Simultaneous and sensitive detection of human immunodeficiency virus type 1 (HIV) drug resistant genotypes by multiplex oligonucleotide ligation assay

Giovanina M. Ellis, Tatyana A. Vlaskin, Andrew Koth, Louise E. Vaz, Sandra E. Dross, Ingrid A. Beck, Lisa M. Frenkel

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Oligonucleotide ligation assay (OLA) is a highly specific and relatively simple method to detect point mutations encoding HIV-1 drug-resistance, which can detect mutants comprising ≥2-5% of the viral population. Nevirapine (NVP), tenofovir (TDF) and lamivudine (3TC) are antiretroviral (ARV) drugs used worldwide for treatment of HIV infection and prevention of mother-to-child-transmission. Adapting the OLA to detect multiple mutations associated with HIV resistance to these ARV simultaneously would provide an efficient tool to monitor drug resistance in resource-limited settings. Known proportions of mutant and wild-type plasmids were used to optimize a multiplex OLA for detection of K103N, Y181C, K65R, and M184V in HIV subtypes B and C, and V106M and G190A in subtype C. Simultaneous detection of two mutations was impaired if probes annealed to overlapping regions of the viral template, but was sensitive to ≥2-5% when testing codons using non-overlapping probes. PCR products from HIV-subtype B- and C-infected individuals were tested by multiplex-OLA and compared to results of single-codon OLA. Multiplex-OLA detected mutations at codon pairs 103/181, 106/190 and 65/184 reliably when compared to singleplex-OLA in clinical specimens. The multiplex-OLA is sensitive and specific and reduces the cost of screening for NVP, TDF and/or 3TC resistance.

Original languageEnglish (US)
Pages (from-to)39-43
Number of pages5
JournalJournal of Virological Methods
Volume192
Issue number1-2
DOIs
StatePublished - Sep 2013

Keywords

  • Antiretroviral drug resistance
  • HIV
  • Minority genotypes
  • Oligonucleotide ligation assay

ASJC Scopus subject areas

  • Virology

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