Telomerase activity in solid transitional cell carcinoma, bladder washings, and voided urine

Area of Science:

• Oncology
• Biochemistry

Background:

• Telomerase is crucial for cellular immortality and is often active in human cancers.
• Transitional cell carcinoma (TCC) is a significant malignancy of the urinary tract.

Purpose of the Study:

• To investigate the prevalence of telomerase activity in TCC specimens and bodily fluids.
• To assess telomerase activity as a potential diagnostic marker for TCC.

Main Methods:

• Telomere repeat amplification protocol (TRAP) assay used to measure telomerase activity.
• Analyzed solid TCC tumors, benign urothelium, bladder washings, and voided urine samples.
• Compared TCC patients with control groups including benign urologic disease and asymptomatic individuals.

Main Results:

• Telomerase activity detected in 96% of solid TCC specimens, 81% of bladder washings, and 54% of voided urine from TCC patients.
• Lower telomerase activity observed in benign urothelium (15%) and asymptomatic controls' voided urine (4%).
• Sensitivity and specificity for TCC were 81% and 60% in bladder washings, and 54% and 50% in voided urine, respectively.

Conclusions:

• Telomerase activation is common in TCC and shows potential as a sensitive marker in bladder washings.
• A high false positive rate was observed in patients with benign urologic diseases.
• Further studies with larger cohorts are required to validate telomerase as a diagnostic and surveillance marker for TCC.