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DNA adducts in normal bladder tissue and bladder cancer risk
Simone Benhamou1, Agnès Laplanche, Bertrand Guillonneau
1INSERM and Evry University EMI 00-06, Statistical Methods and Genetic Epidemiology of Multifactorial Diseases, Evry, France. benhamou@evry.inserm.fr
Mutagenesis
|September 10, 2003
Summary
This study suggests that DNA adducts in bladder tissue may indicate bladder cancer risk in smokers. Higher adduct levels showed a potential dose-response relationship with increased cancer risk.
Area of Science:
- Oncology
- Molecular Epidemiology
- Environmental Health
Background:
- Cigarette smoking is a known cause of bladder cancer.
- The direct link between smoking-induced DNA adducts in bladder cells and cancer risk is not well-established.
Purpose of the Study:
- To investigate the association between DNA adduct levels in normal bladder biopsies and bladder cancer risk.
- To explore a potential dose-response relationship between DNA adducts and bladder cancer.
Main Methods:
- A hospital-based case-control study involving 59 bladder cancer patients and 45 controls.
- Measurement of DNA adducts in normal bladder biopsies using 32P-post-labeling.
Main Results:
- Individuals with DNA adduct levels above the control median showed an approximately 2-fold increased risk of bladder cancer (OR = 1.9).
- A suggested trend indicated higher cancer risk with increasing DNA adduct levels, with ORs of 1.7 and 2.2 for intermediate and high adduct levels, respectively.
Conclusions:
- Findings provide preliminary evidence that DNA adducts in bladder tissue may serve as a biomarker for smoking-induced bladder cancer.
- Larger studies are necessary to validate these results and confirm the predictive value of DNA adducts.