School of Chinese Medicine
A polysaccharide named GSP-2 with a molecular size of 32 kDa was isolated from the fruiting bodies of Ganoderma sinense. Its structure was well elucidated, by a combined utilization of chemical and spectroscopic techniques, to be a β-glucan with a backbone of (1→4)– and (1→6)–Glcp, bearing terminal- and (1→3)–Glcp side-chains at O-3 position of (1→6)–Glcp. Immunological assay exhibited that GSP-2 significantly induced the proliferation of BALB/c mice splenocytes with target on only B cells, and enhanced the production of several cytokines in human peripheral blood mononuclear cells and derived dendritic cells. Besides, the fluorescent labeled GSP-2 was phagocytosed by the RAW 264.7 cells and induced the nitric oxide secretion from the cells.
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Public Library of Science
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Han, Xiao-Qiang, Gar-Lee Yue, Cai-Xia Dong, Chung-Lap Chan, Chun-Hay Ko, Wing-Shing Cheung, Ke-Wang Luo, Hui Dai, Chun-Kwok Wong, Ping-Chung Leung, and Quan-Bin Han. "Structure elucidation and immunomodulatory activity of a beta glucan from the fruiting bodies of Ganoderma sinense." PLoS ONE 9.7 (2014): e100380.