p16(INK4A) expression in invasive laryngeal cancer

Papillomavirus Res. 2016 Dec:2:52-55. doi: 10.1016/j.pvr.2016.03.001. Epub 2016 Mar 9.

Abstract

We examined p16 expression in tumors from a population-based sample of laryngeal cancer cases diagnosed in the U.S. Samples had been previously genotyped for HPV DNA. Overall, p16 expression was observed in laryngeal tissue from 8 of 101 (7.9%) cases. p16 expression was observed in 2 of 16 (12.5%) cases previously determined to be HPV DNA positive. The two cases dually positive for p16 and HPV DNA were non-keratinizing SCC and papillary SCC tumors that were positive for genotypes 18 and 35/89, respectively. Positivity for p16 and/or HPV DNA was not associated with 5-year survival (log-rank p value= 0.55). Our findings support a limited role of HPV in laryngeal carcinogenesis. p16 is not a reliable surrogate for HPV status in laryngeal cancers and is not a predictor of laryngeal cancer survival.

Keywords: HPV; human papillomavirus; laryngeal cancer; larynx; p16; p16(INK4A); survival.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Aged
  • Carcinoma, Squamous Cell / genetics
  • Carcinoma, Squamous Cell / pathology
  • Carcinoma, Squamous Cell / virology
  • Cyclin-Dependent Kinase Inhibitor p16 / genetics*
  • Cyclin-Dependent Kinase Inhibitor p16 / metabolism
  • DNA, Viral / genetics
  • Female
  • Gene Expression*
  • Genotype
  • Human papillomavirus 16 / genetics
  • Human papillomavirus 16 / isolation & purification
  • Humans
  • Laryngeal Neoplasms / diagnosis
  • Laryngeal Neoplasms / genetics*
  • Laryngeal Neoplasms / pathology*
  • Laryngeal Neoplasms / virology*
  • Male
  • Middle Aged
  • Neoplasm Invasiveness
  • Papillomavirus Infections / complications
  • Papillomavirus Infections / virology
  • Survival Analysis
  • United States / epidemiology

Substances

  • Cyclin-Dependent Kinase Inhibitor p16
  • DNA, Viral
  • p12(INK4a) protein, human