title: Quantitative analysis of cyclin E and protein p34 cdc2 expression in superficial bladder cancer.
abstract: In the present study, the expression of cyclin E and kinase p34 cdc2 was investigated in preinvasive bladder tumors. The study material consisted of bladder sections (grades: GI--16 cases, GII--10, and GIII--12) collected from 38 patients in the course of the tumor electroresection. Immunohistochemical examinations were carried out with immunoperoxidase method. Antigens were labeled with NCL-CYCLIN E or NCL-p34 cdc2 monoclonal antibodies (Novocastra, UK). Positive reaction was demonstrated using ABC-universal Kit (Novocastra, UK). Differences in the protein expression in relation to the tumor grade were determined with a non-parametric Mann-Whitney's test. Increasing grade of tumors was associated with down regulation of cyclin E visible as lower percentage of cyclin E-positive cells. These changes were statistically significant for GI group as compared to groups GII and GIII (p<0.001). There were no differences between the study groups in the p34 protein expression. Cyclin E expression was inversely correlated with tumor grade therefore may be helpful in establishing therapeutic procedure.
authors.affiliation: Department of Pathophysiology and Clinical Immunology, Medical University of Lódź. pkacz@neostrada.pl
authors.forename: Piotr
authors.initials: P
authors.lastname: Kaczmarek
authors.forename: Dariusz
authors.initials: D
authors.lastname: Tosik
authors.forename: Ewa
authors.initials: E
authors.lastname: Majewska
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Baj
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000378:metabolism; D016203:CDC2 Protein Kinase / Q000378:metabolism*; D002295:Carcinoma, Transitional Cell / Q000378:metabolism* / Q000473:pathology / Q000601:surgery; D019927:Cyclin E / Q000378:metabolism*; D015536:Down-Regulation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D001749:Urinary Bladder Neoplasms / Q000378:metabolism* / Q000473:pathology / Q000601:surgery
chemical_list: D014408:Biomarkers, Tumor; D019927:Cyclin E; D016203:CDC2 Protein Kinase