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- W2046580842 abstract "Our study aimed at evaluating the presence of human papillomavirus (HPV) DNA in a series of 84 paraffin-embedded (PET) penile carcinomas. We have also investigated the presence of p53 mutations in these tumors by immunohistochemistry (IHC), single-stranded conformational polymorphism (SSCP) and DNA sequencing. Tissues were submitted to amplification of a 268 bp fragment from the beta-globin gene and a fragment of the E6 gene of HPV types 6, 11, 16 and 18. Twenty samples (18 fixed in Bouin's solution and 2 in buffered formalin) were found inadequate and were excluded from the analysis. In the remaining 64 tumors, HPV DNA was found in 26% of the samples. The prevalence of HPV in fresh samples of the same tumors was 56%. The most prevalent type was HPV 16 in both fresh samples and PET. Isotopic in situ hybridization was performed in all PET samples, but only 2 cases were positive, 1 for HPV 16 and 1 for HPV 18. Immunohistochemistry with anti-p53 pAb 1801 antibody showed a positive nuclear reaction over more than 5% of tumor cells in 26% of the cases. SSCP of exons 5-8 of the p53 gene was performed on 9 HPV-positive and 12 HPV-negative specimens. Abnormal mobility was found in 26% of the tumors, of which 2 were HPV-positive and 5 HPV-negative. Point mutations were detected in p53 exons 6 (1 case), 7 (1 case) and 8 (5 cases), showing that high-risk type HPVs and mutated p53 may coexist in these tumors. Our data indicate that a subset of penile carcinomas are etiologically related to HPV and that an overlapping subset may arise from mutational events in the p53 gene." @default.
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- W2046580842 date "1998-06-10" @default.
- W2046580842 modified "2023-10-17" @default.
- W2046580842 title "Human papillomavirus DNA andp53 status in penile carcinomas" @default.
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- W2046580842 doi "https://doi.org/10.1002/(sici)1097-0215(19980610)76:6<779::aid-ijc1>3.0.co;2-v" @default.
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