O213. Low-level viraemia during treatment with darunavir/r monotherapy versus DRV/r + 2NRTIs in the MONET trial
© Clumeck et al; licensee BioMed Central Ltd. 2010
Published: 8 November 2010
Patients with HIV RNA suppression below 50 copies/mL may still have HIV RNA detectable by more sensitive PCR assay techniques.
In the MONET trial, 256 patients with HIV RNA <50 copies/mL on current HAART, and no history of virological failure, switched to DRV/r 800/100 mg once daily, either as monotherapy (n=127) or with 2NRTI (n=129). HIV RNA was evaluated by the Roche Amplicor Ultrasensitive assay (lower detection limit=50 copies/mL), for all patient visits to Week 96. With this assay, "Optical Density=background" was used to assess whether HIV RNA was detectable or undetectable below 50 copies/mL.
DRV/r mono (n=105)
DRV/r + 2NRTIs (n=114
HIV RNA <50, OD = background
HIV RNA <50, detectable
HIV RNA 50-400 copies/mL
HIV RNA <400 copies/mL
Including all samples from patient visits from Week 4 to Week 96, HIV RNA was above 50 copies/mL in 69/1009 samples in the DRV/r monotherapy arm (50-400: 84%, 400-1000: 12%, >1000: 4%) and 47/1051 samples in the DRV/r + 2NRTI arm (50-400: 83%, 400-1000: 8.5%, >1000: 8.5%).
In this study for patients with HIV RNA <50 copies/mL at baseline, switching to DRV/r monotherapy showed similar levels of HIV RNA suppression to DRV/r + 2NRTIs, using more sensitive PCR assay techniques.
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