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KMID : 0381020110440060488
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Korean Journal of Nutrition
2011 Volume.44 No. 6 p.488 ~ p.497
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Comparison of the Antioxidant Effects of Diallyl Sulfide, Capsaicin, Gingerol and Sulforaphane in -Stressed HepG2 Cells
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Lee So-Youn
Wi Hae-Ri
Lee Myoung-Sook
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Abstract
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Oxygen is necessary to sustain life, yet cellular oxygen metabolism creates destructive elements called free radicals. Free radicals are chemically unbalanced and carrying free electrons that can damage molecules, potentially damaging the cell itself. For this reason, many antioxidant products, including supplements and functional foods, are being developed. In particular, natural products are rich sources of pharmacologically active compounds. The purpose of this study was to investigate the antioxidant effects of target biomaterials in Korean traditional spices such as diallyl sulfide (DAS), capsaicin (CAP), and gingerol (GGR), and to investigate the response of the antioxidant defense system to oxidative stress by hydrogen peroxide () compared to sulforaphane (SFN) in HepG2 cells. After the analysis of the cell viability using Cell Counting kit-8 (CCK-8) assay, we determined that the optimum levels were DAS, CAP, GGR, and SFN. Antioxidant enzymes were measured and protein expression was detected by Western blotting. All treatments showed a significant decrease in antioxidant enzyme activity such as superoxide dismutase, catalse, and glutathione peroxidase in HepG2 cells. Additionally, DAS, CAP, GGR and SFN increased the antioxidant system-related transcription factor Nrf2 which was found to be regulated by the activation of MAPK-JNK in this study. In conclusion, these results indicate the protective effects of DAS CAP, GGR, and SFN against -induced oxidative stress.
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KEYWORD
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antioxidant, HepG2 cells, diallyl sulfide, capsaicin, gingerol, sulforaphane
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