title: Four new immunosuppressive components, kobiin and kobifuranones A, B, and C, from an ascomycete, Gelasinospora kobi.
abstract: A new sesterterpenetriol named kobiin and three new 2-furanones named kobifuranones A, B, and C were isolated from an Ascomycete, Gelasinospora kobi. Kobiin, the main immunosuppressive principle of this fungus, possesses a bicyclic skeleton of five- and fifteen-membered rings. Kobifuranones A, B, and C were supposed to be metabolites formed from a common intermediate biosynthesized through the acetate-malonate pathway. The immunosuppressive activity of kobiin and kobifuranones A, B, and C was evaluated in a system of mouse spleen lymphocytes stimulated to proliferate with concanavalin A and lipopolysaccharide.
authors.affiliation: Faculty of Pharmaceutical Sciences, Chiba University, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Fujimoto
authors.forename: Y
authors.initials: Y
authors.lastname: Satoh
authors.forename: M
authors.initials: M
authors.lastname: Yamazaki
mesh_terms: D000818:Animals; D001203:Ascomycota / Q000737:chemistry*; D005663:Furans / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D007166:Immunosuppressive Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D008213:Lymphocyte Activation / Q000187:drug effects; D008214:Lymphocytes / Q000187:drug effects / Q000276:immunology; D051379:Mice; D008968:Molecular Conformation; D019906:Nuclear Magnetic Resonance, Biomolecular; D054830:Sesterterpenes; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*
chemical_list: D005663:Furans; D007166:Immunosuppressive Agents; D054830:Sesterterpenes; D013729:Terpenes