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COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
High prevalence of epidermodysplasia verruciformis-associated human papillomavirus DNA in actinic keratoses of the immunocompetent population.
Archives of Dermatological Research 2003 December
Skin cancers in both immunosuppressed and immunocompetent populations are associated with epidermodysplasia verruciformis human papillomavirus (EV-HPV) DNA. However, little is known about the prevalence of EV-HPVs in actinic keratoses in immunocompetent individuals. Actinic keratoses from 114 patients were classified as low-grade ( n=76) or high-grade ( n=38) according to the extent of histological atypia. HPV DNA was amplified from 54 frozen and 60 paraffin-embedded biopsy specimens by nested polymerase chain reaction (PCR) with several consensus and type-specific primers. PCR products were sequenced for typing. These results were compared with HPV detection in skin cancers ( n=20) and Bowen's disease ( n=18). A broad spectrum of EV-HPV types including oncogenic HPV5 and HPV8 and partially characterized sequences were detected in actinic keratoses and cutaneous cancers. In actinic keratoses a higher prevalence of EV-HPV DNA was found in frozen tissues than in formalin-fixed tissues (85% vs 67%). There was no difference between the low- and high-grade actinic keratoses either in terms of EV-HPV DNA prevalence or the results of serological study using HPV8 virus-like particles. The detection rate of EV-HPVs was lower in skin cancers and Bowen's disease. This would suggest involvement of EV-HPVs in the early stages of cutaneous oncogenesis.
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