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Nevirapine (NVP) vs ritonavir-boosted atazanavir (ATV/r) combined with tenofovir/emtricitabine (TDF/FTC) in first-line therapy: NEWART 48-week data

Purpose of study

Until recently, few prospective data existed to indicate safety/efficacy of NVP with entry CD4 count restricted to <250 (women) or <400 (men) cells/mm3. Two phase IV trials, ARTEN and NEWART, compared virologic safety/efficacy of NVP vs ATV/r on a background of TDF/FTC in HIV+ patients within these CD4 ranges. NEWART (US) was designed to be confirmatory of ARTEN and to supplement ARTEN data [1].

Methods

In NEWART, treatment naïve patients were randomized to open-label NVP 200mg BID (lead-in dose 200mg QD x 14 days) or ATV/r (300/100mg) plus TDF/FTC (300/200mg). Women had CD4 counts (cells/mm3) <250; men <400. Primary endpoint was virologic response prior to and at week 48 defined as confirmed HIV viral load (VL) <50 copies/mL without subsequent rebound or therapy change. A point estimate of -6.5% or higher for difference in proportion of responders (NVP-ATV/r) was considered consistent with a successful ARTEN study.

Summary of results

152 patients were treated: 89% male, 68% White, 31% Black. At baseline, mean log10 VL was 4.9 and median CD4 count (cells/mm3) was 176 (NVP) and 193 (ATV/r). Table 1 summarizes key outcome measures. Mean plasma lipid (mg/dL) changes from baseline through 48 weeks (last observation carried forward) were as follows (NVP and ATV/r arms, respectively): total cholesterol (TC) 18.2 and 13.8 (P=0.73); HDL cholesterol (HDLc) 9.6 and 3.5 (P=0.016); LDL cholesterol (LDLc) 8.7 and 6.9 (P=0.93); and triglycerides -4.7 and 8.4 (P=0.36).

Table 1

Conclusions

NVP + TDF/FTC was noninferior to ATV/r + TDF/FTC. Although trial discontinuations were greater in the NVP arm, VR was similar because of less documented VF. HDLc increased and TC/HDLc decreased significantly more for NVP than for ATV/r.

References

  1. Soriano V, Köppe S, Migrone H, et al: International AIDS Society - 5th Conference on HIV Pathogenesis. Treatment & Prevention. 2009

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This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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DeJesus, E., Mills, A., Bhatti, L. et al. Nevirapine (NVP) vs ritonavir-boosted atazanavir (ATV/r) combined with tenofovir/emtricitabine (TDF/FTC) in first-line therapy: NEWART 48-week data. JIAS 13, P4 (2010). https://doi.org/10.1186/1758-2652-13-S4-P4

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  • DOI: https://doi.org/10.1186/1758-2652-13-S4-P4

Keywords

  • Viral Load
  • Nevirapine
  • Virologic Response
  • Atazanavir
  • Trial Discontinuation