title: Favorable interaction of beta-L(-) nucleoside analogues with clinically approved anti-HIV nucleoside analogues for the treatment of human immunodeficiency virus.
abstract: The combination of L(-)-2',3'-dideoxy-3'-thiacytidine (L(-)SddC, 3TC), L(-)-2',3'-dideoxy-5-fluorocytidine (L(-)FddC), or L(-)-2',3'-dideoxy-5-fluoro-3'-thiacytidine (L(-)(FTC) with 3'-azido-3'-deoxythymidine (AZT) synergistically inhibited replication of human immunodeficiency virus (HIV) in vitro. Similar synergistic activity was also obtained when these compounds were used in combination with 2',3'-didehyro-2',3'-dideoxythymidine (D4T). In terms of 2',3'- dideoxyinosime (ddI) and 2',3'-dideoxycytidine (ddC), only additive anti-HIV activity was observed. None of the beta-L(-) nucleoside analogues had additive toxicity in cell culture, and they could protect against the delayed mitochondrial toxicity associated with AZT, D4T, ddC, and ddI in drug-treated cells. Thus, combinations of beta-L(-) nucleoside analogues with any of the approved anti-HIV drugs could have a potentially beneficial outcome.
authors.affiliation: Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06510, USA.
authors.forename: E G
authors.initials: EG
authors.lastname: Bridges
authors.forename: G E
authors.initials: GE
authors.lastname: Dutschman
authors.forename: E A
authors.initials: EA
authors.lastname: Gullen
authors.forename: Y C
authors.initials: YC
authors.lastname: Cheng
mesh_terms: D000998:Antiviral Agents / Q000494:pharmacology*; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D004357:Drug Synergism; D004359:Drug Therapy, Combination; D015658:HIV Infections / Q000188:drug therapy; D015497:HIV-1 / Q000187:drug effects* / Q000502:physiology; D006801:Humans; D008826:Microbial Sensitivity Tests; D008928:Mitochondria / Q000187:drug effects; D009705:Nucleosides / Q000378:metabolism / Q000494:pharmacology* / Q000633:toxicity; D013237:Stereoisomerism; D013601:T-Lymphocytes / Q000187:drug effects / Q000821:virology; D014779:Virus Replication / Q000187:drug effects
chemical_list: D000998:Antiviral Agents; D009705:Nucleosides