title: Bioactive compounds from Rhodiola rosea (Crassulaceae).
abstract: The methanol extract of the underground part of Rhodiola rosea was found to show inhibitory activity against Staphylococcus aureus. Bioactivity-guided fractionation of a 95% ethanol extract from the stems of R. rosea led to the isolation of five compounds: gossypetin-7-O-L-rhamnopyranoside (1), rhodioflavonoside (2), gallic acid (3), trans-p-hydroxycinnamic acid (4) and p-tyrosol (5). Their structures were elucidated by UV, IR, MS and NMR data, as well as by comparison with those of the literature. Compounds 1 and 2 were evaluated for their antibacterial and antiprostate cancer cell activities. Compounds 1 and 2 exhibited activity against Staphylococcus aureus with minimum inhibitory concentrations of 50 microg/mL and 100 microg/mL, respectively. Cytotoxicity studies of 1 and 2 also displayed activity against the prostate cancer cell line with IC(50) values of 50 microg/mL and 80 microg/mL, respectively.
authors.affiliation: Department of Botany, University of British Columbia, Vancouver, Canada. dsming@interchange.ubc.ca
authors.forename: Dong Sheng
authors.initials: DS
authors.lastname: Ming
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Hillhouse
authors.forename: Emma S
authors.initials: ES
authors.lastname: Guns
authors.forename: Andy
authors.initials: A
authors.lastname: Eberding
authors.forename: Sherwin
authors.initials: S
authors.lastname: Xie
authors.forename: Selvarani
authors.initials: S
authors.lastname: Vimalanathan
authors.forename: G H Neil
authors.initials: GH
authors.lastname: Towers
mesh_terms: D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D000972:Antineoplastic Agents, Phytogenic / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D045744:Cell Line, Tumor; D006801:Humans; D020128:Inhibitory Concentration 50; D008826:Microbial Sensitivity Tests; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D018517:Plant Roots; D018547:Plant Stems; D029771:Rhodiola; D013211:Staphylococcus aureus / Q000187:drug effects*
chemical_list: D000900:Anti-Bacterial Agents; D000972:Antineoplastic Agents, Phytogenic; D010936:Plant Extracts