96-week resistance analyses of the STaR study: rilpivirine/emtricitabine/tenofovir DF versus efavirenz/emtricitabine/tenofovir DF in antiretroviral-naive, HIV-1-infected subjects
2015
AbstractBackground:STaR (GS-US-264-0110) was a 96-week phase 3b study evaluating the safety and efficacy of two single-tablet regimens, rilpivirine/emtricitabine/tenofovir DF (RPV/FTC/TDF) and efavirenz/emtricitabine/tenofovir DF (EFV/FTC/TDF) in treatment-naive, HIV-1-infected subjects.Methods:Genotypic analyses (population sequencing) of HIV-1 protease (PR) and reverse transcriptase (RT) were performed at screening; subjects with pre-existing resistance to study drugs were excluded. The protocol-defined resistance analysis population had genotypic/phenotypic analyses at failure and baseline for PR and RT.Results:Through week 96, the resistance analysis population included 24/394 subjects (6.1%) receiving RPV/FTC/TDF and 9/392 subjects (2.3%) receiving EFV/FTC/TDF. In the RPV/FTC/TDF arm, HIV-1 isolates from 21/394 subjects (5.3%) developed non-nucleoside reverse transcriptase inhibitor (NNRTI) and/or nucleoside reverse transcriptase inhibitor (NRTI) resistance mutations and 20/21 isolates had both NNRTI...
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