p15 Gene Expression in Bladder Tumors
Author Information
Author(s): Le Frère-Belda M A, Cappellen D, Daher A, Gil-Diez-de-Medina S, Besse F, Abbou C C, Thiery J P, Zafrani E S, Chopin D K, Radvanyi F
Primary Institution: Centre Hospitalier Universitaire Henri Mondor, Créteil Cedex, France
Hypothesis
The study investigates the involvement of the p15 gene in the evolution of bladder transitional cell carcinomas (TCCs).
Conclusion
Decreased expression of the p15 gene may play a significant role in the early transformation of bladder urothelium into cancer.
Supporting Evidence
- p15 was expressed in normal bladder urothelium but decreased in 66% of superficial TCCs.
- Homozygous deletions of the p15 gene were found in 42% of TCCs with decreased expression.
- There was no correlation between p15 and p16 mRNA levels, indicating independent regulation.
Takeaway
The study found that a gene called p15 is less active in many early bladder tumors, which might help them grow.
Methodology
p15 mRNA expression was analyzed using semi-quantitative RT-PCR in 75 TCCs, 13 bladder cell lines, and 6 normal bladder urothelia.
Limitations
The study did not explore all potential mechanisms of p15 down regulation beyond homozygous deletions and hypermethylation.
Participant Demographics
The study involved human bladder transitional cell carcinoma samples.
Statistical Information
P-Value
0.0015
Statistical Significance
p=0.0015
Digital Object Identifier (DOI)
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