Human papillomavirus (HPV) and Epstein-Barr virus (EBV) in keratinizing versus non- keratinizing squamous cell carcinoma of the oropharynx

Francesco Broccolo, Giulia Ciccarese, Agostino Rossi, Luca Anselmi, Francesco Drago, Antonio Toniolo

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Oral and oropharyngeal squamous cell carcinomas (OSCC and OPSCC) represent the majority of head and neck squamous cell carcinomas (HNSCC). Human papillomavirus (HPV) is an important etiologic factor together with Epstein-Barr virus (EBV). Little is known on the prevalence of major herpesviruses [EBV, cytomegalovirus (CMV) and HHV-6, - 7 and - 8] in HNSCCs. Methods: Fifty-one formalin-fixed paraffin-embedded (FFPE) tissue samples taken at surgery (40 oropharyngeal, 11 oral) were analyzed for 40 HPV genotypes (20 high-risk types), EBV, CMV, HHV-6, - 7 and - 8 by quantitative PCR. Expression of the HPV-induced p16INK4A protein was also investigated by immunohistochemistry (IHC). Results: In SCC, the prevalence of EBV was significantly higher compared to that of HPV (EBV 51% vs. HPV 19.5%; P = 0.005). HPV infection was found in 25% of OPSCC and in none of the OSCC; conversely, higher prevalence of EBV was found in OSCC (72.7%). HPV and EBV co-infection was detected only in 4 (10%) OPSCC. CMV was detected in only two cases, whereas HHV-6, - 7 and - 8 resulted negative. The prevalence of HPV but no EBV was associated with the non-keratinizing SCC type (NKSCC) compared to the keratinizing SCC type (KSCC)(HPV-DNA P < 0.005; EBV = 0.054). Conclusions: Single HPV or EBV positivity was higher in OSCC than in OPSCC. Other potentially oncogenic herpesvirus types were minimally or not represented.

Original languageEnglish
Article number32
JournalInfectious Agents and Cancer
Volume13
Issue number1
DOIs
Publication statusPublished - Nov 9 2018

Keywords

  • Cancer
  • Co-infection
  • EBV
  • HPV
  • HPV-induced p16 immunohistochemistry
  • Oral
  • Oropharyngeal

ASJC Scopus subject areas

  • Epidemiology
  • Oncology
  • Infectious Diseases
  • Cancer Research

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