Abstract

PURPOSE
The purpose of this study was to investigate the relationship between aberrant p53 expression and the presence of human papillomavirus DNA in transitional cell carcinomas of the urinary bladder.
MATERIALS AND METHODS
This study analyzed 30 paraffin-embedded transitional cell carcinoma of the urinary bladder, including 10 cases of grade I, 10 cases of grade II, and 10 cases of grade III, for the presence of DNA-HPV and abnormal accumulation of p53. We used immunohistochemical staining for p53 protein and in situ hybridization for HPV DNA, respectively.
RESULTS
Overall positive rate of HPV DNA type 16 and type 18 was 60.0% and 53.3%, respectively. Nuclear accumulation of p53 was found in 13 cases (43.3%) of all transitional cell carcinomas. In HPV DNA type 16 positive cases, the p53 was positive in 8 cases and negative in 10 cases. In HPV DNA type 16 negative cases, the p53 was positive in 5 cases and negative in 7 cases. In HPV DNA type 18 positive cases, the p53 was positive in 7 cases and negative in 9 cases. In HPV DNA type 16 negative cases, the p53 was positive in 6 cases and negative in 8 cases.
CONCLUSION
This results suggest that HPV infection and p53 gene accumulation may contribute to the significant role in the carcinogenesis of the utinary bladder. In additon, HPV infection and p53 accumulation may be related to tumor progression and higher grade.

• Keywords: Bladder neoplasm;Carcinogenesis;Human papillomavirus;p53 gene