Abstract:
:Ninety-eight cases of transitional-cell carcinoma (TCC) of the renal pelvis and ureter, including dysplastic lesions, were studied for tumor incorporation of human papillomavirus (HPV) type-16 and type-18 DNA by in situ hybridization (ISH) with DNA probes for each HPV viral type. Immunohistochemical analysis of p53 expression was also performed. Fresh tumor tissues from 26 patients were also studied for p53 mutations in exons 4 through 9 by direct sequencing and for HPV infection by polymerase chain reaction (PCR). Thirty-two tumors were positive for HPV DNAs, including 6 double-positive cases. Among these tumors, adjacent dysplastic lesions in 21 cases (66%) also revealed identical reactivity. Overexpressed p53 was detected in 26 cases. Expression of p53 was also detected in dysplastic lesions in 19 out of these 26 cases (73%). Three cases were positive for both HPV DNA and p53 antibody. p53 point mutation was detected in 7 of 26 cases, 6 of which were also positive for p53. HPV type-16 DNA was detected in 6 cases by PCR, 4 of which were also ISH-positive. Overexpressed p53 was frequently detected in invasive and non-papillary tumors (p < 0.01) and in high-grade tumors (p < 0.05). HPV infection was more common in non-invasive and papillary tumors (p < 0.05). These findings suggest that HPV infection or overexpression (mutation) of p53 may be an early event and be related to phenotypes of tumor-cell growth patterns and progression.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Furihata M,Yamasaki I,Ohtsuki Y,Sonobe H,Morioka M,Yamamoto A,Terao N,Kuwahara M,Fujisaki Ndoi
10.1002/ijc.2910640503subject
Has Abstractpub_date
1995-10-20 00:00:00pages
298-303issue
5eissn
0020-7136issn
1097-0215journal_volume
64pub_type
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