Association between glutathione S-transferases M1, T1 and P1 gene polymorphisms and prostate cancer in Koreans

다국어 초록 (Multilingual Abstract)

Prostate cancer (PCa) is the most commonly diagnosed cancer in the developed world, and the incidence of this cancer is rising rapidly in many countries. Several polymorphic genes encoding enzymes involved carcinogenesis have been studied as potential risk factor of prostate cancer. Genetic polymorphisms in glutathione S-transferases M1 (GSTM1), T1 (GSTT1) and P1 (GSTP1) genes have been constantly reported to have a meaningful effect on prostate cancer risk. But other surveys of this relationship have yielded inconsistent results. To assess the possible contribution of the GSTM1, GSTT1, and GSTP1 gene polymorphisms in prostate cancer, we performed a population-based study of 139 prostate cancer patients and 115 healthy controls based on their genotype distributions of the genes. There were no differences in distributions of genotype frequencies of GSTM1 and GSTP1 polymorphisms between prostate cancer patients and controls (OR 1.60, 95 % CI 0.886–2.860 for GSTM1 and OR 1.38, 95 % CI 0.739–2.577 for GSTP1). In contrast, the distribution of GSTT1-null genotype is significantly different between the prostate cancer case and controls (OR 0.26, 95 % CI 0.128–0.518, p\0.001). Meanwhile, GSTP1 I/V and V/V genotypes were significantly associated with prostate cancer where the PSA level was more than 10.0 (OR 2.73, 95 % CI 1.319–5.639, p = 0.006). Thus, our data imply that the GSTT1-null genotype may not be a risk factor but a protective factor of prostate cancer and GSTP1 Val allele is a risk factor for the prostate cancer where the PSA level was high, although functional studies with larger sample size are necessary to elucidate these findings.

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