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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/22226


    標題: Antioxidant activities of cultured Armillariella mellea
    作者: Lean-Teik Ng
    Shu-Jing Wu
    Jenn-Yi Tsai
    Min-Nan Lai
    貢獻者: 營養與保健科技研究所
    日期: 2007-07
    上傳時間: 2010-01-15 11:13:33 (UTC+8)
    摘要: This study aimed to evaluate the antioxidant activities of a cultured medicinal fungus—Armillariella mellea (Vahl. ex Fr.) Karst. (AM). Three antioxidant assay systems, namely cytochrome c, xanthine oxidase inhibition, and FeCl2-ascorbic acid stimulated lipid peroxidation in rat tissue homogenate tests, were used. Total flavonoid and phenol contents of AM extracts were also analyzed. Results showed that both aqueous (AM-H2O) and ethanolic (AM-EtOH) extracts of solid state cultured AM showed antioxidant activities in a concentration-dependent manner. At concentrations 1–100 μg/ml, the free radical scavenging activity was 73.7–92.1% for AM-H2O, and 60.0–90.8% for AM-EtOH. These extracts also showed an inhibitory effect on xanthine oxidase activity, but with a lesser potency (IC50 is 9.17 μg/ml for AM-H2O and 7.48 μg/ml for AM-EtOH). In general, AM-H2O showed a stronger antilipid peroxidation activity on different rat’s tissues than AM-EtOH. However, both AM extracts displayed a weak inhibitory effect on lipid peroxidation in plasma. Interestingly, the antilipid peroxidation activity of AM-H2O (IC50–6.66 μg/ml) in brain homogenate was as good as IC50–5.42 μg/ml. AM-H2O (80.0 mg/g) possessed a significantly higher concentration of total flavonoids than AM-EtOH (30.0 mg/g), whereas no difference was noted in the total phenol content between these two extracts. These results conclude that AM extracts possess potent free radical scavenging and antilipid peroxidation activities, especially the AM-H2O in the brain homogenate.
    關聯: Applied Biochemistry and Microbiology 43(4): p.444-448
    Appears in Collections:[保健營養系(所) ] 期刊論文

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