title: Aurilides B and C, cancer cell toxins from a Papua New Guinea collection of the marine cyanobacterium Lyngbya majuscula.
abstract: Cytotoxicity-guided fractionation of a strain of the marine cyanobacterium Lyngbya majuscula collected from Papua New Guinea led to the isolation of aurilides B (1) and C (2). The planar structures of 1 and 2 were established by spectroscopic analysis, including HR-FABMS, 1D (1)H and (13)C NMR, and 2D COSY, HSQC, HSQC-TOCSY, and HMBC spectra. The absolute configuration was determined by spectroscopic analysis and chiral HPLC analysis of acid hydrolysates of 1 and 2. Both aurilides B and C showed in vitro cytotoxicity toward NCI-H460 human lung tumor and the neuro-2a mouse neuroblastoma cell lines, with LC(50) values between 0.01 and 0.13 microM. Aurilide B (1) was evaluated in the NCI 60 cell line panel and found to exhibit a high level of cytotoxicity (the mean panel GI(50) concentration was less than 10 nM) and to be particularly active against leukemia, renal, and prostate cancer cell lines.
authors.affiliation: College of Pharmacy, Oregon State University, Corvallis, OR 97331, USA.
authors.forename: Bingnan
authors.initials: B
authors.lastname: Han
authors.forename: Harald
authors.initials: H
authors.lastname: Gross
authors.forename: Douglas E
authors.initials: DE
authors.lastname: Goeger
authors.forename: Susan L
authors.initials: SL
authors.lastname: Mooberry
authors.forename: William H
authors.initials: WH
authors.lastname: Gerwick
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D008235:Lyngbya Toxins / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D008387:Marine Toxins / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D015394:Molecular Structure; D010219:Papua New Guinea; D010456:Peptides, Cyclic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D008235:Lyngbya Toxins; D008387:Marine Toxins; D010456:Peptides, Cyclic; C510530:aurilide A; C510531:aurilide B; C510532:aurilide C