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Arch Pathol Lab Med. 2013 Aug;137(8):1088-93. doi: 10.5858/arpa.2012-0122-OA.

High-risk human papillomavirus DNA detected in primary squamous cell carcinoma of urinary bladder.

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  • 1Department of Pathology & Laboratory Medicine, University of Miami, Miami, Florida 33136, USA.

Abstract

CONTEXT:

We reported previously that more than one-third (37%) of primary bladder squamous cell carcinomas (SCCs) demonstrate diffuse p16 immunoreactivity independent of gender. This observation made us question whether p16 overexpression in bladder carcinoma is due to human papillomavirus (HPV)-dependent mechanisms.

OBJECTIVES:

To determine whether the presence of high-risk HPV (HR-HPV) DNA could be detected in these tumor cells.

DESIGN:

Fourteen cases of primary bladder SCC, which were positive for p16 by immunohistochemistry, were probed for the detection of HR-HPV by in situ hybridization and the signal amplification Invader assay. Samples positive for detection of HR-HPV by Invader assay were amplified by using HR-HPV type-specific primers, and amplification products were DNA sequenced.

RESULTS:

Detection of HR-HPV by the in situ hybridization method was negative in all cases (0 of 14). However, in 3 of 14 cases (21.4%), the presence of HR-HPV DNA was detected with the Cervista HPV HR Invader assay, which was followed by identification of genotype. All positive cases were confirmed by using HR-HPV type-specific amplification followed by DNA sequencing. Identified HR-HPV genotypes included HPV 16 (2 cases) and HPV 35 (1 case).

CONCLUSIONS:

High-risk HPV DNA is detectable in a subset of primary bladder SCCs. Based on the well-documented carcinogenic potential of HR-HPV, there is a necessity for additional studies to investigate the role of HR-HPV in bladder carcinogenesis.

PMID:
23899065
DOI:
10.5858/arpa.2012-0122-OA
[PubMed - indexed for MEDLINE]
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