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  • Title: Dual therapy with ritonavir-boosted protease inhibitor (PI) plus lamivudine versus triple therapy with ritonavir-boosted PI plus two nucleos(t)ide reverse-transcriptase inhibitor in HIV-infected patients with viral suppression.
    Author: Hung TC, Chen GJ, Cheng SH, Chen JH, Wei JL, Cheng CY, Hung CC.
    Journal: J Microbiol Immunol Infect; 2019 Dec; 52(6):865-871. PubMed ID: 31422059.
    Abstract:
    BACKGROUND: Dual antiretroviral regimens are attractive options to optimize the combination antiretroviral therapy in light of potential toxicities with long-term cumulative exposure to nucleos(t)ide reverse-transcriptase inhibitors (NRTIs). METHODS: In this retrospective observational study, we included HIV-infected patients on suppressive antiretroviral therapy with plasma viral load (PVL) < 200 copies/mL for at least 6 months who were switched to dual regimens containing lamivudine (3TC) (150 mg twice daily or 300 mg once daily) plus lopinavir/ritonavir (LPV/r) 250/50 mg twice daily or darunavir/ritonavir (DRV/r) 800/100 mg once daily. Patients maintaining on suppressive triple therapy with DRV/r or LPV/r plus two NRTIs were included for comparisons. The primary endpoint was the proportion of patients with PVL <50 copies/mL after 48 weeks of follow-up. RESULTS: In total, 364 patients were included with 93 (25.5%) switched to dual therapy After 48 weeks of observation, PVL <50 copies/mL was observed in 96.8% and 94.1% of dual-therapy and triple-therapy group, respectively, in per-protocol analysis (difference 2.7%; 95% CI -2.5%-7.9%). Nineteen patients (3 [3.2%] in dual-therapy and 16 [7.6%] in triple-therapy group) developed virologic failure, with none having emergent M184V resistance-associated mutation. A statistically significant increase of cholesterol level (13 mg/dL versus 2 mg/dL, p = 0.003) and high-density lipoprotein (3 mg/dL versus -2 mg/dL, p = 0.019) were observed in dual-therapy than in triple-therapy group. Changes of triglyceride, low-density lipoprotein and glycated hemoglobin levels were similar between the two groups. CONCLUSION: Dual therapy with DRV/r or LPV/r plus lamivudine demonstrated similar effectiveness in maintaining viral suppression to triple therapy.
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