Related Experiment Videos
Telomerase activity in human renal cell carcinoma
C Mehle1, M A Piatyszek, B Ljungberg
1Department of Pathology, Umea University, Sweden.
Oncogene
|July 4, 1996
Summary
Telomerase activity, which synthesizes telomeric DNA, is frequently detected in renal cell carcinomas but not normal kidney tissue. This suggests telomerase is crucial for kidney cancer development and progression.
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- Telomeres maintain chromosome stability and shorten with cell division, limiting cellular lifespan.
- Immortal cell lines and tumors often exhibit mechanisms to counteract telomere shortening.
- Telomerase activity, responsible for synthesizing telomeric DNA, is implicated in cellular immortalization and cancer development.
Purpose of the Study:
- To investigate the presence and significance of telomerase activity in renal cell carcinoma (RCC).
- To correlate telomerase activity with telomere length and clinicopathological features in RCC.
Main Methods:
- Telomeric repeat amplification protocol (TRAP) was used to detect telomerase activity in 56 RCC tumors and 56 corresponding normal kidney samples.
- Telomere restriction fragment (TRF) length and hybridization signal were analyzed.
Main Results:
- Telomerase activity was detected in 71% (40/56) of RCC tumors, but in none of the normal kidney samples.
- Telomerase-negative tumors showed reduced mean TRF length and total telomere signal.
- No significant association was found between telomerase activity and clinicopathological parameters (grade, ploidy, stage, outcome).
Conclusions:
- Telomerase is frequently active in renal cell carcinomas, indicating its likely role in tumor evolution.
- The absence of telomerase activity in normal kidney tissue highlights its specific involvement in tumorigenesis.
- Further research into telomerase as a therapeutic target in RCC may be warranted.