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- W2035999396 abstract "With the approval of the first HIV-1 integrase inhibitor raltegravir and a second one in phase III clinical development (elvitegravir), genotypic and phenotypic resistance assays are required to guide antiretroviral therapy and to investigate treatment failure. In this study, a genotypic and phenotypic recombinant virus assay was validated for determining resistance against integrase inhibitors. The assays are based on the amplification of a region encompassing not only HIV-1 integrase, but also reverse transcriptase and RNAseH. The overall amplification success was 85% (433/513) and increased to 93% (120/129) for samples with a viral load above 3 log10 copies/ml. Both B and non-B HIV-1 subtypes could be genotyped successfully (93%; 52/56 and 100%; 49/49, respectively) and reproducibly. The phenotypic assay showed a high success rate (96.5%; 139/144) for subtype B (100%; 19/19) and non-B subtypes (92%; 45/49), and was found to be accurate and reproducible as assessed using well-characterized integrase mutants. Using both assays, baseline resistance to raltegravir and elvitegravir in subtype B and non-B HIV-1 strains selected at random was not observed, although integrase polymorphisms were present at varying prevalence. Biological cutoff values were found to be 2.1 and 2.0 for raltegravir and elvitegravir, respectively. In summary, a genotypic and phenotypic integrase resistance assay was validated successfully for accuracy, reproducibility, analytical and clinical sensitivity, and dynamic range." @default.
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- W2035999396 date "2009-11-01" @default.
- W2035999396 modified "2023-09-26" @default.
- W2035999396 title "A combined genotypic and phenotypic human immunodeficiency virus type 1 recombinant virus assay for the reverse transcriptase and integrase genes" @default.
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- W2035999396 doi "https://doi.org/10.1016/j.jviromet.2009.06.015" @default.
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