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Published on: April 13, 2015
Telomere dysfunction in peripheral lymphocytes as a potential predisposition factor for renal cancer
Lina Shao1, Christopher G Wood, Di Zhang
1Department of Epidemiology, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA.
The Journal of Urology
|August 21, 2007
Summary
Short telomeres in peripheral blood lymphocytes are linked to increased renal cell carcinoma risk. This study confirms telomere shortening as a potential predisposing genetic factor for cancer.
Area of Science:
- Genetics
- Oncology
- Cell Biology
Background:
- Telomere integrity is crucial for maintaining genetic stability.
- Telomere length has been implicated in various diseases, including cancer.
- Previous methods for telomere length assessment in lymphocytes have limitations.
Purpose of the Study:
- To refine a quantitative fluorescence in situ hybridization assay for telomere length measurement in lymphocytes.
- To investigate the association between telomere length and renal cell carcinoma (RCC) risk.
- To determine if lymphocyte subpopulations influence telomere length differences in RCC.
Main Methods:
- A modified laser scanning cytometry-based quantitative fluorescence in situ hybridization assay was used.
- The assay incorporated 9 control cell lines for normalization.
- Telomere length was measured in CD4+ T cells, CD8+ T cells, and overall peripheral blood lymphocytes from 65 RCC patients and 65 matched controls.
Main Results:
- Mean normalized telomere length was significantly shorter in RCC cases compared to controls across all measured lymphocyte types (p < 0.05).
- Short telomere length in CD4+ T cells was associated with a 3.08-fold increased risk of RCC after adjusting for covariates (OR 3.08, 95% CI 1.14-8.34).
- A significant trend of increasing RCC risk with decreasing telomere length quartiles was observed (p for trend < 0.01).
Conclusions:
- The observed telomere length differences between RCC cases and controls are unlikely due to variations in lymphocyte subpopulations.
- The findings strongly support telomere shortening in peripheral blood lymphocytes as a genetic predisposing factor for cancer.
- This study provides robust evidence linking shorter telomeres to an elevated risk of developing renal cell carcinoma.
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