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Article Dans Une Revue The Journal of antimicrobial chemotherapy Année : 2021

Assessment of intra-sample variability in HIV-1 DNA drug resistance genotyping.


Background and objectives HIV-1 drug resistance testing can be performed in proviral DNA. The non-homogenous distribution of viral variants in cells can impact the performance of this method. We assessed the variability of HIV-1 DNA genotyping results in the same blood sample using a next-generation sequencing (NGS) method. Methods For each included patient, a blood sample from a single venipuncture was split into five 1 mL aliquots, which were independently tested in the same run. HIV-1 DNA was quantified in blood samples using real-time PCR, and NGS was performed with the Sentosa platform combined with the Sentosa SQ HIV genotyping Assay. Results A total of 60 aliquots from 12 samples (12 patients) were tested. The median age was 45.50 years old, and all patients were treated with antiretrovirals. A significant variability can sometimes be observed in HIV-1 DNA quantification between aliquots from the same sample, with a coefficient of variation ranging from 23% to 89%. The analysis of resistance-associated mutations (RAMs) with a 20% cut-off found some discordances in RAMs profile between aliquots from the same sample for 5, 3 and 3 patients in the reverse transcriptase, protease and integrase genes, respectively. The analysis with a lower cut-off (10%) showed additional mutations, but did not improve the intra-sample concordance. Conclusions There is an intra-sample variability in HIV-1 DNA resistance test results, and repetition may sometimes bring additional information, but the extent of its clinical impact still requires further investigation.
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Dates et versions

hal-04315798 , version 1 (30-11-2023)



L. Millière, Laurence Bocket, C. Tinez, Olivier Robineau, Nathalie Veyer, et al.. Assessment of intra-sample variability in HIV-1 DNA drug resistance genotyping.. The Journal of antimicrobial chemotherapy, 2021, Journal of Antimicrobial Chemotherapy, 76 (8), p. 2143-2147. ⟨10.1093/jac/dkab149⟩. ⟨hal-04315798⟩


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