title: Cytotoxic sterols from marine-derived fungus Pennicillium sp.
abstract: A new sterol, ergosta-8(14), 22-diene-3,5,6,7-tetraol(3beta, 5alpha, 6beta, 7alpha, 22E) (1), together with four known sterols ergosta-8(9), 22-diene-3,5,6,7-tetraol (3beta, 5alpha, 6beta, 7alpha, 22E) (2), 5alpha,8alpha-epidioxy-24(S)-methylcholesta-6,22-diene-3beta-ol (3), 5alpha,8alpha-epidioxy-24(S)-methylcholesta-6,9(11), 22-triene-3beta-ol (4), 3beta,5alpha,9alpha-trihydroxyergosta-7,22-diene-6-one (5) was isolated from marine fungus Pennicillium sp. Their structures were determined based on chemical analysis and spectral methods (IR, 1D and 2D NMR, HR-FAB-MS). Compounds 1-5 were evaluated for cytotoxicity against human liver cancer cell (Hep G), and most of them exhibited potent activity. Compound 1 display the highest potency with IC50 values 10.4 microg mL-1.
authors.affiliation: School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Sun
authors.forename: Li
authors.initials: L
authors.lastname: Tian
authors.forename: Jian
authors.initials: J
authors.lastname: Huang
authors.forename: Wen
authors.initials: W
authors.lastname: Li
authors.forename: Yue-Hu
authors.initials: YH
authors.lastname: Pei
mesh_terms: D045744:Cell Line, Tumor; D003603:Cytotoxins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology / Q000633:toxicity*; D005658:Fungi / Q000737:chemistry*; D006801:Humans; D020128:Inhibitory Concentration 50; D008113:Liver Neoplasms / Q000473:pathology; D008386:Marine Biology; D015394:Molecular Structure; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology / Q000633:toxicity*
chemical_list: D003603:Cytotoxins; D013261:Sterols