title: Influence of stereochemistry on antiviral activities and resistance profiles of dideoxycytidine nucleosides.
abstract: beta-L-2',3'-Dideoxycytidine (beta-L-ddC) and beta-L-5-fluoro-2',3'-dideoxycytidine (5-F-beta-L-ddC) were prepared and shown to have potent activity against human immunodeficiency virus type 1 (HIV-1) and hepatitis B virus (HBV). These compounds were compared with beta-D-2',3'-dideoxycytidine (beta-D-ddC) and two beta-L-oxathiolane nucleosides (beta-L-3'-thio-2',3'-dideoxycytidine and beta-L-5-fluoro-3'-thio-2',3'-dideoxycytidine) in terms of anti-HIV and anti-HBV activity, cytotoxicity, and development of HIV-1 resistance. Compared with beta-D-ddC, the beta-L-dideoxycytidine nucleosides had similar anti-HIV-1 activities, significantly greater anti-HBV activities, and decreased toxicities to a B-cell line, T-cell lines, and human bone marrow progenitor cells. HIV-1 strains resistant to beta-D-ddC were susceptible to the beta-L-ddC analogs. Compared with the beta-L-oxathiolane nucleosides, beta-L-ddC and 5-F-beta-L-ddC had similar anti-HIV-1 activities, decreased anti-HBV activities, and greater toxicities to B- and T-cell lines and bone marrow progenitor cells. There were similarities between the beta-L-ddC and beta-L-oxathiolane nucleosides in the rate of development and pattern of resistant HIV-1 selection. While the in vitro activity and cytotoxicity profiles of the beta-L-ddC nucleosides differed from those of the beta-D-ddC and beta-L-oxathiolane nucleosides, the data presented herein suggest that the sugar configuration of a dideoxynucleoside analog may play a major role in the rate of development and the pattern of HIV-1 resistance.
authors.affiliation: Division of Experimental Therapy, Burroughs Wellcome Co., Research Triangle Park, North Carolina 27709.
authors.forename: N A
authors.initials: NA
authors.lastname: Van Draanen
authors.forename: M
authors.initials: M
authors.lastname: Tisdale
authors.forename: N R
authors.initials: NR
authors.lastname: Parry
authors.forename: R
authors.initials: R
authors.lastname: Jansen
authors.forename: R E
authors.initials: RE
authors.lastname: Dornsife
authors.forename: J V
authors.initials: JV
authors.lastname: Tuttle
authors.forename: D R
authors.initials: DR
authors.lastname: Averett
authors.forename: G W
authors.initials: GW
authors.lastname: Koszalka
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000737:chemistry* / Q000494:pharmacology*; D002417:Cattle; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D003114:Colony-Forming Units Assay; D003842:Deoxycytidine Kinase / Q000378:metabolism; D004352:Drug Resistance, Microbial; D054303:HIV Reverse Transcriptase; D015497:HIV-1 / Q000187:drug effects; D006515:Hepatitis B virus / Q000187:drug effects; D006801:Humans; D018894:Reverse Transcriptase Inhibitors; D013329:Structure-Activity Relationship; D013950:Thymus Gland / Q000201:enzymology; D014780:Viruses / Q000187:drug effects*; D016047:Zalcitabine / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology; D015215:Zidovudine / Q000494:pharmacology
chemical_list: D000998:Antiviral Agents; D018894:Reverse Transcriptase Inhibitors; D015215:Zidovudine; D016047:Zalcitabine; D003842:Deoxycytidine Kinase; D054303:HIV Reverse Transcriptase