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Sustained Virologic Suppression With Dolutegravir/Lamivudine in a Test-and-Treat Setting Through 48 Weeks.
Open Forum Infectious Diseases 2023 March
BACKGROUND: We assessed the efficacy and safety of dolutegravir/lamivudine (DTG/3TC) in a US test-and-treat setting at a secondary 48-week time point of the multicenter, single-arm, phase IIIb STAT study.
METHODS: Participants were eligible adults newly diagnosed with human immunodeficiency virus (HIV)-1 and had started once-daily DTG/3TC within 14 days of diagnosis, before laboratory results were available. Antiretroviral therapy (ART) was modified if baseline testing indicated DTG or 3TC resistance, hepatitis B virus (HBV) coinfection, or creatinine clearance <30 mL/min per 1.73 m2 , and these participants remained in the study. A proportion with HIV-1 ribonucleic acid (RNA) <50 copies/mL at Week 48 was calculated among all participants (intention-to-treat-exposed [ITT-E] missing = failure analysis) and those with available data (observed analysis).
RESULTS: At Week 48, 82% of all participants regardless of ART (107 of 131; ITT-E missing = failure) and 97% with available data (107 of 110; observed analysis) achieved HIV-1 RNA <50 copies/mL. High proportions of virologic response were seen overall, including in participants with high viral load (≥500 000 copies/mL; 89%) or low CD4+ cell count (<200 cells/mm3 ; 78%) at baseline. Ten participants had treatment modification (baseline HBV coinfection, n = 5; participant/proxy decision, n = 2; baseline M184V resistance mutation, adverse event [AE; rash], and pregnancy, n = 1 each) before Week 48. Two participants met confirmed virologic failure criteria. No treatment-emergent resistance was observed. Ten participants reported drug-related AEs (all grade 1-2); no serious drug-related AEs occurred.
CONCLUSIONS: Results demonstrated high proportions of participants with sustained virologic suppression, no treatment-emergent resistance, and good safety over 48 weeks, supporting first-line use of DTG/3TC in a test-and-treat setting.
METHODS: Participants were eligible adults newly diagnosed with human immunodeficiency virus (HIV)-1 and had started once-daily DTG/3TC within 14 days of diagnosis, before laboratory results were available. Antiretroviral therapy (ART) was modified if baseline testing indicated DTG or 3TC resistance, hepatitis B virus (HBV) coinfection, or creatinine clearance <30 mL/min per 1.73 m2 , and these participants remained in the study. A proportion with HIV-1 ribonucleic acid (RNA) <50 copies/mL at Week 48 was calculated among all participants (intention-to-treat-exposed [ITT-E] missing = failure analysis) and those with available data (observed analysis).
RESULTS: At Week 48, 82% of all participants regardless of ART (107 of 131; ITT-E missing = failure) and 97% with available data (107 of 110; observed analysis) achieved HIV-1 RNA <50 copies/mL. High proportions of virologic response were seen overall, including in participants with high viral load (≥500 000 copies/mL; 89%) or low CD4+ cell count (<200 cells/mm3 ; 78%) at baseline. Ten participants had treatment modification (baseline HBV coinfection, n = 5; participant/proxy decision, n = 2; baseline M184V resistance mutation, adverse event [AE; rash], and pregnancy, n = 1 each) before Week 48. Two participants met confirmed virologic failure criteria. No treatment-emergent resistance was observed. Ten participants reported drug-related AEs (all grade 1-2); no serious drug-related AEs occurred.
CONCLUSIONS: Results demonstrated high proportions of participants with sustained virologic suppression, no treatment-emergent resistance, and good safety over 48 weeks, supporting first-line use of DTG/3TC in a test-and-treat setting.
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