title: DNA damaging activity of ellagic acid derivatives.
abstract: A strain of yeast rendered repair deficient by the conditional expression of the RAD52 locus was used to search for natural products capable of damaging DNA. Four ellagic acid derivatives, namely 3,3'-dimethyl-4'-O-beta-D-glucopyranosyl ellagic acid (1), 3,3',4-trimethyl-4'-O-beta-D-glucopyranosyl ellagic acid (2), 3'-methyl-3,4-O,O-methylidene ellagic acid (3) and 3'-methyl-3,4-O,O-methylidene-4'-O-beta-D-glucopyranosyl ellagic acid (4), were identified by this assay as DNA damaging natural principles from several plants, including Alangium javanicum, Anisophyllea apetala, Crypteronia paniculata, Mouririi sp. and Scholtzia parviflora. Although none of the isolated principles mediated frank strand scission of DNA in vitro, all of them potently inhibited the growth of yeast in the absence of expression of RAD52.
authors.affiliation: Departments of Chemistry and Biology, University of Virginia, Charlottesville, VA 22901, USA. sidhecht@virginia.edu
authors.forename: Ya-ming
authors.initials: YM
authors.lastname: Xu
authors.forename: Jing-Zhen
authors.initials: JZ
authors.lastname: Deng
authors.forename: Ji
authors.initials: J
authors.lastname: Ma
authors.forename: Shao-Nong
authors.initials: SN
authors.lastname: Chen
authors.forename: Rebekah
authors.initials: R
authors.lastname: Marshall
authors.forename: Shannon H
authors.initials: SH
authors.lastname: Jones
authors.forename: Randall K
authors.initials: RK
authors.lastname: Johnson
authors.forename: Sidney M
authors.initials: SM
authors.lastname: Hecht
mesh_terms: D001681:Biological Assay; D004249:DNA Damage / Q000187:drug effects*; D004278:DNA, Superhelical / Q000187:drug effects; D004610:Ellagic Acid / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology; D010944:Plants / Q000737:chemistry; D012441:Saccharomyces cerevisiae / Q000235:genetics; D013329:Structure-Activity Relationship
chemical_list: D004278:DNA, Superhelical; D010936:Plant Extracts; D004610:Ellagic Acid