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  • Title: Polysaccharides in fungi. XXVI. Two branched (1----3)-beta-D-glucans from hot water extract of Yu ĕr.
    Author: Kiho T, Sakushima M, Wang SR, Nagai K, Ukai S.
    Journal: Chem Pharm Bull (Tokyo); 1991 Mar; 39(3):798-800. PubMed ID: 2070468.
    Abstract:
    Two water-insoluble glucans, U-3-N ([alpha]D +1.0 degree, 0.5 M sodium hydroxide) and U-3-AP1 ([alpha]D +2.5 degrees, 1 M sodium hydroxide) were isolated from hot-water extract of the fruiting bodies of Yũ ĕr (Chinese name) (Auricularia sp.). U-3-N and U-3-AP1 were investigated by a combination of chemical and spectroscopic methods. The results indicated that U-3-N (molecular weight, 6.1 x 10(5)) was similar to beta-(1----6)-branched (1----3)-beta-D-glucan (N-5P: molecular weight, 5.6 x 10(5)) isolated from the alkaline extract of the fruiting bodies, and U-3-AP1 (molecular weight, 6.3 x 10(4)) was beta-(1----6)-branched (1----3)-beta-D-glucan containing beta-(1----6)-linked D-glucopyranosyl residues. U-3-N showed potent anti-tumor activity against the solid form of sarcoma 180, although U-3-AP1 had little effect on the tumor.
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