title: An isomeric mixture of novel cerebrosides isolated from Impatiens pritzellii reduces lipopolysaccharide-induced release of IL-18 from human peripheral blood mononuclear cells.
abstract: An isomeric mixture of two cerebrosides, soya-cerebrosides I and II, was isolated from an ethno drug, the rhizomes of Impatiens pritzellii Hook. f. var. hupehensis Hook. f., and their structures were identified by spectroscopic (NMR, MS) analysis. In order to determine the immunomodulatory activities of soya-cerebrosides I and II, the effects of the mixture of cerebrosides (MC) on cytotoxicity of human peripheral blood mononuclear cells (PBMC) and the inhibitory activities to lipopolysaccharide (LPS)-induced interleukin (IL)-18 in PBMC were studied. The MC at concentrations of 10 and 1 microM, without toxicity to PBMC in 24 h, showed obvious inhibitory activity on IL-18 secretion. Because of this effect of modulating the cellular immune response, soya-cerebrosides I and II were considered to be the active substances of this ethno drug.
authors.affiliation: Key Laboratory of Marine Bio-resources Sustainable Utilization, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China. zhou-xuefeng@hotmail.com
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Zhou
authors.forename: Lan
authors.initials: L
authors.lastname: Tang
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Liu
mesh_terms: D002478:Cells, Cultured; D002554:Cerebrosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D004353:Drug Evaluation, Preclinical; D006801:Humans; D007155:Immunologic Factors / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D029069:Impatiens / Q000737:chemistry*; D020382:Interleukin-18 / Q000378:metabolism*; D007536:Isomerism; D007962:Leukocytes / Q000187:drug effects* / Q000378:metabolism; D008070:Lipopolysaccharides / Q000494:pharmacology*; D008297:Male; D008954:Models, Biological; D019906:Nuclear Magnetic Resonance, Biomolecular; D010936:Plant Extracts / Q000494:pharmacology
chemical_list: D002554:Cerebrosides; D007155:Immunologic Factors; D020382:Interleukin-18; D008070:Lipopolysaccharides; D010936:Plant Extracts