title: Structural characterization and immunomodulating activity of a complex glucan from spores of Ganoderma lucidum.
abstract: A polysaccharide with a molecular weight of 1.26 x 10(5), obtained from the sporoderm-broken spores of Ganoderma lucidum, was purified by anion-exchange and gel-permeation chromatography. This polysaccharide had a strong effect on suppressing the antibody production and the Con A or LPS induced lymphocyte proliferation in mice. Chemically, the structure of the polysaccharide was identified by methylation analysis, 1 D, 2 D NMR and ESI-MS spectroscopic studies of the native one and of the oligosaccharide fragments generated by partial acid hydrolysis, Smith degradation, and acetolysis. It was concluded that the intact polysaccharide was a complex beta-D-glucan consisting of a (1-->6)-linked backbone chain, in which every other glucosyl residue was substituted at C-3 or C-4 with mono-, di- and trisaccharide branches.
authors.affiliation: Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, People's Republic of China.
authors.forename: X
authors.initials: X
authors.lastname: Bao
authors.forename: J
authors.initials: J
authors.lastname: Fang
authors.forename: X
authors.initials: X
authors.lastname: Li
mesh_terms: D000276:Adjuvants, Immunologic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D000818:Animals; D000917:Antibody Formation / Q000187:drug effects; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D005260:Female; D005936:Glucans / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D008213:Lymphocyte Activation / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008813:Mice, Inbred ICR; D008969:Molecular Sequence Data; D015394:Molecular Structure; D020940:Reishi / Q000737:chemistry*; D013172:Spores, Fungal / Q000737:chemistry
chemical_list: D000276:Adjuvants, Immunologic; D004365:Drugs, Chinese Herbal; D005936:Glucans