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Antioxidant activities of cultured Armillariella mellea

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Abstract

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.

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Authors and Affiliations

  1. Department of Biotechnology, Tajen University, Yanpu Shiang, Pingtung, Taiwan, China

    L. T. Ng

  2. Department of Nutritional Health, Chia-Nan University of Pharmacy and Technology, Tainan, Taiwan, China

    S. J. Wu

  3. Graduate Institute of Biotechnology, Chia-Nan University of Pharmacy and Technology, Tainan, Taiwan, China

    J. Y. Tsai

  4. Kang Jian Biotech Co., Ltd., Nantou Hsien, Taiwan, China

    M. N. Lai

Authors
  1. L. T. Ng
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  2. S. J. Wu
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  3. J. Y. Tsai
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  4. M. N. Lai
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Published in Russian in Prikladnaya Biokhimiya i Mikrobiologiya, 2007, Vol. 43, No. 4, pp. 495–500.

The text was submitted by the authors in English.

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Ng, L.T., Wu, S.J., Tsai, J.Y. et al. Antioxidant activities of cultured Armillariella mellea . Appl Biochem Microbiol 43, 444–448 (2007). https://doi.org/10.1134/S0003683807040151

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  • DOI: https://doi.org/10.1134/S0003683807040151

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