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Simplification to dual-therapy containing lamivudine and darunavir/ritonavir or atazanavir/ritonavir in HIV-infected patients on virologically suppressive antiretroviral therapy.

Simplification to dual-therapy containing lamivudine and darunavir/ritonavir or atazanavir/ritonavir in HIV-infected patients on virologically suppressive antiretroviral therapy.
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Calza L, Cafaggi M, Colangeli V, Borderi M, Barchi E, Lanzafame M, Nicole' S, Degli Antoni AM, Bon I, Re MC, Viale P,


Calza L, Cafaggi M, Colangeli V, Borderi M, Barchi E, Lanzafame M, Nicole' S, Degli Antoni AM, Bon I, Re MC, Viale P, (click to view)

Calza L, Cafaggi M, Colangeli V, Borderi M, Barchi E, Lanzafame M, Nicole' S, Degli Antoni AM, Bon I, Re MC, Viale P,

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Infectious diseases (London, England) 2017 12 06() 1-9 doi 10.1080/23744235.2017.1410285

Abstract
BACKGROUND
The ritonavir-boosted protease inhibitor (PI/r)-based dual regimens are warranted in order to optimize the combination antiretroviral therapy (cART), prevent the long-term toxicity and reduce the cost of treatments.

METHODS
We performed an observational, retrospective study of HIV-infected patients on suppressive antiretroviral therapy who switched to a dual regimen containing lamivudine (3TC) plus darunavir/ritonavir (DRV/r) 800/100 mg qd or atazanavir/ritonavir (ATV/r) 300/100 mg qd.

RESULTS
As a whole, 122 well-treated patients (mean age, 45.2 years; mean CD4 T + lymphocyte count, 589 cells/mm3; mean duration of current cART, 3.1 years) were enrolled. Current antiretroviral regimen included tenofovir/emtricitabine in 91 subjects, abacavir/lamivudine in 25, lopinavir/r in 41, DRV/r in 38 and ATV/r in 33. Baseline mean estimated glomerular filtration rate (eGFR) was 94.2 mL/min/1.73 m2, and proteinuria was detected in 46 subjects (38%). Overall 70 subjects switched to 3TC + DRV/r (group A) and 52 to 3TC + ATV/r (group B). After 12 months, 65 patients (92.8%) in group A and 46 (88.4%) in group B showed HIV RNA <20 copies/mL. A significant and comparable increase in eGFR was observed in group A and B (+3.8 and +3.1 mL/min/1.73 m2, respectively), such as a significant decrease in prevalence of proteinuria. A significantly greater increase in total bilirubin concentration was reported in group B than in group A. CONCLUSION
In our study, simplification to a dual therapy containing 3TC + DRV/r or ATV/r in virologically suppressed patients was effective and showed a good tolerability profile.

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