title: Cytotoxic steroids from Polyporus umbellatus.
abstract: The steroids ergone (1), (22E, 24R)-ergosta-7,22-dien-3β-ol (2), 5α,8α-epidioxy-(22E,24R) -ergosta-6,22-dien-3β-ol (3), ergosta-6,22-dien-3β,5α,6β-triol (4), and polyporusterone B (5) were isolated from Polyporus umbellatus by bioassay-guided approach. They showed potent anticancer activity against HepG2 cells. Ergone displayed remarkable anticancer activity against HepG2, Hep-2, and Hela cancer cells, of which HepG2 cells were the most sensitive. Furthermore, the cytotoxic effects of ergone on normal human cells (HUVEC) were smaller than on cancer cells. The results showed that ergone had more selective cytotoxic activity against cancer cells than against normal cells.
authors.affiliation: Biomedicine Key Laboratory of Shaanxi Province, Northwest University, Xi'an, China.
authors.forename: Ying-Yong
authors.initials: YY
authors.lastname: Zhao
authors.forename: Xu
authors.initials: X
authors.lastname: Chao
authors.forename: Yongmin
authors.initials: Y
authors.lastname: Zhang
authors.forename: Rui-Chao
authors.initials: RC
authors.lastname: Lin
authors.forename: Wen-Ji
authors.initials: WJ
authors.lastname: Sun
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D003603:Cytotoxins / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D006367:HeLa Cells; D056945:Hep G2 Cells; D006801:Humans; D055492:Polyporus / Q000737:chemistry*; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D003603:Cytotoxins; D013256:Steroids