title: Enhanced detection of bladder cancer using the epithelial surface marker epithelial membrane antigen: a preliminary report.
abstract: The flow cytometry (FCM) technique allows for the rapid quantitative analysis of the DNA content of individual cells. In a variety of genitourinary tumors, DNA ploidy has a significant impact upon prognosis and ultimate patient survival. In patients having transitional cell cancer (TCC) of the bladder, FCM of voided urine and bladder barbotage specimens is highly correlated with cytologic analysis in the detection of malignant cells. One problem with this technique has been decreased sensitivity in samples containing large numbers of inflammatory cells. To improve FCM detection of TCC in bladder wash specimens, we developed a technique using a monoclonal antibody (Mab) specific to human, epithelial membrane antigen (EMA). The EMA cell-surface marker enabled us to differentiate bladder epithelial cells from lymphocytes and cellular debris. In combination with DNA analysis using propidium iodide, the EMA Mab increased the sensitivity and specificity of FCM compared to conventional analysis using propidium iodide alone. We conclude that epithelial cell-surface antigen staining using both EMA Mab and DNA staining can increase the FCM detection of TCC in bladder wash specimens.
authors.affiliation: Department of Urology, Columbia University, College of Physicians and Surgeons, New York, NY 10032.
authors.forename: K S
authors.initials: KS
authors.lastname: Ring
authors.forename: F
authors.initials: F
authors.lastname: Karp
authors.forename: M C
authors.initials: MC
authors.lastname: Benson
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm / Q000652:urine*; D014408:Biomarkers, Tumor / Q000652:urine*; D002295:Carcinoma, Transitional Cell / Q000175:diagnosis*; D003558:Cystoscopy; D003937:Diagnosis, Differential; D005434:Flow Cytometry / Q000379:methods*; D006801:Humans; D008562:Membrane Glycoproteins / Q000652:urine*; D008875:Middle Aged; D018396:Mucin-1; D015999:Multivariate Analysis; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis*; D014556:Urine / Q000166:cytology
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; D008562:Membrane Glycoproteins; D018396:Mucin-1