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Effects of lichen heteroglycans on proliferation and IL-10 secretion by rat spleen cells and IL-10 and TNF-alpha secretion by rat peritoneal macrophages in vitro

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Authors
Omarsdottir, S
Freysdottir, J
Barsett, H
Paulsen, B Smestad
Olafsdottir, E S
Issue Date
2005-06-01

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Citation
Phytomedicine. 2005, 12(6-7):461-7
Abstract
Four polysaccharides Pc-1, Pc-2, Pc-3 and Pc-4 were isolated from water and alkali extracts of the lichen Peltigera canina using ethanol fractionation, gel filtration and preparative HP-GPC. The monosaccharide composition was determined by methanolysis and GC and showed mannose and galactose as the predominating structural units. The mean M(r) was determined by HP-GPC. The heteroglycans were tested for in vitro immunomodulating activities and showed mitogenic activity in rat spleen cell proliferation assay and stimulated IL-10 secretion. In rat peritoneal macrophages, the heteroglycans stimulated TNF-alpha secretion, but not IL-10 secretion. These results indicate that the polysaccharides influence cells of the immune system both from the innate and the adaptive systems.
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http://www.sciencedirect.com/science/article/B7GVW-4G3CWSR-5/2/273a0225747294aa1dda7671df2b3d60
ae974a485f413a2113503eed53cd6c53
10.1016/j.phymed.2004.03.012
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