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        Phenolic Extract of Dialium guineense Pulp Enhances Reactive Oxygen Species Detoxification in Aflatoxin B1 Hepatocarcinogenesis

        Abdulwasiu O. Adeleye,Taofeek O. Ajiboye,Ganiyat A. Iliasu,Folakemi A. Abdussalam,Abdulazeez Balogun,Oluwayemisi B. Ojewuyi,Musa T. Yakubu 한국식품영양과학회 2014 Journal of medicinal food Vol.17 No.8

        This study investigated the effect of Dialium guineense pulp phenolic extract on aflatoxin B1 (AFB1)–induced oxidative imbalance in rat liver. Reactive oxygen species (ROS) scavenging potentials of free and bound phenolic extract of D. guineense (0.2–1.0 mg/mL) were investigated in vitro using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical, superoxide ion (O2-), hydrogen peroxide (H2O2), hydroxyl radical, and ferric ion reducing system. In the in vivo study, 35 animals were randomized into seven groups of five rats each. Free and bound phenolic extract (1 mg/mL) produced 66.42% and 93.08%, 57.1% and 86.0%, 62.0% and 90.05%, and 60.11% and 72.37% scavenging effect on DPPH radical, O2 - radical, H2O2, and hydroxyl radical, while ferric ion was significantly reduced. An AFB1-mediated decrease in the activities of ROS detoxifying enzymes (superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, and glucose 6 phosphate dehydrogenase) was significantly attenuated (P < .05). AFB1-mediated elevation in the concentrations of oxidative stress biomarkers; malondialdehyde, conjugated dienes, lipid hydroperoxides, protein carbonyl, and percentage DNA fragmentation were significantly lowered by D. guineense phenolic extract (P < .05). Overall, the in vitro and in vivo effects suggest that D. guineense phenolic extract elicited ROS scavenging and detoxification potentials, as well as the capability of preventing lipid peroxidation, protein oxidation, and DNA fragmentation.

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