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Human DNA topoisomerase‐IIα expression as a prognostic factor for transitional cell carcinoma of the urinary bladder
Author(s) -
Koren R.,
Kugel V.,
Dekel Y.,
Weissman Y.,
Livne P.M.,
Gal R.
Publication year - 2003
Publication title -
bju international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.773
H-Index - 148
eISSN - 1464-410X
pISSN - 1464-4096
DOI - 10.1046/j.1464-410x.2003.04118.x
Subject(s) - transitional cell carcinoma , topoisomerase , immunohistochemistry , mitotic index , stage (stratigraphy) , carcinoma , medicine , bladder cancer , urinary bladder , hazard ratio , urology , pathology , cancer , oncology , biology , mitosis , dna , confidence interval , paleontology , genetics , microbiology and biotechnology
Objective To investigate the immunohistochemical expression of topoisomerase II‐α (TII‐α, a nuclear enzyme, the expression of which increases rapidly at the end of the S to G2/M phase and declines when mitosis ends) in bladder urothelial neoplasms (transitional cell carcinoma), and its correlation with grade, stage and survival. patients and methods Histological sections from 57 urothelial neoplasms were stained immunohistochemically for TII‐α expression; the percentage of positive cells in the area of greatest staining was recorded as the TII‐α index. Results TII‐α nuclear staining was positive in all the samples except one. The mean ( sd ) TII‐α index was 10.7 (5.9) in urothelial neoplasms of low malignant potential (grade 1), 15.5 (5.0) in low‐grade (grade 2) and 42.1 (13.4) in high‐grade urothelial carcinoma (grade 3). The mean TII‐α index was 10.7 (5.9), 26.3 (14.8) and 44 (19) in stages pTa, pT1 and pT2, respectively. The TII‐α index was significant for predicting death from cancer, independently of the stage or grade of the disease ( P = 0.019, hazard ratio 1.1). Conclusions A higher TII‐α index indicates a greater probability of recurrence of disease and lower overall survival. Therefore TII‐α expression has prognostic value in bladder carcinoma.