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Antioxidant and Anti-inflammatory Activity of Ethanol Extract of Malus micromalus Makino in Jeju Island  

Lee, Ju-Yeop (Jeju Bio-Industry Development Center, Jeju Hi-tech Industry Development Institute)
Kang, Min-Chul (Jeju Bio-Industry Development Center, Jeju Hi-tech Industry Development Institute)
Lee, Jung-A (Jeju Bio-Industry Development Center, Jeju Hi-tech Industry Development Institute)
Ko, Kwang-Hyo (Jeju Bio-Industry Development Center, Jeju Hi-tech Industry Development Institute)
Kim, Bong-Seok (Jeju Bio-Industry Development Center, Jeju Hi-tech Industry Development Institute)
Han, Jong-Heon (Jeju Bio-Industry Development Center, Jeju Hi-tech Industry Development Institute)
Kim, Se-Jae (Department of Life Science, College of Natural Sciences, Cheju National University)
Kim, Gi-Ok (Jeju Bio-Industry Development Center, Jeju Hi-tech Industry Development Institute)
Publication Information
KSBB Journal / v.24, no.4, 2009 , pp. 327-333 More about this Journal
Abstract
The antioxidant and anti-inflammatory activities of ethanol extract of Malus micromalus were studied in vitro. Ethanol extract of M. micromalus showed scavenging effects on 1,1-diphenyl-2-picrylhydrazyl (DPPH) and nitric oxide (NO) radicals. In addition, ethanol extract of M. micromalus inhibited the generation of superoxide anion ($O_2^-$) radical and uric acid by xanthine oxidase. We also investigated the effect of ethanol extract of M. micromalus on NO production in a lipopolysaccharide (LPS)-stimulated murine macrophage RAW 264.7 cells. Ethanol extract of M. micromalus significantly inhibited NO production and this inhibitory action was not due to the cytotoxicity. The expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) was markedly down-regulated by ethanol extract of M. micromalus. These results indicate that the inhibitory action of ethanol extract of M. micromalus on NO production in LPS-stimulated macropages might be due in part to abrogation of iNOS and COX-2 protein induction. Taken together, this study suggests that ethanol extract of M. micromalus could contribute to the chemoprevention and therapy of oxidative stress and inflammation.
Keywords
Malus micromalus; antioxidant; anti-inflammatory; nitric oxide synthase; cyclooxygenase-2;
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