title: Three new sesquiterpene glycosides from Dendrobium nobile with immunomodulatory activity.
abstract: Dendroside A (1) and dendronobilosides A and B (2 and 3), three new sesquiterpene glycosides, have been isolated from the stems of Dendrobium nobile, a plant used in Chinese traditional medicine. Their structures and stereochemistry were determined as 10beta,12,14-trihydroxyalloaromadendrane 14-O-beta-D-glucopyranoside (1), 10,12-dihydroxypicrotoxane 10,12-di-O-beta-D-glucopyranoside (2), and 6alpha,10,12-trihydroxypicrotoxane 10-O-beta-D-glucopyranoside (3), respectively, on the basis of spectroscopic and chemical methods. Quantum chemistry calculations were used in support of the structural determination of 1. Compounds 1 and 2 were found to stimulate the proliferation of murine T and B lymphocytes in vitro, while compound 3 showed inhibitory activity in this same assay.
authors.affiliation: Shanghai Institute of Materia Medica, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, People's Republic of China.
authors.forename: W
authors.initials: W
authors.lastname: Zhao
authors.forename: Q
authors.initials: Q
authors.lastname: Ye
authors.forename: X
authors.initials: X
authors.lastname: Tan
authors.forename: H
authors.initials: H
authors.lastname: Jiang
authors.forename: X
authors.initials: X
authors.lastname: Li
authors.forename: K
authors.initials: K
authors.lastname: Chen
authors.forename: A D
authors.initials: AD
authors.lastname: Kinghorn
mesh_terms: D000276:Adjuvants, Immunologic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000818:Animals; D001402:B-Lymphocytes / Q000187:drug effects / Q000276:immunology / Q000378:metabolism; D002855:Chromatography, Thin Layer; D003208:Concanavalin A / Q000494:pharmacology; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D066298:In Vitro Techniques; D008070:Lipopolysaccharides / Q000494:pharmacology; D008222:Lymphokines / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D008516:Medicine, Chinese Traditional; D051379:Mice; D015394:Molecular Structure; D037121:Plant Lectins; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013055:Spectrophotometry, Infrared; D013154:Spleen / Q000166:cytology / Q000187:drug effects / Q000276:immunology / Q000378:metabolism; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology / Q000378:metabolism
chemical_list: D000276:Adjuvants, Immunologic; D004365:Drugs, Chinese Herbal; D005960:Glucosides; D006027:Glycosides; D008070:Lipopolysaccharides; D008222:Lymphokines; D037121:Plant Lectins; D012717:Sesquiterpenes; C438414:dendronobiloside A; C438415:dendronobiloside B; C438413:dendroside A; C043695:lymphocyte proliferation potentiating factors; D003208:Concanavalin A