title: Bioactive triterpenoids from Kadsura heteroclita.
abstract: A phytochemical study of Kadsura heteroclita led to the isolation of eight triterpenoids, including two new compounds, named kadheterilactone A (1) and kadheterilactone B (2), as well as six known compounds, longipedlactone H (3), longipedlactone A (4), longipedlactone F (5), kadsuranic acid A (6), nigranoic acid (7), and schisandronic acid (8). Their structures were elucidated on the basis of spectroscopic methods, including 2D NMR techniques. The cytotoxic activities of 1-8 were tested against several tumor cell lines by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium hydrobromide (MTT) assay in vitro. As a result, 4 and 5 turned out to be significantly cytotoxic against Hep-G2 and Bel-7402 tumor cell lines. All compounds were also tested for inhibition on HIV-1 protease (PR) and reverse transcriptase (RT). Compounds 6 and 7 showed strong inhibition on HIV-1 PR, while 8 exhibited moderate activity, others were only weakly active. No compounds were active against HIV-1 RT.
authors.affiliation: Institute of Medicinal Plant Development, Peking Union Medical College & Chinese Academy of Medical Sciences, No. 151 Malianwa North Road, Haidian District, Beijing, P. R. China.
authors.forename: Li-Jia
authors.initials: LJ
authors.lastname: Xu
authors.forename: Zong-Gen
authors.initials: ZG
authors.lastname: Peng
authors.forename: Hong-Shan
authors.initials: HS
authors.lastname: Chen
authors.forename: Jie
authors.initials: J
authors.lastname: Wang
authors.forename: Pei-Gen
authors.initials: PG
authors.lastname: Xiao
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D017320:HIV Protease Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D015497:HIV-1 / Q000187:drug effects / Q000201:enzymology; D006801:Humans; D032135:Kadsura / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D013329:Structure-Activity Relationship; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D017320:HIV Protease Inhibitors; D014315:Triterpenes