EBioMedicine (Apr 2017)

Mutational Correlates of Virological Failure in Individuals Receiving a WHO-Recommended Tenofovir-Containing First-Line Regimen: An International Collaboration

  • Soo-Yon Rhee,
  • Vici Varghese,
  • Susan P. Holmes,
  • Gert U. Van Zyl,
  • Kim Steegen,
  • Mark A. Boyd,
  • David A. Cooper,
  • Sabin Nsanzimana,
  • Shanmugam Saravanan,
  • Charlotte Charpentier,
  • Tulio de Oliveira,
  • Mary-Ann A. Etiebet,
  • Federico Garcia,
  • Dominique Goedhals,
  • Perpetua Gomes,
  • Huldrych F. Günthard,
  • Raph L. Hamers,
  • Christopher J Hoffmann,
  • Gillian Hunt,
  • Awachana Jiamsakul,
  • Pontiano Kaleebu,
  • Phyllis Kanki,
  • Rami Kantor,
  • Bernhard Kerschberger,
  • Vincent C. Marconi,
  • Jean D'amour Ndahimana,
  • Nicaise Ndembi,
  • Nicole Ngo-Giang-Huong,
  • Casper Rokx,
  • Maria M. Santoro,
  • Jonathan M. Schapiro,
  • Daniel Schmidt,
  • Lillian Seu,
  • Kim C.E. Sigaloff,
  • Sunee Sirivichayakul,
  • Lindiwe Skhosana,
  • Henry Sunpath,
  • Michele Tang,
  • Chunfu Yang,
  • Sergio Carmona,
  • Ravindra K. Gupta,
  • Robert W. Shafer

DOI
https://doi.org/10.1016/j.ebiom.2017.03.024
Journal volume & issue
Vol. 18, no. C
pp. 225 – 235

Abstract

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Tenofovir disoproxil fumarate (TDF) genotypic resistance defined by K65R/N and/or K70E/Q/G occurs in 20% to 60% of individuals with virological failure (VF) on a WHO-recommended TDF-containing first-line regimen. However, the full spectrum of reverse transcriptase (RT) mutations selected in individuals with VF on such a regimen is not known. To identify TDF regimen-associated mutations (TRAMs), we compared the proportion of each RT mutation in 2873 individuals with VF on a WHO-recommended first-line TDF-containing regimen to its proportion in a cohort of 50,803 antiretroviral-naïve individuals. To identify TRAMs specifically associated with TDF-selection pressure, we compared the proportion of each TRAM to its proportion in a cohort of 5805 individuals with VF on a first-line thymidine analog-containing regimen. We identified 83 TRAMs including 33 NRTI-associated, 40 NNRTI-associated, and 10 uncommon mutations of uncertain provenance. Of the 33 NRTI-associated TRAMs, 12 – A62V, K65R/N, S68G/N/D, K70E/Q/T, L74I, V75L, and Y115F – were more common among individuals receiving a first-line TDF-containing compared to a first-line thymidine analog-containing regimen. These 12 TDF-selected TRAMs will be important for monitoring TDF-associated transmitted drug-resistance and for determining the extent of reduced TDF susceptibility in individuals with VF on a TDF-containing regimen.

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