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Br J Cancer. 2013 Jul 9;109(1):172-83. doi: 10.1038/bjc.2013.296. Epub 2013 Jun 18.

Biological evidence for a causal role of HPV16 in a small fraction of laryngeal squamous cell carcinoma.

Author information

1
Division of Genome Modifications and Carcinogenesis, Infections and Cancer Program, German Cancer Research Center, Im Neuenheimer Feld 242, 69120 Heidelberg, Germany. g.halec@dkfz.de

Abstract

BACKGROUND:

Human papillomavirus (HPV) is a causal factor in virtually all cervical and a subset of oropharyngeal squamous cell carcinoma (OP-SCC), whereas its role in laryngeal squamous cell carcinoma (L-SCC) is unclear.

METHODS:

Formalin-fixed paraffin-embedded (N=154) and deep-frozen tissues (N=55) of 102 L-SCC patients were analysed for the presence of 51 mucosal HPV types. HPV DNA-positive (HPV DNA+) cases were analysed for E6*I mRNA transcripts of all high risk (HR)/probably/possibly (p)HR-HPV identified, and for HPV type 16 (HPV16) viral load. Expression of p16(INK4a), pRb, cyclin D1 and p53 was analysed by immunohistochemistry.

RESULTS:

Ninety-two patients were valid in DNA analysis, of which 32 (35%) had at least one HPV DNA+ sample. Among the 29 single infections, 22 (76%) were HPV16, 2 (7%) HPV56 and 1 each (4%) HPV45, HPV53, HPV70, HPV11 and HPV42. Three cases harboured HPV16 with HPV33 (twice) or HPV45. Only 32% of HPV DNA+ findings were reproducible. Among HPV16 DNA+ L-SCC, 2 out of 23 (9%) had high viral loads, 5 out of 25 (21%) expressed E6*I mRNA and 3 out of 21 (14%) showed high p16(INK4a) and low pRb expression (all three HPV16 RNA-positive), immunohistochemical marker combination not identified in any other HPV DNA+ or HPV DNA-negative (HPV DNA-) L-SCC, respectively.

CONCLUSION:

HPV type 16 has a causative role in a small subgroup of L-SCC (<5% in this German hospital series).

PMID:
23778529
PMCID:
PMC3708587
DOI:
10.1038/bjc.2013.296
[Indexed for MEDLINE]
Free PMC Article

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