Deep sequencing of human papillomavirus positive loco-regionally advanced oropharyngeal squamous cell carcinomas reveals novel mutational signature

Christian Grønhøj, David H Jensen, Tina Agander, Katalin Kiss, Estrid Høgdall, Lena Specht, Frederik Otzen Bagger, Finn Cilius Nielsen, Christian von Buchwald

7 Citations (Scopus)
28 Downloads (Pure)

Abstract

BACKGROUND: The genetic profile for human papilloma virus positive (HPV+) oropharyngeal squamous cell carcinomas (OPSCC) remains largely unknown. The purpose of this study was to sequence tissue material from a large cohort of locoregionally-advanced HPV+ OPSCCs.

METHODS: We performed targeted deep sequencing of 395 cancer-associated genes in 114 matched tumor/normal loco-regionally advanced HPV+ OPSCCs. Mutations and copy number aberrations were determined.

RESULTS: We identified a total of 3459 mutations with an average of 10 mutations per megabase and a median of 28 variants per sample. The most frequently mutated genes were KALRN (28%), SPTBN1 (32%), KMT2A (31%), ZNRF3 (9%), BNC2 (12%), NOTCH2 (25%), FGFR2 (12%), SMAD2 (6%), and AR (13%). Our findings were dominated by COSMIC signature 5 and 12, represented in other head and neck cancers and in hepatocellular carcinomas, respectively.

CONCLUSIONS: We have identified multiple genetic aberrations in HPV+ OPSCCs, and the COSMIC signature 12 as most prevalent. The mutations harbour both therapeutic and prognostic potential.

Original languageEnglish
Article number640
JournalBMC Cancer
Volume18
Issue number1
Pages (from-to)1-10
Number of pages10
ISSN1471-2407
DOIs
Publication statusPublished - 7 Jun 2018

Keywords

  • Biomarkers, Tumor/genetics
  • DNA Mutational Analysis
  • High-Throughput Nucleotide Sequencing
  • Humans
  • Oropharyngeal Neoplasms/genetics
  • Papillomavirus Infections/complications
  • Squamous Cell Carcinoma of Head and Neck/genetics
  • Transcriptome

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