Papillomavirus Research (Dec 2015)

Deep sequencing of HPV16 genomes: A new high-throughput tool for exploring the carcinogenicity and natural history of HPV16 infection

  • Michael Cullen,
  • Joseph F. Boland,
  • Mark Schiffman,
  • Xijun Zhang,
  • Nicolas Wentzensen,
  • Qi Yang,
  • Zigui Chen,
  • Kai Yu,
  • Jason Mitchell,
  • David Roberson,
  • Sara Bass,
  • Laurie Burdette,
  • Moara Machado,
  • Sarangan Ravichandran,
  • Brian Luke,
  • Mitchell J. Machiela,
  • Mark Andersen,
  • Matt Osentoski,
  • Michael Laptewicz,
  • Sholom Wacholder,
  • Ashlie Feldman,
  • Tina Raine-Bennett,
  • Thomas Lorey,
  • Philip E. Castle,
  • Meredith Yeager,
  • Robert D. Burk,
  • Lisa Mirabello

Journal volume & issue
Vol. 1
pp. 3 – 11

Abstract

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For unknown reasons, there is huge variability in risk conferred by different HPV types and, remarkably, strong differences even between closely related variant lineages within each type. HPV16 is a uniquely powerful carcinogenic type, causing approximately half of cervical cancer and most other HPV-related cancers. To permit the large-scale study of HPV genome variability and precancer/cancer, starting with HPV16 and cervical cancer, we developed a high-throughput next-generation sequencing (NGS) whole-genome method. We designed a custom HPV16 AmpliSeq™ panel that generated 47 overlapping amplicons covering 99% of the genome sequenced on the Ion Torrent Proton platform. After validating with Sanger, the current “gold standard” of sequencing, in 89 specimens with concordance of 99.9%, we used our NGS method and custom annotation pipeline to sequence 796 HPV16-positive exfoliated cervical cell specimens. The median completion rate per sample was 98.0%.Our method enabled us to discover novel SNPs, large contiguous deletions suggestive of viral integration (OR of 27.3, 95% CI 3.3–222, P=0.002), and the sensitive detection of variant lineage coinfections. This method represents an innovative high-throughput, ultra-deep coverage technique for HPV genomic sequencing, which, in turn, enables the investigation of the role of genetic variation in HPV epidemiology and carcinogenesis. Keywords: HPV16, HPV epidemiology, HPV genomics