Dual therapy with a combination of unboosted atazanavir and lamivudine as maintenance treatment in virologically suppressed <scp>HIV</scp>‐1‐infected patients

Rigo, F.; Cucchetto, Giulia; Lanzafame, Massimiliano; Nicolè, Stefano; Lattuada, Emanuela; Concia, Ercole; Vento, Sandro

doi:10.1111/hiv.12523

Cited by 1 publication

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“…Both trials demonstrated the non-inferiority of this combination compared to ATV rtv + 2 plus two NRTIs in long-term supressed patients. To our knowledge, only two studies of dual therapy comprising ATV 400 plus 3TC [ 19 – 20 ] are available. In one, patients with virological suppression on ATV 400 plus two NRTIs were switched to ATV 400 plus 3TC or emtricitabine, without any VF or discontinuation after 48 weeks.…”

Section: Discussionmentioning

confidence: 99%

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No difference in effectiveness of treatment simplification to boosted or unboosted atazanavir plus lamivudine in virologically suppressed in HIV-1-infected patients

et al. 2018

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BackgroundSimplification strategies of antiretroviral treatment represent effective tools for the reduction of drug-induced toxicity, resistance mutations in case of virological failure and costs.ObjectivesTo assess the effectiveness of simplification to atazanavir/ritonavir (ATVrtv) or unboosted atazanavir (ATV400) plus lamivudine, and if low plasma or intracellular ATV Ctrough influence virological outcomes.MethodsAmbispective observational study in patients with undetectable HIV-RNA who were switched to ATVrtv or ATV400 plus lamivudine once daily. Previous virological failures (VF) were allowed if the resistance tests showed major resistance mutation neither to ATV nor to lamivudine. VF was defined as two consecutive plasma HIV-RNA >200 copies/mL. Effectiveness was assessed by intention-to-treat and on-treatment analyses. Plasma and intracellular ATV Ctrough were measured by LC-MS/MS.ResultA total of 246 patients were included. At week 48, the Kaplan–Meier estimation of efficacy within the ATVrtv and ATV400 groups were 85.9% [95% confidence interval, (CI95), 80.3–91.4%] versus 87.6% (CI95, 80.1–94.1%) by intention-to-treat analysis (p = 0.684), and 97.7% (CI95, 95.2–100%) versus 98.8% (CI95, 97.0–100%) by on-treatment analysis (p = 0.546), respectively. Plasma and intracellular Ctrough were significantly higher with ATVrtv than with ATV400 (geometric mean (GM), 318.3 vs. 605.9 ng/mL; p = 0.013) and (811.3 vs. 2659.2 ng/mL; p = 0.001), respectively. Only 14 patients had plasma Ctrough below the suggested effective concentration for ATV (150 ng/mL). No relationship between plasma or intracellular Ctrough and VF or blips were found.ConclusionBoosted or unboosted ATV plus lamivudine is effective and safe, and the lower plasma Ctrough observed with ATV400 do not compromise the effectiveness of these simplification regimens in long-term virologically suppressed HIV-1-infected patients.

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Section: Discussionmentioning

confidence: 99%

“…However, dual therapy comprising ATV 400 plus 3TC has been rarely explored, although some data suggest similar effectiveness as compared to ATV rtv plus 3TC in patients on long-lasting virological suppression [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%