Glutathione S-Transferase genotype may be a modifier on urothelial cell cycle in dyestuff manufacturing workers
研究了染料制造工人中GSTT1、GSTM1和GSTP1基因型与尿路上皮细胞周期的关联，发现特定基因型在联苯胺暴露下增加细胞异常风险，对职业暴露人群的癌症预防有参考价值。
<h3>Objectives</h3> In the past study, the latent period of bladder cancer caused by occupational exposure is 6 months to 40–8 years. Benzidine-based dyes have been produced and used in Taiwan until 1992. It can be expected that new patients with urothelial cancer in the near future. This study was designed to investigate the association of GSTT1, GSTM1 and GSTP1 genotype with the urothelial cells cycle in dye workers. <h3>Methods</h3> A cross-sectional study was designed to investigate the association between occupational exposure and cell cycle of urothelial epithelium. A total of 225 subjects who were working in a dyestuff-manufacturing factory, which established over 20 years and located at northern part of Taiwan, were sampled. A questionnaire was used to collect the demographical characteristics and work history. Urine and blood samples were also collected. The urinary epithelium cell cycle was analysed by flow cytometer. Polymorphisms of GSTM1 and GSTT1 genotype were identified by PCR, while polymorphism of GSTP1 was then followed by restriction enzyme length polymorphism technique. <h3>Results</h3> As a result of our study exhibited those who carries genotype of GSTM1 null and GSTT1 null would influence the DNA ploidy of urothelial cells to become abnormal under the exposure of benzidine. In smoking group, who carries genotype of GSTM1 null, GSTT1 null and slow GSTP1 would in higher risk of abnormal urothelial cells. <h3>Conclusions</h3> Polymorphisms of GSTM1, GSTT1 and GSTP1 genotype may be enhancing the association between occupational exposure and cell cycle of urothelial epithelium in dye manufacturing workers.