title: In vitro screening of Crataegus succulenta extracts for free radical scavenging and 15-lipoxygenase inhibitory activities.
abstract: Crataegus succulenta Schrad. ex Link is widely spread in North America. A literature survey revealed no studies on the chemical composition and biological effects of this species.
  
  
  OBJECTIVE
  The aim of the present study was to investigate the phenolic content, free radical scavenging and 15-lipoxygenase inhibitory effects of Crataegus succulenta leaf and flower extracts.
  
  
  METHODS
  Total phenolic, flavonoid and proanthocyanidin contents were quantified by spectrophotometric methods. Both extracts were evaluated for their ability to scavenge DPPH, superoxide anion and hydroxyl radicals and to inhibit 15-lipoxygenase activity.
  
  
  RESULTS
  There were noticed no striking differences in the total phenolic, flavonoid and proanthocyanidin contents between leaf and flower extracts. Both extracts showed similar 15-lipoxygenase inhibitory effects. Flower extract scavenged more effectively DPPH and superoxide radicals while leave extract was more active against hydroxyl radical. In superoxide anion radical scavenging assay, both extracts were more active than (+)-catechin. In hydroxyl radical scavenging and 15-lipoxygenase inhibition assays, the extracts were only 4-5 times less active than (+)-catechin.
  
  
  CONCLUSIONS
  The high antioxidant potential of Crataegus succulenta extracts suggest a possible use as ingredients in functional foods for the prevention of oxidative stress-related diseases.
authors: Catrinel Florentina Giurescu
authors: CF
authors: Bedreag
authors: Adriana
authors: A
authors: Trifan
authors: Al
authors: A
authors: Vasincu
authors: S D
authors: SD
authors: Miron
authors: Ana Clara
authors: AC
authors: Aprotosoaie
authors: Anca
authors: A
authors: Miron
mesh_terms: D000975:Antioxidants / Q000032:analysis; D001093:Arachidonate 15-Lipoxygenase / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology; D027825:Crataegus; D047309:Flavones / Q000032:analysis; D035264:Flowers; D016166:Free Radical Scavengers / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology; D018384:Oxidative Stress / Q000187:drug effects; D010636:Phenols / Q000032:analysis; D010936:Plant Extracts / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology; D018515:Plant Leaves; D044945:Proanthocyanidins / Q000032:analysis; D013053:Spectrophotometry
chemical_list: D000975:Antioxidants; D047309:Flavones; D016166:Free Radical Scavengers; D010636:Phenols; D010936:Plant Extracts; D044945:Proanthocyanidins; C013221:proanthocyanidin; D001093:Arachidonate 15-Lipoxygenase