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J Acquir Immune Defic Syndr. 2004 Feb 1;35(2):126-30.

Characterization of nevirapine resistance mutations in women with subtype A vs. D HIV-1 6-8 weeks after single-dose nevirapine (HIVNET 012).

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1
Department of Pathology, The Johns Hopkins Medical Institutions, Baltimore, MD, USA. seshlem@jhmi.edu

Abstract

OBJECTIVE:

To compare the number and type of nevirapine (NVP) resistance mutations detected in Ugandan women with subtype A vs. D HIV-1 infection after single-dose NVP prophylaxis.

DESIGN:

In the HIVNET 012 trial, a higher rate of NVP resistance (NVPR) was seen in women with subtype D than A after single-dose NVP. In this study, the number and type of NVPR mutations detected 6-8 weeks after NVP were compared in women with subtypes A vs. D.

METHODS:

Plasma samples were available for 282 (92%) of 306 women who received NVP in HIVNET 012. Samples were analyzed with the ViroSeq HIV-1 Genotyping System (Applied Biosystems, Foster City, CA). Subtyping was performed by phylogenetic analysis of pol region sequences.

RESULTS:

Results were obtained for 279 women, including 147 with subtype A, 98 with subtype D, 6 with subtype C, and 28 with recombinant HIV-1. NVPR mutations were detected in 70 (25%) of 279 women. NVPR was more common in women with subtype D vs. A (35.7 vs. 19%, P = 0.0035). Complex patterns of NVPR mutations were detected in both subtypes. Among women with NVPR, 43% of women with subtype A and 46% of women with subtype D had >/=2 NVPR mutations. The mean number and pattern of NVPR mutations detected in women with subtypes A and D were similar.

CONCLUSIONS:

This study confirms a higher rate of NVPR in women with subtype D than A and further defines the pattern of NVPR mutations that emerge 6-8 weeks after single-dose NVP prophylaxis in these subtypes.

PMID:
14722443
[Indexed for MEDLINE]
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