OBJECTIVE: The primary objective was to compare the change in fasting low-density lipoprotein (LDL) cholesterol from baseline to week 12 between patients receiving an atazanavir-containing regimen and those receiving comparator protease inhibitor (PI) regimens. DESIGN: AI424-067 was a 48-week, open-label, randomized, prospective study of 246 patients on PI-based regimens withhyperlipidemia [fasting LDL cholesterol >130 mg/dL (>3.4 mmol/L)] and with HIV RNA <50 copies per milliliter. Patients were randomized to switch to atazanavir (400 mg once daily) on day 1 (immediate switch) or maintain current PI regimen for the first 24 weeks, then switch to atazanavir (delayed switch). METHODS:Plasma lipid levels were compared with baseline values at weeks 12, 24, and 48. Safety, viral load, and CD4 profiles were also evaluated. RESULTS: At week 12, the mean percent changes in LDL cholesterol from baseline for the immediate-switch and delayed-switch groups were -15% and +1%, respectively (P < 0.0001). Favorable LDL cholesterol levels in the immediate-switch group were sustained through week 48. Both groups maintained comparable virologic control. Switching to atazanavir did not produce a significant change in safety or tolerability. CONCLUSIONS: A switch-either immediate or delayed-from a boosted or unboosted PI to unboosted atazanavir in patients with hyperlipidemia was associated with improvements in plasma lipid parameters without loss of virological suppression.
RCT Entities:
OBJECTIVE: The primary objective was to compare the change in fasting low-density lipoprotein (LDL) cholesterol from baseline to week 12 between patients receiving an atazanavir-containing regimen and those receiving comparator protease inhibitor (PI) regimens. DESIGN: AI424-067 was a 48-week, open-label, randomized, prospective study of 246 patients on PI-based regimens with hyperlipidemia [fasting LDL cholesterol >130 mg/dL (>3.4 mmol/L)] and with HIV RNA <50 copies per milliliter. Patients were randomized to switch to atazanavir (400 mg once daily) on day 1 (immediate switch) or maintain current PI regimen for the first 24 weeks, then switch to atazanavir (delayed switch). METHODS: Plasma lipid levels were compared with baseline values at weeks 12, 24, and 48. Safety, viral load, and CD4 profiles were also evaluated. RESULTS: At week 12, the mean percent changes in LDL cholesterol from baseline for the immediate-switch and delayed-switch groups were -15% and +1%, respectively (P < 0.0001). Favorable LDL cholesterol levels in the immediate-switch group were sustained through week 48. Both groups maintained comparable virologic control. Switching to atazanavir did not produce a significant change in safety or tolerability. CONCLUSIONS: A switch-either immediate or delayed-from a boosted or unboosted PI to unboosted atazanavir in patients with hyperlipidemia was associated with improvements in plasma lipid parameters without loss of virological suppression.
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