title: Non-nucleoside reverse transcriptase inhibitor failure impairs HIV-RNA responses to efavirenz-containing salvage antiretroviral therapy.
abstract: In a retrospective cohort study of salvage antiretroviral combination therapy including efavirenz, 60% of 51 patients were able to suppress HIV RNA by at least 1 log10 or to less than 50 copies/ml. A lack of the previous use of non-nucleoside reverse transcriptase inhibitors was the only factor predictive of response on multivariate analysis. No patient with a viral isolate with an increased IC50 to efavirenz by virtual phenotype had a virological response
authors.affiliation: Toronto General Hospital Immunodeficiency Clinic, University Health Network, University of Toronto, Ontario, Canada.
authors.forename: S L
authors.initials: SL
authors.lastname: Walmsley
authors.forename: D V
authors.initials: DV
authors.lastname: Kelly
authors.forename: A L
authors.initials: AL
authors.lastname: Tseng
authors.forename: A
authors.initials: A
authors.lastname: Humar
authors.forename: P R
authors.initials: PR
authors.lastname: Harrigan
mesh_terms: D000328:Adult; D000480:Alkynes; D019380:Anti-HIV Agents / Q000627:therapeutic use*; D048588:Benzoxazines; D003521:Cyclopropanes; D004359:Drug Therapy, Combination; D015658:HIV Infections / Q000188:drug therapy / Q000821:virology*; D015497:HIV-1 / Q000187:drug effects / Q000302:isolation & purification*; D006801:Humans; D008297:Male; D010078:Oxazines / Q000627:therapeutic use*; D012367:RNA, Viral / Q000097:blood*; D018894:Reverse Transcriptase Inhibitors / Q000627:therapeutic use*; D016879:Salvage Therapy; D016896:Treatment Outcome
chemical_list: D000480:Alkynes; D019380:Anti-HIV Agents; D048588:Benzoxazines; D003521:Cyclopropanes; D010078:Oxazines; D012367:RNA, Viral; D018894:Reverse Transcriptase Inhibitors; C098320:efavirenz