Physicochemical Properties and Antioxidant Activity of Natural Melanin Extracted from the Wild Wood Ear Mushroom, Auricularia auricula (Agaricomycetes)

文献类型： 外文期刊

第一作者： Yin, Chaomin

作者： Yin, Chaomin;Yao, Fen;Wu, Wenjin;Fang, Xiuzhi;Chen, Zheya;Ma, Kun;Shi, Defang;Gaoa, Hong;Gaoa, Hong

作者机构：

关键词： Auricularia auricula; mushroom; ultra-high pressure; melanin; antioxidant activity; medicinal mushrooms

期刊名称：INTERNATIONAL JOURNAL OF MEDICINAL MUSHROOMS （ 影响因子：1.706； 五年影响因子：1.817 ）

ISSN： 1521-9437

年卷期： 2022 年 24 卷 1 期

页码：

收录情况： SCI

摘要： In this study, melanin from wild Auricularia auricula (WAA) was isolated using an ultra-high pressure (UHP)-assisted extraction method, and the physicochemical properties and antioxidant activity of WAA melanin were investigated. Under the optimized extraction conditions of a solid/liquid ratio of 1:30, a UHP of 450 MPa, a 22-min pressure holding time, a 1-mol/L NaOH concentration, and acid precipitation for 8 h, the WAA melanin extraction yield was 7.9 +/- 0.16%. Moreover, the results showed that the surface of WAA melanin lacked structural order. Most melanin showed an average diameter of 1000 mn. WAA melanin had strong absorption at a wavelength of 210 mn and displayed typical characteristic absorption peaks. Moreover, WAA melanin contained 48.51% C, 6.88% H, 5.26%N, 0.45% S, and 38.90% O and may be a 3,4-dihydroxyphenylalanine melanin. An analysis of physicochemical properties showed that WAA melanin had good stability toward heat, light, and low concentrations of reducing agents and oxidizing agents. Furthermore, WAA melanin presented certain free radical scavenging activity. This study demonstrates that wild A. auricula melanin may have potential applications in the cosmetic or food industries as a natural antioxidant.

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