts / Q000494:pharmacology*; D011108:Polymers / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism; D044945:Proanthocyanidins; D017382:Reactive Oxygen Species / Q000037:antagonists & inhibitors / Q000378:metabolism; D016897:Respiratory Burst / Q000187:drug effects*; D027826:Rosa; D013481:Superoxides / Q000037:antagonists & inhibitors / Q000378:metabolism
chemical_list: D000872:Anthocyanins; D005419:Flavonoids; D010636:Phenols; D010936:Plant Extracts; D011108:Polymers; D044945:Proanthocyanidins; D017382:Reactive Oxygen Species; D013481:Superoxides; C013221:proanthocyanidin; D006997:Hypochlorous Acid; D006861:Hydrogen Peroxide; D007770:L-Lactate Dehydrogenase; D001205:Ascorbic Acid