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P53 and ploidy assessed by flow cytometry in bladder washings
T R Griffiths1, J K Mellon, G A Pyle
1Department of Urology, Freeman Hospital, Newcastle upon Tyne, UK.
British Journal of Urology
|November 1, 1995
Summary
p53 expression and DNA content in bladder washings were analyzed. DNA content in washings better predicted outcomes than p53 expression for superficial bladder cancer patients.
Area of Science:
- Urothelial carcinoma research
- Cancer biomarker discovery
- Flow cytometry applications
Background:
- Accurate detection and prognosis of bladder cancer are crucial for effective patient management.
- p53 protein expression and DNA content are potential biomarkers for bladder cancer.
- Bladder washings offer a minimally invasive method for tumor cell sampling.
Purpose of the Study:
- To evaluate p53 expression in bladder washings and its correlation with DNA content and clinical outcomes.
- To assess the predictive value of p53 expression and DNA content in bladder washings for tumor recurrence and progression.
- To determine the utility of flow cytometry for analyzing these markers in bladder washings.
Main Methods:
- Analysis of bladder washings from 102 patients with superficial and invasive bladder cancer.
- Detection of p53 expression and DNA content using flow cytometry.
- Correlation of findings with tumor stage, grade, DNA ploidy, and clinical outcomes (recurrence, progression).
Main Results:
- p53-positive cells were detected in 24% of washings from patients with superficial bladder cancer.
- p53 expression correlated with tumor stage, grade, and abnormal DNA content.
- Flow cytometric analysis of DNA content in washings demonstrated greater short-term predictive value for clinical outcomes than p53 expression.
Conclusions:
- p53-positive cells are detectable in bladder washings, often associated with aneuploid tumors.
- Flow cytometric analysis of DNA content in bladder washings is a valuable tool for predicting short-term outcomes in bladder cancer.
- Bladder washings provide a convenient method for tumor cell sampling, with DNA content analysis showing higher prognostic utility than p53 expression.