title: A new hTopo I isomerase inhibitor produced by a mangrove endophytic fungus no. 2240.
abstract: A new hTopo I isomerase inhibitor, (+)-3,3',7,7',8,8'-hexahydroxy-5,5'-dimethylbianthraquinone (2240A), was isolated from the mangrove endophytic fungus no. 2240 collected from an estuarine mangrove at the South China Sea coast. Its structure was elucidated by spectral analyses including two-dimensional NMR, HR-EI-MS, IR, and UV. The hTopo I isomerase inhibition experiment showed that 2240A (1) possessed strong inhibiting activity. When its inhibition concentration was 4.65 micromol/l, its percent inhibition rate was 59.1%, while the lowest inhibition concentration of the positive control camptothecin was 1.00 x 10(3) micromol/l.
authors.affiliation: School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou, China.
authors.forename: Ni
authors.initials: N
authors.lastname: Tan
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Cai
authors.forename: San-Yong
authors.initials: SY
authors.lastname: Wang
authors.forename: Jia-Hui
authors.initials: JH
authors.lastname: Pan
authors.forename: Yi-Wen
authors.initials: YW
authors.lastname: Tao
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: She
authors.forename: Shi-Ning
authors.initials: SN
authors.lastname: Zhou
authors.forename: Yong-Cheng
authors.initials: YC
authors.lastname: Lin
authors.forename: Lilian L P
authors.initials: LL
authors.lastname: Vrijmoed
mesh_terms: D000880:Anthraquinones / Q000737:chemistry* / Q000494:pharmacology*; D005658:Fungi / Q000737:chemistry*; D006801:Humans; D015394:Molecular Structure; D059004:Topoisomerase I Inhibitors
chemical_list: C532676:3,3',7,7',8,8'-hexahydroxy-5,5'-dimethylbianthraquinone; D000880:Anthraquinones; D059004:Topoisomerase I Inhibitors