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Preparation of Black Hoof Medicinal Mushroom Phellinus linteus (Berk. et M.A. Curt.) Teng (Aphyllophoromycetideae) (β-Glucan Sulfate and In Vitro Tumor Cell Growth Inhibitory Activity
ABSTRACT
Polysaccharide β-glucans were extracted from the medicinal mushroom Phellinus linteus (Hymenochaetaceae, Aphyllophoromycetideae) and subjected to sulfation. Chemical modification of the β-glucan was confirmed by structural analysis, and its biological properties were compared with those of native β-glucan. The results of Fourier transform infrared spectroscopy and elemental analysis indicated that successive preparation of the sulfated derivative yielded a degree of substitution of 0.47. Nitric oxide production measured by the bronchoalveolar lavage (BAL) experiments increased 1.5-fold after sulfation. In addition, the introduction of sulfate groups into the β-glucan chains improved in vitro growth inhibitory activity against SNU-C2A cells. Therefore, sulfated β-glucan extracted from Ph. Linteus may be beneficial for immune support due to its incorporation of functional groups into its polymer structure.