title: Isolation and structure elucidation of a new potent anti-neoplastic diterpene from Dendrostellera lessertii.
abstract: Two diterpene esters were isolated from Dendrostellera lessertii. These compounds were identified as compound I (12-O-benzoyl-3,5-hydroxy-6,7-epoxy-resiniferonol-9,13,14-orthobenzoate) and compound 11 (12-O-benzoyl-5-hydroxy-6,7-epoxy-resiniferonol-9,13,14-orthodecanoate). Cytotoxicity evaluation of these two compounds, using seven different cancerous cell lines, indicated that compound I with IC50 of 5-25 nmol, is 2.5 times more active than compound II. Using flow cytometry technique, it was found that treatment of the most responsive cells (K562) with compound I inhibited the progression of cells through G1 phase by almost 20% compared to the untreated cells.
authors.affiliation: Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.
authors.forename: H
authors.initials: H
authors.lastname: Sadeghi
authors.forename: R
authors.initials: R
authors.lastname: Yazdanparast
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D002453:Cell Cycle / Q000187:drug effects*; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004354:Drug Screening Assays, Antitumor; D005260:Female; D006801:Humans; D008297:Male; D009369:Neoplasms / Q000473:pathology*; D018515:Plant Leaves; D029645:Thymelaeaceae / Q000737:chemistry*; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D004224:Diterpenes