title: 5-alkynyl analogs of arabinouridine and 2'-deoxyuridine: cytostatic activity against herpes simplex virus and varicella-zoster thymidine kinase gene-transfected cells.
abstract: A group of arabinouridines (TMSEAU, EAU, IEAU-TA) and 2'-deoxyuridines (TMSEDU, EDU, IEDU) having a variety of substituents at the uracil C-5 position (trimethylsilylethynyl, TMSE; ethynyl, E; or iodoethynyl, IE), and the sugar C-2' position (2'-arabino OH in arabinouridine, AU; or 2'-deoxyribo H in 2'-deoxyuridine, DU) were prepared to acquire antiviral structure-activity relationships. A broad-spectrum viral panel screen showed that these 5-alkynylarabino/deoxy-uridines exhibit moderate anti-HSV-1 activity, with no difference in potency between arabinouridines and 2'-deoxyuridines. The 2'-deoxyuridines TMSEDU, EDU, and IEDU, unlike the arabinouridines, exhibited potent antiviral activity against cytomegalovirus, but they were also highly cytostatic. The abilities of the 5-alkynylarabino/deoxy-uridines to inhibit nontransfected (wild-type or thymidine kinase-deficient, tk-) and viral gene transfected (HSV-1, HSV-2, or VZV thymidine kinase-positive, tk+) FM3A and OST (osteosarcoma) cells were determined. This group of 5-alkynylarabino/deoxy-uridines showed an enhanced ability to inhibit cells transfected with a viral thymidine kinase gene (HSV-1tk+, HSV-2tk+, VZVtk+) relative to wild-type or thymidine kinase-deficient (tk-) cells.
authors.affiliation: Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2N8.
authors.forename: Walter A
authors.initials: WA
authors.lastname: Cristofoli
authors.forename: Leonard I
authors.initials: LI
authors.lastname: Wiebe
authors.forename: Erik
authors.initials: E
authors.lastname: De Clercq
authors.forename: Graciela
authors.initials: G
authors.lastname: Andrei
authors.forename: Robert
authors.initials: R
authors.lastname: Snoeck
authors.forename: Jan
authors.initials: J
authors.lastname: Balzarini
authors.forename: Edward E
authors.initials: EE
authors.lastname: Knaus
mesh_terms: D000480:Alkynes / Q000138:chemical synthesis* / Q000494:pharmacology; D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000494:pharmacology; D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002460:Cell Line; D045744:Cell Line, Tumor; D002522:Chlorocebus aethiops; D003857:Deoxyuridine / Q000031:analogs & derivatives / Q000138:chemical synthesis / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D014645:Herpesvirus 3, Human / Q000187:drug effects / Q000201:enzymology*; D006801:Humans; D051379:Mice; D018139:Simplexvirus / Q000187:drug effects / Q000201:enzymology*; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D013937:Thymidine Kinase / Q000096:biosynthesis / Q000235:genetics*; D014162:Transfection; D014529:Uridine / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: D000480:Alkynes; D000970:Antineoplastic Agents; D000998:Antiviral Agents; D013937:Thymidine Kinase; D003857:Deoxyuridine; D014529:Uridine