title: Discovery of the first series of small molecule H5N1 entry inhibitors.
abstract: The occurrence of highly pathogenic avian influenza virus H5N1 highlights the urgent need for new classes of antiviral drugs. Inhibition of H5N1 entry into cells may be an effective strategy. We report the first three small molecule inhibitors saponins with 3-O-beta-chacotriosyl residue, which showed potent inhibitory activity with IC(50) of 7.22-9.25 microM. The subsequent SAR studies showed the 3-O-beta-chacotriosyl residue was essential for the activity, and the aglycone structure also affected the activity.
authors.affiliation: Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
authors.forename: Gaopeng
authors.initials: G
authors.lastname: Song
authors.forename: Sen
authors.initials: S
authors.lastname: Yang
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Yingli
authors.initials: Y
authors.lastname: Cao
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Ning
authors.initials: N
authors.lastname: Ding
authors.forename: Zaihong
authors.initials: Z
authors.lastname: Zhang
authors.forename: Ying
authors.initials: Y
authors.lastname: Guo
authors.forename: Yingxia
authors.initials: Y
authors.lastname: Li
mesh_terms: D000998:Antiviral Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D055808:Drug Discovery; D006801:Humans; D053124:Influenza A Virus, H5N1 Subtype / Q000187:drug effects* / Q000502:physiology*; D012503:Saponins / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D013329:Structure-Activity Relationship; D053586:Virus Internalization / Q000187:drug effects*
chemical_list: D000998:Antiviral Agents; D012503:Saponins