title: Antioxidant capacity of BO-653, 2,3-dihydro-5-hydroxy-4,6-di-tert-butyl-2,2-dipentylbenzofuran, and uric acid as evaluated by ORAC method and inhibition of lipid peroxidation.
abstract: The role of radical-scavenging antioxidant against oxidative stress has received much attention. The antioxidant capacity has been assessed by various methods. Above all, oxygen radical absorbance capacity (ORAC) has been frequently employed [Prior et.al., J. Agric. Food Chem.2005, 53, 4290]. In the present study, the antioxidant capacity of 2,3-dihydro-5-hydroxy-4,6-di-tert-butyl-2,2-dipentylbenzofuran (BO-653) and uric acid was assessed by ORAC method using pyranine as a reference probe and compared with that against lipid peroxidation of human plasma. It was found that BO-653 was assessed to be much less potent than uric acid by ORAC method, whereas BO-653 exerted much higher antioxidant activity than uric acid against plasma lipid peroxidation. The reason for such discrepancy is discussed. The results suggest that ORAC method is suitable for the assessment of free radical scavenging capacity, but not for the assessment of antioxidant capacity against lipid peroxidation in plasma.
authors.affiliation: Human Stress Signal Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan. etsuo-niki@aist.go.jp
authors.forename: Etsuo
authors.initials: E
authors.lastname: Niki
authors.forename: Akiko
authors.initials: A
authors.lastname: Fukuhara
authors.forename: Yo
authors.initials: Y
authors.lastname: Omata
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Saito
authors.forename: Yasukazu
authors.initials: Y
authors.lastname: Yoshida
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D001190:Arylsulfonates / Q000737:chemistry; D001572:Benzofurans / Q000494:pharmacology*; D006801:Humans; D015227:Lipid Peroxidation / Q000187:drug effects* / Q000502:physiology; D010084:Oxidation-Reduction; D018384:Oxidative Stress / Q000187:drug effects* / Q000502:physiology; D010949:Plasma / Q000187:drug effects* / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000097:blood*; D013997:Time Factors; D014527:Uric Acid / Q000494:pharmacology*
chemical_list: C106512:2,3-dihydro-5-hydroxy-2,2-dipentyl-4,6-di-tert-butylbenzofuran; D000975:Antioxidants; D001190:Arylsulfonates; D001572:Benzofurans; D017382:Reactive Oxygen Species; D014527:Uric Acid; C005047:pyranine