title: Human DNA topoisomerase II-alpha expression in laparoscopically treated renal cell carcinoma.
abstract: To investigate whether the expression of Topoisomerase II-alpha (TII-alpha) can serve as a prognostic factor in renal cell carcinoma (RCC), histological sections from 27 renal tumors were stained immunohistochemically for TII-alpha expression. The percentage of positive cells in the area of greatest staining was recorded as the TII-alpha index. TII-alpha nuclear staining was positive in all the samples except one. The mean TII-alpha index was 12.5 for grade 1, 44 for grade 2 and 113 for grade 3 tumors. The mean TII-alpha index was 22.3 in tumors which did not recur and 81 for tumors which recurred during the follow-up period. In this study, a higher TII-alpha index correlated with more aggressive tumor behaviour. However, a large cohort of patients should be assessed before drawing definitive conclusions.
authors.affiliation: Department of Urology, Klinikum Heilbronn and University of Heidelberg, Heilbronn, Germany.
authors.forename: Yoram
authors.initials: Y
authors.lastname: Dekel
authors.forename: Thomas
authors.initials: T
authors.lastname: Frede
authors.forename: Valentina
authors.initials: V
authors.lastname: Kugel
authors.forename: Gad
authors.initials: G
authors.lastname: Neumann
authors.forename: Jens
authors.initials: J
authors.lastname: Rassweiler
authors.forename: Rumelia
authors.initials: R
authors.lastname: Koren
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000951:Antigens, Neoplasm / Q000096:biosynthesis*; D002292:Carcinoma, Renal Cell / Q000201:enzymology / Q000473:pathology* / Q000601:surgery; D004250:DNA Topoisomerases, Type II / Q000096:biosynthesis*; D004268:DNA-Binding Proteins / Q000096:biosynthesis*; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D007680:Kidney Neoplasms / Q000201:enzymology / Q000473:pathology* / Q000601:surgery; D010535:Laparoscopy; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D000075223:Poly-ADP-Ribose Binding Proteins
chemical_list: D000951:Antigens, Neoplasm; D004268:DNA-Binding Proteins; D000075223:Poly-ADP-Ribose Binding Proteins; D004250:DNA Topoisomerases, Type II; C000618811:TOP2A protein, human