A phylotype-based analysis highlights the role of drug-naive HIV-positive individuals in the transmission of antiretroviral resistance in the UK

Raphaël Mourad, François Chevennet, David T. Dunn, Esther Fearnhill, Valerie Delpech, David Asboe, Olivier Gascuel*, Stéphane Hue

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Objective: Antiretroviral-naive HIV-positive individuals contribute to the transmission of drug-resistant viruses, compromising first-line therapy. Using phylogenetic inference, we quantified the proportion of transmitted drug-resistance originating from a treatment-naive source. Methods: Using a novel phylotype-based approach, 24550 HIV-1 subtype B partial pol gene sequences from the UK HIV Drug Resistance database were analysed. Ongoing transmission of drug resistance amongst HIV-positive individuals was identified as phylotypes of at least three sequences with at least one shared drug resistance mutation, a maximum intra-clade genetic distance of 4.0% and a basal branch support at least 90%. The time of persistence of the transmission chains was estimated using a fast least-squares molecular clock inference approach. Results: Around 70% of transmitted drug-resistance had a treatment-naive source. The most commonly transmitted mutations were L90M in the protease gene and K103N, T215D and T215S in reverse transcriptase. Reversion to wild type occurred at a low frequency and drug-independent reservoirs of resistance have persisted for up to 13 years. Conclusion: These results illustrate the impact of viral fitness on the establishment of resistance reservoirs and support the notion that earlier diagnoses and treatment of HIV infections are warranted for counteracting the spread of antiretroviral resistance. Phylotype-based phylogenetic inference is an attractive approach for the routine surveillance of transmitted drug resistance in HIV as well as in other pathogens for which genotypic resistance data are available.

Original languageEnglish
Pages (from-to)1917-1925
Number of pages9
JournalAIDS
Volume29
Issue number15
DOIs
Publication statusPublished - 24 Sep 2015

Bibliographical note

Funding Information:
The UK HIV Drug Resistance Database is supported by the Medical Research Council This project was also funded by the University College London Hospitals Biomedical Research Centre and the Collaborative HIV and Anti-HIV Drug Resistance Network (CHAIN), by the Wellcome Trust (grant number 092807) and a studentship from the Biotechnology and Biological Science Research Council (MR-C). The LabEx NUMEV supported the postdoctoral grant of R.M.

Publisher Copyright:
© 2015 Wolters Kluwer Health, Inc. All rights reserved.

Keywords

  • HIV
  • drug resistance
  • phylotype
  • treatment-naive

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