Efficacy of Atazanavir/Ritonavir Monotherapy as Maintenance in Patients With Viral Suppression

HIV-1 Infection Clinical Trial

Official title: Efficacy of Atazanavir / Ritonavir Monotherapy as Maintenance in Patients With Viral Suppression. Randomized, Open Label Non Inferiority Trial. A Phase 3 Study.

Status Completed

Clinical Trial Summary

The study will assess whether Atazanavir/ritonavir monotherapy provides a non-inferior proportion of virological efficacy with respect to ATV/RTV + 2 NRTIs in patients with stable suppressed viremia and no prior virologic failures.

Clinical Trial Description

This is a randomised (1:1), multicentre, comparative, parallel-group, prospective, open label, non-inferiority controlled clinical trial.

Enrolled patients, taking an ATV/r based HAART and with stable HIV-RNA < 50c/ml (24 weeks), will be randomized to:

• continue the same regimen ATV/RTV 300mg/100mg OD plus 2 NRTIs (according to the specific dosing schedule) as backbone (HAART arm) with ATV/r

• or simplify therapy to ATV/RTV 300mg/100mg OD as monotherapy (Monotherapy arm) with ATV/r The study follow up will be 96 weeks after randomization and primary objective will be evaluated at week 48.

Patients will be followed every 4 weeks for the first 16 weeks, and then every 8 weeks until week 48, then every 12 weeks until week 96 or discontinuation ; at each visit the following evaluations will be performed:

• clinical assessment.

• routine laboratory tests (hematological tests and hematochemistry) including creatinine, phosphorus, calcium, alkaline phosphatase, gammaGT; urine analysis, lipid profile, level of HIV-RNA and CD4 cell counts.

During follow-up, at randomization, week 48, week 96 or discontinuation, patients will additionally undergo:

• Fat redistribution evaluation by DEXA (dual-energy X-ray absorptiometry

• Vertebral and femoral bone mineral density evaluation by DEXA.

• ECG;

• Glicate haemoglobin.

• Adherence assessment (questionnaire and/or pills counts).

• Neurocognitive evaluation [HIV-associated neurocognitive disorders (HANDs) evaluated by validated neuropsychological tests].

In case of viral rebound (defined as 2 consecutive measurement of HIV-RNA > 50 c/ml) patients will be immediately contacted in order to perform genotypic tests. Furthermore a plasma PK analysis will also be performed. Any patients with virological rebound will be selected for a reintensification therapy with NRTIs and if not suppressed after 12 weeks they will be discontinued. ;

Related Conditions & MeSH terms

• HIV-1 Infection

• NCT number: NCT01511809
• Study type: Interventional
• Source: IRCCS San Raffaele
• Status: Completed
• Phase: Phase 3
• Start date: September 2010
• Completion date: May 2015