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KMID : 1160220080360010050
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Mycobiology
2008 Volume.36 No. 1 p.50 ~ p.54
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Analysis of the Chemical Constituents of Agaricus brasiliensis
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Cho Soo-Muk
Jang Kab-Yeul
Park Hong-Ju
Park Jeong-Sik
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Abstract
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This study examined the chemical composition of A. blasiliensis and the chemical structural properties of an immuno-stimulating polysaccharide. The amino acids, free sugars, and organic acids by HPLC and fatty acids by GC were analyzed. The immuno-stimulating substance from A. blasiliensis was extracted with hot water and purified by ethanol precipitation. It underwent ion exchange chromatography on DEAE-cellulose and gel filtration on Toyopearl HW 65F. Through GP-HPLC, the substance was found to be homogeneous. Its chemical structure was determined by 13C-NMR. Fatty acids, organic acids, and sugar alcohol composition consisted exclusively of linoleic acid, fumaric acid and mannitol, respectively. The amino acids were mainly glutamic acid, glycine, and arginine. By 13C-NMR analysis, the immuno-stimulating substance was identified as β-(1 → 3) (1 → 6)-glucan, composed of a backbone with (1 → 3)-linked D-glucopyranosyl residues branching a (1 → 6)-linked D-glucopyranosyl residue. The β-glucan from A. blasiliensis showed pronounced immuno-stimulating activity on the antibody-production ability of B-lymphocytes by the hemolytic suspension assay. In these results, A. blasiliensis was estimated to have potent pharmacological properties and potential nutritional values.
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KEYWORD
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Agaricus blasiliensis, Chemical composition, Immuno-stimulating substance
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