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International Journal of Medicinal Mushrooms
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ISSN Imprimer: 1521-9437
ISSN En ligne: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.v18.i12.20
pages 1071-1081

Purification, Characterization, Antioxidation, and Antiaging Properties of Exopolysaccharides and Endopolysaccharides of the Royal Sun Medicinal Mushroom, Agaricus brasiliensis (Agaricomycetes)

Jianjun Zhang
College of Life Science, Shandong Agricultural University, Taian, Shandong, China
Zheng Gao
College of Life Science, Shandong Agricultural University, Taian, Shandong, P. R. China
Shangshang Li
College of Life Science, Shandong Agricultural University, Taian, Shandong, P. R. China
Shanglong Gao
College of Life Science, Shandong Agricultural University, Taian, Shandong, P. R. China
Zhenzhen Ren
College of Life Science, Shandong Agricultural University, Taian, Shandong, P. R. China
Huijuan Jing
College of Life Science, Shandong Agricultural University, Taian, Shandong, P. R. China
Le Jia
College of Life Science, Shandong Agricultural University, Taian, Shandong, China

RÉSUMÉ

Exopolysaccharides (ExPSs) and endopolysaccharides (EnPSs) were isolated from mycelia and culture medium of Agaricus brasiliensis. Four polysaccharide fractions (ExPS-1-2, ExPS-2, EnPS-1, and EnPS-2) were puri¬fied from ExPSs and EnPSs using diethylaminoethyl anion exchange and a Sephadex G-100 gel filtration column, respectively, and their physicochemical properties were analyzed and evaluated to determine antioxidant activity. The results showed that rhamnose and mannose were the main monosaccharides of the polysaccharide fractions. ExPS-2 and EnPS-2 were acidic polysaccharide fractions and showed higher scavenging effects on 1,1-diphenyl-2-picryl- hydrazyl and hydroxyl radicals, and had higher reducing power in the in vitro antioxidant assays. In addition, the malondialdehyde contents, the total antioxidant capacity, and the alanine transaminase activity were also assessed to determine the antiaging effects; ExPSs showed more antiaging effects compared with EnPSs. The results suggest that polysaccharides extracted from A. brasiliensis have significant potential as natural antioxidants and antiaging agents.


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