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      • Theses - Department of Molecular Biology and Genetics
      • Dept. of Molecular Biology and Genetics - Ph.D. / Sc.D.
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      Analysis of GSTM1, GSTT1, GSTP1, and TP53 polymorphisms as genetic risk factors for bladder cancer in the Turkish population

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      Author
      Törüner, Gökçe Altay
      Advisor
      Özçelik, Tayfun
      Date
      2001
      Publisher
      Bilkent University
      Language
      English
      Type
      Thesis
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      Abstract
      The effect of the GSTM1 and GSTT1 null genotypes, the GSTP1 Ile105Val, and TP53 Arg72Pro polymorphism on bladder cancer susceptibility was investigated in a case control study of 121 bladder cancer patients, and 121 age-sex matched controls in the Turkish population. The adjusted odds ratio (for age, sex, and smoking status) for the GSTM1 null genotype is 1.94 (95% CI 1.15- 3.26) and for the GSTP1 105 Ile/Val or Val/Val genotypes is 1.75 (95% CI 1.03- 2.99). GSTT1, and TP53 loci was not shown to be associated with bladder cancer. Combination of the two high risk genotypes, GSTM1 null and GSTP1 105 Ile/Val or Val/Val, revealed that the risk increases by 3.91 times (95% CI 1.88-8.13) when compared with the combination of the low risk genotypes of these loci. In individuals with a combined risk of cigarette smoking and the GSTM1 null genotype, bladder cancer risk is 2.81 (95% CI 1.23-6.35) relative to persons who do not smoke and carry the GSTM1 present genotype. The same risk for the GSTP1 105 Ile/Val or Val/Val genotypes is 2.38 (95% CI 1.12-4.95). These findings support the role for the GSTM1 null and the GSTP1 105 Ile/Val or Val/Val genotypes in the development of bladder cancer. Furthermore, gene-gene (GSTM1- GSTP1) and gene-environment (GSTM1-smoking, GSTP1-smoking) interactions increase this risk substantially.
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      http://hdl.handle.net/11693/15197
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