Human papillomavirus genotypes and HPV16 variants in penile carcinoma.
The causative role of human papillomaviruses (HPV) and HPV16 variants has been extensively studied in uterine cervix dysplastic lesions and invasive carcinoma; few such studies, however, have been performed in penile tumors. We have investigated HPV genotype and HPV16 variant distribution on 41 penile cancer biopsies from Italian patients. Cases were extracted from the respective pathology departments databases of National Cancer Institutes in Naples and Milan. HPV sequences were detected by PCR and characterized by direct sequence analysis. Among the 19 HPV-positive cases (46.3%) 2 viral genotypes were identified (HPV16 and 18) with HPV16 accounting for 94.7% (18 out of 19) of the infections. Sequence analysis of E6, E7 genes and long control region (LCR) of 18 HPV16 isolates allowed the identification of European (E-G-350) and non-European (AA and Af-1) variants in 44.4% and in 55.6% of the samples, respectively. The AA variant alone represented 44.4% of all HPV16 infections, a significantly higher frequency of that observed in cervical carcinoma from Italian women (Tornesello et al., J Med Virol 2004;74:117-26). Our results suggest that HPV16 has a very high prevalence among penile cancer patients in Italy and the increased frequency of HPV16 non-European classes, particularly the AA, suggests that they are more oncogenic than European variants in penile tissue.
Tornesello
Maria Lina
ML
Viral Oncology and AIDS Reference Centre, National Cancer Institute, Fond. Pascale, Naples, Italy.
Duraturo
Maria Luisa
ML
Losito
Simona
S
Botti
Gerardo
G
Pilotti
Silvana
S
Stefanon
Bernardina
B
De Palo
Giuseppe
G
Gallo
Antonio
A
Buonaguro
Luigi
L
Buonaguro
Franco M
FM
D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000235:genetics / Q000821:virology; D004279:DNA, Viral / Q000235:genetics / Q000378:metabolism; D014644:Genetic Variation; D005838:Genotype; D052162:Human papillomavirus 16 / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D006801:Humans; D008297:Male; D008875:Middle Aged; D009856:Oncogene Proteins, Viral / Q000235:genetics / Q000378:metabolism; D050725:Papillomavirus E7 Proteins; D030361:Papillomavirus Infections / Q000453:epidemiology / Q000235:genetics / Q000821:virology*; D010412:Penile Neoplasms / Q000235:genetics* / Q000821:virology; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction
D004279:DNA, Viral; C068651:E6 protein, Human papillomavirus type 16; D009856:Oncogene Proteins, Viral; D050725:Papillomavirus E7 Proteins; D012333:RNA, Messenger; D012097:Repressor Proteins; C059731:oncogene protein E7, Human papillomavirus type 16