title: Antiviral activity of raoulic acid from Raoulia australis against Picornaviruses.
abstract: RNA viruses are a major source of respiratory diseases worldwide. The lack of effective therapeutical treatment underlines the importance of research for new antiviral compounds. Raoulic acid is a principal ingredient of the plant Raoulia australis Hook. F. Antiviral assay using cytopathic effect (CPE) reduction method showed that raoulic acid possessed strong antiviral activity against human rhinovirus 2 (HRV2) with a 50% inhibition concentration (IC(50)) value of less than 0.1mug/ml, human rhinovirus 3 (HRV3) with a IC(50) value of 0.19 microg/ml, coxsackie B3 (CB3) virus with IC(50) values of 0.33 microg/ml, coxsackie B4 (CB4) virus with IC(50) values of 0.40 microg/ml, and enterovirus 71 (EV71) virus with IC(50) values of less than 0.1 microg/ml. However, the compound did not possess antiviral activity against influenza A (Flu A/PR, Flu A/WS, H1N1) and B viruses at four concentrations ranging from 0.1 to 100 microg/ml.
authors.affiliation: Natural Medicines Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Republic of Korea.
authors.forename: H J
authors.initials: HJ
authors.lastname: Choi
authors.forename: C H
authors.initials: CH
authors.lastname: Lim
authors.forename: J H
authors.initials: JH
authors.lastname: Song
authors.forename: S H
authors.initials: SH
authors.lastname: Baek
authors.forename: D H
authors.initials: DH
authors.lastname: Kwon
mesh_terms: D000998:Antiviral Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D019659:Asteraceae; D006367:HeLa Cells; D006801:Humans; D008517:Phytotherapy; D012328:RNA Viruses / Q000187:drug effects*; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000998:Antiviral Agents; D013729:Terpenes; C535205:raoulic acid